| 摘要 |
<p>A synchronizing system (10) for hydraulic four wheel steering comprising: a double acting front steering cylinder (32) mounted between a stationary member (41) and a front wheel support assembly (20); a double acting rear steering cylinder (34) mounted between a stationary member (43) and a rear wheel support assembly (24); and a synchronizing valve assembly (36) connected by hydraulic lines between the front and the rear steering cylinders, the assembly having a pair of directional relief valves (38,40) that can open to synchronize the positions of the front and the rear steering cylinders.
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