Vehicular damping control system

• US 8,682,546 B2
• Filed: 06/23/2010
• Issued: 03/25/2014
• Est. Priority Date: 07/09/2009
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Otsuka, Takayuki, Harima, Kenji
• Primary Examiner(s): Tran, Khoi
• Assistant Examiner(s): RINK, RYAN J
• Application Number:
  US13/382,193
• Publication Number:
  US 20120101691A1
• Time in Patent Office: 1,371 Days
• Field of Search: 123/192.1
• US Class Current: 701/54
• CPC Class Codes: B60W 2510/0619 Air-fuel ratio
• CPC Class Codes: B60W 2520/16 Pitch
• CPC Class Codes: B60W 2540/10 Accelerator pedal position
• 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 2250/21 during a transition between engine operation modes or states
• CPC Class Codes: F02D 41/027 to purge or regenerate the exhaust gas treating apparatus
• CPC Class Codes: F02D 41/028 Desulfurisation of NOx traps or adsorbent
• CPC Class Codes: F02D 41/029 the exhaust gas treating apparatus being a particulate filter
• CPC Class Codes: F02D 41/3035 a mode being the premixed charge compression-ignition mode
• CPC Class Codes: F02D 41/3076 with special conditions for selecting a mode of combustion, e.g. for starting, for diagnosing
• CPC Class Codes: F02D 41/402 Multiple injections
• CPC Class Codes: Y02T 10/40 Engine management systems

Abstract

A vehicular damping control system that executes damping control that suppresses sprung mass vibration in the vehicle by controlling a power source mounted in a vehicle changes the control mode of the damping control according to the operating range of the power source. Changing the control mode of the damping control according to the operating range of the power source enables the vehicular damping control system to improve coordination between the damping control and other control related to the power source, for example, and thus execute appropriate damping control.

Claims

1. A vehicular damping control system comprising an ECU that executes damping control that suppresses sprung mass vibration in a vehicle by controlling an engine mounted in the vehicle,

wherein a control mode of the engine related to fuel combustion switches if engine speed and injection quantity fall within a predetermined region, and the damping control is prohibited when the engine speed and the injection quantity fall within the predetermined region.

2. The vehicular damping control system according to claim 1, wherein a control mode of the damping control is changed according to a control mode of the engine that is selected according to a state of the engine.

3. The vehicular damping control system according to claim 1, wherein a control amount of the damping control is reduced in a region where the control mode of the engine is switching compared to a region where the control mode of the engine is not switching.

4. The vehicular damping control system according to claim 1, wherein a control mode of the damping control is changed such that the damping control will continue to be executed in a region where the control mode of the engine is not switching.

5. The vehicular damping control system according to claim 4, wherein an execution state of the damping control is determined based on a control amount until the control mode of the engine switches.

6. The vehicular damping control system according to claim 4, wherein an execution state of the damping control is determined based on a condition that the control mode of the engine is not switching.

7. The vehicular damping control system according to claim 6, wherein a gain of the damping control is corrected.

8. The vehicular damping control system according to claim 1, wherein the engine is a diesel engine.

9. The vehicular damping control system according to claim 1, wherein when a vibration fluctuation component of approximately 1.5 Hz is generated in a vertical direction of the vehicle, damping control is performed by outputting anti-phase torque from the engine.

10. The vehicular damping control system according to claim 9, wherein anti-phase torque is prohibited from being output from the engine in a region where a control mode of the engine that is selected according to a usage region of the engine switching.

11. The vehicular damping control system according to claim 9, wherein anti-phase torque is output from the engine in a range where a control mode of the engine that is selected according to a usage region of the engine not switching.

12. The vehicular damping control system according to claim 9, wherein a gain of anti-phase torque output from the engine is corrected in a range where a control mode of the engine that is selected according to a usage region of the engine not switching.

13. The vehicular damping control system according to claim 9, wherein a control mode of the engine is selected precluding the anti-phase torque that is output from the engine by the damping control, in a region where the control mode of the engine that is selected according to a usage region of the engine switches.

14. A vehicular damping control system comprising an ECU that executes damping control that suppresses sprung mass vibration in a vehicle by controlling a power source mounted in the vehicle,

wherein the damping control is prohibited when a control mode of the power source is in one of a combustion mode switching region and an injection mode switching region.

15. The vehicular damping control system according to claim 14, wherein the control mode of the damping control is changed such that the damping control will continue to be executed in a region other than the combustion mode switching region and the injection mode switching region.

16. The vehicular damping control system according to claim 14, wherein the power source includes at least an engine, and when a vibration fluctuation component of approximately 1.5 Hz is generated in a vertical direction of the vehicle, damping control is performed by outputting anti-phase torque from the engine.