US 8,783,390 B2Granted

Vehicle drive apparatus

AssigneeToyota Jidosha Kabushiki Kaisha

InventorsYoshinori Maeda, Akihiro Hosokawa, Yousuke Suzuki, Michitaka Tsuchida, Kazuya Okumura, Tadahiro Oshiumi, Kensuke Yoshizue, Koji Sugiyama

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Abstract

A vehicle drive apparatus independently controls drive forces for a front-right drive wheel, a front-left drive wheel, a rear-right drive wheel, and a rear-left drive wheel using a front-right electric motor, a front-left electric motor, a rear-right electric motor, and a rear-left electric motor, respectively. The drive forces for the drive wheels of a vehicle incorporating the vehicle drive apparatus are determined based on the target moments in the yaw and roll directions of the vehicle, the total drive for the drive wheels, and the drive reaction forces at the drive wheels. Thus, the performance desired by the driver can be achieved, and the drivability therefore improves accordingly.

Claims21

Dependent claims

A vehicle drive apparatus for a vehicle that can provide different drive forces at at least a pair of left and right drive wheels, respectively, comprising:

a controller configured to determine drive forces that drive the left and right drive wheels by simultaneously solving an expression including a relation between a target moment required in a yaw direction of the vehicle and the drive forces for the drive wheels, a relation between a target moment required in a roll direction of the vehicle and drive reaction forces at the drive wheels, a total drive force for the drive wheels which is the sum of drive forces that drive the left and right drive wheels, and a front-rear distribution ratio of the total drive force,
wherein the expression is simultaneously solved so the drive forces that drive the left and right drive wheels achieve both the target moment required in the yaw direction of the vehicle and the target moment required in the roll direction of the vehicle.

Dependencies are inferred from the claim text.

Facts

Application: 12/295,336Filed 21 Jun 2007
Priority: JP 2006-17315622 Jun 2006
Published: US 2009/0108671 A130 Apr 2009
Granted: 22 Jul 2014
Term ends: Not estimatedThe source records don’t support an estimate.

Classification24 codes

B60K 17/356
For driving both front and rear wheels, e.g. four wheel drive vehicles: having fluid or electric motor, for driving one or more wheels
B60G 7/008
Pivoted suspension arms; Accessories thereof: attaching arms to unsprung part of vehicle
B60G 17/0195
The regulating means comprising electric or electronic elements: characterised by the regulation being combined with other vehicle control systems
B60G 21/051
Between wheels on the same axle but on different sides of the vehicle, i.e. the left and right wheel suspensions being interconnected: trailing…