Vehicle and a height adjustment system for the vehicle

• US 9,751,374 B2
• Filed: 08/17/2015
• Issued: 09/05/2017
• Est. Priority Date: 09/22/2014
• Status: Active Grant

• Current Assignee: GM Global Technology Operations LLC (General Motors Company)
• Original Assignee: GM Global Technology Operations LLC (General Motors Company)
• Inventors: Izak, Robert G.
• Primary Examiner(s): GOODEN JR, BARRY J
• Application Number:
  US14/827,993
• Publication Number:
  US 20160082802A1
• Time in Patent Office: 750 Days
• CPC Class Codes: B60G 17/0152 characterised by the action on a particular type of suspension unit B60G17/01941 takes precedence
• CPC Class Codes: B60G 17/0272 the mechanical spring being a coil spring
• CPC Class Codes: B60G 17/0525 Height adjusting or levelling valves
• CPC Class Codes: B60G 17/056 Regulating distributors or valves for hydropneumatic systemsB60G17/044 - B60G17/048, B60G17/0416 take precedence; Fluid interconnection systems to control vehicle inclination B60G21/06, B60G21/10; valves per se F16K
• CPC Class Codes: B60G 17/0565 Height adjusting valves
• CPC Class Codes: B60G 17/08 Characteristics of fluid dampers adjusting fluid dampers in general F16F9/44 - F16F9/53
• CPC Class Codes: B60G 21/067 between wheels on different axles on the same side of the vehicle, i.e. the left or the right side
• CPC Class Codes: B60G 21/073 between wheels on the same axle but on different sides of the vehicle, i.e. the left and right wheel suspensions being interconnected
• CPC Class Codes: B60G 2200/144 with two lateral arms forming a parallelogram
• CPC Class Codes: B60G 2202/312 The spring being a wound spring
• CPC Class Codes: B60G 2202/32 The spring being in series with the damper and/or actuator
• CPC Class Codes: B60G 2202/413 Hydraulic actuator
• CPC Class Codes: B60G 2202/414 using electrohydraulic valves
• CPC Class Codes: B60G 2202/415 using other types of valves, e.g. mechanically operated valves
• CPC Class Codes: B60G 2204/8304 using a fluid
• CPC Class Codes: B60G 2500/02 Supply or exhaust flow rates; Pump operation
• CPC Class Codes: B60G 2500/30 Height or ground clearance
• CPC Class Codes: B60G 2600/70 Computer memory; Data storage, e.g. maps for adaptive control
• CPC Class Codes: B60G 3/20 all arms being rigid

Abstract

A vehicle and a height adjustment system for the vehicle are disclosed. A valve includes a member movable between a first position operating first and second piston mechanisms to raise an end of the vehicle to a first height, a second position operating the first and second piston mechanisms to lower the end of the vehicle to a second height and a third position maintaining the end of the vehicle at one of the first height and the second height. A first fluid line extends between the first piston mechanism and the valve to fluidly connect the first piston mechanism and the valve. Additionally, a second fluid line extends between the second piston mechanism and the valve to fluidly connect the second piston mechanism and the valve. The first fluid line and the second fluid line are fluidly connected to the valve independently of each other.

Claims

1. A height adjustment system for a vehicle, the system comprising:

a first piston mechanism adapted to be coupled to a first suspension assembly;

a second piston mechanism adapted to be coupled to a second suspension assembly;

a valve including a member movable between a first position operating the first and second piston mechanisms to raise an end of the vehicle to a first height, a second position operating the first and second piston mechanisms to lower the end of the vehicle to a second height, and a third position maintaining the end of the vehicle at one of the first height and the second height;

a first fluid line extending between the first piston mechanism and the valve to fluidly connect the first piston mechanism and the valve; and

a second fluid line extending between the second piston mechanism and the valve to fluidly connect the second piston mechanism and the valve, with the first fluid line and the second fluid line fluidly connected to the valve independently of each other;

an inlet line extending to the valve and the inlet line splits into a first segment and a second segment;

an outlet line extending to the valve and the outlet line splits into a first segment and a second segment.

2. The system as set forth in claim 1 wherein the valve includes an actuator selectively energized to move the member to one of the first position and the second position;

and wherein the valve includes a plurality of biasing members continuously biasing the member to the third position.

3. The system as set forth in claim 2 further including a controller in communication with the actuator to selectively energize the actuator.

4. The system as set forth in claim 1 further including a pump selectively actuated to deliver a fluid to the first and second piston mechanisms, with the inlet line extending between the pump and the valve to fluidly connect the pump and the valve, and further including a reservoir selectively receiving the fluid from the first and second piston mechanisms, with the outlet line extending between the valve and the reservoir to fluidly connect the valve and the reservoir.

5. The system as set forth in claim 4 further including a one-way valve disposed along the inlet line upstream from the split into the first and second segments of the inlet line which prevents backflow to the pump.

6. The system as set forth in claim 4 further including:

a first one-way valve disposed along the first segment of the inlet line between the pump and the valve which prevents backflow to the pump;

a second one-way valve disposed along the second segment of the inlet line between the pump and the valve which prevents backflow to the pump;

a third one-way valve disposed along the first segment of the outlet line between the valve and the reservoir which prevents backflow to the valve; and

a fourth one-way valve disposed along the second segment of the outlet line between the valve and the reservoir which prevents backflow to the valve.

7. The system as set forth in claim 1 wherein the member defines a first path and a second path spaced from each other, with the first path aligning with the first fluid line when the member is in the first position and the second path aligning with the second fluid line when the member is in the first position.

8. The system as set forth in claim 7 wherein the inlet line is fluidly connected to the first and second fluid lines through the first and second paths when the member is in the first position;

and wherein the first and second paths are spaced from the inlet line when the member is in the third position.

9. The system as set forth in claim 8 wherein the first segment of the inlet line and the first fluid line are fluidly connected through the first path when the member is in the first position, and the second segment of the inlet line and the second fluid line fluidly connected through the second path when the member is in the first position.

10. The system as set forth in claim 9 wherein the first fluid line splits into a first portion and a second portion, with the first portion of the first fluid line and the first segment of the inlet line fluidly connected through the first path when the member is in the first position.

11. The system as set forth in claim 10 wherein the first segment of the outlet line and the second fluid line are fluidly connected through the second path when the member is in the second position, and the second segment of the outlet line and the second portion of the first fluid line are fluidly connected through the first path when the member is in the second position.

12. The system as set forth in claim 7 wherein the outlet line is fluidly connected to the first and second fluid lines through the first and second paths when the member is in the second position;

and wherein the first and second paths are spaced from the outlet line when the member is in the third position.

13. The system as set forth in claim 12 wherein the first segment of the outlet line and the second fluid line are fluidly connected through the second path when the member is in the second position, and the second segment of the outlet line and the first fluid line are fluidly connected through the first path when the member is in the second position.

14. The system as set forth in claim 13 wherein the second fluid line splits into a first portion and a second portion, with the second portion of the second fluid line and the first segment of the outlet line fluidly connected through the second path when the member is in the second position.

15. The system as set forth in claim 14 wherein the first segment of the inlet line and the first fluid line are fluidly connected through the first path when the member is in the first position, and the second segment of the inlet line and the first portion of the second fluid line are fluidly connected through the second path when the member is in the first position.

16. A vehicle comprising:

a body including an end;

a first suspension assembly coupled to the body;

a first piston mechanism coupled to the first suspension assembly;

a second suspension assembly coupled to the body;

a second piston mechanism coupled to the second suspension assembly;

a valve including a member movable between a first position operating the first and second piston mechanisms to raise the end to a first height, a second position operating the first and second piston mechanisms to lower the end to a second height, and a third position maintaining the end at one of the first height and the second height;

a first fluid line extending between the first piston mechanism and the valve to fluidly connect the first piston mechanism and the valve; and

a second fluid line extending between the second piston mechanism and the valve to fluidly connect the second piston mechanism and the valve, with the first fluid line and the second fluid line fluidly connected to the valve independently of each other;

wherein the member defines a first path and a second path spaced from each other, with the first path aligning with the first fluid line when the member is in the first position and the second path aligning with the second fluid line when the member is in the first position;

an inlet line extending to the valve and fluidly connected to the first and second fluid lines through the first and second paths when the member is in the first position;

an outlet line extending to the valve and fluidly connected to the first and second fluid lines through the first and second paths when the member is in the second position;

wherein the first and second paths are spaced from the inlet line and the outlet line when the member is in the third position;

wherein the inlet line splits into a first segment and a second segment, with the first segment of the inlet line and the first fluid line fluidly connected through the first path when the member is in the first position, and the second segment of the inlet line and the second fluid line fluidly connected through the second path when the member is in the first position;

wherein the outlet line splits into a first segment and a second segment, with the first segment of the outlet line and the second fluid line fluidly connected through the second path when the member is in the second position, and the second segment of the outlet line and the first fluid line fluidly connected through the first path when the member is in the second position.

17. The vehicle as set forth in claim 16 wherein:

the first fluid line splits into a first portion and a second portion, with the first portion of the first fluid line and the first segment of the inlet line fluidly connected through the first path when the member is in the first position, and the second portion of the first fluid line and the second segment of the outlet line fluidly connected through the first path when the member is in the second position; and

the second fluid line splits into a first portion and a second portion, with the first portion of the second fluid line and the second segment of the inlet line fluidly connected through the second path when the member is in the first position, and the second portion of the second fluid line and the first segment of the outlet line fluidly connected through the second path when the member is in the second position.

18. The vehicle as set forth in claim 16 further including a pump selectively actuated to deliver a fluid to the first and second piston mechanisms, with the inlet line extending between the pump and the valve to fluidly connect the pump and the valve, and further including a reservoir selectively receiving the fluid from the first and second piston mechanisms, with the outlet line extending between the valve and the reservoir to fluidly connect the valve and the reservoir.

19. A height adjustment system for a vehicle, the system comprising:

a first piston mechanism adapted to be coupled to a first suspension assembly;

a second piston mechanism adapted to be coupled to a second suspension assembly;

a valve including a member movable between a first position operating the first and second piston mechanisms to raise an end of the vehicle to a first height, a second position operating the first and second piston mechanisms to lower the end of the vehicle to a second height, and a third position maintaining the end of the vehicle at one of the first height and the second height;

a first fluid line extending between the first piston mechanism and the valve to fluidly connect the first piston mechanism and the valve; and

a second fluid line extending between the second piston mechanism and the valve to fluidly connect the second piston mechanism and the valve, with the first fluid line and the second fluid line fluidly connected to the valve independently of each other;

wherein the member defines a first path and a second path spaced from each other;

an outlet line extending to the valve and fluidly connected to the first and second fluid lines through the first and second paths when the member is in the second position;

wherein the outlet line splits into a first segment and a second segment, with the first segment of the outlet line and the second fluid line fluidly connected through the second path when the member is in the second position.

20. The system as set forth in claim 19 wherein:

the first and second paths are spaced from the outlet line when the member is in the third position; and

the second segment of the outlet line and the first fluid line are fluidly connected through the first path when the member is in the second position.

21. The system as set forth in claim 19 wherein the second fluid line splits into a first portion and a second portion, with the second portion of the second fluid line and the first segment of the outlet line fluidly connected through the second path when the member is in the second position.