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240 Landmarks TopTransmission and Drive Train > Smoother-E Autoshift (electronically controlled automated manual transmission)
 Smoother-E Autoshift (electronically controlled automated manual transmission)
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This is an electronically controlled automated manual transmission that combines a fluid coupling, hydraulic control unit, wet multi-plate clutch, manual transmission, and electromagnetic gear shift unit.
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Storage location:ISUSZU MOTORS LIMITED
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Year manufactured:2004
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Manufacturer:Isuzu Motors Limited
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Classification:-
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Current status:-
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Name / Manufacture
Model name:MYY-5A
MYY-6P
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Company name:Isuzu Motors Limited
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Applied model:Isuzu Elf (NKR/NPR)
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Year of manufacture:2004
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Application year:2004
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Specification
Shift / operation method:Automatic
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Transmission type:Fluid coupling
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Speeds:5 forward speeds, 1 reverse speed
6 forward speeds, 1 reverse speed
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Gear ratio (forward):5-speed: 5.315/2.908/1.558/1.000/0.721
6-speed: 5.979/3.434/1.862/1.297/1.000/0.774
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Gear ratio (reverse):5-speed: 5.068
6-speed: 5.701
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Operation method:Shift lever type
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Potency
Structure, type, measure, means, etc.:This is an electronically controlled automated manual transmission that combines a fluid coupling, hydraulic control unit, wet multi-plate clutch, manual transmission, and electromagnetic gear shift unit.
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Function, effect, etc.:The Smoother-E Autoshift uses the creep force of the fluid coupling to allow the vehicle to be started smoothly. No clutch maintenance is required due to the wet multi-plate clutch. It is capable of automatic shifting and sequential manual shifting.
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Features:A new fluid coupling automatic transmission was developed as a new AMT system for increased efficiency and to make driving of commercial vehicles easier.
Lockup of the fluid coupling at low speeds ensured fuel economy similar to a manual transmission. Maintenance costs were reduced because the transmission did not require clutch replacement, thus ensuring excellent economic performance.
Manual shift operation was electronically controlled using a new electromagnetic solenoid gear shift unit. Automatic shift up and down dramatically reduced driver burden and suppressed variations caused by differences in driving operation. As a result, this transmission allowed the vehicle to save fuel in a stable manner.

Product features
Conventional manual shift operation (gear selection by gear shift/selection) was electronically controlled by the new electromagnetic solenoid gear shift unit. It had an additional sequential manual mode shift function activated by operating the gear lever in the +/- directions, so that the operation mode could be selected according to the driving situation.
Moreover, low speed performance, which was the weakness of conventional dry clutch AMTs, was overcome using the creep force generated by the fluid coupling.
The transmission has the following two main features.
(1) Automatic shift mode selection with an automatic shift up/down function to improve fuel efficiency and makes the vehicle easier to drive using two pedals.
(2) Single operation of the +/- switch allows sequential manual shifting suitable for commercial vehicles.
Economic performance
Fuel efficiency equivalent to MT was realized by lockup of the fluid coupling from low vehicle speed, and maintenance costs were reduced because clutch replacement is not necessary. As a result, excellent economic performance was obtained. Additionally, automatic shift up/down after selecting the automatic shift mode suppressed variations caused by differences in driving operation, allowing the vehicle to save fuel in a stable manner.
Easy drive
This transmission was developed to dramatically reducing driver burden to improve safety, make the vehicle more eco-friendly, and allow the driver to concentrate on driving. To accomplish this, unlike a conventional manual transmission, the Smoother-E Autoshift enabled operation using just two pedals at all times, and automatic shifting.
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