Control device for vehicular drive apparatus

Details Control device for vehicular drive apparatus Control device for vehicular drive apparatus

2006-06-22

2011-10-18

Wright, Dirk (Department: 3655)

Interrelated power delivery controls, including engine control

Plural engines

Electric engine

Reexamination Certificate

active

08038571

ABSTRACT:
A control device is provided for a vehicular drive apparatus, having a differential mechanism and a transmission, for miniaturizing the differential mechanism and/or providing improved fuel economy while preventing a busy shift. With the provision of a switching clutch C0or a switching brake B0, a transmitting mechanism10can be placed in a continuously variable shifting state and a step-variable shifting state whereby the vehicular drive apparatus has combined advantages including a fuel saving effect of the transmission, enabled to electrically change a gear ratio, and a high transmitting efficiency of a gear type transmitting device enabled to mechanically transmit drive power. With a total speed ratio γ T set to a lower vehicle speed gear ratio than that for a given running state, if a required drive force or a drive force source brake is unavailable or if load torque of an electric motor is deviated from an allowable range, switching control mean50switches a differential portion11to the step-variable shifting state for thereby obtaining larger drive force or drive force source brake than those for the given running state without causing load torque of the electric motor from deviating from the allowable range while preventing the busy shift.

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