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US 5,699,760 AGranted
Cooling system for internal combustion engine
AssigneeFord Global Technologies, LLC
InventorsJialin Yang, George Fredric Leydorf, Jr., Richard Walter Anderson
Life of this patent
Estimating the term…
Abstract
A cooling system for a reciprocating multicylinder internal combustion engine includes discharge passages for conducting coolant from the cylinder block to specific regions of the cylinder head so as to increase the localized heat transfer coefficient between coolant and the cylinder head. Flow through the cylinder head is separated into an intake side flow and a central and exhaust side flow so as to promote better heat transfer and to allow the engine to be operated with a higher compression ratio and greater spark advance.
Claims15
A cooling system for a reciprocating multicylinder internal combustion engine, comprising:
- a radiator;
- a pump for receiving coolant from the radiator;
- a cylinder head having a plurality of intake and exhaust ports formed therein, with at least one intake port and one exhaust port servicing each cylinder, with said cylinder head further having a plurality of fuel injectors and spark plugs with at least one fuel injector and one spark plug being housed in a central land extending over each cylinder;
- a first cylinder head coolant passage for receiving coolant from the pump, with said first cylinder head coolant passage extending along substantially the entire length of the cylinder head in proximity to the intake ports;
- a second cylinder head coolant passage extending along substantially the entire length of the cylinder head in proximity to the central lands which house the fuel injectors and the spark plugs;
- and
- a cylinder block coolant distribution system comprising:
- a coolant inlet for receiving coolant discharged by the first cylinder head coolant passage;
- at least one primary discharge passage for providing a primary flow of coolant from the cylinder block to the second cylinder head cooling passage, and
- a plurality of secondary discharge passages for conducting coolant from the cylinder block to specific regions of the second cylinder head cooling passage.
7 more elements
A cooling system for a reciprocating multicylinder internal combustion engine, comprising:
- a radiator;
- a pump for receiving coolant from the radiator;
- a cylinder block having first and second ends;
- a cylinder head having a plurality of intake and exhaust ports formed therein, with at least one intake port and one exhaust port servicing each cylinder, with said cylinder head further having a plurality of fuel injectors and spark plugs with at least one fuel injector and one spark plug being housed in a central land extending over each cylinder;
- a first cylinder head coolant passage for receiving coolant from the pump, with said first cylinder head coolant passage extending along substantially the entire length of the cylinder head in proximity to the intake ports, with said first cylinder head coolant passage discharging coolant directly into the first end of the cylinder block;
- a second cylinder head coolant passage extending along substantially the entire length of the cylinder head in proximity to the central lands which house the fuel injectors and the spark plugs;
- and
- a cylinder block coolant distribution system comprising:
- a coolant inlet located in the first end of the block for receiving coolant discharged by the first cylinder head coolant passage, with said coolant inlet communicating with a whole block coolant passage extending the length of the cylinder block from the first end to the second end;
- a primary discharge passage for providing a primary flow of coolant from a port located in the second end of the cylinder block to the second cylinder head cooling passage;
- and
- a plurality of secondary discharge passages for conducting coolant from the cylinder block to specific regions of the second cylinder head cooling passage.
9 more elements
A cooling system for a reciprocating multicylinder internal combustion engine, comprising:
- a radiator;
- a pump for receiving coolant from the radiator;
- a cylinder block having first and second ends;
- a cylinder head having a plurality of intake and exhaust ports formed therein, with at least one intake port and one exhaust port servicing each cylinder, with said cylinder head further having a plurality of fuel injectors and spark plugs with at least one fuel injector and one spark plug servicing each cylinder;
- a first cylinder head coolant passage for receiving coolant from the pump, with said first cylinder head coolant passage extending along substantially the entire length of the cylinder head in proximity to the intake ports, with said first cylinder head coolant passage discharging coolant directly into the first end of the cylinder block;
- a second cylinder head coolant passage extending along substantially the entire length of the cylinder head in proximity to the central lands which house the fuel injectors and the spark plugs;
- and
- a cylinder block coolant distribution system comprising:
- a coolant inlet located in the first end of the block for receiving coolant discharged by the first cylinder head coolant passage, with said coolant inlet communicating with a block coolant passage extending the length of the cylinder block from the first end to the second end;
- a primary discharge passage for providing a primary flow of coolant from a port located in the second end of the cylinder block to the second cylinder head cooling passage;
- and
- a plurality of secondary discharge passages for conducting coolant from the cylinder block to specific regions of the second cylinder head cooling passage., with said secondary discharge passages conduct coolant into impingement with baffles extending into the second cylinder head cooling passage in a direction toward the fire deck of the cylinder head, with said baffles and said secondary discharge passages cooperating to define a fluidic nozzle for establishing two dimensional flow in the bulk coolant flowing through the second cylinder head cooling passage past the baffles and the secondary discharge passages.
9 more elements
Dependencies are inferred from the claim text.