A cooling system for a motor vehicle engine

Engine cooling system with independent control of coolant supply through a cylinder head and a cylinder block

A cooling system for an internal combustion engine comprises a cooling circuit including passages formed in a cylinder block 6 and in a cylinder head 10 of the engine and at least one conduit connecting the passages in the cylinder block and cylinder head to an inlet to a pump 1 used to circulate the coolant through the cooling circuit, where the pump is a variable flow rate pump controlled by an electronic control unit. The coolant passages in the cylinder block are connected by a first coolant supply conduit 5 to an outlet from the pump, the coolant passages in the cylinder head are connected by a second coolant supply conduit 4 to an outlet from the pump, and the flow through at least one of the first and second coolant supply conduits is controlled by an electronically controlled flow control valve 2, (103, figure 2) operably connected to an electronic controller which is used to control the opening and closing of the electronically controlled flow control valve. The flow through the ...

An engine cooling system

A Cooling System for a Motor Vehicle Engine

A cooling system for an internal combustion engine 1 has a coolant circuit through which a coolant is circulated by a pump 2, and includes at least one electronically controlled flow control valve 9 located at a coolant outlet from the engine. The system may include an actuator (10 fig 2) and at least one sensor 11 associated with each electronically controlled valve. The system may also include a thermostat 12, a radiator 15, a degas reservoir 14, and a cabin heater 13. The valve actuator may be operated by engine vacuum, and controlled by a valve control unit 17 which receives control signals from an electronic control module 18. The electronic control module may receive a variety of input signals, such as vehicle parameters 19, power-train parameters 20, cooling parameters 21, etc. The condition of the valve may be monitored to determine the degree of valve opening, by use of a sensor which may comprise a rotary potentiometer. The positioning of the valve at the outlet of the engine ...