Multimode manual transmission - AbsoluteAstronomy.com

Multimode Manual Transmission (MMT or M/M, also Multimode Transmission) is a type of sequential manual transmission

Sequential manual transmission

A sequential manual transmission is a type of manual transmission used on motorcycles and high-performance cars for auto racing, where gears are selected in order, and direct access to specific gears is not possible....

offered by Toyota. It uses a traditional manual gearbox with an electronically controlled clutch

Clutch

A clutch is a mechanical device which provides for the transmission of power from one component to another...

. Multimode Manual Transmission is available in the Aygo, Yaris

Yaris

Yaris may refer to one of three Toyota Yaris related items:*Toyota Vitz, also sold as the Toyota Yaris hatchback*Toyota Belta, also sold as the Toyota Yaris sedan*Yaris , a video game promoting the Toyota models...

and Auris

Auris

Auris, dative and ablative form of Aurum, meaning "gold" or same nominative, genitive and vocative form, meaning "ear" in Latin, can refer to any of the following:* Auris, Isère, a town in France* Toyota Auris...

in Europe

Europe

Europe is, by convention, one of the world's seven continents. Comprising the westernmost peninsula of Eurasia, Europe is generally 'divided' from Asia to its east by the watershed divides of the Ural and Caucasus Mountains, the Ural River, the Caspian and Black Seas, and the waterways connecting...

, and should not be confused with Multimode Automatic Transmission, which is offered in the North American market by Toyota.

Operation

The Multimode Manual Transmission has the following gears: R, N, E, M+, M-.

R: R is the reverse gear. It is similar to R in both traditional manual and in full automatic cars.

N: N is the neutral gear. It is similar to N in both traditional manual and full automatic.

E: E is the functional equivalent of D in a full automatic. As the gearbox in a MMT car is a manual gearbox, instead of one with a torque converter
Torque converter
In modern usage, a torque converter is generally a type of hydrodynamic fluid coupling that is used to transfer rotating power from a prime mover, such as an internal combustion engine or electric motor, to a rotating driven load...

as in a traditional automatic, gear changes are noticeable. The accelerator
Accelerator
- In computing :*Download accelerator, or download manager, software dedicated to downloading*Hardware acceleration, the use of dedicated hardware to perform functions faster than a CPU...

should be eased off slightly when gear changes to produce a smooth ride.

M- : Downshifts a gear in sequential fashion, from M5 (M6 in 6-speed MMT cars) to M1.

M+: Up-shifts a gear in sequential fashion, from M1 to M5 (M6 in 6-speed MMT cars).

Differences from an automatic car

A Multimode manual car has a clutch

Clutch

A clutch is a mechanical device which provides for the transmission of power from one component to another...

instead of a torque converter. As such, gear changes are noticeable, and the car rolls backwards when on an up-sloping incline.

Creeping: A Multimode Manual Car creeps forward when the brake pedal is released and accelerator is not depressed, like an automatic car. This is achieved via partially engaging and slipping the clutch.

Moving off from an incline: A MMT car rolls backwards when on an up-sloping incline, unlike an automatic car. To move off from an up-slopping incline, apply handbrake before depressing the accelerator slightly. Do not hold the car on an incline by depressing the accelerator pedal, as the slipping clutch will overheat and lead to clutch damage.

Parking: Unlike an automatic car, the P gear is absent in a MMT car. The car should be parked in the following fashion. In an up-slopping incline, put the gear to M1, or E, apply handbrake, and switch off the engine. In a down-slopping incline, put the gear to R, apply handbrake, and switch off the engine. On level ground, put the gear to R, apply handbrake, and switch off the engine. R or E/M1 substitute the P function in a full automatic.

Moving off from Park: The engine can only be started with the gear in N. To start, switch on the car to ON position (this releases the gear lock), depress brake pedal, put the gear to N (from either R or E/M1), and switch on the engine.

L/1 and 2 gears in a full automatic: The MMT does not provide L/1 and 2 gears as in a full automatic. One action of the MMT system is that it detects the gradient of the slope that the car is situated in. On a down-slopping incline and if the brake pedal is depressed, it automatically selects a lower gear to produce engine brake, which has the equivalent effect of L and 2 gears in a full automatic. L and 2 can also be substituted with E1 and E2 (not available in Aygo) or M1 and M2 gears in a MMT car. To select E1 or E2, put the gear to E, and use + and - pedal flaps on the steering wheel to override the computer selection. E will change to E1/E2/E3/E4/E5/E6, depending on the gear selected. Downshift to E1 or E2 as appropriate to simulate L and 2 gears in a full automatic. To select M1 or M2, put the gear to M, and use M- gear to downshift the gear to M1 or M2.

Kick-down: In E mode, the kick-down function in a full automatic can be similarly activated in an MMT car. Additionally, the kick-down function can be manually activated using the - pedal flap on the steering wheel
Steering wheel
A steering wheel is a type of steering control in vehicles and vessels ....

in E mode. This overrides the computer setting and E changes to E1/E2/E3/E4/E5/E6. To stop the manual override
Manual override
A manual override is a mechanism wherein control is taken from an automated system and given to the user. For example, a manual override in photography refers to the ability for the human photographer to turn off the automatic aperture sizing, automatic focusing, or any other automated system on...

under E mode, pull and hold the + flap on the steering wheel, until the E1/E2/E3/E4/E5/E6 changes back to E. Alternatively, wait for the next computer activated gear change.

Reverse: The car reverses as in an automatic car. To reverse, depress brake pedal, and change the gear to R. Gradually lift off the brake pedal to allow the car to creep backwards. On a down-slopping incline, the creep function, simulated using the slipping clutch, is not sufficient to prevent the car from rolling forward. In this case, the car must not be held still using the accelerator pedal, as the excessive clutch slipping will lead to clutch damage. Handbrake should be instead applied, and the accelerator pedal should be depress slightly.

Gear change: The gear change in MMT is noticeable, unlike in a full automatic car. Under E gear, the car will automatically change the gear depending on speed and gradient
Gradient
In vector calculus, the gradient of a scalar field is a vector field that points in the direction of the greatest rate of increase of the scalar field, and whose magnitude is the greatest rate of change....

information. It is recommended that the accelerator pedal should be momentarily lifted off during gear change. A constant throttle can also be maintained on the accelerator, and gear change can still occur, although the car will feel noticeably more jerky during gear change than in a full automatic.

Operation under E mode

The E mode functions as the D gear in a full automatic car. Via the on board computer and electronic clutch, the car automatically selects the appropriate gear based on speed and gradient information. An MMT car limits the highest gear selectable, if the gradient is steep.

L and 2 gear in a full automatic: The L and 2 gear in automatic can simulated in an MMT car by either using E1/E2 or M1/M2.

Es mode: Es mode allows more dynamic and sporty driving with faster gear changes, at the expense of greater fuel consumption. Es mode is available in the Yaris
Yaris
Yaris may refer to one of three Toyota Yaris related items:*Toyota Vitz, also sold as the Toyota Yaris hatchback*Toyota Belta, also sold as the Toyota Yaris sedan*Yaris , a video game promoting the Toyota models...

and Auris
Auris
Auris, dative and ablative form of Aurum, meaning "gold" or same nominative, genitive and vocative form, meaning "ear" in Latin, can refer to any of the following:* Auris, Isère, a town in France* Toyota Auris...

(in Europe). Es mode is similar to the S mode in Direct-Shift Gearbox
Direct-Shift Gearbox
The Direct-Shift Gearbox , commonly abbreviated to DSG, is an electronically controlled dual clutch multiple-shaft manual gearbox, in a transaxle design - without a conventional clutch pedal, and with full automatic, or semi-manual control...

.

Operation under M mode

Under M mode, sequential gear shifts can be made by changing the gear to M+ and M-. Under M mode, the gear selected will be displayed as one of M1/M2/M3/M4/M5/M6 on the dashboard

Dashboard

A dashboard is a control panel placed in front of the driver of an automobile, housing instrumentation and controls for operation of the vehicle....

. Under M mode, the gear will not change even if the engine revolution reaches the red-zone, which will lead to engine damage. However, the user is prevented from excessively downshifting to a gear that exceeds the maximum revolution possible for the engine, or excessively up-shifting to a gear that may lead the engine to stall. When the car is braked to a complete stop, the M1 gear is automatically selected.

Competitors

Operationally similar systems are the Direct-Shift Gearbox

Direct-Shift Gearbox

The Direct-Shift Gearbox , commonly abbreviated to DSG, is an electronically controlled dual clutch multiple-shaft manual gearbox, in a transaxle design - without a conventional clutch pedal, and with full automatic, or semi-manual control...

offered by Volkswagen AG and I-SHIFT

Honda I-SHIFT

The Honda I-SHIFT is a 6-speed semi-automatic transmission . Honda’s I-SHIFT only debuted recently on the European market Honda Civic hatchback, pairing it with the 1.4 i-VTEC and 1.8 i-VTEC engines...

offered by Honda

Honda

is a Japanese public multinational corporation primarily known as a manufacturer of automobiles and motorcycles.Honda has been the world's largest motorcycle manufacturer since 1959, as well as the world's largest manufacturer of internal combustion engines measured by volume, producing more than...

. Other technologies that produce automatic transmissions are the conventional automatic transmission

Automatic transmission

An automatic transmission is one type of motor vehicle transmission that can automatically change gear ratios as the vehicle moves, freeing the driver from having to shift gears manually...

and continuously variable transmission

Continuously variable transmission

A continuously variable transmission is a transmission that can change steplessly through an infinite number of effective gear ratios between maximum and minimum values. This contrasts with other mechanical transmissions that offer a fixed number of gear ratios...

. For example, continuously variable transmission

Continuously variable transmission

is implemented as the MultiDrive S in Toyota iQ

Toyota iQ

The Toyota iQ is a city car introduced at the 2008 Geneva Auto Show, with Japanese sales having begun in October 2008 and European sales in January 2009. The production iQ followed a concept vehicle presented at the 2007 Frankfurt Auto Show. A North American version of the iQ, branded as the Scion...

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