Patent ID: 9434377
Filing Date: 2016-09-06
CPC Classification: B60K,B60L,B60W,Y02T,Y10S

Claim Text:
1. A hybrid drive device comprising: an engine which outputs a rotation drive force to an output shaft; an input shaft which is rotated in association with a rotation of a drive wheel; a clutch disposed between the output shaft and the input shaft for connecting or disconnecting the output shaft and the input shaft; a motor/generator which is rotated in association with a rotation of the input shaft; an allowable clutch heat generation amount calculating means for calculating an allowable clutch heat generation amount which corresponds to a heat generation amount that the clutch can allow under the clutch being in engagement; a motor/generator rotation control means for controlling a rotation speed of the motor/generator not to exceed the allowable clutch heat generation amount calculated by the allowable clutch heat generation amount calculating means; and an allowable clutch difference rotation speed calculating means for calculating an allowable clutch difference rotation speed which corresponds to a difference rotation speed between the output shaft and the input shaft based on the allowable clutch heat generation amount, wherein the motor/generator rotation control means controls the rotation speed of the motor/generator so that a clutch difference rotation speed which corresponds to the difference rotation speed between the output shaft and the input shaft becomes equal to or less than the allowable clutch difference rotation speed; wherein the allowable clutch difference rotation speed calculating means calculates the allowable clutch difference rotation speed at a start of engagement which corresponds to the difference rotation speed between the output shaft and the input shaft at the start of engagement of the clutch and the motor/generator rotation control means controls the rotation speed of the motor/generator so that the clutch difference rotation speed at the start of engagement which corresponds to the difference rotation speed between the output shaft and the input shaft at the start of engagement of the clutch becomes equal to or less than the allowable clutch difference rotation speed at the start of engagement; and wherein the allowable clutch difference rotation speed calculating means calculates the allowable clutch difference rotation speed at the start of engagement based on the allowable clutch heat generation amount, a friction torque of the engine, an inertia of the engine and a target clutch synchronizing time which is a target elapsed time from the start of engagement of the clutch to a completion of synchronization of the output shaft and the input shaft.