Active suspension apparatus for vehicle

Patent metadata

Field	Value
Publication number	US-9352633-B2
Application number	US-201514736034-A
Country	US
Kind code	B2
Filing date	Jun 10, 2015
Priority date	Jun 11, 2014
Publication date	May 31, 2016
Grant date	May 31, 2016

Abstract

An active suspension apparatus for a vehicle includes actuators configured to compensate displacements of coil springs connected to wheels of the vehicle, a first pump configured to supply a fluid to one of the actuators on left and right front wheels of the vehicle among the actuators, and a second pump configured to supply a fluid to one of the actuators on left and right rear wheels of the vehicle among the actuators, in which the fluid contained in one of cylinders of the first pump and the second pump is supplied to at least one of the actuators based on driving of a motor.

First claim

What is claimed is:

1. An active suspension apparatus for a vehicle, comprising:
actuators configured to compensate displacements of coil springs connected to wheels of the vehicle;
a first pump configured to supply a fluid to one of the actuators of left and right front wheels of the vehicle among the actuators; and
a second pump configured to supply a fluid to one of the actuators of left and right rear wheels of the vehicle among the actuators,
wherein the fluid contained in one of cylinders of the first pump and the second pump is supplied to at least one of the actuators based on driving of a motor.

2. The active suspension apparatus of claim 1 , wherein each of the first pump and the second pump is independently operated.

3. The active suspension apparatus of claim 1 , further comprising:
a first flow channel and a third flow channel configured to connect the first pump with the actuators of the left and right front wheels of the vehicle; and
a second flow channel and a fourth flow channel configured to connect the second pump with the actuators of the left and right rear wheels of the vehicle,
wherein a valve configured to open and close a flow channel is disposed on at least one of the first flow channel, the second flow channel, the third flow channel, and the fourth flow channel.

4. The active suspension apparatus of claim 1 , further comprising:
a first intersection flow channel configured to be for movements of the fluid between the actuator on the left front wheel and the actuator on the right rear wheel; and
a second intersection flow channel configured to be for movements of the fluid between the actuator on the right front wheel and the actuator on the left rear wheel.

5. The active suspension apparatus of claim 4 , wherein an auxiliary valve configured to control the movements of the fluid is disposed on at least one of the first intersection flow channel and the second intersection flow channel.

6. The active suspension apparatus of claim 1 , wherein one of the first pump and the second pump comprises:
a first ball screw and a second ball screw configured to be disposed on one side and the other side of the cylinder, respectively, and to rotate based on the driving of the motor; and
a first piston and a second piston configured to linearly reciprocate inside the cylinder based on the rotation of the first ball screw and the second ball screw.

7. The active suspension apparatus of claim 6 , wherein the first ball screw and the second ball screw rotate on the same shaft, and
wherein when the first ball screw and the second ball screw rotate due to the driving of the motor in one of one direction and the other direction, the first piston and the second piston move toward one of the one side and the other side of the cylinder and supply the fluid contained in one of the one side and the other side of the cylinder to one of the actuators of the left wheels and the actuators of the right wheels.

8. The active suspension apparatus of claim 6 , wherein one of the first pump and the second pump further comprises a restoring unit configured to support at least one of the first piston and the second piston.

Assignees

• Mando Corp

Inventors

• Kim Tae Ju

Classifications

• B60G17/021 Primary

  the mechanical spring being a coil spring (B60G17/0272 takes precedence) · CPC title

• B60G17/033

  characterised by regulating means acting on more than one spring · CPC title

• B60G17/027

  Mechanical springs regulated by fluid means (B60G17/033 takes precedence) · CPC title

• B60G17/0408

  details, e.g. antifreeze for suspension fluid, pumps, retarding means per se · CPC title

• F16H25/2204

  with balls · CPC title