Method of improving piston ring seal by start-up lubrication
First Claim
1. A method of preventing ring seal impairment of an internal combustion engine, said engine having at least one cylinder with an operatively associated piston positioned therewithin with each piston having at least two piston ring grooves extending therearound and a piston ring mounted in each piston ring groove, whereby motion from piston movement in the cylinder is transmitted to a crankshaft, comprising the steps of:
- (a) applying a start-up lubricating composition to a top piston ring of each piston of the engine, wherein the start-up lubricating composition consists essentially of (1) from about 25% to about 60% molybdenum disulfide, tungsten disulfide, or a mixture thereof, (2) from about 0.5% to about 5% boron nitride, (3) from about 0.8% to about 6% inorganic fluoride, and (4) the balance a carrier fluid; and
(b) rotating the crankshaft at least one rotation,whereby a film of the start-up lubrication is spread substantially evenly over each piston ring and cylinder wall thereby preventing ring seal impairment during subsequent powered rotations of the crankshaft for achieving lessened power loss and greater engine life.
0 Assignments
0 Petitions
Accused Products
Abstract
A method for ensuring a good ring seal is for use in assembling a new engine or rebuilding an engine. The method comprises in each aspect use of a start-up lubricating composition comprised of a powder blend of (a) molybdenum disulfide, tungsten disulfide or a mixture thereof, (b) boron nitride, and (c) an inorganic fluoride, all suspended in a carrier fluid.
-
Citations
14 Claims
-
1. A method of preventing ring seal impairment of an internal combustion engine, said engine having at least one cylinder with an operatively associated piston positioned therewithin with each piston having at least two piston ring grooves extending therearound and a piston ring mounted in each piston ring groove, whereby motion from piston movement in the cylinder is transmitted to a crankshaft, comprising the steps of:
-
(a) applying a start-up lubricating composition to a top piston ring of each piston of the engine, wherein the start-up lubricating composition consists essentially of (1) from about 25% to about 60% molybdenum disulfide, tungsten disulfide, or a mixture thereof, (2) from about 0.5% to about 5% boron nitride, (3) from about 0.8% to about 6% inorganic fluoride, and (4) the balance a carrier fluid; and (b) rotating the crankshaft at least one rotation, whereby a film of the start-up lubrication is spread substantially evenly over each piston ring and cylinder wall thereby preventing ring seal impairment during subsequent powered rotations of the crankshaft for achieving lessened power loss and greater engine life. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A method of preventing ring seal impairment during initial start-up of a new or rebuilt internal combustion engine prior to fully assembling the engine, said engine having at least one cylinder with an operatively associated piston positioned within each cylinder, each said piston having at least two piston ring grooves extending therearound and a piston ring mounted in each piston ring groove whereby motion from piston movement in the cylinder is transmitted to a crankshaft, comprising the steps of:
-
(a) adding a start-up lubricating composition to a top of each cylinder of the engine, wherein the start-up composition consists essentially of (1) from about 25% to about 60% molybdenum disulfide, tungsten disulfide, or a mixture thereof, (2) from about 0.5% to about 5% boron nitride, (3) from about 0.8% to about 6% inorganic fluoride, and (4) the balance a carrier fluid; (b) introducing a pressurized gas to a top of each cylinder for forcing the start-up lubricating composition to the at least a top piston ring in the cylinder; and (c) rotating the crankshaft at least one rotation, whereby a film of the start-up lubricating composition is spread substantially evenly over each piston ring and cylinder wall thereby preventing ring seal impairment during subsequent rotations of the crankshaft for achieving lessened power loss and greater engine life. - View Dependent Claims (10, 11, 12)
-
-
13. A method of preventing ring seal impairment during initial start-up of a new or rebuilt internal combustion engine subsequent to fully assembling the engine, said engine having at least one cylinder with an operatively associated piston positioned within each cylinder, each said piston having at least two piston ring grooves extending therearound and a piston ring mounted in each piston ring groove whereby motion from piston movement in the cylinder is transmitted to a crankshaft, comprising the steps of:
-
(a) adding a start-up lubricating composition to a top of each cylinder of the engine by introducing it into the combustion chamber of said cylinder, wherein the start-up composition consists essentially of (1) from about 25% to about 60% molybdenum disulfide, tungsten disulfide, or a mixture thereof, (2) from about 0.5% to about 5% boron nitride, (3) from about 0.8% to about 6% inorganic fluoride, and (4) the balance a carrier fluid; (b) introducing a pressurized gas to the top of each cylinder for forcing the start-up lubricating composition to at least a top piston ring in the cylinder; and (c) rotating the crankshaft at least one rotation, whereby a film of the start-up lubricating composition is spread substantially evenly over each piston ring and cylinder wall thereby preventing ring seal impairment during subsequent rotations of the crankshaft for achieving lessened power loss and greater engine life. - View Dependent Claims (14)
-
Specification