INTERNAL COMBUSTION ENGINE Russian patent published in 2015 - IPC F02B67/04 F01M1/02 F16N13/20 

FIELD: engines and pumps.

SUBSTANCE: invention can be used in internal combustion engines. An internal combustion engine (1) includes a cylinder block (2), an oil case (5), a crankshaft (3), a gear (4) of the crankshaft, an intermediate gear installed on an intermediate axis parallel to the axis of the crankshaft and engaged with the gear (4) of the crankshaft, and a gear-type oil pump (7) with the internal engagement of the gears. The oil pump (7) has a housing of gears, which is fixed on the end face of the cylinder block (2), in which there installed with a possibility of free rotation is an external gear and a shaft eccentrically to it, the axis of which is parallel to the axis of the crankshaft (3), an internal gear and a drive gear engaged with the intermediate gear, which are rigidly attached to the shaft, a suction cavity and a delivery cavity located directly at the inlet of a delivery oil line passing in the cylinder block (2), and an oil intake pipe. The housing of the gears of the oil pump has an outer cylindrical surface coaxial to the external delivery gear. The end face of the cylinder block has a groove in which the housing of the gears of the oil pump is installed with its outer cylinder surface so that it is borne against its bottom, and the suction cavity and the delivery cavity are made at the bottom of the groove. In the housing of the gears there is a hole, in which an intermediate axle is installed, which has a coaxial free cylindrical shank, and on the end face of the cylinder block there is an additional groove, in which the intermediate axle is installed with its free cylindrical shank.

EFFECT: reduction of overall dimensions of the oil pump and simplification of the design of a system of oil passages.

6 cl, 14 dwg