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Vehicle damping control device

A technology for control devices and vehicles, which is applied to control devices, engine control, hybrid vehicles, etc., and can solve problems such as inability to fully perform vibration damping control and output reduction

Active Publication Date: 2013-01-30
NISSAN MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, even if the output is restored when leaving the bad road, the fluctuation does not occur, but the output of the control continues to drop for a predetermined time after the occurrence of the fluctuation, and when it is restored later, the control output continues to drop for more than necessary. There is a problem that vibration damping control cannot be performed sufficiently

Method used

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  • Vehicle damping control device
  • Vehicle damping control device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] figure 1 is a system diagram showing the configuration of the vibration damping control device of Embodiment 1, figure 2 It is a configuration diagram of a vehicle equipped with a vibration damping control device. First, the configuration of the vibration damping control device will be described. The wheel speed sensor 10 detects the speed of each wheel from the number of rotations of each wheel. The accelerator pedal depression amount detection unit 20 detects an accelerator opening APO indicating the depression amount of the accelerator pedal depressed by the driver. The brake operation amount detection unit 30 detects the brake operation amount S_b (brake pedal stroke amount, pedaling force, etc.) by the driver.

[0036] The controller 50 outputs control signals to the driving force control device 60 and the braking force control device 70 which are actuators of the vibration damping control device based on the state quantities detected by the sensors. The contr...

Embodiment 2

[0188] Next, Example 2 will be described. The basic configuration is the same as that of Embodiment 1, so only the different points will be described. Figure 20 It is a flowchart showing the output mode setting process of the second embodiment. The fluctuation detection processing in step 620 is basically the same as that in Embodiment 1, and therefore, description thereof will be omitted. In addition, the fluctuation monitoring time Cycle_Timelmt set for the fluctuation monitoring timer tHunt_Cycle used in the fluctuation detection process of the second embodiment is set to be shorter than the fluctuation monitoring time Cycle_Timelmt of the first embodiment. Thereby, among the fluctuations at the time of brake detection, it is possible to quickly determine that the fluctuations are caused on the vehicle side, and the number of occurrences of fluctuations can be suppressed. In addition, since the fluctuation at the time of brake detection is highly likely to be caused by b...

Embodiment 3

[0205] Next, Example 3 will be described. The basic configuration is the same as that of Embodiment 2, so only the different points will be described. Figure 24 It is a flowchart showing the output mode setting process of the third embodiment. Since steps S620 and S660 are the same as those in Embodiment 2, only the different step 670' will be described. In addition, the fluctuation monitoring time Cycle_Timelmt set to the fluctuation monitoring timer tHunt_Cycle used in the fluctuation detection process of the second embodiment is set to be shorter than the fluctuation monitoring time Cycle_Timelmt of the first embodiment. Accordingly, it is possible to quickly determine that the fluctuation at the time of shimmy detection, that is, the fluctuation caused by the vehicle, can suppress the number of occurrences of the fluctuation. In addition, there is a high possibility that fluctuations at the time of shimmy detection are caused by fluctuations in shimmy vibrations. Theref...

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PUM

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Abstract

When outputting a correcting-torque command value to a drive / braking torque generation means on the basis of a correcting torque that suppresses sprung-weight vibrations, if the amplitude of the correcting torque has remained at or above a prescribed amplitude for a given duration, the disclosed vehicle damping control device outputs a hunting correcting-torque command value that is smaller than a normal correcting-torque command value. If the amplitude of the correcting torque subsequently remains at or below the prescribed amplitude for a first amount of time, the outputted correcting-torque command value is reverted from the hunting correcting-torque command value to the normal correcting-torque command value, but if the amplitude of the correcting torque exceeds the prescribed amplitude and remains in that state for a given duration before the first amount of time passes, the vehicle damping control device continues outputting the hunting correcting-torque command value. This configuration suppresses hunting upon a return to normal damping control, thereby increasing the execution frequency of damping control.

Description

technical field [0001] The present invention relates to a vibration damping control device for suppressing vibration generated in a vehicle. Background technique [0002] Conventionally, the damping torque for suppressing sprung vibration is calculated as input values ​​of the driving torque and the wheel speed, and when the vibration amplitude of the damping torque is greater than or equal to a predetermined amplitude for a predetermined period of time (hereinafter referred to as fluctuation) As a technique for reducing the control gain, the technique described in Patent Document 1 is known. [0003] However, the technique described in the aforementioned Patent Document 1 has the following problems. That is, one of the main causes of occurrence of fluctuations is a cause on the road surface side of a bad road or the like. In this case, even if the output is restored when leaving the bad road, the fluctuation does not occur, but the output of the control continues to drop ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W30/02B60W10/04B60W10/18F02D29/02B60T8/00B60W10/06B60W10/184B60W40/11
CPCB60W2050/0024B60W2050/0033B60W10/04B60W30/02B60W30/20B60W2030/041B60W10/18B60W10/08B60W2710/083B60W20/00B60W2520/30B60W20/15B60W20/11
Inventor 小林洋介木村健盐泽裕树太田光纪佐佐木博树伊藤明弘吉泽正彦
Owner NISSAN MOTOR CO LTD