Suspension controlling apparatus for vehicle

Patent metadata

Field	Value
Publication number	US-2016272033-A1
Application number	US-201615071427-A
Country	US
Kind code	A1
Filing date	Mar 16, 2016
Priority date	Mar 19, 2015
Publication date	Sep 22, 2016
Grant date	—

Abstract

A suspension controlling apparatus for a vehicle includes a suspension whose damping force is variably settable and a control unit capable of controlling the damping force of the suspension on the basis of a target damping force, to control the damping force of the suspension with a desired control amount and a high responsibility. A control unit includes a acceleration calculation device for calculating an acceleration in a forward and rearward direction of a vehicle on the basis of an operation input amount to the vehicle and a target damping force setting device for determining a target value of damping force on the basis of a damping force map determined in advance in response to the acceleration and a differentiation value of the acceleration.

First claim

What is claimed is:

1 . A suspension controlling apparatus for a vehicle, comprising:
a suspension having a variably settable damping force; and a control unit capable of controlling the damping force of the suspension on the basis of a target damping force; the control unit including acceleration calculation means for calculating an acceleration in a forward and rearward direction of the vehicle on the basis of an operation input amount to the vehicle and target damping force setting means for determining the target damping force on the basis of a damping force map determined in advance in response to the acceleration and a differentiation value of the acceleration.

2 . The suspension controlling apparatus for a vehicle according to claim 1 , wherein the control unit receives, as an input thereto, a vehicle speed detected by a vehicle speed sensor and includes traveling resistance calculation means for calculating traveling resistance of the vehicle on the basis of the vehicle speed, and the acceleration calculation means calculates an acceleration in the forward and rearward direction of the vehicle on the basis of the traveling resistance obtained by the traveling resistance calculation means and the operation input amount.

3 . The suspension controlling apparatus for a vehicle according to claim 1 , and further comprising:
an engine speed sensor configured to detect an engine speed; gear ratio decision means for deciding a gear ratio of a transmission; and a throttle sensor configured to detect a throttle operation amount for controlling an intake air amount of the engine as the operation input amount; wherein the acceleration calculation means calculates driving force on the basis of the engine speed, gear ratio and throttle operation amount and calculates the acceleration on the basis of the driving force.

4 . The suspension controlling apparatus for a vehicle according to claim 1 , and further comprising:
an engine speed sensor configured to detect an engine speed; gear ratio decision means for deciding a gear ratio of a transmission; and a throttle sensor configured to detect a throttle operation amount for controlling an intake air amount of the engine as the operation input amount; wherein the acceleration calculation means calculates driving force on the basis of the engine speed, gear ratio and throttle operation amount and calculates the acceleration on the basis of the driving force.

5 . The suspension controlling apparatus for a vehicle according to claim 1 , and further comprising:
brake operation amount detection means for detecting a brake operation amount as the operation input amount; wherein the acceleration calculation means calculates the acceleration on the basis of deceleration corresponding to the brake operation amount.

6 . The suspension controlling apparatus for a vehicle according to claim 2 , and further comprising:
brake operation amount detection means for detecting a brake operation amount as the operation input amount; wherein the acceleration calculation means calculates the acceleration on the basis of deceleration corresponding to the brake operation amount.

7 . The suspension controlling apparatus for a vehicle according to claim 3 , and further comprising:
brake operation amount detection means for detecting a brake operation amount as the operation input amount; wherein the acceleration calculation means calculates the acceleration on the basis of deceleration corresponding to the brake operation amount.

8 . The suspension controlling apparatus for a vehicle according to claim 1 , wherein a variation amount limit value for limiting a variation amount of the target damping force is set in advance in the control unit.

9 . The suspension controlling apparatus for a vehicle according to claim 2 , wherein a variation amount limit value for limiting a variation amount of the target damping force is set in advance in the control unit.

10 . The suspension controlling apparatus for a vehicle according to claim 3 , wherein a variation amount limit value for limiting a variation amount of the target damping force is set in advance in the control unit.

11 . The suspension controlling apparatus for a vehicle according to claim 5 , wherein a variation amount limit value for limiting a variation amount of the target damping force is set in advance in the control unit.

12 . The suspension controlling apparatus for a vehicle according to claim 8 , wherein a variation amount limit value for acceleration and a variation amount limit value for deceleration which limit a variation amount of the target damping force are set in advance in the control unit.

13 . A suspension controlling apparatus for a vehicle, comprising:
a suspension with a variably settable damping force; and a control unit for controlling the damping force of the suspension on the basis of a target damping force; the control unit including:
acceleration calculation means for calculating an acceleration in a forward and rearward direction of the vehicle on the basis of an operation input amount to the vehicle; and
target damping force setting means for determining the target damping force on the basis of a predetermined damping force map in response to the acceleration and a differentiation value of the acceleration.

14 . The suspension controlling apparatus for a vehicle according to claim 13 , wherein the control unit receives, as an input thereto, a vehicle speed detected by a vehicle speed sensor and includes traveling resistance calculation means for calculating traveling resistance of the vehicle on the basis of the vehicle speed, and the acceleration calculation means calculates an acceleration in the forward and rearward direction of the vehicle on the basis of the traveling resistance obtained by the traveling resistance calculation means and the operation input amount.

15 . The suspension controlling apparatus for a vehicle according to claim 13 , and further comprising:
an engine speed sensor configured to detect an engine speed; gear ratio decision means for deciding a gear ratio of a transmission; and a throttle sensor configured to detect a throttle operation amount for controlling an intake air amount of the engine as the operation input amount; wherein the acceleration calculation means calculates driving force on the basis of the engine speed, gear ratio and throttle operation amount and calculates the acceleration on the basis of the driving force.

16 . The suspension controlling apparatus for a vehicle according to claim 14 , and further comprising:
an engine speed sensor configured to detect an engine speed; gear ratio decision means for deciding a gear ratio of a transmission; and a throttle sensor configured to detect a throttle operation amount for controlling an intake air amount of the engine as the operation input amount; wherein the acceleration calculation means calculates driving force on the basis of the engine speed, gear ratio and throttle operation amount and calculates the acceleration on the basis of the driving force.

17 . The suspension controlling apparatus for a vehicle according to claim 13 , and further comprising:
brake operation amount detection means for detecting a brake operation amount as the operation input amount; wherein the acceleration calculation means calculates the acceleration on the basis of deceleration corresponding to the brake operation amount.

18 . The suspension controlling apparatus for a vehicle according to claim 14 , and fur

Assignees

• Honda Motor Co Ltd

Inventors

• Nedachi Yoshiaki
• Ishikawa Jun
• Yoshino Hiroki

Classifications

• B60G2400/252

  vertical · CPC title

• B60G17/08

  Characteristics of fluid dampers (adjusting fluid dampers in general F16F9/44 - F16F9/53) · CPC title

• B60G2600/187

  Digital Controller Details and Signal Treatment · CPC title

• B60G2400/204

  Vehicle speed · CPC title

• B60G2500/10

  Damping action or damper · CPC title