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Electronic Constantly Variable Transaxle (ECVT)

Fig. 1: View of the ECVT transaxle — Justy

Fig. 2: View of the pulleys in the ECVT transaxle — Justy

The ECVT is used in the Justy. This transaxle combines a electronically controlled magnetic clutch with a variable transaxle that is driven by steel belt pulleys to provide high running performance, low fuel consumption and ease of control.

The transaxle is controlled by a microcomputer which constantly monitors engine speed, vehicle speed and throttle position. It uses these signals to control the magnetic clutch. The magnetic clutch controls the width of the drive pulley faces and thus provides the shifting effect.

The power from the transaxle is transmitted through a special steel belt that runs between 2 variable pulleys, as the power is transmitted from the engine through the transaxle, the control computer varies the space between the pulleys depending on engine load, vehicle speed and throttle position. The varying of the pulleys allows the belt to ride in a constantly changing space, this has the effect of a continuous gear change.

The overall driving effect of the ECVT is very smooth. The constant adjustment of the pulleys means that the transaxle works more efficiently to transmit power to the drive wheels.

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