An improved crankshaft for an internal combustion engine with a self-pumping feature for oil to lubricate the rod bearing journals. Leading faces of the lobes carrying the rod bearing journals contain funnel ports to gather oil as the crankshaft rotates about its axis of rotation. The funnel ports are fluidly connected to an internal passageway within the crankpin. Outlet ports oriented radially inwards and outwards from the internal passageway allow the oil to flow into the space between the crankpin and the rod bearing. In this way, as the crankshaft rotates within the crank housing, oil captured by the funnel ports flows through the internal passageway and through the outlet ports so as to lubricate the rod bearing around the crankpin.

An improved crankshaft for an internal combustion engine with a self-pumping feature for oil to lubricate the rod bearing journals. Leading faces of the lobes carrying the rod bearing journals contain funnel ports to gather oil as the crankshaft rotates about its axis of rotation. The funnel ports are fluidly connected to an internal passageway within the crankpin. Outlet ports oriented radially inwards and outwards from the internal passageway allow the oil to flow into the space between the crankpin and the rod bearing. In this way, as the crankshaft rotates within the crank housing, oil captured by the funnel ports flows through the internal passageway and through the outlet ports so as to lubricate the rod bearing around the crankpin.

An improved crankshaft for an internal combustion engine with a self-pumping feature for oil to lubricate the rod bearing journals. Leading faces of the lobes carrying the rod bearing journals contain funnel ports to gather oil as the crankshaft rotates about its axis of rotation. The funnel ports are fluidly connected to an internal passageway within the crankpin. Outlet ports oriented radially inwards and outwards from the internal passageway allow the oil to flow into the space between the crankpin and the rod bearing. In this way, as the crankshaft rotates within the crank housing, oil captured by the funnel ports flows through the internal passageway and through the outlet ports so as to lubricate the rod bearing around the crankpin.

An improved crankshaft for an internal combustion engine with a self-pumping feature for oil to lubricate the rod bearing journals. Leading faces of the lobes carrying the rod bearing journals contain funnel ports to gather oil as the crankshaft rotates about its axis of rotation. The funnel ports are fluidly connected to an internal passageway within the crankpin. Outlet ports oriented radially inwards and outwards from the internal passageway allow the oil to flow into the space between the crankpin and the rod bearing. In this way, as the crankshaft rotates within the crank housing, oil captured by the funnel ports flows through the internal passageway and through the outlet ports so as to lubricate the rod bearing around the crankpin.

Embodiments are directed toward an engine. In some embodiments, the engine includes a water pump and a balancer shaft. In some embodiments, the water pump has a plain bearing. In some embodiments, plain bearing is supplied with pressurized oil. In some embodiments, the balancer shaft drives the water pump as well as cam shafts.

Embodiments are directed toward an engine. In some embodiments, the engine includes a water pump and a balancer shaft. In some embodiments, the water pump has a plain bearing. In some embodiments, plain bearing is supplied with pressurized oil. In some embodiments, the balancer shaft drives the water pump as well as cam shafts.

A crankshaft, an inverter compressor and a refrigeration device are provided. The crankshaft has a main shaft, a crank, and a crank shaft at an end of the main shaft through the crank. The main shaft has an oil suction inner chamber, and an oil distribution channel penetrating the crank shaft. An outer wall surface of the main shaft has a first spiral oil groove and a second spiral oil groove. One end of each of the first spiral oil groove and a second spiral oil groove is in communication with the oil suction inner chamber. Another end of the first spiral oil groove and another end of the second spiral oil groove are formed as a first hole channel and a second hole channel in communication with the oil distribution channel, respectively.

A crankshaft, an inverter compressor and a refrigeration device are provided. The crankshaft has a main shaft, a crank, and a crank shaft at an end of the main shaft through the crank. The main shaft has an oil suction inner chamber, and an oil distribution channel penetrating the crank shaft. An outer wall surface of the main shaft has a first spiral oil groove and a second spiral oil groove. One end of each of the first spiral oil groove and a second spiral oil groove is in communication with the oil suction inner chamber. Another end of the first spiral oil groove and another end of the second spiral oil groove are formed as a first hole channel and a second hole channel in communication with the oil distribution channel, respectively.

An improved internal combustion engine utilizes at least one orbital body with at least one orbiting rod journal offset and engaged in a specific way from the center of orbiting body. Further, orbiting body together with orbiting rod journal and one of the gears as one body, rotationally linked to the block via stationary second gear engaged in 1:1 ratio. Which transfers the rotation to main journal via flying arm. Such that radial motion of flying arm transfers the rotation to the main crankshaft axis and constitute one body. This results in a constant volume compression period of max. 60° , improving operation, efficiency and cleanliness of the engine.

The bearing apparatus 1 includes a crankshaft having multiple journals, main bearings supporting the crankshaft, and a bearing housing. The plurality of journals include a first journal with a lubricating oil passage and a second journal without a lubricating oil passage. The first and second journals are supported by first and second main bearings, respectively. The bearing housing is constituted by an Al-alloy upper housing and an Fe-alloy lower housing. The depth of the oil groove of the upper half bearing of the second main bearing at least in a ±45° region is equal to or smaller than a half of the depth of the oil groove of the upper half bearing of the first main bearing in the ±45° region.