Vehicle starting clutch control device

• US 20020055415A1
• Filed: 11/07/2001
• Published: 05/09/2002
• Est. Priority Date: 11/07/2000
• Status: Active Grant

• Current Assignee: Honda Giken Kogyo Kabushiki Kaisha (Honda Motor Company)
• Original Assignee: Honda Giken Kogyo Kabushiki Kaisha (Honda Motor Company)
• Inventors: Kitada, Mitsuo, Yoshikawa, Haruhiko
• Granted Patent: US 6,767,311 B2
• Time in Patent Office: Days
• US Class Current: 477/166
• CPC Class Codes: B60W 10/02 including control of driveline clutches
• CPC Class Codes: B60W 10/06 including control of combustion engines
• CPC Class Codes: B60W 2510/0642 Idle condition
• CPC Class Codes: B60W 2540/10 Accelerator pedal position
• CPC Class Codes: B60W 2710/022 Clutch actuator position
• CPC Class Codes: B60W 2710/027 Clutch torque
• CPC Class Codes: B60W 30/20 Reducing vibrations in the driveline
• CPC Class Codes: F16D 2500/3026 Stroke
• CPC Class Codes: F16D 2500/30407 Clutch slip change rate
• CPC Class Codes: F16D 2500/30426 Speed of the output shaft
• CPC Class Codes: F16D 2500/3067 Speed of the engine
• CPC Class Codes: F16D 2500/3108 Vehicle speed
• CPC Class Codes: F16D 2500/31426 Brake pedal position
• CPC Class Codes: F16D 2500/3144 Accelerator pedal position
• CPC Class Codes: F16D 2500/70462 Opening of the throttle valve
• CPC Class Codes: F16D 2500/70615 PI control
• CPC Class Codes: F16D 2500/70626 PID control
• CPC Class Codes: F16D 2500/7109 Pulsed signal; Generating or processing pulsed signals; PWM, width modulation, frequency or amplitude modulation
• CPC Class Codes: F16D 48/066 Control of fluid pressure, e.g. using an accumulator F16D48/062, F16D48/068 take precedence
• CPC Class Codes: F16D 48/08 Regulating clutch take-up on starting
• CPC Class Codes: F16H 59/22 : Idle position

Abstract

A starting clutch control device controls such that the transmission torque capacity of a starting clutch (clutch torque) becomes a value required to transmit a torque equal to an engine absorption torque at the time of power-off running. A control of gradually increasing a clutch torque is carried out with a delay after an accelerator pedal is depressed during power-off running, to thereby prevent the occurrence of surging vibrations when an accelerator pedal is abruptly depressed during power-off running.

Claims

1. A vehicle starting clutch control device for arbitrarily controlling a transmission torque capacity of a starting clutch through an actuator, said vehicle starting clutch control device comprising:

first control means for controlling said actuator so that said starting clutch is put in a state that said starting clutch completely transmits the output torque of an engine at the time of power-on running with an accelerator pedal being depressed;

second control means for controlling said actuator so that the transmission torque capacity of said starting clutch becomes a value required to transmit a torque equal to an engine absorption torque corresponding to the engine speed at the time of power-off running without said accelerator pedal being depressed;

third control means for controlling said actuator so that the transmission torque capacity of said starting clutch is gradually increased to shift said starting clutch to the completely transmitted state when said accelerator pedal is depressed during power-off running; and

delay means for delaying the start of control based on said third control means until a predetermined time after said accelerator pedal is depressed.

2. The vehicle starting clutch control device according to claim 1, wherein said second control means sets as a control target value a control amount of said actuator such that the transmission torque capacity of said starting clutch becomes equal to a set value of the engine absorption torque, said set valve of the engine absorption torque being a value obtained by multiplying a reference value of the engine absorption torque corresponding to the engine speed by a predetermined safety factor, and

wherein said second control means controls said actuator based on the control target value while detecting the slippage ratio of said starting clutch and feedback correcting said control target value such that said slippage ratio becomes equal to or less than a predetermined value.

3. The vehicle starting clutch control device according to claim 1, wherein said delay means starts the control of said third control means after the transmission torque capacity of said starting clutch is maintained to a value corresponding to the engine absorption torque resulting when the engine speed is substantially 1000 rpm for said predetermined time after said accelerator pedal is depressed.

4. The vehicle starting clutch control device according to claim 1, wherein said predetermined time is a time that the detected engine output torque exceeds the transmission torque capacity of said starting clutch.

5. The vehicle starting clutch control device according to claim 2, wherein the predetermined value of said slippage ratio is set to be in the range of 1.0-1.04.