Cooling system for an internal combustion engine, and engine incorporating same
First Claim
1. A piston cooling system in an internal combustion engine, the engine comprising:
- a crankshaft;
a crankcase comprising at least one journal wall that journals the crankshaft;
a cylinder block comprising at least one cylinder bore; and
a piston reciprocally disposed in the at least one cylinder bore,the piston cooling system comprising;
an oil jet disposed in a wall portion of said crankcase;
an oil supply passage formed in the crankcase in fluid communication with said oil jet, for routing oil from a hydraulic supply source oil to the oil jet; and
an oil reservoir formed in the at least one journal wall, the oil reservoir communicating with the oil supply passage,wherein said piston cooling system is configured to jet oil from the oil supply passage to the piston via the oil jet during operation of said engine.
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Accused Products
Abstract
An internal combustion engine is provided with an internal piston cooling system that jets oil from an oil jet onto a surface of a piston during engine operation, to effectively cool the piston. In the piston cooling system of the internal combustion engine, each piston being arranged to reciprocate in a cylinder bore of a cylinder block, and oil is jetted from individual oil jets to each piston, respectively. An oil reservoir is formed in a crankcase journal wall, that journals a crankshaft of the engine. In the crankcase, oil supply passages are provided for supplying oil from a hydraulic supply source to the oil reservoir, and in turn, oil is operatively supplied from the oil reservoir to the oil jets via a passageway.
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Citations
14 Claims
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1. A piston cooling system in an internal combustion engine, the engine comprising:
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a crankshaft; a crankcase comprising at least one journal wall that journals the crankshaft; a cylinder block comprising at least one cylinder bore; and a piston reciprocally disposed in the at least one cylinder bore, the piston cooling system comprising; an oil jet disposed in a wall portion of said crankcase; an oil supply passage formed in the crankcase in fluid communication with said oil jet, for routing oil from a hydraulic supply source oil to the oil jet; and an oil reservoir formed in the at least one journal wall, the oil reservoir communicating with the oil supply passage, wherein said piston cooling system is configured to jet oil from the oil supply passage to the piston via the oil jet during operation of said engine. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An internal combustion engine provided with an internal piston cooling system, the engine comprising:
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a crankshaft; a crankcase comprising plural journal walls that journal the crankshaft therebetween; a cylinder block comprising plural parallel cylinder bores; and a piston reciprocally disposed in each cylinder bore, respectively, the piston cooling system comprising; an oil jet provided for dispensing oil to each respective cylinder bore; an oil supply passage formed in the crankcase for supplying oil from a hydraulic supply source oil to each oil jet; and an oil reservoir formed in the at least one journal wall that communicates with the oil supply passage, wherein said piston cooling system is configured to jet oil from the oil supply passage to each of said pistons, via the respective oil jets, during operation of said engine. - View Dependent Claims (10, 11, 12, 13, 14)
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Specification