An engine assembly includes an air-cooled engine and an external oil reservoir. The engine includes a vertically-oriented crankshaft a crankcase cover having a front portion and a rear portion, wherein the front portion of the crankcase cover and the cylinder head are located forward of a vertical plane that includes the crankshaft axis, a return pump housing formed in the exterior of the crankcase cover, a return pump positioned in the return pump housing, and a return pump inlet formed through the crankcase cover, wherein the return pump inlet is located in the front portion of the crankcase cover and the return pump inlet is located closer to the camshaft than to the crankshaft. The external oil reservoir includes an oil tank and an oil filter assembly.

In an oil filter attaching structure for a vehicle-mounted internal combustion engine, an oil filter of the engine is installed in a filter case integrally formed with a crankcase cover of a crankcase. The crankcase cover is mounted on a side surface of the crankcase so as to cover an end of a crankshaft supported by the crankcase to extend in vehicle widthwise directions. An internal combustion engine accessory and a transmission clutch device are disposed inside of the crankcase cover in respective positions forward and rearward of the crankshaft. The oil filter and an oil supply port are disposed inside of the crankcase cover in respective positions upward and downward of the crankshaft. The oil filter attaching structure efficiently utilizes the space for making itself smaller in size and for better maintainability.

An example oil system is provided, including at least one oil chamber forming an oil sump, an oil reservoir, which is arranged separately from the oil chamber, and at least partially arranged at the same geodetic height as the oil chamber, and at least one fluid connection which connects the oil chamber to the oil reservoir. An electric shut-off unit may block the fluid connection of the oil chamber to the oil reservoir in a blocking state and at least partially release the same in a release state. In order to extend oil changing intervals, a number of regeneration operations and an estimate of an instantaneous degree of dilution of oil present in the oil chamber, may be used for activating the electric shut-off unit to connect or block the fluidic connection between the oil chamber and the oil reservoir.

An engine assembly includes an engine, an external oil reservoir, a supply pump, and a return pump. The engine includes an oil gallery configured to distribute oil and a crankcase chamber. The external oil reservoir includes an oil tank defining an oil chamber and an oil filter assembly including a housing at least partially defining a filter chamber, and a filter positioned within the filter chamber. The supply pump is in fluid communication with the oil chamber and the oil gallery and the supply pump is configured to draw oil from the oil chamber and provide pressurized oil to the oil gallery. The return pump in fluid communication with the crankcase chamber and the filter chamber and the return pump is configured to draw oil from the crankcase chamber and provide pressurized oil to the filter chamber.

An object of the present invention is to simplify portions of an oil supply passage which portions are formed at a cylinder block. An oil supply device according to the present invention includes a cylinder block, an oil pan, an oil pump, and an oil filter. Wall portions of the oil pan are coupled to wall portions of the cylinder block. An oil filter is attached to the oil pan. An upstream oil supply passage through which the oil filtrated by the oil filter flows is formed at the oil pan. A downstream oil supply passage including a main gallery extending in a cylinder column direction is formed at the cylinder block. A first communication passage through which the main gallery and the upstream oil supply passage communicate with each other is formed at the wall portion of the cylinder block and the wall portion of the oil pan.

A fluid distribution assembly for distributing a fluid, the fluid distribution assembly includes an inlet housing including a first conduit and a bypass conduit; a chip detector cavity in fluid communication with the first conduit such that the fluid can pass through the first conduit into the chip detector cavity; and an outlet housing in fluid communication with the chip detector cavity and the bypass conduit such that the fluid can pass into the outlet housing through the chip detector cavity and/or the bypass conduit.

An oil collection system includes a boat that has an engine. A pan is removably coupled to the engine such that the pan may capture oil leaked from the engine. A plurality of clips is provided and each of the clips is coupled to the pan. Each of the clips engages the bottom end of the engine such that the pan is removably retained on the engine. A filter is positioned within the pan such that the filter filters the oil. A gauge is coupled to the pan such that the gauge may display an amount of oil contained within the pan. A drain is coupled to the pan such that the drain may selectively drain the oil from the pan.

An engine oil supply system may include an oil pan connected with an oil pump at a first side and connected with an oil cooler at a second side, an oil passage through which oil pressurized by the oil pump flows, an oil filter disposed in the oil pan to filter impurities in the oil supplied from the oil pump, and a bypass valve disposed in the oil passage to selectively supply the oil in the oil passage to at least one of the oil cooler and the oil filter.

A valve system is disclosed herein. The valve system, in one arrangement, may comprise: a fluid pathway for transporting a fluid; a first valve operably coupled to the fluid pathway, the first valve comprising a first resilient element; a second valve operably coupled to the fluid pathway, the second valve comprising a second resilient element that is substantially identical to the first resilient element; wherein, when the first valve is in a closed state, the first resilient element is compressed to a first length so that the first valve opens at a first pressure; and wherein, when the second salve is in a closed state, the second resilient element is compressed to a second length so that the second valve opens at a second pressure, the first length is less than the second length such that the second pressure is less than the first pressure.

An engine assembly includes an engine, an external oil reservoir, a supply pump, and a return pump. The engine includes an oil gallery configured to distribute oil and a crankcase chamber. The external oil reservoir includes an oil tank defining an oil chamber and an oil filter assembly including a housing at least partially defining a filter chamber, and a filter positioned within the filter chamber. The supply pump is in fluid communication with the oil chamber and the oil gallery and the supply pump is configured to draw oil from the oil chamber and provide pressurized oil to the oil gallery. The return pump in fluid communication with the crankcase chamber and the filter chamber and the return pump is configured to draw oil from the crankcase chamber and provide pressurized oil to the filter chamber.