Coolant valve system for internal combustion engine and method

Details Coolant valve system for internal combustion engine and method Coolant valve system for internal combustion engine and method

2007-11-27

2007-11-27

Cronin, Stephen K. (Department: 3747)

Internal-combustion engines

Cooling

Automatic coolant flow control

C123S041290, C123S041440, C123S568120

Reexamination Certificate

active

11330523

ABSTRACT:
An internal combustion engine (200) includes a coolant pump (212) having a pump outlet (214), and a first exhaust gas recirculation (EGR) cooler (206) fluidly connected to the pump outlet (214). A crankcase (202) is fluidly connected in parallel with the EGR cooler (206) to the pump outlet (214) for receiving coolant therefrom. A cylinder head (204) is fluidly connected to the crankcase (202) for receiving coolant therefrom. A thermostat (232) is fluidly connected between the cylinder head (204) and the coolant pump (212). A valve system (238) has a first selectable position fluidly connecting the flow from the first EGR cooler (206) to the flow in the cylinder head (204), and a second selectable position fluidly connecting the flow from the first EGR cooler (206) to the thermostat (232) in bypassing relation to the cylinder head (204). Each of the first or second position is effected in response to an engine operating parameter.

REFERENCES:
patent: 7089890 (2006-08-01), Obidi

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