Honda Motor Co., Ltd.

Takashi Kon

Mahito Shikama

Hideharu Takamiya

Akio Futatsudera

Toshimi Kaneko

Atsuhiro Miyauchi

Kazuhiko Imamura

Hirofumi Hara

Yoshinori Andou

A hybrid electric vehicle drive apparatus has a setting portion for setting a limit value of a driving torque that a motor outputs when driving a hybrid electric vehicle by the power of the motor only, based on a maximum torque that the motor enables to output and a starting torque used to start an internal combustion engine by the motor. The setting portion sets the limit value to a first value and sets the limit value to a second value which is greater than the first value when a vehicle speed of the vehicle does not increase even though an accelerator pedal position degree increases while the vehicle is being driven only by the motor.

Hybrid electric vehicle drive apparatus

When an engine load QC is equal to or larger than a predetermined value, an acceleration-state determiner determines that a turbine is in an acceleration state, and a supercharging-pressure-control-state determiner determines that supercharging-pressure controller (a bypass valve, a wastegate, and a variable flap) of a turbocharger are in a maximum supercharging pressure control state (a closed valve state), i.e., when a delay coefficient &#x3b1; of the turbocharger calculated by a delay-coefficient calculator on the basis of an actual supercharging pressure &#x3c0;c and a convergent value &#x3c0;c* of a supercharging pressure calculated by a convergent-value calculator indicates a value peculiar to the turbocharger, a failure of the supercharging-voltage controller is determined on the basis of the delay coefficient &#x3b1;. Thus, it is possible to secure a high failure detection accuracy, and increase a frequency of performing failure detection even when the engine load QC suddenly changes to cause a delay in a response of the supercharging pressure &#x3c0;c.

Failure detecting device for supercharging-pressure control means in supercharging device of engine

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Wako, Japan

Takashi Kon