62 results about "Dry sump" patented technology

A modular oil pump for use in combination with an internal combustion engine having a dry sump lubrication system. The device features a first gerotor pump having an intake port engageable in communication with at least one engine sump and having an discharge port engageable in sealed communication with a fluid reservoir for the dry sump system. A second gerotor pump, engageable in sealed communication with the fluid reservoir has a discharge port fluidly engageable with the engine lubrication system oil supply conduit. Both the first pump and second pump are assembled from separate housings, and cooperatively engaged inner and outer gears sized for rotation and in line mounting on the engine crankshaft inside a cavity in the housings. The volume pumping capacity of the first pump at a ratio to efficiently drain fluid and gas from the engine sumps and supply the reservoir with a constant supply of lubrication fluid. The device may be assembled from a kit having a plurality of different sized components to adjust the ratio of the pumping volume of the first pump to the second pump.

A tank assembly for a dry sump lubrication system for an internal combustion engine is disclosed. The tank assembly includes a tank having an upper tank portion and a lower tank portion. An interface assembly is disposed at the lower tank portion and is configured to operably deliver and receive a lubricant to and from the engine. A first end of a return tube in fluid communication with a second end is configured to receive lubricant from the engine at the interface assembly. The second end opposite the first end is in fluid communication with the upper tank portion. In this manner, a return hose and a feed hose may be connected to a same portion of the tank assembly.

The interior of a crankcase is divided into a front crank chamber and a rear transmission chamber by a partition wall of a given height. A lower part of the transmission case is used as an oil reservoir chamber for reserving lubricating oil. Opposite ends of the crankcase are covered with covers to form a generator chamber and a clutch chamber. The crank chamber is connected to the generator chamber by a drain passage to drain oil collected in the crank chamber into the generator chamber. A scavenging pump placed in the clutch chamber sucks the oil collected in the generator chamber through an oil passage extending across the crankcase under the crank chamber and discharges the oil into an air space in the clutch chamber.

Disclosed is a personal watercraft capable of efficiently placing a dry-sump engine room and of efficiently using a dead space in the engine room. The small dry-sump engine comprises: a plurality of cylinders; at least one cylinder head provided as corresponding to the cylinders; a crankcase chamber; an oil tank chamber independent of the crankcase chamber, the oil tank chamber being located lower than the cylinder head; and an oil return passage configured such that its upper end communicates with the cylinder heads and its lower end communicate with the oil tank chamber.

A dry sump oil tank assembly for a vehicle is provided with a housing defining an internal cavity. The housing is configured with a laterally-extending portion to add lateral volume to the internal cavity and has at least one internal baffle attached to the housing within the internal cavity below the laterally-extending portion and configured to reduce sloshing of oil within the cavity. The dry sump oil tank assembly is particularly useful for high performance applications, such as racing vehicles, and may utilize components from standard vehicle applications, thus maximizing the economies of scale of producing such components and being suited for a vehicle that may be typically used in standard driving conditions, but occasionally subjected to high performance use.

A dry sump lubrication system for a four cycle engine is disclosed. The dry sump lubrication system has at least two lubricant storage chambers. A first lubricant storage chamber stores a first volume of lubricant. The first lubricant storage chamber may be located in a lower part of the crankcase. A second lubricant storage chamber is an oil tank and stores a second volume of lubricant. The oil tank may be secured to the output end of the crankcase. The first lubricant storage chamber is capable of storing at least 30% of a total volume of lubricant within the dry sump lubrication system.

A lubrication system for a gear system for a wind turbine is disclosed. The lubrication system comprises a reservoir adapted to contain lubricant, first pump means arranged to supply lubricant from the reservoir to the gear system via a first fluid connection, and vacuum generating means arranged in fluid connection with the reservoir, thereby maintaining a total air pressure in the reservoir which is lower than an ambient pressure during normal operation. The lowered total air pressure in the reservoir draws lubricant from the gear system into the reservoir, thereby increasing the lubricant level in the reservoir and decreasing the lubricant level in the gear system, allowing the lubrication system to be operated in a ‘dry sump mode’. In the case of an emergency or during start-up the vacuum generating means is stopped, thereby increasing the total air pressure in the reservoir. This causes a decrease in the lubricant level in the reservoir and an increase in the lubricant level in the gear system, allowing the lubrication system to be operated in a ‘wet sump mode’.

A snowmobile four-cycle engine arrangement, includes: a four-cycle engine arranged in an engine compartment formed in the front body of a snowmobile with its crankshaft laid substantially parallel to the body width and having a cylinder case inclined forwards with respect to the vehicle's direction of travel. The engine employs a dry sump oil supplying system and an oil tank separate from the engine is provided. Another snowmobile four-cycle engine arrangement includes: a four-cycle engine having a cylinder head at its top, arranged in the engine compartment and inclined forwards with respect to the vehicle's direction of travel with an intake path provided on the upper portion of the engine body. An intercooler for cooling the intake air is arranged in a tunnel created inside the body frame for accommodating a track belt.

An engine is disclosed having an improved lubrication system and scavenging system. An oil sleeve is positioned between the cylinder and the crankcase, the sleeve having a bore sized to receive the piston. The piston and sleeve define an annular oil space which is connected to a reservoir by oil lines. A fixed seal is positioned surrounding the piston between the cylinder and the oil sleeve. A movable seal is mounted on and surrounds the piston. On the power stroke the movable seal moves away from the fixed seal, drawing oil from the reservoir into the annular oil space. On the compression stroke, the movable seal moves toward the fixed seal, forcing the oil from the annular oil space into the piston wrist pin and through conduits to the crank and main bearings and then back to the reservoir. Separate scavenging and charging tubes connect the crankcase to the cylinder.

A feed pump 28 that is driven by the axial torque of an internal combustion engine 10 is installed. An electric scavenge pump 36 is installed. A base value for the ratio (S/F ratio) between the discharge volume of the scavenge pump 36 and feed pump 28 is calculated. The base value is corrected so that the S/F ratio is lower in a region where the engine speed is high than in a region where the engine speed is low. The discharge volume of the scavenge pump 36 is controlled in accordance with the S/F ratio that is corrected in the above manner.

An oil tank for a dry sump engine has a housing having an upper region and a lower region in which the oil is contained. The lower region has an oil outlet to feed a pump which supplies oil to the engine. The upper region houses a swirl tube connected to an oil inlet for air to separate from the incoming oil. The upper region includes an air outlet and is provided with two dished baffle plates each shaped to form a collector area which slopes towards the swirl tube in order to reduce droplets of condensation formed in the upper region flowing into the lower region. The wall of the swirl tube is heated by the incoming oil to promote vaporisation of droplets of condensation collected in the collector area.

A dry sump type lubrication device for a motorcycle includes a four stroke engine having, in a crankcase bottom, a first oil pump for collecting lubricating oil and a second oil pump for delivering lubricating oil. A frame supporting the four-stroke engine and having left and right down tubes running around the crankcase from the crankcase front thereof toward a region therebelow is provided. An oil tank is disposed in a region surrounded by a forward end of the crankcase and the left and right down tubes, a return passage for the lubricating oil collected by the first oil pump to be returned to the oil tank. A feed passage for the lubricating oil returned to the oil tank to be introduced into the second oil pump and an overflow passage for the lubricating oil in the oil tank to be returned to the four-stroke engine are also provided.

The invention discloses an engine lubricating system and an engine. The engine lubricating system comprises two parts, namely oil suction part and oil return part; the oil suction part comprises a lubricating oil tank, an air cooling oil cooler and a main oil pump which are connected in sequence, the main oil pump sucks the lubricating oil in the lubricating oil tank into the air cooling oil cooler to be cooled under the driving of a crankshaft, and the cooled lubricating oil enters the main oil passage under the action of the main oil pump; the oil return part comprises two parts, the first part is as follow: the lubricating oil entering a piston cooling nozzle, a main bearing, a camshaft bearing and an accessory system flows back to a dry-type oil sump under the action of gravity, and the lubricating flowing back to the dry-type oil sump is pressed back to the lubricating oil tank under the action of the air pressure of a crankcase; and the second part is as follow: the lubricating oil entering a supercharger and a valve cover of the air valve is sucked back to the lubricating oil tank under the action of an oil return pump and through an external oil return pipe. According to the engine lubricating system and the engine, the oil can be directly taken out from the lubricating oil tank by a lubricating oil pump, the situation that the oil cannot be sucked is avoided, limitation on the flying angle of a aircraft is small, the aircraft can do more actions, and flight performance is improved.

The invention belongs to the field of diesel engine oil systems and particularly relates to a lubrication oil tank of a large-power box type diesel generating set. The lubrication oil tank comprises a lubrication oil tank body and a main engine oil pump. The lubrication oil tank is characterized in that the lubrication oil tank body is composed of a dry type oil bottom shell, a square corrugated pipe and a secondary oil tank, wherein the dry type oil bottom shell is composed of a shell body of the dry type oil bottom shell and an oil returning opening of the dry type oil bottom shell; one end of the square corrugated pipe is connected with the oil returning opening of the dry type oil bottom shell and the other end of the square corrugated pipe is connected with the secondary oil tank so that the secondary oil tank and the secondary oil tank are connected to form a whole body; an oil suction pipe of the main engine oil pump, an oil suction opening of the main engine oil pump and an oil returning opening of the main engine oil pump are arranged in the secondary oil tank; one part of the oil suction pipe of the main engine oil pump is arranged in the secondary oil tank and is connected with the oil suction opening of the main engine oil pump by the oil returning opening of the main engine oil pump; the other part of the oil suction pipe of the main engine oil pump penetrates out of the secondary oil tank to be arranged outsides to be connected with other devices of the generating set. The lubrication oil tank of the large-power box type diesel generating set is compact in structure, reasonable in arrangement and good in engine oil cycling performance; the oil storage volume is large; the box type diesel generating set is convenient to move, low in investment cost, low in noises and the like.