US Patent 9494170 Clutched hydraulic system for a refuse vehicle

A hydraulic system for a vehicle includes a variable displacement pump configured to pressurize a fluid based on a pump stroke, a clutch, and a controller that is coupled to the variable displacement pump and the clutch. The clutch is 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. The controller is configured to generate a first command signal to decrease the pump stroke and thereafter generate a second command signal to disengage the clutch.