Hybrid drive system wherein clutch is engaged when engine...

Details Hybrid drive system wherein clutch is engaged when engine... Hybrid drive system wherein clutch is engaged when engine...

2007-04-24

2007-04-24

Bottorff, Christopher (Department: 3618)

Motor vehicles

Power

Electric

C180S065800, C701S022000

Reexamination Certificate

active

10970983

ABSTRACT:
A hybrid vehicle drive system including (a) an engine, (b) an electric motor, (c) a planetary gear device having a first rotary element connected to the engine, a second rotary element connected to the electric motor and connected through a first clutch to an output member connected to vehicle drive wheel, and a third rotary element connected through a second clutch to the output member, (d) a forward-motor-drive control device for engaging the first clutch and releasing the second clutch to thereby establish a forward motor drive mode in which the vehicle is driven in a forward direction by the electric motor, (e) a forward-engine-drive control device for engaging at least the second clutch to establish an engine-drive mode in which the vehicle is driven in the forward direction by the engine, and (f) a second-clutch control device operable upon switching of a vehicle drive mode from the forward motor drive mode to the forward engine drive mode, for engaging the second clutch only after the engine speed has exceeded the motor speed.

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