Level adjustment device for vehicles with air springs
First Claim
1. A level of adjustment device for vehicles with a plurality of air springs, comprising:
- a source of compressed air;
an air dryer connected to the compressed air source;
a check valve connecting said air dryer to said air springs;
a pneumatically controlled first distribution valve having a pneumatic control input, said first distribution valve connected to said air dryer, said compressed air source, the atmosphere, a second controllable distribution valve, and a pneumatically controlled third distribution valve, said pneumatic control input of said first distribution valve connecting said pneumatically controlled first distribution valve to said second controllable distribution valve and to a pneumatically controlled input of said pneumatically controlled third distribution valve, said second controllable distribution valve connecting said air springs to said pneumatic control input of said pneumatically controlled first distribution valve and to said pneumatic control input of said pneumatically controlled third distribution valve, whereas during air spring filling, said check valve is open connecting the compressed air source to said air springs; and
whereas during air spring emptying, each air spring is connected to the atmosphere through said air dryer, through said pneumatically controlled first distribution valve, and through said pneumatically controlled third distribution valve, wherein the pneumatic control input of said first distribution valve is impinged through said second controllable distribution valve with pressure from the air springs against a restoring force acting on the pneumatic control input, and wherein the pneumatically controlled input of the a pneumatically controlled third distribution valve is impinged with the pressure of the air springs against a restoring force acting on the pneumatic control input of the pneumatically controlled third distribution valve, and to end the air spring emptying process, the pneumatic control input of said pneumatically controlled first distribution valve is connected to the atmosphere through said second controlled distribution valve.
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Accused Products
Abstract
Level adjustment device for vehicles with air springs 8a through 8d, by which a vehicle body is furnished with suspension on at least one vehicle axle, which includes the following:
a source of compressed air 2, which, for the purpose of filling air springs 8a through 8d, can be connected to air springs 8a through 8d via an air dryer 4, the air dryer 4, for the purpose of filling the air springs, is connected on one side to air springs 8a through 8d through a check valve 6 that is open to air springs 8a through 8d, each air spring 8a through 8d, for the purpose of emptying them, can be connected through the air dryer 4 and through a pneumatically controlled first distribution valve 10 to the atmosphere, wherein the pneumatic control input 38 of this distribution valve 10 is then impinged through a second controllable distribution valve 12 with the pressure in air springs 8a through 8d against a restoring force 50 acting on the pneumatic control input 38, the pneumatic control input 38 of the pneumatically controlled first distribution valve 10, for the purpose of ending the emptying process, can be connected to the atmosphere, wherein the air dryer 4 is connected on the other side to air springs 8a through 8d through a pneumatically controlled third distribution valve 14, wherein the pneumatic control input 44 of this distribution valve is then impinged with the pressure of air springs 8a through 8d against a restoring force 52 acting on the pneumatic control input 44.
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Citations
22 Claims
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1. A level of adjustment device for vehicles with a plurality of air springs, comprising:
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a source of compressed air;
an air dryer connected to the compressed air source;
a check valve connecting said air dryer to said air springs;
a pneumatically controlled first distribution valve having a pneumatic control input, said first distribution valve connected to said air dryer, said compressed air source, the atmosphere, a second controllable distribution valve, and a pneumatically controlled third distribution valve, said pneumatic control input of said first distribution valve connecting said pneumatically controlled first distribution valve to said second controllable distribution valve and to a pneumatically controlled input of said pneumatically controlled third distribution valve, said second controllable distribution valve connecting said air springs to said pneumatic control input of said pneumatically controlled first distribution valve and to said pneumatic control input of said pneumatically controlled third distribution valve, whereas during air spring filling, said check valve is open connecting the compressed air source to said air springs; and
whereas during air spring emptying, each air spring is connected to the atmosphere through said air dryer, through said pneumatically controlled first distribution valve, and through said pneumatically controlled third distribution valve, wherein the pneumatic control input of said first distribution valve is impinged through said second controllable distribution valve with pressure from the air springs against a restoring force acting on the pneumatic control input, and wherein the pneumatically controlled input of the a pneumatically controlled third distribution valve is impinged with the pressure of the air springs against a restoring force acting on the pneumatic control input of the pneumatically controlled third distribution valve, and to end the air spring emptying process, the pneumatic control input of said pneumatically controlled first distribution valve is connected to the atmosphere through said second controlled distribution valve. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification