초록 ▼

Fluctuations in rotating speed or in toque at the time of switching between series drive and parallel drive operations are prevented. When switching from series drive mode to parallel drive mode, the rotating speed Nb of a motor B is detected and a rotating speed command is transmitted to match the

Fluctuations in rotating speed or in toque at the time of switching between series drive and parallel drive operations are prevented. When switching from series drive mode to parallel drive mode, the rotating speed Nb of a motor B is detected and a rotating speed command is transmitted to match the rotating speed Na of a motor A with the rotating speed Nb of the motor B. When the actual rotating speed Na of the motor A has become equal to the rotating speed Nb of the motor B, a torque command which causes torque Teg of an engine to become zero is transmitted and, then, a command for engaging a lock-up clutch is transmitted. When switching from the parallel drive mode to the series drive mode, the engine torque is gradually reduced and the motor B is controlled to output a torque corresponding to the amount of reduction in the engine torque. The rotating speed Na of the motor A is matched with the rotating speed Nb of the motor B and the lock-up clutch is disengaged when the engine torque has become zero.

대표청구항 ▼

[What is claimed is:] [1.]a first motor (A) interposed between said output shaft and said lockup clutch and electrically connected to said battery for generating an auxiliary electric energy and for returning thereof to said battery when said lockup clutch is released while said vehicle is running i

[What is claimed is:] [1.]a first motor (A) interposed between said output shaft and said lockup clutch and electrically connected to said battery for generating an auxiliary electric energy and for returning thereof to said battery when said lockup clutch is released while said vehicle is running in a series running mode;a second motor (B) interposed between said first motor (A) and said transmission and electrically connected to said battery for assisting said engine when said lockup clutch is connected while said vehicle is running in a parallel running mode;a planetary gear interposed between said lockup clutch and said second motor (B) for alternatively and effectively using said motors (A) and (B) so as to be changeable to a motor or a generator as required; andelectronic hybrid engine control means responsive to said accelerator signal, said brake signal, said ON signal for connecting said lockup clutch after setting said driving force to substantially zero in addition to making an r.p.m. of said first motor (A) to coincide with an r.p.m. of said secondmotor (B) when a driving condition is transiting from said series running mode to said parallel running mode and for disconnecting said lockup clutch after making said r.p.m. of said first motor (A) to coincide with said r.p.m. of said second motor by gradually increasing said r.p.m. of said second motor (B) at the time of when said driving force becomes substantially zero by incrementally adding a driving torque of said second motor (B) as much as a decreased torque of said engine when said driving condition is transiting from said parallel running mode to said series running mode in addition to gradually decreasing said driving force.