Charge bypass system for engine start

A method for reducing a parasitic load on an engine in a vehicle during a cold start, comprising:

• providing a temperature sensor, a charge pump having an outlet, a bypass system having at least one inlet and two outlets, a reservoir fluidly coupled to the charge pump, and a pressure relief valve coupled to one of the two outlets of the bypass system;
• measuring a speed of the engine;
• measuring a temperature of a fluid flowing through a charge system;
• determining if the measured speed is below a first threshold and the measured temperature is below a second threshold;
• diverting at least a portion of the fluid through a bypass system;
• and
• reducing the parasitic load on the engine.

A method of reducing a parasitic load on an engine through an engine start system, the engine start system including a charge pump, a charge relief valve, and a bypass system, the bypass system including an inlet, a first outlet, a second outlet, a solenoid, and a bypass valve, the method comprising:

• (a) measuring a speed of the engine;
• (b) measuring a temperature of a fluid in the engine start system with a sensor;
• (c) pressurizing the engine start system;
• (d) directing the fluid from the charge pump to the charge relief valve through the first outlet of the bypass system;
• (e) diverting a portion of the fluid through the second outlet;
• and
• (f) reducing the parasitic load on the engine.