Oil Pump: Notes
- The oil pump is belt-driven from the engine. The oil flow is controlled in response to engine speed so that an adequately "heavy" steering effort is maintained during high-speed operation.
The oil pump is a variable capacity type vane pump which controls the delivery rate per rotation to match the engine speed. It is integrated with pump control valve and relief-valve.
- The vane pump consists of a rotor, cam rings, and eleven vanes.
When the rotor rotates, the vane located in each groove of the rotor is radially swung out by centrifugal force and pressed against the cam ring. The tip of the vane slides along the inner oval wall of the cam ring so that oil is delivered to the chamber formed by the rotor, cam ring and vane. Oil from the chamber is discharged into the oil circuit via the discharge port.