Patent ID: 9021908
Filing Date: 2015-05-05
Classification: F04B,F16D,F16H,Y10T

Abstract:
1. A hydraulic system for a vehicle, comprising: an oil container; a first and a second clutch driving circuits connected in parallel; an internal pump with an inlet in fluid communication with the oil container and an outlet in fluid communication with the first and second clutch driving circuits; a first check valve connected in series with the internal pump; an external pump with an inlet in fluid communication with the oil container and an outlet in fluid communication with the first and second clutch driving circuits; a second check valve connected in series with the external pump, wherein the first check valve and the internal pump are connected in parallel with the second check valve and the external pump between the oil container and the first and second clutch driving circuits; a third check valve connected in parallel with the internal pump; a pressure regulating valve connected in parallel with the internal pump for providing lubricating oil to the driving system; and a fourth check valve connected between the pressure regulating valve and the outlet of the internal pump.