Nissan Diesel Motor Co., Ltd.

Akihito Okazaki

Ikurou Notsu

Masakazu Sasaki

Hideaki Gouda

Shougo Nishikawa

Mitsuhiro Nishina

Mistuhiro Nishina

A hybrid vehicle system comprises an engine (), a gearbox (), a clutch () for engaging or disengaging the gearbox () with or from the engine (), a rotating machine (), a power transmission mechanism () for transmitting the rotation of the rotating machine () to the gearbox, and a capacitor () for storing electric power supplied from the rotating machine (). A control unit () computes the drive force required by the vehicle, and determines the portion of output to be produced by the rotating machine () according to the stored energy in the capacitor () and the portion of output to be produced by the engine () so that the drive force requirement may be satisfied. The outputs from the rotating machine () and the engine () are controlled to obtain the determined portions of output, and a clutch () is then engaged.

Hybrid vehicle system

This system comprises an enginea transmission devicea clutchfor engaging/disengaging the enginewith/from the transmission devicea rotational electric devicea power transmission mechanismfor inputting the rotation of the rotational electric deviceto the transmission device, and an accumulator elementfor accumulating electrical power supplied by the rotational electric deviceA control unitdetermines a gear change instruction for the transmission deviceand if gear change instruction is determined, it disengages the clutchand controls the rotation of the rotational electric devicein such a manner that the rotational speed of the input shaft of the transmission device becomes a target rotational speed required for a gear changing operation.

A hybrid vehicle that is provided with an engine and a motor generator as power sources, includes a clutch which automatically engages or disengages to cause or interrupt rotation transmission between the output shaft of the engine and the input shaft of a transmission, a power transmission mechanism which transmits power between the input/output shaft of the motor generator and the input shaft of the transmission, and a hybrid control unit which selectively disengages the clutch and drives the motor generator. The clutch is disengaged according to running conditions, and the rotation speed of the motor generator is varied by the transmission to drive the vehicle. In this way, the region in which the motor generator operates efficiently is expanded, and fuel consumption by the hybrid vehicle is reduced.

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Ageo, Japan

Akihito Okazaki