| 主权项 |
1. A hydraulic system for a vehicle, comprising:
a variable displacement pump configured to pressurize a fluid based on a pump stroke, wherein the variable displacement pump includes an output, a swash plate, and a feedback valve positioned to control an orientation of the swash plate, and wherein the pump stroke varies based on the orientation of the swash plate; a clutch positioned to selectively couple the variable displacement pump with an engine when engaged and selectively decouple the variable displacement pump from the engine when disengaged; an actuator coupled to the output of the variable displacement pump with a pressure line; a main valve disposed along the pressure line; a load sensing line coupling the main valve to the feedback valve of the variable displacement pump; a load valve disposed along the load sensing line, wherein the load valve includes a movable element configured to limit flow from the main valve to the feedback valve when disengaged; and a controller coupled to the variable displacement pump and the clutch, wherein the controller is configured to generate a first command signal to disengage the load valve and thereby decrease the pump stroke and thereafter generate a second command signal to disengage the clutch. |
