Patent ID: 6301529
Filing Date: 2001-10-09
Classification: B60K,B60L,B60W,F01N,Y02A,Y02T,Y10S,Y10T

Abstract:
A driving apparatus for a hybrid vehicle, comprising:an engine;a motor/generator having its rotary axle linked to an output axle of the engine;a battery electrically connected to the motor/generator; anda controller programmed: to calculate a target driving force [tFd], the target driving force [tFd] representing a target value of a vehicular driving force; to calculate a basic target engine speed [tNinb] on the basis of the target driving force, the basic target engine speed [tNinb] representing a basic target value of the engine speed; to calculate a power generation request quantity [tWg], the power generation request quantity [tWg] representing a power to be generated by the motor/generator; to calculate a basic target engine torque [tTeg] on the basis of the target driving force [tFd], the power generation request quantity [tWg], and the basic target engine speed [tNinb], the basic target engine torque [tTeg] representing an engine torque to be developed when an output required for a vehicular drive and for a power drive of the motor/generator is developed at the basic target engine speed [tNinb]; to calculate a limit torque [tTlim] during an occurrence of a power generation request on the basis of the basic target engine speed [tNinb], the limit torque [tTlim] during the occurrence of the power generation request representing a limit torque of the engine when the engine is driven at the basic target engine speed [tNinb], satisfying a demand for an exhaust performance of the engine; to set a target engine speed [tNin] to either the basic target engine speed [tNinb] or value different from the basic target engine speed [tNinb] according to a result of comparison between the basic target engine torque [tTeg] and the limit torque [tTlim] during the occurrence of the power generation request; and to control the engine on the basis of the target engine speed [tNin].