US 2021/0268911 A1Published application

Four-wheel-drive vehicle

AssigneeToyota Jidosha Kabushiki Kaisha

InventorsAtsushi TABATA, Koichi OKUDA, Masato NAKANO, Yuki MAKINO

Life of this patent

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Abstract

A regenerative torque upper limit is set to a larger value when a rear-wheel distribution ratio is small than when the rear-wheel distribution ratio is large. Accordingly, when a distribution of a drive power to front wheels is large, a regenerative torque of a second rotary machine can be increased such that wheels are less likely to slip at the time of performing of regeneration control when the distribution of the drive power to the front wheels is small in comparison with a case in which the regenerative torque upper limit is set to a constant value similarly to when the distribution of the drive power to the front wheels is small. In this way, it is possible to increase the regenerative torque of the second rotary machine according to the rear-wheel distribution ratio.

Claims6

Dependent claims

A four-wheel-drive vehicle comprising:

a drive power source configured to include at least a rotary machine;
a drive power distribution device configured to transmit a drive power from the drive power source to main driving wheels and sub driving wheels and to adjust a main-side distribution ratio which is a ratio of a drive power which is transmitted to the main driving wheels to a total drive power which is transmitted from the drive power source to the main driving wheels and the sub driving wheels;
and
a control device configured to control the rotary machine and the drive power distribution device,
wherein the control device is configured to perform regeneration control using the rotary machine at the time of deceleration of the vehicle, to limit a regenerative torque of the rotary machine using a preset upper limit of the regenerative torque in the regeneration control, and to set the upper limit to a value which is larger when the main-side distribution ratio is small than when the main-side distribution ratio is large.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/248,683Filed 3 Feb 2021
Priority: JP 2020-03244927 Feb 2020
Published: 2 Sep 2021
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

B60L 7/18
Dynamic electric regenerative braking: controlling the braking effect
B60L 50/15
Using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines: with additional electric power supply
B60L 7/26
With additional mechanical or electromagnetic braking: controlling the braking effect
B60L 15/2009
For control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed: for braking

Family

US 11,932,137 B2Related patent
US 2021/0268911 A1This patent

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

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