Apparatus for controlling vehicle spring firmness
AssigneeRobert Bosch GmbH
InventorKonrad Eckert
Life of this patent
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Abstract
An apparatus for controlling the spring firmness of a road vehicle is proposed, which is combined with a control of the shock absorber firmness. Both controls are preformed using a single control valve. Trigger signals for the control valve are ascertained by an electronic device, which receives its signals from sensors, disposed on the vehicle, for spring travel, acceleration, vehicle speed and steering angle or the like, and in particular for a travel sensor which picks up the shock absorber compression and emits it as a signal to the electronic device, whereby changes in spring stiffness are achieved.
Claims15
An apparatus for controlling a spring-type firmness of a road vehicle, comprising a hydraulic load bearing element, a hydraulic control slide valve having a damping cross section of selectable size, said hydraulic control valve arranged to simultaneously monitor a connection between two work chambers of said hydraulic load bearing element and first and second hydropneumatic reservoirs, said hydraulic load bearing element being capable of being expanded into a hydropneumatic spring including said first and second hydropneumatic reservoirs and switching means for selectively switching said control valve to switch fluid from said second hydropneumatic reservoir into or out of action relative to said first reservoir and said hydraulic load bearing element.
An apparatus for controlling a spring-type firmness of a road vehicle, comprising a hydraulic load bearing element, a hydraulic control slide valve comprising a continuously functioning throttle arranged to simultaneously monitor a connection between two work chambers of said hydraulic load bearing element and first and second hydropneumatic reservoirs, said hydraulic load bearing element being capable of being expanded into a hydropneumatic spring including said first and second hydropneumatic reservoirs, and switching means for selectively switching said control valve to switch fluid from said second hydropneumatic reservoir into or out of action relative to said hydraulic load bearing element by coupling said second reservoir to said first reservoir via said throttle of said control valve.
Dependencies are inferred from the claim text.