# US 2014/0196674 A1 · Liquid-cooled internal combustion engine with liquid-cooled cylinder head and with liquid-cooled cylinder block > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0196674 A1 - Document ID: US20140196674A1 - Status: Published application - Kind: A1 - Application number: 14/139,083 - Filed: 2013-12-23 - Published: 2014-07-17 - Earliest claimed: 2013-01-11 - Assignees: Ford Global Technologies, LLC - Applicants: Ford Global Technologies, LLC - Inventors: Hans Guenter Quix - Web page: https://patentgrep.com/patent/US20140196674A1 ## CPC - F01P 7/14: the coolant being liquid - F01P 3/02: Arrangements for cooling cylinders or cylinder heads - F02F 1/40: cylinder heads with means for directing, guiding, or distributing liquid stream - F01P 2003/027: {Cooling cylinders and cylinder heads in parallel} - F01P 2060/08: Cabin heater - F01P 2060/16: Outlet manifold - 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) - F02F: CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES ## Abstract One approach to provide engine cooling for an internal combustion engine includes pumping coolant from a pump output, in parallel, directly to a block and a head upper coolant jacket; flowing coolant from the block directly to a head lower coolant jacket; discharging coolant from the upper and lower jackets only to a control block; and selectively directing cooling from the control block to each of: a cabin heater; radiator bypass line; and the radiator. In this way, an increased demand for pre-warmed coolant can be met, for example in the case of low outside temperatures. ## Claims ### Claim 1 An engine method, comprising: pumping coolant from a pump output, in parallel, directly to a block and a head upper coolant jacket; flowing coolant from the block directly to a head lower coolant jacket; discharging coolant from the upper and lower jackets only to a control block; selectively directing cooling from the control block to each of: a cabin heater; the radiator bypass; and the radiator. ### Claim 2 (depends on 1) The method of claim 1 wherein the engine is a direct injection engine with an integrated exhaust manifold. ### Claim 3 (depends on 2) The method of claim 2 wherein the engine includes an exhaust gas recirculation system. ### Claim 4 An engine method, comprising: pumping coolant from a pump output, in parallel, directly to an engine cylinder block and a cylinder head upper coolant jacket; flowing coolant from the cylinder block directly to a cylinder head lower coolant jacket; discharging coolant from the upper and lower jackets only to a control unit; selectively directing cooling from the control unit to each of: 1) a cabin heater, and then to a radiator bypass, 2) the radiator bypass, and 3) the radiator. ### Claim 5 (depends on 4) The method of claim 4 wherein the coolant from the lower coolant jacket goes only to the radiator bypass and the radiator. ### Claim 6 (depends on 5) The method of claim 5 wherein the coolant from the upper coolant jacket goes only to the cabin heater. ### Claim 7 (depends on 4) The method of claim 4 wherein the cylinder head includes an integrated exhaust manifold having a combined exhaust gas output leading directly to a turbine of a turbocharger coupled to the engine. ### Claim 8 (depends on 6) The method of claim 6 further comprising adjusting a valve in the control unit via an electromechanical actuator controlled by a control system reading information from vehicle sensors, the actuator controlled responsive to code stored in non-transitory memory. ### Claim 9 (depends on 8) The method of claim 8 further comprising a coolant-operated vehicle interior heater upstream of a coolant-operated cooling device in a coolant line leading from the control unit and returning to the radiator bypass line. ### Claim 10 A liquid-cooled internal combustion engine, comprising: at least one cylinder head and one cylinder block, wherein the at least one cylinder head is equipped with at least one integrated coolant jacket, said first coolant jacket having, at the inlet side, a first supply opening for the feed of coolant and, at the outlet side, a first discharge opening for the discharge of the coolant, the cylinder block is equipped with at least one integrated coolant jacket, said coolant jacket, which is associated with the block, having, at the inlet side, a second supply opening for the feed of coolant and, at the outlet side, a second discharge opening being provided for the discharge of the coolant, and, the discharge openings are connectable to the supply openings to form a coolant circuit, wherein the first discharge opening is connectable to the first supply opening via a heating circuit line in which there is arranged a coolant-operated vehicle interior heater, the second discharge opening is connectable to the second supply opening via a recirculation line in which there is arranged a heat exchanger, and the second discharge opening is connectable to the second supply opening via a bypass line. ### Claim 11 (depends on 10) The liquid-cooled internal combustion engine as claimed in claim 10, wherein the second discharge opening can be connected to the second supply opening via the heating circuit line. ### Claim 12 (depends on 11) The liquid-cooled internal combustion engine as claimed in claim 11, wherein the heating circuit line issues into the bypass line. ### Claim 13 (depends on 12) The liquid-cooled internal combustion engine as claimed claim 12, wherein a coolant-operated cooling device of an exhaust-gas recirculation system is provided in the heating circuit line upstream of the vehicle interior heater. ### Claim 14 (depends on 10) The liquid-cooled internal combustion engine as claimed in claim 10, wherein the second discharge opening, provided at the outlet side, for discharging the coolant is arranged in the cylinder block. ### Claim 15 (depends on 13) The liquid-cooled internal combustion engine as claimed in claim 13, wherein the at least one cylinder head is equipped with at least two integrated and mutually separate coolant jackets, wherein the second coolant jacket is connected, in order to be supplied with coolant, to the coolant jacket associated with the block, and the second discharge opening, provided at the outlet side, for the discharge of the coolant is arranged in the cylinder head. ### Claim 16 (depends on 10) The liquid-cooled internal combustion engine as claimed in claim 10, wherein a pump for delivering coolant is provided upstream of the supply openings. ### Claim 17 (depends on 10) The liquid-cooled internal combustion engine as claimed in claim 10, wherein, at the outlet side, there is provided a coolant control unit which has two inputs and at least three outputs, wherein a first input is connected to the first discharge opening, a second input is connected to the second discharge opening, a first output is connected to the heating circuit line, a second output is connected to the bypass line, and a third output is connected to the recirculation line. ### Claim 18 (depends on 17) The liquid-cooled internal combustion engine as claimed in claim 17, wherein the coolant control unit comprises a setting element which is adjustable. ### Claim 19 (depends on 18) The liquid-cooled internal combustion engine as claimed in claim 18, wherein the setting element, when in a rest position, separates the two inputs from the at least three outputs, such that the coolant circuit both through the cylinder head and also through the cylinder block is shut off. ### Claim 20 (depends on 19) The liquid-cooled internal combustion engine as claimed in claim 19, wherein the setting element, when in a first working position, connects the first input to the first output such that a coolant circuit through the cylinder head is open via the heating circuit line. wherein the setting element, in a second working position, connects the first input to the first output such that a coolant circuit through the cylinder head is open via the heating circuit line, and connects the second input to the second output such that a coolant circuit through the cylinder block is open via the bypass line, and wherein the setting element, in a third working position, connects the first input to the first output such that a coolant circuit through the cylinder head is open via the heating circuit line, and connects the second input to the third output such that a coolant circuit through the cylinder block is open via the recirculation line, and wherein the setting element, when in a fourth working position, connects the first input and the second input to the first output such that a coolant circuit through the cylinder head and a coolant circuit through the cylinder block are open via the heating circuit line.