Patent ID: 8758197

Claim:
A vehicle idle stop system, comprising: an internal combustion engine; an automatic transmission; a first oil pump driven by said engine and generating hydraulic pressure which is supplied to a friction element of said automatic transmission; a second oil pump capable of operating and generating hydraulic pressure which is supplied to a friction element of said automatic transmission during an engine stop; a controller configured to control: said engine to stop when a predetermined engine stop condition is satisfied in a vehicle stop; and said second oil pump to supply hydraulic pressure to a predetermined friction element coupled to a forward starting gear of the automatic transmission, the hydraulic pressure to couple the predetermined friction element when the engine is automatically stopped by the controller and when a gear range of the automatic transmission is in a neutral range; and a first linear solenoid valve for controlling the hydraulic pressure supplied to the predetermined friction element; wherein the first linear solenoid valve evacuates the hydraulic pressure supplied to the predetermined friction element when the engine is automatically stopped; and wherein the engine is then automatically restarted in a state where the hydraulic pressure generated by the second oil pump is supplied to the predetermined friction element while the gear range of the automatic transmission is in the neutral range.