US 9,434,377 B2Granted

Hybrid drive device

AssigneesAisin Seiki Kabushiki Kaisha, Aisin Aw Co., Ltd.

InventorsYoshitomi Haneda, Yasuhiro Ishihara, Yoshinori Ono, Masaki Nomura, Shiko Yoshimura, Shigeki Takami, Tomoo Atarashi, Takafumi Koshida

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Abstract

A hybrid drive device has a clutch connecting and disconnecting an output shaft and an input shaft, a first motor generator that rotates in conjunction with the rotation of the input shaft, an allowable clutch heat generation amount calculation portion that calculates the allowable clutch heat generation amount, an allowable differential clutch rotation speed calculation portion which calculates the allowable differential clutch rotation speed for when engagement starts, on the basis of the allowable clutch heat generation amount, and a motor generator rotation control portion that controls the rotation speed of the first motor generator such that the differential clutch rotation speed when engagement starts and during engagement is no more than the allowable differential clutch rotation speed when engagement starts.

Claims4

Dependent claims

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.

8 more elements

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;
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;
and
a target input shaft rotation speed calculating means which calculates a target input shaft rotation speed which corresponds to a target rotation speed of the input shaft under the clutch being in engagement based on the allowable clutch difference rotation speed at the start of engagement and the target clutch synchronizing time which is the target elapsed time from the start of engagement of the clutch to the completion of synchronization of the output shaft and the input shaft, wherein the motor/generator rotation control means controls the rotation speed of the motor/generator so that the rotation speed of the input shaft under the clutch being in engagement becomes equal to or less than the target input shaft 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 target input shaft rotation speed calculating means calculates the target input shaft rotation speed so that the target input shaft rotation speed becomes zero upon an elapse of the target clutch synchronizing time from the start of engagement of the clutch by gradually decreasing with time and the motor/generator rotation control means controls the rotation speed of the motor/generator so that the rotation speed of the input shaft under the clutch being in engagement becomes the target input shaft rotation speed.

9 more elements

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 relationship between the allowable clutch difference rotation speed and the elapsed time from the start of engagement of the clutch is a direct function in which the allowable clutch difference rotation speed gradually decreases as the elapsed time increases.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/418,685Filed 26 Jul 2013
Priority: JP 2012-1718532 Aug 2012
Published: US 2015/0203104 A123 Jul 2015
Granted: 6 Sep 2016
Term ends: Not estimatedThe source records don’t support an estimate.

Classification20 codes

B60W 20/40
Control systems specially adapted for hybrid vehicles: controlling the engagement or disengagement of prime movers, e.g. for transition between…
B60K 6/445
Series-parallel type: differential gearing distribution type
B60K 6/48
Characterised by the architecture of the hybrid electric vehicle: parallel type
B60L 50/16
Using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines: with provision for separate direct…

Family

US 2015/0203104 A1Pre-grant publication · published 23 Jul 2015
US 9,434,377 B2This patent

From the US filing history. Foreign family members aren’t listed.

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