1985 ISUZU ASKA (NAVI5 transmission) Adhttp://www.jsae.or.jp/autotech/data_e/8-6e.htmlThis device was the world's first electronically controlled automatic 5-speed transmission (named the NAVI-5) developed by Isuzu for full mass production. It used a conventional manual transmission and a dry single disc clutch. The driving operation and experience of veteran drivers were analyzed in terms of ergonomics, and the system replaced most operations usually performed by the hands and feet with an electro-mechanical system. In some cases it performed these operations more sophisticatedly than people could.
1. Automatic or manual shifting could be selected.
In the automatic shift mode, a series of operations was controlled automatically by the control unit (ECU), from intermittent clutch engaging and selection of the optimal gear to the throttle operations on shifting and speed change. The transmission performed shift operations similar to a manual transmission vehicle by actively operating the shift lever (double clutch operation, etc.), and drivers could enjoy driving as if they were a professional.
2. Good fuel efficiency without variations
Due to constant optimal control by ECU, fuel efficiency varied less according to the driver's technique. Normal drivers could obtain almost the same fuel efficiency performance as a veteran.
3. Easy even for novice drivers to easily drive a manual vehicle
Even a novice driver could easily and steadily operate a car with this system because the transmission had the same shift patterns as a manual vehicle but only required a light shifting force. If a mis-shift occurred due to driver error, the ECU protected the system to allow the vehicle to be driven safely.
4. Less creep and high safety
Unlike torque converter type automatic transmissions, this system blocked power completely with the clutch to prevent creep. Accordingly, it was possible to reduce accidents caused by carelessness.
5. Push-start made possible for automatic vehicles
The engine could be started by push-start, which had been impossible for automatic transmissions. This made it less likely that the vehicle would become inoperable.
6. Other features included HSA and auto cruise. Although it was an integrated system, it had high reliability and durability using various new technologies in its hardware and software.