The present disclosure is directed towards an engine assembly comprising a crankcase, a crankshaft, a lubrication system and fluid guide arrangement. During rotation the crankshaft is configured to drive a crankcase fluid flow in a crankcase chamber. The lubrication system comprises a lubricant drain for a drain fluid flow therethrough extending to a drain aperture at the crankcase chamber. The fluid guide arrangement is located adjacent or in proximity to the drain aperture. The fluid guide arrangement is configured for guiding crankcase fluid flow away from the drain aperture and/or for reducing the pressure of the crankcase fluid flow past the drain aperture, such that drain fluid flows from the lubricant drain.

The present disclosure is directed towards an engine assembly comprising a crankcase, a crankshaft, a lubrication system and fluid guide arrangement. During rotation the crankshaft is configured to drive a crankcase fluid flow in a crankcase chamber. The lubrication system comprises a lubricant drain for a drain fluid flow therethrough extending to a drain aperture at the crankcase chamber. The fluid guide arrangement is located adjacent or in proximity to the drain aperture. The fluid guide arrangement is configured for guiding crankcase fluid flow away from the drain aperture and/or for reducing the pressure of the crankcase fluid flow past the drain aperture, such that drain fluid flows from the lubricant drain.

A system comprises a follower lever and a follower roller rotatably coupled to the follower lever. A pin is rotatably coupled to the follower roller, the pin comprising a first outer portion including a first diameter and a second outer portion including a second diameter. A central portion is positioned between the first outer portion and the second outer portion, the central portion including a third diameter, the third diameter being smaller than the first diameter and the second diameter. One or more first channels is defined by the first outer portion, the one or more first channels positioned within the first outer portion and configured to direct fluid away from the central portion as the pin rotates.

A controller for a vehicle that includes an internal combustion includes processing circuitry. The processing circuitry obtains a predicted temperature outside the vehicle and estimates the viscosity of a lubricating oil based on the oil pressure and the oil temperature of the lubricating oil when the internal combustion engine satisfies a specific operation condition. When the processing circuitry determines that there is a likelihood of a cranking failure occurring in the internal combustion engine on condition that the predicted temperature is less than a threshold value that is based on the viscosity, the processing circuitry outputs a notification signal indicating that that there is a likelihood of a cranking failure occurring in the internal combustion engine.

A controller for a vehicle that includes an internal combustion includes processing circuitry. The processing circuitry obtains a predicted temperature outside the vehicle and estimates the viscosity of a lubricating oil based on the oil pressure and the oil temperature of the lubricating oil when the internal combustion engine satisfies a specific operation condition. When the processing circuitry determines that there is a likelihood of a cranking failure occurring in the internal combustion engine on condition that the predicted temperature is less than a threshold value that is based on the viscosity, the processing circuitry outputs a notification signal indicating that that there is a likelihood of a cranking failure occurring in the internal combustion engine.

A camshaft cover, a camshaft assembly, and a double-cylinder engine are provided. The camshaft cover has an integral structure, and includes a first shaft cover portion, a second shaft cover portion, a first connecting portion and a second connecting portion. The first connecting portion and the second connecting portion are connected between the first shaft cover portion and the second shaft cover portion, and spaced apart axially.

A camshaft cover, a camshaft assembly, and a double-cylinder engine are provided. The camshaft cover has an integral structure, and includes a first shaft cover portion, a second shaft cover portion, a first connecting portion and a second connecting portion. The first connecting portion and the second connecting portion are connected between the first shaft cover portion and the second shaft cover portion, and spaced apart axially.

In an exemplary embodiment, a sealing member 11 is provided between a rotating body 5 rotating while whirling within an accommodating chamber 4 partitioned by a housing and a side wall 3 of the accommodating chamber 4 and has a sliding surface S sliding on the side wall 3, and the sliding surface S includes a first lubrication mechanism 21 arranged on one side in the longitudinal direction, and a second lubrication mechanism 22 arranged on the other side in the longitudinal direction and exhibiting lubrication performance in a sliding direction different from that of the first lubrication mechanism 21, thereby improving sealing performance of the sealing member.

In an exemplary embodiment, a sealing member 11 is provided between a rotating body 5 rotating while whirling within an accommodating chamber 4 partitioned by a housing and a side wall 3 of the accommodating chamber 4 and has a sliding surface S sliding on the side wall 3, and the sliding surface S includes a first lubrication mechanism 21 arranged on one side in the longitudinal direction, and a second lubrication mechanism 22 arranged on the other side in the longitudinal direction and exhibiting lubrication performance in a sliding direction different from that of the first lubrication mechanism 21, thereby improving sealing performance of the sealing member.

A crankshaft assembly for a vehicle, a method of operating a crankshaft assembly, and a method of manufacturing a crankshaft assembly. The crankshaft assembly includes a crankshaft, a first pin bearing journal and a main journal, an oil passage having a main passage wall, the oil passage extending from the first pin bearing journal to or through the main bearing journal, a crankpin exit hole located in the main passage wall, and a blocking element positioned in the oil passage, wherein the blocking element is located in a radially outward position with respect to the crankpin exit hole.