Driving control system for vehicle

• US 8,930,100 B2
• Filed: 12/11/2012
• Issued: 01/06/2015
• Est. Priority Date: 12/21/2011
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Minase, Yuki, Takagi, Masashi, Ohbayashi, Motonari, Shimada, Hiroshi, Takagi, Toshihiro
• Primary Examiner(s): Cheung, Calvin
• Assistant Examiner(s): SCHNEIDER, PAULA LYNN
• Application Number:
  US13/711,333
• Publication Number:
  US 20130166161A1
• Time in Patent Office: 756 Days
• Field of Search: 701/54, 705/53
• US Class Current: 701/54
• CPC Class Codes: B60W 10/06 including control of combustion engines
• CPC Class Codes: B60W 10/10 including control of change-speed gearings
• CPC Class Codes: B60W 10/11 Stepped gearings
• CPC Class Codes: B60W 2520/10 Longitudinal speed
• CPC Class Codes: B60W 2540/10 Accelerator pedal position
• CPC Class Codes: B60W 2540/16 Ratio selector position
• CPC Class Codes: B60W 2540/165 Rate of change
• CPC Class Codes: B60W 2710/0666 Engine torque
• CPC Class Codes: B60W 2710/083 Torque
• CPC Class Codes: B60W 30/18 Propelling the vehicle
• CPC Class Codes: B60W 30/18009 related to particular drive situations
• CPC Class Codes: B60W 30/18027 Drive off, accelerating from standstill
• CPC Class Codes: B60W 30/1846 Preventing of breakage of drive line components, e.g. parts of the gearing
• CPC Class Codes: F16H 2063/508 for limiting transmission input torque, e.g. to prevent damage of transmission parts
• CPC Class Codes: F16H 59/18 dependent on the position of the accelerator pedal
• CPC Class Codes: F16H 63/50 Signals to an engine or motor

Abstract

A vehicle has a shift mechanism and a position detection device that detects an operation position of the shift mechanism. A transmission is brought to a power transmission state when an operation unit of the shift mechanism is operated to a driving position, and is brought to a power interrupt state when the operation unit is operated to a non-driving position. A driving force limitation process for reducing the driving force of an internal combustion engine is executed when it is determined that the non-driving position has been shifted to the driving position on the basis of the operation position of the operation unit as detected by the position detection device. The driving force limitation process is prohibited when it is determined that the vehicle is traveling and that the operation unit is not operated to any of the operation positions.

Claims

1. A driving control system for a vehicle, comprising:

a shift mechanism that is used in a vehicle in which a motor as a driving source is coupled to wheels via a transmission, and that is configured such that an operation unit coupled to the transmission is selectively shifted to one operating position of a driving position and a non-driving position;

a position detection device that detects the operation position of the operation unit on the basis of an output signal of a detection unit that is attached to each of the operation positions of the operation unit; and

a controller that executes a driving force limitation process for limiting a driving force that is outputted from the motor, when it is determined that the operation unit is shifted from the non-driving position to the driving position on the basis of the operation position of the operation unit detected by the position detection device, in a state that an accelerator operation member of the vehicle is operated to an on state;

wherein the shift mechanism brings the transmission to a power transmission state in which the driving force from the motor is transmitted to the wheels, when the operation unit is operated to the driving position, and brings the transmission to a power interrupt state in which transmission of the driving force from the motor to the wheels is interrupted, when the operation unit is operated to the non-driving position; and

the controller prohibits the driving force limitation process when it is determined that the vehicle is traveling and that the operation unit is not operated to any of the operation positions on the basis of a detection result by the position detection device.

2. The driving control system for a vehicle according to claim 1, wherein

the controller makes the determination that the operation unit is not operated to any of the operation positions on the basis of the detection result by the position detection device immediately before it is determined that the non-driving position has been shifted to the driving position.

3. The driving control system for a vehicle according to claim 1, wherein

the controller determines that the vehicle is traveling when a speed ratio of the transmission is smaller than a predetermined ratio.

4. The driving control system for a vehicle according to claim 1, wherein

the detection unit is a switch that is attached to each of the operation positions to be detected by the detection unit, and that is operated to an on state when the operation unit approaches the detection unit, and is operated to an off state when the operation unit moves away from the operation position.