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ZHENJIANG HYDRAULICS CO., LTD.

SNIEC N4.188

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the 108 emergency‑assist full hydraulic steering unit

Product Category: Steering mechanisms

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Product Introduction

When steering, only the internal spring compression force needs to be overcome, resulting in light steering torque. If the engine suddenly stalls, the driver manually turns the steering wheel as power input, and the metering motor of the steering gear acts as a pump to deliver output flow. Displacements of 60‑125 mL/r enable emergency power‑assisted steering. As the displacement increases, the input torque at the steering wheel rises, the emergency assist performance deteriorates, and the risk of steering loss of control occurs. To address this issue, the 108 emergency‑assist full hydraulic steering unit utilizes inlet oil pressure control to achieve an emergency assist mode. Under normal operation, inlet high‑pressure oil controls switching valve, and the two sets of stator‑rotor pairs work together to realize large‑displacement full hydraulic steering. When the engine stalls, inlet oil pressure drops, and the system switches to small‑displacement stator‑rotor pair, allowing manual in

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International Trade Fair for Construction Machinery, Building Material Machines, Mining Machines and Construction Vehicles

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