Lubricating system for engine
First Claim
1. A lubricating system for a two-cycle crankcase compression internal combustion engine comprised of a cylinder, at least one cylinder bore formed by said cylinder, a piston supported for reciprocation within said cylinder bore, a crankshaft rotatably journalled in a crankshaft chamber formed at one end of said cylinder bore and driven by said piston, a cylinder head affixed to said cylinder at the other end of said cylinder bore forming with said piston and said cylinder bore a combustion chamber the volume of which varies upon reciprocation of said piston, an induction system for supplying a charge to said crankcase chamber, a reed type check valve in said induction system for permitting air to flow into said crankcase chamber from said induction system means and precluding reverse flow from said crankcase chamber into said induction system means, a first lubricating system for delivering lubricant directly to said cylinder bore for lubricating the sliding surfaces of said piston and said cylinder bore, a second lubricating system for delivering lubricant to said induction system upstream of said reed type check valve, and means for controlling the amount of lubricant supplied by said first and said second lubricating systems independently of each other in response to engine running conditions.
1 Assignment
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Accused Products
Abstract
A motor vehicle containing a two-cycle, crankcase compression, internal combustion engine having direct lubricating systems for supplying lubricant to the sliding surfaces of the piston and cylinder bore for each cylinder of the engine, separate pumps for delivering lubricant to the crankshaft bearings associated with each cylinder of the engine and a system for delivering lubricant to the engine for the remaining components through the induction system. Various arrangements are disclosed for delivering the lubricant to the induction system including systems having a separate pump for each cylinder and combined arrangements.
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Citations
14 Claims
- 1. A lubricating system for a two-cycle crankcase compression internal combustion engine comprised of a cylinder, at least one cylinder bore formed by said cylinder, a piston supported for reciprocation within said cylinder bore, a crankshaft rotatably journalled in a crankshaft chamber formed at one end of said cylinder bore and driven by said piston, a cylinder head affixed to said cylinder at the other end of said cylinder bore forming with said piston and said cylinder bore a combustion chamber the volume of which varies upon reciprocation of said piston, an induction system for supplying a charge to said crankcase chamber, a reed type check valve in said induction system for permitting air to flow into said crankcase chamber from said induction system means and precluding reverse flow from said crankcase chamber into said induction system means, a first lubricating system for delivering lubricant directly to said cylinder bore for lubricating the sliding surfaces of said piston and said cylinder bore, a second lubricating system for delivering lubricant to said induction system upstream of said reed type check valve, and means for controlling the amount of lubricant supplied by said first and said second lubricating systems independently of each other in response to engine running conditions.
- 4. A lubricating system for a two-cycle crankcase compression internal combustion engine comprised of a cylinder, at least one cylinder bore formed by said cylinder, a piston supported for reciprocation within said cylinder bore, a crankshaft rotatably journalled in a crankshaft chamber formed at one end of said cylinder bore and driven by said piston, a cylinder head affixed to said cylinder at the other end of said cylinder bore forming with said piston and said cylinder bore a combustion chamber the volume of which varies upon reciprocation of said piston, an induction system for supplying a charge to said crankcase chamber, a reed type check valve in said induction system for permitting air to flow into said crankcase chamber from said induction system means and precluding reverse flow from said crankcase chamber into said induction system means, a first lubricating system for delivering lubricant directly to said cylinder bore for lubricating the sliding surfaces of said piston and said cylinder bore, and a second lubricating system for delivering lubricant to said induction system upstream of said reed type check valve, said first and second lubricating systems each including respective first and second lubricating pumps.
- 7. A lubricating system for a two-cycle crankcase compression internal combustion engine comprised of a cylinder, a plurality of cylinder bores formed by said cylinder, a plurality of pistons each supported for reciprocation within a respective one of said cylinder bores, a crankshaft rotatably journalled in a plurality of crankshaft chambers each formed at one end of a respective one of said cylinder bores and driven by said pistons, a cylinder head affixed to said cylinder at the other end of said cylinder bores forming with said pistons and said cylinder bores a plurality of combustion chambers the volume of which varies upon reciprocation of said pistons, an induction system for supplying a charge to said crankcase chamber, reed type check valves in said induction system for permitting air to flow into each of said crankcase chambers from said induction system means and precluding reverse flow from said crankcase chambers into said induction system means, a first lubricating system for delivering lubricant directly to said cylinder bores for lubricating the sliding surfaces of said piston and said cylinder bore, and a second lubricating system for delivering lubricant to said induction system upstream of said reed type check valves, each lubricating system including a plurality of lubricating pumps, one for each cylinder bore.
- 10. A lubricating system for a two-cycle crankcase compression internal combustion engine comprised of a cylinder, at least one cylinder bore formed by said cylinder, a piston supported for reciprocation within said cylinder bore, a crankshaft rotatably journalled in a crankshaft chamber formed at one end of said cylinder bore and driven by said piston, a cylinder head affixed to said cylinder at the other end of said cylinder bore forming with said piston and said cylinder bore a combustion chamber the volume of which varies upon reciprocation of said piston, an induction system for supplying a charge to said crankcase chamber, a reed type check valve in said induction system for permitting air to flow into said crankcase chamber from said induction system means and precluding reverse flow from said crankcase chamber into said induction system means, a first lubricating system for delivering lubricant directly to said cylinder bore for lubricating the sliding surfaces of said piston and said cylinder bore, a second lubricating system for delivering lubricant to said induction system upstream of said reed type check valve, and a third lubricating system for delivering lubricant to said crankshaft.
Specification