Cummins B Series engine
Encyclopedia
The Cummins B Series is a family of straight-four and straight-6 diesel
truck
and industrial piston engines manufactured by Cummins
. The B Series is known for displacing "one liter per cylinder" because of the popular 3.9 litre straight-four and 5.9 litre straight-six. A 3.3 litre straight-four is also available. The B Series is widely used in many segments, including pickup truck
s (the Dodge Ram
), bus
es, military vehicles, construction equipment, and marine. Some of the construction and marine applications have actually featured two B series Cummins engines.
The engine was originally designed by Cummins and Case Corporation
for commercial truck
applications, and appeared in a light-duty truck, the Dodge Ram
, in 1989. This was not the first engine to appear in Dodges as a Diesel option. Mid-1970s D models offered the rare, underpowered, Mitsubishi non-turbo diesel.
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for extra reliability. Also specified is a deep-skirt engine block and extremely strong connecting rods. A Holset turbocharger
is used. The original B Series was updated with 24 valves
and an electronic engine management system to become the ISB in 1998.
fuel systems, injector, and VE rotary pump and P7100 inline injection pumps. Some early 6BT's were supplied with CAV rotary pumps instead, before the Bosch system became the sole standard. This engine started life in 1984 designed as an agricultural engine, for use in Case agricultural equipment.
After 1989, the 6bt engine was adapted to be used in light pickup trucks and medium sized commercial trucks and buses. source cummins.com.
pickup truck, it quickly became a popular alternative to the large V8
gasoline engines normally used in full-size pickup trucks, while producing nearly double the torque at low engine speeds. The 6BT was also made popular for its fuel mileage over gasoline engine counterparts, roughly doubling fuel mileage in some applications.
The Dodge Ram was the only diesel pickup, during the time, that featured Direct Injection and didn't rely on glow plugs for cold weather start up.
The 1989–1993 Dodge Ram pickup engines were rated at 160 hp and 400 lbft. The fuel systems for these Dodge Rams featured Bosch injectors and Bosch VE mechanically controlled fuel injection pumps. Intercooler
s were added 1991. In 1994 when Dodge introduced the completely restyled Ram, changes were made to the 6BT as well. The fuel systems for these Dodge Rams featured different Bosch injectors and a de-tuned Bosch P7100 mechanically controlled fuel injection pump. The 1994–1995 6BT was rated at 160 hp and 400 lbft when equipped with the 47RH automatic transmission, and 175 hp and 420 lbft when equipped with the NV4500 manual transmission. The 1996–1998 6BT was rated at 180 hp and 420 lbft when equipped with the 47RE automatic transmission, and 215 hp and 440 lbft when equipped with the NV4500 manual transmission.
of 17.5:1. The EGR valve was dropped for the 24 valve ISB engines.
list for 2004.
One unusual feature of the ISB is that it is a multi-valve
pushrod engine design. The engine displaces 5883 cc, with a 102.1 millimetres (4.02 in) cylinder bore and 119.9 millimetres (4.72 in) piston stroke. A turbocharger
output in the high-compression (17.2:1 in recent versions) diesel. It is an all-iron engine with forged steel connecting rods, an assembled camshaft
, and a cast aluminum intake manifold. The engine is produced in Columbus, Indiana
.
The ISB uses electronically controlled Robert Bosch GmbH
fuel systems, unlike the 6BT which were mechanical. Early ISB engines utilize Bosch injectors and a Bosch VP44 high pressure pump. Later ISB designs have common rail fuel injection, and once again utilized Bosch injectors and a Bosch CP3 high pressure pump.
1998, the Dodge Ram switched from the 6BT to the ISB to meet updated emissions requirements. Like other ISB's, these engines started out using the Bosch
VP44 rotary injection pump. The VP44 setup meant that timing and fuel could be precisely controlled, which led to cleaner emissions. However, VP44 failure rates were very high versus the older P7100 injection pump. The compression ratio in these engines was 16.3:1. The 1998–2000 ISB was rated at 215 hp and 420 lbft when equipped with the 47RE automatic transmission
. The 1998 ISB was rated at 235 hp and 420 lbft when equipped with the manual transmission
. The 1999–2000 ISB was rated at 235 hp and 460 lbft when equipped with a manual transmission. For the 2001–2002 model years, a standard output and high output ISB Cummins engine was offered. The standard output, which was the same as the previous engines was rated to 235 hp and 460 lbft when equipped with either a manual transmission or automatic. The high output ISB was rated at 245 hp and 505 lbft, and only a NV5600 six-speed manual transmission was offered behind it. The high output engine was different in a few ways from the standard output engine. The high output ISB had higher compression (17.1:1), powdered metal valve seat inserts and a larger flywheel
. The Bosch fuel system was reworked as well to allow increase fuel delivery and a slight increase in timing.
fuel injection, again increasing power output. On automatic equipped vehicles, the 47RE was upgraded internally to increase durability and torque
capacity, now known as the 48RE. The 2003 rating for the Dodge truck was released at 305 horsepower (224 kW; 308 PS) and 555 foot-pounds (752 N·m). Midway through the 2004 model year, the Cummins 600 was introduced, producing 325 hp at 2,900 rpm and 600 lbft at 1,600 rpm. This high torque output gives the engine its name, and also offers a high specific output of 102 lbft per litre of displacement (1.67 ft·lbf/CID). A 610 version, new for the 2005 model year, pushed torque to 610 lbft. This engine was noticeably quieter than the previous engines.
s. The 3.9L/4B is an inline four cylinder turbodiesel that was popular for many step van applications, including bread vans and other commercial vehicles. This engine is also used in various industrial, construction and agricultural applications. With a cylinder bore of 4.02 inches (10.2 cm) and a piston stroke of 4.72 inches (12 cm), the engine had a wet weight of 745 pounds (338 kg). In recent years it produced 130 hp and 355 lbft of torque. The 4BT today is also popular as a conversion engine among many light-duty pickup trucks that were originally equipped with gasoline engines. This is due to its high fuel efficiency while producing power comparable to the original light-duty gasoline engine. The 4BT engines have the same piston
s, connecting rod
s, valvetrain
components, and injectors as their 6BT counterparts.
2500/3500 pickup trucks with the Chrysler-built six-speed 68RFE automatic transmission built at the Kokomo Transmission
plant in Kokomo, Indiana
. Engine torque
is slightly reduced with the Mercedes G56 6-speed manual transmission at 350 hp and 610 lbft. The 2007 and newer 3500 Cab & Chassis trucks only get the 305 hp and 610 lbft version of the B6.7, whether it has the Aisin AS68RC or the Mercedes G56 6-speed manual transmission. As for the 2008 4500/5500 medium duty Chassis Cabs or the Sterling Bullet Trucks, they will also receive the 305 hp and 610 lbft version of the B6.7, whether it has the Aisin AS68RC or the Mercedes G56 6-speed manual transmission. Late model 2011 Ram trucks produce 350 hp and 800 lbft, with the exhaust brake rating boosted from 150 hp to 222 hp.
There are many changes over the previous B5.9 for the Dodge truck, the most obvious being the larger displacement. The B6.7 had an increase of cylinder bore and piston stroke to 4.21 inches (10.7 cm) and 4.88 inches (12.4 cm) stroke, respectively, thereby giving a displacement of 408 cubic inch. It includes a cooled EGR system, variable geometry turbocharger
, a new higher-pressure version of the Bosch
direct-injection fuel system, and a particulate filter designed to reduce diesel particulate matter by more than 90%.
. Still, it retains 45% of the original 5.9 components.
The 6.7L base engine design proposal was led by Jerl Purcell and his team out of the Darlington, England Cummins facility. Jerl was instrumental in the development of the rear gear train ISB engine that resulted from the European Engine Alliance and is considered the Father of this engine layout. Cummins reduced development time and cost by 10%–15% using KIVA
, a Computational Fluid Dynamics
code developed by Los Alamos National Laboratory
, to develop its 6.7L diesel engine, which met 2010 emission standards as early as 2007. The 6.7L ISB engine was launched in the European EURO4 application and the Tier III off high-way application before being released in the Dodge Truck and US EPA medium duty automotive applications in January 2007.
The Dodge trucks' B6.7 competes head to head with V8 engine
s offered by General Motors
and Ford Motor Company
: the DMAX-manufactured Duramax, and the Navistar-manufactured 6.4 Power Stroke.
Both the B4.5 and B6.7 are used in DAF Trucks
' LF45, and LF55 and CF65 range respectively.
Urban bus @ 1,300 rpm
, 200 hp electronically governed at 2,600 rpm @ 1,600 rpm, 220 hp electronically governed at 2,600 rpm @ 1,600 rpm, 240 hp electronically governed at 2,600 rpm @ 1,600 rpm, 260 hp electronically governed at 2,600 rpm @ 1,600 rpm, 280 hp electronically governed at 2,600 rpm
Diesel engine
A diesel engine is an internal combustion engine that uses the heat of compression to initiate ignition to burn the fuel, which is injected into the combustion chamber...
truck
Truck
A truck or lorry is a motor vehicle designed to transport cargo. Trucks vary greatly in size, power, and configuration, with the smallest being mechanically similar to an automobile...
and industrial piston engines manufactured by Cummins
Cummins
Cummins Inc. is a Fortune 500 corporation that designs, manufactures, distributes and services engines and related technologies, including fuel systems, controls, air handling, filtration, emission control and electrical power generation systems...
. The B Series is known for displacing "one liter per cylinder" because of the popular 3.9 litre straight-four and 5.9 litre straight-six. A 3.3 litre straight-four is also available. The B Series is widely used in many segments, including pickup truck
Pickup truck
A pickup truck is a light motor vehicle with an open-top rear cargo area .-Definition:...
s (the Dodge Ram
Dodge Ram
The Dodge Ram is a full-size pickup truck manufactured by the Chrysler Group LLC. As of late 2010, it has been sold under the Ram Trucks brand. Previously, Ram was part of the Dodge lineup of light trucks...
), bus
Bus
A bus is a road vehicle designed to carry passengers. Buses can have a capacity as high as 300 passengers. The most common type of bus is the single-decker bus, with larger loads carried by double-decker buses and articulated buses, and smaller loads carried by midibuses and minibuses; coaches are...
es, military vehicles, construction equipment, and marine. Some of the construction and marine applications have actually featured two B series Cummins engines.
The engine was originally designed by Cummins and Case Corporation
Case Corporation
Case Corporation was a manufacturer of construction and agricultural equipment. In 1999 it merged with New Holland to form CNH Global, a Fiat Group division...
for commercial truck
Truck
A truck or lorry is a motor vehicle designed to transport cargo. Trucks vary greatly in size, power, and configuration, with the smallest being mechanically similar to an automobile...
applications, and appeared in a light-duty truck, the Dodge Ram
Dodge Ram
The Dodge Ram is a full-size pickup truck manufactured by the Chrysler Group LLC. As of late 2010, it has been sold under the Ram Trucks brand. Previously, Ram was part of the Dodge lineup of light trucks...
, in 1989. This was not the first engine to appear in Dodges as a Diesel option. Mid-1970s D models offered the rare, underpowered, Mitsubishi non-turbo diesel.
General engine features
Every Cummins powered Dodge Pickup (since initial production in 1989) has come equipped with a turbocharger. It uses a gear-drive camshaftCamshaft
A camshaft is a shaft to which a cam is fastened or of which a cam forms an integral part.-History:An early cam was built into Hellenistic water-driven automata from the 3rd century BC. The camshaft was later described in Iraq by Al-Jazari in 1206. He employed it as part of his automata,...
for extra reliability. Also specified is a deep-skirt engine block and extremely strong connecting rods. A Holset turbocharger
Turbocharger
A turbocharger, or turbo , from the Greek "τύρβη" is a centrifugal compressor powered by a turbine that is driven by an engine's exhaust gases. Its benefit lies with the compressor increasing the mass of air entering the engine , thereby resulting in greater performance...
is used. The original B Series was updated with 24 valves
Multi-valve
In automotive engineering a multi-valve or multivalve engine is one where each cylinder has more than two valves. A multi-valve engine has better breathing and can operate at higher revolutions per minute than a two-valve engine, delivering more power.- Multi-valve rationale :A multi-valve design...
and an electronic engine management system to become the ISB in 1998.
6BT
The 5.9 litre 6BT, aka the Cummins "12-valve" was the first member of the "B" engine family to be used in a light truck vehicle. The 6BT used Robert Bosch GmbHRobert Bosch GmbH
Robert Bosch GmbH is a multinational engineering and electronics company headquartered in Gerlingen, near Stuttgart, Germany. It is the world's largest supplier of automotive components...
fuel systems, injector, and VE rotary pump and P7100 inline injection pumps. Some early 6BT's were supplied with CAV rotary pumps instead, before the Bosch system became the sole standard. This engine started life in 1984 designed as an agricultural engine, for use in Case agricultural equipment.
After 1989, the 6bt engine was adapted to be used in light pickup trucks and medium sized commercial trucks and buses. source cummins.com.
Dodge Ram 6BT
Appearing in the 1989–1998 Dodge RamDodge Ram
The Dodge Ram is a full-size pickup truck manufactured by the Chrysler Group LLC. As of late 2010, it has been sold under the Ram Trucks brand. Previously, Ram was part of the Dodge lineup of light trucks...
pickup truck, it quickly became a popular alternative to the large V8
V8 engine
A V8 engine is a V engine with eight cylinders mounted on the crankcase in two banks of four cylinders, in most cases set at a right angle to each other but sometimes at a narrower angle, with all eight pistons driving a common crankshaft....
gasoline engines normally used in full-size pickup trucks, while producing nearly double the torque at low engine speeds. The 6BT was also made popular for its fuel mileage over gasoline engine counterparts, roughly doubling fuel mileage in some applications.
The Dodge Ram was the only diesel pickup, during the time, that featured Direct Injection and didn't rely on glow plugs for cold weather start up.
The 1989–1993 Dodge Ram pickup engines were rated at 160 hp and 400 lbft. The fuel systems for these Dodge Rams featured Bosch injectors and Bosch VE mechanically controlled fuel injection pumps. Intercooler
Intercooler
An intercooler , or charge air cooler, is an air-to-air or air-to-liquid heat exchange device used on turbocharged and supercharged internal combustion engines to improve their volumetric efficiency by increasing intake air charge density through nearly isobaric cooling, which removes...
s were added 1991. In 1994 when Dodge introduced the completely restyled Ram, changes were made to the 6BT as well. The fuel systems for these Dodge Rams featured different Bosch injectors and a de-tuned Bosch P7100 mechanically controlled fuel injection pump. The 1994–1995 6BT was rated at 160 hp and 400 lbft when equipped with the 47RH automatic transmission, and 175 hp and 420 lbft when equipped with the NV4500 manual transmission. The 1996–1998 6BT was rated at 180 hp and 420 lbft when equipped with the 47RE automatic transmission, and 215 hp and 440 lbft when equipped with the NV4500 manual transmission.
California 6BT
The 6BT for 1996–1998 California Dodge Rams had the same ratings were 180 hp and 420 lbft regardless of transmission. These engines also featured EGR Valves to meet the California Nitric Oxide emissions. All the Dodge Ram 6BT engines had a compression ratioCompression ratio
The 'compression ratio' of an internal-combustion engine or external combustion engine is a value that represents the ratio of the volume of its combustion chamber from its largest capacity to its smallest capacity...
of 17.5:1. The EGR valve was dropped for the 24 valve ISB engines.
ISB
The 5.9 litre ISB (Interact System B) is one of the largest straight-six engines ever produced for light truck vehicles, and the improved high output 600 version was on the Ward's 10 Best EnginesWard's 10 Best Engines
Ward's 10 Best Engines is an annual list of the ten "best" automobile engines available in the U.S. market, that are selected by Ward's AutoWorld magazine. The list was started in 1994, and has been drawn every year since then....
list for 2004.
One unusual feature of the ISB is that it is a multi-valve
Multi-valve
In automotive engineering a multi-valve or multivalve engine is one where each cylinder has more than two valves. A multi-valve engine has better breathing and can operate at higher revolutions per minute than a two-valve engine, delivering more power.- Multi-valve rationale :A multi-valve design...
pushrod engine design. The engine displaces 5883 cc, with a 102.1 millimetres (4.02 in) cylinder bore and 119.9 millimetres (4.72 in) piston stroke. A turbocharger
Turbocharger
A turbocharger, or turbo , from the Greek "τύρβη" is a centrifugal compressor powered by a turbine that is driven by an engine's exhaust gases. Its benefit lies with the compressor increasing the mass of air entering the engine , thereby resulting in greater performance...
output in the high-compression (17.2:1 in recent versions) diesel. It is an all-iron engine with forged steel connecting rods, an assembled camshaft
Camshaft
A camshaft is a shaft to which a cam is fastened or of which a cam forms an integral part.-History:An early cam was built into Hellenistic water-driven automata from the 3rd century BC. The camshaft was later described in Iraq by Al-Jazari in 1206. He employed it as part of his automata,...
, and a cast aluminum intake manifold. The engine is produced in Columbus, Indiana
Columbus, Indiana
Columbus is a city in and the county seat of Bartholomew County, Indiana, United States. The population was 44,061 at the 2010 census, and the current mayor is Fred Armstrong. Located approximately 40 miles south of Indianapolis, on the east fork of the White River, it is the state's 20th largest...
.
The ISB uses electronically controlled Robert Bosch GmbH
Robert Bosch GmbH
Robert Bosch GmbH is a multinational engineering and electronics company headquartered in Gerlingen, near Stuttgart, Germany. It is the world's largest supplier of automotive components...
fuel systems, unlike the 6BT which were mechanical. Early ISB engines utilize Bosch injectors and a Bosch VP44 high pressure pump. Later ISB designs have common rail fuel injection, and once again utilized Bosch injectors and a Bosch CP3 high pressure pump.
QSB
The 5.9 litre QSB (Quantum System B) is the offroad, heavy duty, version of the ISB. Typically used in marine, agricultural, and construction applications, these engines share many of the same parts as the ISB and utilizing the Bosch/Case CAPS fuel system.Dodge Ram ISB
Midway through model yearModel year
The model year of a product is a number used worldwide, but with a high level of prominence in North America, to describe approximately when a product was produced, and indicates the coinciding base specification of that product....
1998, the Dodge Ram switched from the 6BT to the ISB to meet updated emissions requirements. Like other ISB's, these engines started out using the Bosch
Robert Bosch GmbH
Robert Bosch GmbH is a multinational engineering and electronics company headquartered in Gerlingen, near Stuttgart, Germany. It is the world's largest supplier of automotive components...
VP44 rotary injection pump. The VP44 setup meant that timing and fuel could be precisely controlled, which led to cleaner emissions. However, VP44 failure rates were very high versus the older P7100 injection pump. The compression ratio in these engines was 16.3:1. The 1998–2000 ISB was rated at 215 hp and 420 lbft when equipped with the 47RE automatic transmission
TorqueFlite
TorqueFlite is the trademarked name of Chrysler Corporation's automatic transmissions, starting with the three-speed unit introduced late in the 1956 model year as a successor to Chrysler's two-speed PowerFlite...
. The 1998 ISB was rated at 235 hp and 420 lbft when equipped with the manual transmission
Manual transmission
A manual transmission, also known as a manual gearbox or standard transmission is a type of transmission used in motor vehicle applications...
. The 1999–2000 ISB was rated at 235 hp and 460 lbft when equipped with a manual transmission. For the 2001–2002 model years, a standard output and high output ISB Cummins engine was offered. The standard output, which was the same as the previous engines was rated to 235 hp and 460 lbft when equipped with either a manual transmission or automatic. The high output ISB was rated at 245 hp and 505 lbft, and only a NV5600 six-speed manual transmission was offered behind it. The high output engine was different in a few ways from the standard output engine. The high output ISB had higher compression (17.1:1), powdered metal valve seat inserts and a larger flywheel
Flywheel
A flywheel is a rotating mechanical device that is used to store rotational energy. Flywheels have a significant moment of inertia, and thus resist changes in rotational speed. The amount of energy stored in a flywheel is proportional to the square of its rotational speed...
. The Bosch fuel system was reworked as well to allow increase fuel delivery and a slight increase in timing.
Dodge Ram ISB CR
For the 2003 model year, the Cummins was introduced with Bosch high pressure common railCommon rail
Common rail direct fuel injection is a modern variant of direct fuel injection system for petrol and diesel engines.On diesel engines, it features a high-pressure fuel rail feeding individual solenoid valves, as opposed to low-pressure fuel pump feeding unit injectors...
fuel injection, again increasing power output. On automatic equipped vehicles, the 47RE was upgraded internally to increase durability and torque
Torque
Torque, moment or moment of force , is the tendency of a force to rotate an object about an axis, fulcrum, or pivot. Just as a force is a push or a pull, a torque can be thought of as a twist....
capacity, now known as the 48RE. The 2003 rating for the Dodge truck was released at 305 horsepower (224 kW; 308 PS) and 555 foot-pounds (752 N·m). Midway through the 2004 model year, the Cummins 600 was introduced, producing 325 hp at 2,900 rpm and 600 lbft at 1,600 rpm. This high torque output gives the engine its name, and also offers a high specific output of 102 lbft per litre of displacement (1.67 ft·lbf/CID). A 610 version, new for the 2005 model year, pushed torque to 610 lbft. This engine was noticeably quieter than the previous engines.
3.9L/4BT
The 3.9L/4BT Cummins is an engine in the same family as the 5.9 litre Cummins turbodieselTurbodiesel
Turbodiesel refers to any diesel engine with a turbocharger. Turbocharging is the norm rather than the exception in modern car and truck diesel engines...
s. The 3.9L/4B is an inline four cylinder turbodiesel that was popular for many step van applications, including bread vans and other commercial vehicles. This engine is also used in various industrial, construction and agricultural applications. With a cylinder bore of 4.02 inches (10.2 cm) and a piston stroke of 4.72 inches (12 cm), the engine had a wet weight of 745 pounds (338 kg). In recent years it produced 130 hp and 355 lbft of torque. The 4BT today is also popular as a conversion engine among many light-duty pickup trucks that were originally equipped with gasoline engines. This is due to its high fuel efficiency while producing power comparable to the original light-duty gasoline engine. The 4BT engines have the same piston
Piston
A piston is a component of reciprocating engines, reciprocating pumps, gas compressors and pneumatic cylinders, among other similar mechanisms. It is the moving component that is contained by a cylinder and is made gas-tight by piston rings. In an engine, its purpose is to transfer force from...
s, connecting rod
Connecting rod
In a reciprocating piston engine, the connecting rod or conrod connects the piston to the crank or crankshaft. Together with the crank, they form a simple mechanism that converts linear motion into rotating motion....
s, valvetrain
Valvetrain
Valvetrain is an all-encompassing term used to describe the mechanisms and parts which control the operation of the valves. A traditional reciprocating internal combustion engine uses valves to control air and fuel flow into and out of the cylinders, facilitating combustion.-Layout:Valvetrain: The...
components, and injectors as their 6BT counterparts.
B6.7
The B6.7 is the latest version of the B Series. It is currently the largest straight-six engine produced for a light duty truck. It produces 350 hp and 650 lbft in the 2007.5 and newer DodgeDodge
Dodge is a United States-based brand of automobiles, minivans, and sport utility vehicles, manufactured and marketed by Chrysler Group LLC in more than 60 different countries and territories worldwide....
2500/3500 pickup trucks with the Chrysler-built six-speed 68RFE automatic transmission built at the Kokomo Transmission
Kokomo Transmission
Kokomo Transmission is a Chrysler automobile factory in Kokomo, Indiana. The factory opened in 1956.Historic products:* Chrysler 45RFE transmission* Chrysler 4RE transmission RWD* Chrysler 48RE transmission RWD* Chrysler 41TE transmission FWD...
plant in Kokomo, Indiana
Kokomo, Indiana
Kokomo is a city in and the county seat of Howard County, Indiana, United States, Indiana's 13th largest city. It is the principal city of the Kokomo, Indiana Metropolitan Statistical Area, which includes all of Howard and Tipton counties....
. Engine torque
Torque
Torque, moment or moment of force , is the tendency of a force to rotate an object about an axis, fulcrum, or pivot. Just as a force is a push or a pull, a torque can be thought of as a twist....
is slightly reduced with the Mercedes G56 6-speed manual transmission at 350 hp and 610 lbft. The 2007 and newer 3500 Cab & Chassis trucks only get the 305 hp and 610 lbft version of the B6.7, whether it has the Aisin AS68RC or the Mercedes G56 6-speed manual transmission. As for the 2008 4500/5500 medium duty Chassis Cabs or the Sterling Bullet Trucks, they will also receive the 305 hp and 610 lbft version of the B6.7, whether it has the Aisin AS68RC or the Mercedes G56 6-speed manual transmission. Late model 2011 Ram trucks produce 350 hp and 800 lbft, with the exhaust brake rating boosted from 150 hp to 222 hp.
There are many changes over the previous B5.9 for the Dodge truck, the most obvious being the larger displacement. The B6.7 had an increase of cylinder bore and piston stroke to 4.21 inches (10.7 cm) and 4.88 inches (12.4 cm) stroke, respectively, thereby giving a displacement of 408 cubic inch. It includes a cooled EGR system, variable geometry turbocharger
Variable geometry turbocharger
Variable-geometry turbochargers are a family of turbochargers, usually designed to allow the effective aspect ratio of the turbo to be altered as conditions change. This is done because optimum aspect ratio at low engine speeds is very different from that at high engine speeds...
, a new higher-pressure version of the Bosch
Robert Bosch GmbH
Robert Bosch GmbH is a multinational engineering and electronics company headquartered in Gerlingen, near Stuttgart, Germany. It is the world's largest supplier of automotive components...
direct-injection fuel system, and a particulate filter designed to reduce diesel particulate matter by more than 90%.
. Still, it retains 45% of the original 5.9 components.
The 6.7L base engine design proposal was led by Jerl Purcell and his team out of the Darlington, England Cummins facility. Jerl was instrumental in the development of the rear gear train ISB engine that resulted from the European Engine Alliance and is considered the Father of this engine layout. Cummins reduced development time and cost by 10%–15% using KIVA
KIVA (software)
KIVA is a family of Fortran-based Computational Fluid Dynamics software developed by Los Alamos National Laboratory . The software predicts complex fuel and air flows as well as ignition, combustion, and pollutant-formation processes in engines...
, a Computational Fluid Dynamics
Computational fluid dynamics
Computational fluid dynamics, usually abbreviated as CFD, is a branch of fluid mechanics that uses numerical methods and algorithms to solve and analyze problems that involve fluid flows. Computers are used to perform the calculations required to simulate the interaction of liquids and gases with...
code developed by Los Alamos National Laboratory
Los Alamos National Laboratory
Los Alamos National Laboratory is a United States Department of Energy national laboratory, managed and operated by Los Alamos National Security , located in Los Alamos, New Mexico...
, to develop its 6.7L diesel engine, which met 2010 emission standards as early as 2007. The 6.7L ISB engine was launched in the European EURO4 application and the Tier III off high-way application before being released in the Dodge Truck and US EPA medium duty automotive applications in January 2007.
The Dodge trucks' B6.7 competes head to head with V8 engine
V8 engine
A V8 engine is a V engine with eight cylinders mounted on the crankcase in two banks of four cylinders, in most cases set at a right angle to each other but sometimes at a narrower angle, with all eight pistons driving a common crankshaft....
s offered by General Motors
General Motors
General Motors Company , commonly known as GM, formerly incorporated as General Motors Corporation, is an American multinational automotive corporation headquartered in Detroit, Michigan and the world's second-largest automaker in 2010...
and Ford Motor Company
Ford Motor Company
Ford Motor Company is an American multinational automaker based in Dearborn, Michigan, a suburb of Detroit. The automaker was founded by Henry Ford and incorporated on June 16, 1903. In addition to the Ford and Lincoln brands, Ford also owns a small stake in Mazda in Japan and Aston Martin in the UK...
: the DMAX-manufactured Duramax, and the Navistar-manufactured 6.4 Power Stroke.
Both the B4.5 and B6.7 are used in DAF Trucks
DAF Trucks
DAF Trucks NV is a Dutch truck manufacturing company and a division of PACCAR. Its headquarters and main plant are in Eindhoven. Cabs and axle assemblies are produced at its Westerlo plant in Belgium...
' LF45, and LF55 and CF65 range respectively.
B6.7 Emission Control Issues
On January 27, 2010, the Houston, Texas-based law firm Craft Hughes Law filed a class action lawsuit in the United States District Court for the District of South Carolina (Greenville Division) alleging defects in the emission control system used in conjunction with the B6.7 engine in 2007–2010 Dodge trucks.Popular power ratings (B 6.7)
School bus @ 1,600 rpm, 200 hp electronically governed at 2,600 rpm @ 1,600 rpm, 220 hp electronically governed at 2,600 rpm @ 1,600 rpm, 240 hp electronically governed at 2,600 rpm @ 1,600 rpm, 240 hp electronically governed at 2,600 rpm @ 1,600 rpm, 260 hp electronically governed at 2,600 rpm @ 1,600 rpm, 280 hp electronically governed at 2,600 rpmUrban bus @ 1,300 rpm
Revolutions per minute
Revolutions per minute is a measure of the frequency of a rotation. It annotates the number of full rotations completed in one minute around a fixed axis...
, 200 hp electronically governed at 2,600 rpm @ 1,600 rpm, 220 hp electronically governed at 2,600 rpm @ 1,600 rpm, 240 hp electronically governed at 2,600 rpm @ 1,600 rpm, 260 hp electronically governed at 2,600 rpm @ 1,600 rpm, 280 hp electronically governed at 2,600 rpm