Abstract:
A four-cycle multi-cylinder engine includes a crankcase, a cylinder block, a crankshaft, and a gear-shift input shaft. The crankcase is vertically divided into an upper case and a lower case. The cylinder block is integrated with the crankcase. The crankshaft and the gear-shift input shaft are journaled to a contact surface of the crankcase. The cylinder block is inclined rearward such that an extended line intersects with a cylinder axis line of the cylinder block at an acute angle in an engine side view. The extended line connects respective central axes of the crankshaft and the gear-shift input shaft.
Abstract:
A four-cycle multi-cylinder engine includes a crankcase, a cylinder block, a crankshaft, and a gear-shift input shaft. The crankcase is vertically divided into an upper case and a lower case. The cylinder block is integrated with the crankcase. The crankshaft and the gear-shift input shaft are journaled to a contact surface of the crankcase. The cylinder block is inclined rearward such that an extended line intersects with a cylinder axis line of the cylinder block at an acute angle in an engine side view. The extended line connects respective central axes of the crankshaft and the gear-shift input shaft.
Abstract:
An oil tank and scavenge pipe assembly of a gas turbine engine comprises a tank, and a scavenge pipe having a discharge portion disposed inside the tank. The discharge portion comprises a first portion having first and second ends. The first end is adapted to connect to an oil return line for receiving a mixture of oil and air. A bend extends from the second end downstream thereof relative to a flow of the mixture of oil and air through the scavenge pipe. The bend is configured to cause stratification of the mixture of oil and air as the mixture of oil and air flows through it. An outlet downstream of the bend delivers the mixture of oil and air to the tank. A method of delivering an oil and air mixture to a rotating oil volume of a tank of a gas turbine engine is also presented.
Abstract:
The invention provides a lubricating composition containing a lubricating composition comprising an oil of lubricating viscosity and a polyester. The invention further relates to a method of lubricating a mechanical device (such as an internal combustion engine) with the lubricating composition. The invention further relates to the use of the polyester as a dispersant.
Abstract:
A hydraulic system of a transmission having a controller and a variable displacement pump. The pump includes an inlet and outlet and is adapted to be driven by a torque-generating mechanism. The system also includes a lube circuit fluidly coupled to the pump. A lube regulator valve is disposed in the lube circuit, such that the lube regulator valve is configured to move between at least a regulated position and an unregulated position. The regulated position corresponds to a regulated pressure in the lube circuit. A pressure switch is fluidly coupled to the lube regulator valve and configured to move between a first position and a second position, where the switch is disposed in electrical communication with the controller. A solenoid is disposed in electrical communication with the controller and is controllably coupled to the pump to alter the displacement of the pump.
Abstract:
A lubricating configuration in a two-stroke cycle, opposed-piston engine for a piston wristpin minimizes losses in oil pressure at the wristpin as the piston approaches bottom center and reduces the required oil supply pressure to the engine. The wristpin is constructed to absorb and store oil pressure energy when oil pressure at the wristpin is high, and to release that stored energy to pressurize the oil at the wristpin when connecting rod oil pressure is low.
Abstract:
A baffle for engine fluid cooling includes a fluid guide having a pair of side walls, a bottom wall, and a coolant fluid inlet. A channel receives a pair of heat exchangers such that one may be positioned proximate to or above a part of the bottom wall and the other may be positioned proximate to or above another part of the bottom wall. Some coolant entering the guide flows into the first heat exchanger and some coolant is passed under the first heat exchanger and subsequently into the second heat exchanger.
Abstract:
A rotary piston internal combustion engine of trochoidal type of construction with a piston slidably journalled and controlled via a synchronous transmission gear drive unit. An eccentric bearing of the piston is sealed-off on both sides of the remaining machine chambers or spaces with sealing rings located around the eccentric shaft. Circulation of the lubricating oil and cooling oil that is under pressure being delimited as to this bearing and the cooling hollow chambers of the piston with such lubricating oil and cooling oil being kept away from the working chambers and also eliminating any oil inner seals otherwise required therewith.
Abstract:
A diesel engine has a first lubrication system, containing conventional engine oil, used to lubricate that section of the engine subjected to excessive wear--the valve train including the cam shaft, valve lifters, rocker arm, valve stems, etc., and a second lubricant system, utilizing diesel fuel, for lubricating the remaining section of the engine--the crankshaft and associated parts, pistons, connecting rods, etc. By being exposed to crankcase blowby exhaust gases, diesel fuel used to lubricate the crankshaft, etc. absorbs pollutants and contaminants contained therein and recirculates these contaminants through the fuel system to be burned and exhausted. By constantly being lubricated with fresh lubricant, wear on these specific parts is reduced. Frequent lubrication changes have been eliminated because the diesel fuel/lubricant is continuously changed and circulated through fuel system. Since the engine oil and the first lubrication system is not exposed to crankcase blowby exhausted gases, its useful life is prolonged, thus reducing the frequency of required oil changes.
Abstract:
A preoiler and lubricating fluid reservoir for use primarily with an internal combustion engine is disclosed. A hollow cylindrical reservoir is provided with an internal slidable piston which divides the cylinder into a compressed air retaining section and a lubricating fluid retaining section. A solenoid controlled valve assembly, which is controlled by the vehicle's oil pressure sensor unit, regulates the flow of lubricating fluid either out of the reservoir either during start up of the engine or in instances of low oil pressure, and into the reservoir during periods of normal engine operation. The valve is structured to insure that oil flow out of the reservoir during preoiling is unrestricted but that refilling of the reservoir is accomplished only after the engine's oil pressure has come up to normal operating level. The system also serves to provide emergency oiling of the engine should the oil pump fail or a loss of oil pressure be encountered.