| 摘要 |
A pressure washer includes a frame and an engine coupled to the frame. The engine has a throttle configured to control the speed of the engine. The pressure washer also includes a pump attached to the frame. The pump includes a housing with an inlet and an outlet formed in the housing. A flow path extends between the inlet and the outlet. The pump has a through mode, permitting water to flow through the flow path. And, the pump has a bypass mode establishing a recirculation circuit. The pressure washer also includes a pressure-sensitive member positioned along the flow path and attached directly to the recirculation circuit when the pump is in the bypass mode. The pressure-sensitive member has a first response to a water pressure occurring during the bypass mode and a second response to a water pressure occurring during the through mode. The pressure washer further includes a line of communication between the pressure-sensitive member and the throttle. When the pressure-sensitive member has the first response, the throttle sets a first engine speed, and when the pressure-sensitive member has the second response, the throttle sets a second engine speed.
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