摘要:
A hydraulic actuation system includes a differential unit having a hydraulically-actuated differential, a power steering unit, a hydraulic pump, a reservoir, a controller, an electronically- controlled flow control manifold, and a proportional pressure control solenoid valve. A flow control manifold may control fluid flow to the power steering unit and the differential. The manifold may include a manifold inlet connected to a pump; first manifold outlet connected to a differential; second manifold outlet connected to a reservoir; third manifold outlet connected to a power steering unit; two-way solenoid valve connected to a manifold inlet and controlled by a controller; flow control valve connected to a two-way solenoid valve and a first manifold outlet; and a pressure differential sensing valve connected to a two-way solenoid valve, the manifold inlet, and the third manifold outlet. A proportional pressure control solenoid valve may connect the first manifold outlet and the differential.
摘要:
A power steering system for a ground vehicle includes an accumulator that supplies high-pressure fluid through a control valve to a fluid motor that drives the steerable wheels of the vehicle. A normally open control valve between the accumulator and the fluid motor closes prior to the steerable wheels reaching an axle stop to relieve power assist.
摘要:
An arrangement is utilized for reducing the manual steering force associated with steering a motorcycle. A handlebar (1) is arranged to rotate around an axis of rotation (25) by means of the steering force. The motorcycle has a damping device (9) that is operated by a damping medium (37a) and is arranged to take up movement that is transmitted to the handlebar (1) as a result of unevenness in the surface (55) upon which the motorcycle is being driven. The arrangement is arranged, by means of the action of the damping medium (37a), to effect a servo function that achieves the reduction in the steering force. Advantages are thereby obtained, among other things, in the case of motorcycles with two-wheel drive and heavy motorcycles, that can be provided with a servo function in a technically simple way.
摘要:
The invention relates to a hydraulic steering system (1) with a hydraulic steering unit (2), a priority valve (4), a pump (3), which is connected with the steering unit (2) via a supply line (16), in which the priority valve is arranged (4), and with a load-sensing system and at least one additional pressure sink (5), which is connected with the priority valve (4). In this connection it is endeavoured to ensure the steering, also when the pressure sink has a consumption of load-sensing pressure. For this purpose, the load-sensing system has a first load-sensing line (9), with a pressure (LS) determined by the steering unit, which pressure determines the position of the priority valve (4), and a second load-sensing line (13), which is connected on the one side with the control input (6) of the pump (3) and the additional pressure sink (5) and on the other side with a point in the supply line (16), means being provided for the adaptation of the pressure in the second load-sensing line (13) to the pressure in the first load-sensing line (9).
摘要:
In vehicles including both a hydraulic actuated fuel injection system (A-10) and a traditional power steering system (A-24), the present invention utilizes a single hydraulic pump (A-42) to power both systems to increase engine efficiency and reduce engine part count. Likewise, the present invention utilizes a single hydraulic pump to power both a hydraulic system and a fan drive system in engines including both engine subsystems. Further, for vehicle engines including passenger compartment heating systems, the present invention increases engine efficiency by allowing the heating system to operate effectively, even shortly after a cold start.
摘要:
Known priority valves comprise a control valve for damping the movement of a regulating piston. A piston of this type has a very complex construction and is expensive to produce. The invention therefore proposes a selectable control valve (29), whose non-spring loaded side is connected to the feed line (13) and whose spring loaded side is connected to the pressure chamber of the non-spring loaded side of the regulating piston (22).