Vehicle controller and method of controlling a vehicle

• US 20080033619A1
• Filed: 07/16/2007
• Published: 02/07/2008
• Est. Priority Date: 08/01/2006
• Status: Abandoned Application

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Kobayashi, Nobufusa, Asami, Tomohiro, Tokura, Takaaki, Sugimura, Toshio
• Application Number:
  US11/826,408
• Publication Number:
  US 20080033619A1
• Time in Patent Office: Days
• US Class Current: 701/54
• CPC Class Codes: B60W 10/06 including control of combustion engines
• CPC Class Codes: B60W 10/115 with planetary gears
• CPC Class Codes: B60W 30/19 Improvement of gear change, e.g. by synchronisation or smoothing gear shift
• CPC Class Codes: F16H 2059/506 Wheel slip
• CPC Class Codes: F16H 59/18 dependent on the position of the accelerator pedal
• CPC Class Codes: F16H 61/0437 by using electrical signals F16H61/0403 and F16H61/061 take precedence
• CPC Class Codes: F16H 61/686 with orbital gears
• CPC Class Codes: F16H 63/502 for smoothing gear shifts

Abstract

When it is determined that the torque output from a power source is being automatically controlled, an ECU prohibits torque-boosting control of the power source during the torque phase when up-shifting, and performs up-shifting without performing torque-boosting control. In performing torque-boosting control, the driver demanded torque in response to the accelerator operation amount is used as the reference in setting amount of torque demanded from the power source.

Claims

1. A vehicle controller for a vehicle equipped with a power source and an automatic transmission, connected to the power source, that establishes a plurality of gear steps having different gear ratios by selectively engaging a plurality of friction engaging elements comprising:

a torque booster that increases the torque of the power source during a torque phase of an up-shift when the automatic transmission is up-shifted, and

a device that prohibits increases of the torque during the torque phase when the torque of the power source is automatically controlled independently of an output amount demanded by a driver.

2. The controller of a vehicle according to claim 1, further comprising

an output controller that controls the power source in order to increase the torque based on a torque in response to the demanded output amount when increasing the torque during the torque phase.

3. The controller of a vehicle according to claim 1, wherein

the demanded output amount is based on an accelerator operation amount.

4. The controller of a vehicle according to claim 1, wherein

the torque of the power source is automatically controlled when a shift lever is operated from a position not intended for moving a vehicle to a position intended for moving a vehicle.

5. The controller of a vehicle according to claim 1, wherein

the torque of the power source is automatically controlled when wheel slip is detected when the vehicle is starting or accelerating.

6. The controller of a vehicle according to claim 1, wherein

the torque of the power source is automatically controlled when a skidding of vehicle is detected.

7. A method of controlling a vehicle equipped with a power source and an automatic transmission, connected to the power source, that establishes a plurality of gear steps with different gear ratios by selectively engaging a plurality of friction engaging elements, the method comprising:

increasing the torque of the power source during a torque phase of an up-shift when the automatic transmission is up-shifted, and

prohibiting increases in the torque during the torque phase when the torque of the power source is automatically controlled independently of an output amount demanded by a driver.