Controller of vehicle and vehicle

Patent metadata

Field	Value
Publication number	US-9822829-B2
Application number	US-201615381860-A
Country	US
Kind code	B2
Filing date	Dec 16, 2016
Priority date	Jan 13, 2016
Publication date	Nov 21, 2017
Grant date	Nov 21, 2017

Abstract

A controller including an electronic control unit, the electronic control unit is configured to determine at least one of whether a first absolute value is at least equal to a first threshold and whether a second absolute value is at least equal to a second threshold. When the electronic control unit determines that at least one of the first absolute value and the second absolute value is at least equal to the corresponding threshold, torque capacity of an automatic clutch is controlled such that the automatic clutch is brought into a slipping state. The first absolute value is an absolute value of rotational acceleration of an input shaft of a transmission, and the second absolute value is an absolute value of rotational acceleration of drive wheels.

First claim

What is claimed is:

1. A controller for a vehicle,
the vehicle including
an engine,
drive wheels, and
an automatic clutch and a transmission interposed in a power transmission route between the engine and the drive wheels,

the controller comprising
an electronic control unit configured to:
i) control torque transmitted between the engine and the transmission;
ii) determine at least one of whether a first absolute value is at least equal to a first threshold and whether a second absolute value is at least equal to a second threshold;
the first absolute value being an absolute value of rotational acceleration of an input shaft of the transmission, and the second absolute value being an absolute value of rotational acceleration of the drive wheels; and
iii) control torque capacity of the automatic clutch such that the automatic clutch is brought into a slipping state, when the electronic control unit determines that at least one of the first absolute value and the second absolute value is at least equal to an corresponding threshold.

2. The controller according to claim 1 , wherein
the electronic control unit is configured to
maintain the torque capacity of the automatic clutch at limited torque capacity until at least one of the first absolute value and the second absolute value becomes smaller than the corresponding threshold, when the electronic control unit determines at least one of the first absolute value and the second absolute value is at least equal to the corresponding threshold.

3. The controller according to claim 1 , wherein
the electronic control unit is configured to select at least one of the first threshold and the second threshold from plural types of thresholds in accordance with an actual gear stage of the transmission.

4. A vehicle comprising:
an engine;
drive wheels;
an automatic clutch and a transmission interposed in a power transmission route between the engine and the drive wheels; and
an electronic control unit configured to:
i) control torque transmitted between the engine and the transmission;
ii) determine at least one of whether a first absolute value is at least equal to a first threshold and whether a second absolute value is at least equal to a second threshold,
the first absolute value being an absolute value of rotational acceleration of an input shaft of the transmission, and the second absolute value being an absolute value of rotational acceleration of the drive wheels; and
iii) control torque capacity of the automatic clutch such that the automatic clutch is brought into a slipping state, when the electronic control unit determines that at least one of the first absolute value and the second absolute value is at least equal to an corresponding threshold.

5. The vehicle according to claim 4 , wherein
the transmission is a constant-mesh transmission with parallel shafts, and a gear stage of the constant-mesh transmission is switched in accordance with an operation position of a manually operated shift lever.

Assignees

• Toyota Motor Co Ltd

Inventors

• Miyazono Hideaki

Classifications

• F16D48/06 Primary

  Control by electric or electronic means, e.g. of fluid pressure · CPC title

• F16D2500/10412

  Transmission line of a vehicle · CPC title

• F16D2500/70426

  Clutch slip · CPC title

• F16D2500/507

  Relating the vehicle · CPC title

• F16D2500/1107

  Vehicles · CPC title