Vehicle control system

Patent metadata

Field	Value
Publication number	US-9334816-B2
Application number	US-201114352118-A
Country	US
Kind code	B2
Filing date	Oct 17, 2011
Priority date	Oct 17, 2011
Publication date	May 10, 2016
Grant date	May 10, 2016

Abstract

A vehicle control system includes: an engine; a power transmission device that transmits power from the engine to drive wheel; a mechanical pump that supplies oil for operating the power transmission device to the power transmission device by driving of the engine; and an electric pump that supplies the oil to the power transmission device by driving of a motor. The vehicle control system is capable of executing stopped economy running control for stopping the engine when a vehicle is stopped, and travel economy running control for stopping the engine while the vehicle is traveling. During the execution of the stopped economy running control, learning control is executed whereby a control value for controlling the oil pressure is updated such that the actual oil pressure generated by the electric pump is converged to a target value. During the execution of the travel economy running control the learning control is prohibited.

First claim

What is claimed is:

1. A vehicle control system capable of executing stopped economy running control for stopping an engine when a vehicle is stopped and travel economy running control for stopping the engine during traveling of the vehicle, the vehicle control system comprising:
an engine:
a power transmission device that transmits power from the engine to a drive wheel;
a mechanical pump that supplies oil for operating the power transmission device to the power transmission device by driving of the engine; and
an electric pump that supplies the oil to the power transmission device by driving of a motor, wherein
learning control for updating a control value for controlling oil pressure is executed so that actual oil pressure generated by the electric pump converges to a target value during execution of the stopped economy running control, and the learning control is prohibited during execution of the travel economy running control.

2. The vehicle control system according to claim 1 , wherein
when the learning control is uncompleted, the execution of the travel economy running control is prohibited.

3. The vehicle control system according to claim 2 , wherein
even when the learning control is uncompleted, the execution of the travel economy running control is permitted in a case where the oil pressure generated by the electric pump during the execution of the stopped economy running control is larger than the target value.

4. The vehicle control system according to claim 3 , wherein
when a fuel consumption amount for generating the oil pressure of the electric pump is larger than a fuel consumption amount generated when the execution of the travel economy running control is prohibited, the execution of the travel economy running control is prohibited.

5. The vehicle control system according to claim 1 , wherein
when an execution condition of the travel economy running control is satisfied for the first time since the engine start, the execution of the travel economy running control is prohibited.

6. The vehicle control system according to claim 1 , wherein
when the travel economy running control is executed for the first time since the engine start, the control value of the electric pump is set such that the oil pressure generated by the electric pump during the execution of the stopped economy running control is at least larger than the target value.

Assignees

• Yamanaka Satoshi
• Ito Yoshio
• Toyota Motor Co Ltd

Inventors

• Yamanaka Satoshi
• Ito Yoshio

Classifications

• F02D29/00 Primary

  Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto · CPC title

• F16H2312/14

  Going to, or coming from standby operation, e.g. for engine start-stop operation at traffic lights · CPC title

• F16H61/0031 Primary

  using auxiliary pumps, e.g. pump driven by a different power source than the engine · CPC title

• F16H2061/0087

  Adaptive control, e.g. the control parameters adapted by learning · CPC title

• B60W20/00

  Control systems specially adapted for hybrid vehicles {(hybrid vehicle design, B60K6/00; electric vehicles B60L)} · CPC title