# US 8,464,668 B2 · Vehicle cooling system with directed flows > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,464,668 B2 - Document ID: US8464668B2 - Status: Granted - Kind: B2 - Application number: 13/453,611 - Filed: 2012-04-23 - Published: 2012-08-16 - Granted: 2013-06-18 - Earliest claimed: 2006-05-08 - Assignees: MAGNA Powertrain AG & Co KG - Applicants: Pasquale DiPaola; Malcolm J. Clough; Robert Scotchmer - Inventors: Pasquale DiPaola; Malcolm J. Clough; Robert Scotchmer - Web page: https://patentgrep.com/patent/US8464668B2 ## CPC - F01P 7/16: by thermostatic control - F01P 7/165: {characterised by systems with two or more loops} - F01P 11/028: {Deaeration devices} - F01P 11/08: Arrangements of lubricant coolers (in lubrication apparatus F01M) - F01P 2003/027: {Cooling cylinders and cylinder heads in parallel} - F01P 2060/08: Cabin heater - F01P 2070/04: using electrical heating elements - Y10T 137/2617: Bypass or relief valve biased open - F01P: COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES (arrangements in connection with cooling of propulsion units in vehicles B60K11/00; heat-transfer, heat-exchange or heat-storage materials C09K5/00; {cooling of gas-turbine engines F02C7/12}; heat exchange in general, radiators F28) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A cooling system for internal combustion engines provides directed flows of heated or cooled coolant to various engine components and/or accessories as needed. By providing directed flows, the overall coolant flow volume is reduced from that of conventional cooling systems, allowing for a smaller capacity water pump to be employed which results in a net energy savings for the engine. Further, by reducing the overall coolant flow volume, the hoses and/or galleries required for the directed flows are reduced from those of conventional cooling systems, providing a cost savings and a weight savings. Finally, by preferably employing an impellor type water pump, the expense of an electric water pump and its associated control circuitry can be avoided. The direct flows are established by a multifunction valve which, in a preferred implementation, comprises a two-plate valve wherein each plate is operated by a wax motor. ## Claims ### Claim 1 A circulating coolant cooling system for an internal combustion engine, comprising: a multifunction valve having a plurality of inlet ports and output ports, a first moveable plate, a second moveable plate and an operator for moving the plates to selectively open and close passageways interconnecting the inlet and output ports, the first moveable plate selectively restricting and unrestricting fluid flow through a first one of the plurality of inlet ports and first and second ones of the plurality of output ports, the second moveable plate selectively restricting and unrestricting fluid flow through second and third ones of the plurality of inlet ports; a radiator connected between one of said inlet ports and one of said outlet ports; a pump for pumping coolant, the pump connected between one of said inlet ports and one of said outlet ports; a water jacket in an engine block, the water jacket connected between one of said inlet ports and one of said outlet ports; a water jacket in an engine cylinder head, the cylinder head water jacket connected between one of said inlet ports and one of said outlet ports; a heater core for a heater in a passenger compartment, the heater core connected between one of said inlet ports and one of said outlet ports; a degas bottle to capture and retain gases entrapped in the coolant, the degas bottle connected between one of said inlet ports and one of said outlet ports; and a heat exchanger for heating and cooling lubricating oil, the heat exchanger connected between one of said inlet ports and one of said outlet ports, wherein the multifunction valve interconnects the engine and cooling system components and operates to permit and inhibit flows of coolant as necessary for thermal management of the engine. ### Claim 2 (depends on 1) The circulating coolant cooling system of claim 1, wherein each plate of the multifunction valve is operated by a wax motor. ### Claim 3 (depends on 2) The circulating coolant cooling system of claim 2, wherein each wax motor further includes an electric heater to permit the operation of the wax motors to be overridden electrically. ### Claim 4 (depends on 1) The circulating coolant cooling system of claim 1, wherein the operator includes an electric motor driving a threaded shaft. ### Claim 5 (depends on 1) The circulating coolant cooling system of claim 1, wherein the pump is sized to output substantially 2.75 liters per second at a rotational speed of 7700 RPM. ### Claim 6 (depends on 1) The circulating coolant cooling system of claim 1, further including an EGR valve cooler connected between one of the inlet ports and the outlet ports. ### Claim 7 (depends on 1) The circulating coolant cooling system of claim 1, wherein the valve blocks the flow of coolant through the heater core to increase flow through the radiator when a predetermined coolant temperature is exceeded. ### Claim 8 (depends on 1) The circulating coolant cooling system of claim 1, wherein the valve modulates the flow of coolant to the radiator, the cylinder head water jacket and the engine block water jacket to a variety of different flow rates ranging from zero flow to a maximum flow capacity of the pump. ### Claim 9 (depends on 1) The circulating coolant cooling system of claim 1, wherein the valve increases a flow of coolant to the heat exchanger when a predetermined lubricating oil temperature is exceeded. ### Claim 10 A circulating coolant cooling system for an internal combustion engine, comprising: a multifunction valve having a plurality of inlet ports and output ports, a first moveable plate, a second moveable plate and an operator for moving the plates to selectively open and close passageways interconnecting the inlet and output ports; a radiator connected between a first one of said inlet ports and a first one of said outlet ports; a pump for pumping coolant, the pump connected between said first one of said inlet ports and a second one of said outlet ports; a water jacket in an engine block, the water jacket connected between a second one of said inlet ports and said second one of said outlet ports; a water jacket in an engine cylinder head, the cylinder head water jacket connected between a third one of said inlet ports and said second one of said outlet ports; a heater core for a heater in a passenger compartment, the heater core connected between said first one of said inlet ports and a third one of said outlet ports; and a degas bottle to capture and retain gases entrapped in the coolant, the degas bottle connected between a fourth one of said inlet ports and said first one of said outlet ports, wherein the multifunction valve is operable to modulate a flow of coolant through the heater core ranging from no flow to a maximum flow capacity of the pump. ### Claim 11 (depends on 10) The circulating coolant cooling system of claim 10, wherein the valve blocks the flow of coolant to the radiator when the heater core receives the maximum flow capacity of the pump. ### Claim 12 (depends on 10) The circulating coolant cooling system of claim 10, wherein the valve blocks the flow of coolant through the heater core to increase flow through the radiator when a predetermined coolant temperature is exceeded. ### Claim 13 (depends on 10) The circulating coolant cooling system of claim 10, wherein the valve modulates the flow of coolant to the radiator, the cylinder head water jacket and the engine block water jacket. ### Claim 14 (depends on 13) The circulating coolant cooling system of claim 13, wherein the modulated flow through the radiator is controllable through a range of no flow to a maximum pump flow. ### Claim 15 (depends on 10) The circulating coolant cooling system of claim 10, further including an EGR valve cooler connected between one of the inlet ports and the outlet ports. ### Claim 16 A circulating coolant cooling system for an internal combustion engine, comprising: a multifunction valve having a plurality of inlet ports and output ports, a first moveable plate, a second moveable plate and an operator for moving the plates to selectively open and close passageways interconnecting the inlet and output ports, the first moveable plate selectively restricting and unrestricting fluid flow through a first one of the plurality of inlet ports and first and second ones of the plurality of output ports, the second moveable plate selectively restricting and unrestricting fluid flow through second and third ones of the plurality of inlet ports; a radiator connected between one of said inlet ports and one of said outlet ports; a pump for pumping coolant, the pump connected between one of said inlet ports and one of said outlet ports; a water jacket in an engine block, the water jacket connected between one of said inlet ports and one of said outlet ports; a water jacket in an engine cylinder head, the cylinder head water jacket connected between one of said inlet ports and one of said outlet ports; a heater core for a heater in a passenger compartment, the heater core connected between one of said inlet ports and one of said outlet ports; a degas bottle to capture and retain gases entrapped in the coolant, the degas bottle connected between one of said inlet ports and one of said outlet ports; and an EGR valve cooler connected between one of the inlet ports and outlet ports. ### Claim 17 (depends on 16) The circulating coolant cooling system of claim 16, wherein the operator includes an electric motor. ### Claim 18 (depends on 16) The circulating coolant cooling system of claim 16, wherein the valve blocks the flow of coolant through the heater core to increase flow through the radiator when a predetermined coolant temperature is exceeded. ### Claim 19 (depends on 16) The circulating coolant cooling system of claim 16, wherein the valve modulates the flow of coolant to the radiator, the cylinder head water jacket and the engine block water jacket to a variety of different flow rates ranging from zero flow to a maximum flow capacity of the pump. ### Claim 20 (depends on 10) The circulating coolant cooling system of claim 10, wherein the first moveable plate selectively restricts and unrestricts fluid flow through said first one of the inlet ports and said first and second ones of the outlet ports, and wherein the second moveable plate selectively restricts and unrestricts fluid flow through said second and third ones of the inlet ports.