VEHICULAR VIBRATION DAMPING CONTROL DEVICE AND VEHICLE MOUNTED WITH VIBRATION DAMPING CONTROL DEVICE

• US 20110202235A1
• Filed: 09/10/2009
• Published: 08/18/2011
• Est. Priority Date: 10/31/2008
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Oikawa, Yoshitaka
• Granted Patent: US 9,133,774 B2
• Time in Patent Office: Days
• US Class Current: 701/36
• CPC Class Codes: B60W 10/06 including control of combustion engines
• CPC Class Codes: B60W 2510/0609 Throttle change rate
• CPC Class Codes: B60W 30/20 Reducing vibrations in the driveline
• CPC Class Codes: F02D 11/105 characterised by the function converting demand to actuation, e.g. a map indicating relations between an accelerator pedal position and throttle valve opening or target engine torque
• CPC Class Codes: F02D 11/107 Safety-related aspects
• CPC Class Codes: F02D 2041/1422 Variable gain or coefficients
• CPC Class Codes: F02D 2041/2065 the control being related to the coil temperature
• CPC Class Codes: F02D 2250/28 Control for reducing torsional vibrations, e.g. at acceleration

Abstract

A vehicular vibration damping control device that performs vibration damping of pitch/bounce vibrations of a vehicle through drive output control includes a vibration damping control portion that controls a driving torque of an engine to perform pitch/bounce vibration damping, and a compensation component adjustment portion that reduces the magnitude of a compensation component for compensating for a wheel torque calculated by the vibration damping control portion on the basis of an amount of change in the throttle opening degree of the engine. The compensation component is reduced when the temperature of a conductor for supplying a current to a throttle motor for adjusting a throttle opening degree estimated on the basis of the amount of change in throttle opening degree becomes higher than a predetermined value.

Claims

1-14. -14. (canceled)

15. A vehicular vibration damping control device that performs vibration damping control of damping pitch vibrations or bounce vibrations of a vehicle through control of a drive output of the vehicle, comprising:

a vibration damping control portion that controls a driving torque of an engine in such a manner as to restrain an amplitude of the pitch vibrations or the bounce vibrations on a basis of a wheel torque acting on each wheel of the vehicle, which is generated at a location of a road surface where the wheel is grounded; and

a compensation component adjustment portion that alters a magnitude of at least part of a compensation component for compensating for the wheel torque for the vibration damping control, which is calculated by the vibration damping control portion, on a basis of a temperature of a throttle motor for adjusting a throttle opening degree of the engine.

16. The vibration damping control device according to claim 15, wherein the compensation component adjustment portion estimates a temperature of a conductor for supplying a current to the throttle motor for adjusting the throttle opening degree on a basis of an amount of change in the throttle opening degree, and

the compensation component adjustment portion reduces the magnitude of at least part of the compensation component when the temperature of the conductor becomes higher than a predetermined value.

17. The vibration damping control device according to claim 16, wherein the compensation component adjustment portion reduces the magnitude of at least part of the compensation component for compensating for the wheel torque when a frequency or amplitude of the amount of change in the throttle opening degree becomes equal to or larger than a predetermined value.

18. The vibration damping control device according to claim 17, wherein the compensation component adjustment portion reduces the magnitude of at least part of the compensation component for compensating for the wheel torque when a phenomenon of the frequency or amplitude of the amount of change in the throttle opening degree becoming equal to or larger than the predetermined value is observed even once.

19. The vibration damping control device according to claim 17, wherein the compensation component adjustment portion reduces the magnitude of at least part of the compensation component for compensating for the wheel torque when a phenomenon of the frequency or amplitude of the amount of change in the throttle opening degree becoming equal to or larger than the predetermined value is observed more than a predetermined number of times consecutively or within a predetermined period.

20. The vibration damping control device according to claim 15, wherein the compensation component adjustment portion reduces the magnitude of at least part of the compensation component by reducing a control gain for the compensation component.

21. The vibration damping control device according to claim 15, wherein the compensation component adjustment portion reduces the magnitude of at least part of the compensation component by removing that part of a wheel torque value input to the vibration damping control portion or the compensation component which has a frequency higher than a predetermined frequency.

22. The vibration damping control device according to claim 15, wherein

the vibration damping control portion includes

a feedforward vibration damping control portion that calculates a compensation component for controlling a driving torque of the engine in such a manner as to restrain an amplitude of pitch vibrations or bounce vibrations caused by a wheel torque generated through a request for acceleration/deceleration of the vehicle or a request for a turn of the vehicle, and

a feedback vibration damping control portion that calculates a compensation component for controlling a driving torque of the engine in such a manner as to restrain an amplitude of pitch vibrations or bounce vibrations caused by a wheel torque actually applied to each wheel, and wherein

the compensation component adjustment portion alters the magnitude of at least part of the compensation component which is calculated by the feedback vibration damping control portion.

23. The vibration damping control device according to claim 15, wherein the temperature of the actuator of the throttle valve is calculated based on a requested throttle opening degree or calculated based on an actual throttle opening degree.

24. A vehicle comprising a vibration damping control device according to claim 15.

25. The vehicle according to claim 24, wherein the vibration damping control device reduces the amount of change in the throttle opening degree when the temperature of the actuator of the throttle valve rises.

26. The vehicle according to claim 24, further comprising a temperature sensor provided on the actuator of the throttle valve or a conductor thereof, and detecting a temperature of the actuator of the throttle valve or the conductor thereof by means of the temperature sensor.

27. The vehicle according to claim 24 that detects a value representing operation responsiveness of the actuator of the throttle valve including a difference between a value of a requested throttle opening degree and a value of an actual throttle opening degree, and estimates a temperature of the actuator of the throttle valve on a basis of the value representing operation responsiveness of the actuator of the throttle valve.

28. The vehicle according to claim 24, wherein the vibration damping control device reduces the amount of change in the throttle opening degree when the temperature of the actuator of the throttle valve becomes equal to a first temperature, and stops the throttle valve from operating when the temperature of the actuator of the throttle valve becomes equal to a second temperature higher than the first temperature.