Patent ID: 11932340
Assignee: ROBERT BOSCH GMBH
Field: Transport (Mechanical engineering)
Classification: CPC B  F | IPC B  F

Claim 8:
9. A pre-load adjusting apparatus for a shock absorber on a vehicle, the shock absorber capable of corresponding increasing or decreasing pre-load with the increasing or decreasing of fluid to the shock absorber, and a reservoir external to the shock absorber for holding fluid reserves, comprising:
a manifold block having a first port configured to be fluidly connected to the reservoir, a second port configured to be fluidly connected to the shock absorber, and defining a number of fluid passages therebetween;
a pump having an inlet and an outlet in fluid communication with the number of fluid passages, the pump configured to, when activated, move fluid in the number of fluid passages;
a first solenoid valve fluidly disposed in the number of fluid passages between the first port and the inlet of the pump, configured to control fluid flow between the reservoir and the inlet of the pump;
a second solenoid valve fluidly disposed in the number of fluid passages between the outlet of the pump and the first port, configured to control fluid flow between the outlet of the pump and the reservoir;
a third solenoid valve fluidly disposed in the number of fluid passages between the second port and the inlet of the pump, configured to control fluid flow between the shock absorber and the inlet of the pump;
a fourth solenoid valve fluidly disposed in the number of fluid passages between the outlet of the pump and the second port, configured to control fluid flow between the outlet of the pump and the shock absorber;
a pressure sensor fluidly disposed in the number of fluid passages proximate the second port, configured to provide a pressure signal corresponding to a pressure of the fluid in the shock absorber;
a controller in communication with the pressure sensor, the first, second, third, and fourth solenoid valves, and the pump, configured to receive the pressure signal and engage the solenoid valves and the pump to move fluid in the number of fluid passages to control the pre-load of the shock absorber, wherein the manifold block further defines an anti-lock braking circuit and the pump provides anti-lock modulation of the fluid to a braking system.