An efficient internal combustion engine including a housing such as a cylinder block, cylinder covers and one or more pairs of working piston and auxiliary piston, moving in the working cylinder and auxiliary cylinder respectively. For each pair of working piston and auxiliary piston, the engine also has rods operatively connected to working piston and auxiliary piston, intake valve, operatively connected to the intake channel in the cylinder block, exhaust valve, operatively connected to the exhaust channel in the cylinder block, and two bypass valves located between the working cylinder and auxiliary cylinder. The engine also has a crankshaft that also functions as a camshaft, rod pushers for pushing special nozzles and valves, flywheel, Hydro-compensators and preferably a high pressure fuel pump (HPFP). No cylinder heads or separate camshafts are used in the present invention.tle

Improved internal combustion engine with a high-pressure fuel pump

A single-row planetary bearing includes a single row of spherical rolling elements between an outer ring and an inner ring. A planetary gear is supported by a thrust bearing portion and is radially supported by the outer ring. The planetary gear performs a planetary motion while engaging with a driving rotor and a driven rotor at an eccentric side to adjust a rotational phase between the driving rotor and the driven rotor. The thrust bearing portion supports the planetary gear that is tilting with respect to the revolution centerline. The planetary gear has a recessed portion opened toward the thrust bearing portion. When the rotational phase is adjusted to a specific phase, the recessed portion is positioned at an anti-eccentric side opposite to the eccentric side with respect to a rotation centerline of the planetary gear.

An efficient internal combustion engine including a housing such as a cylinder block, cylinder covers and one or more pairs of working piston and auxiliary piston, moving in the working cylinder and auxiliary cylinder respectively. For each pair of working piston and auxiliary piston, the engine also has rods operatively connected to working piston and auxiliary piston, intake valve, operatively connected to the intake channel in the cylinder block, exhaust valve, operatively connected to the exhaust channel in the cylinder block, and two bypass valves located between the working cylinder and auxiliary cylinder. The engine also has a crankshaft that also functions as a camshaft, rod pushers for pushing special nozzles and valves, flywheel, Hydro-compensators and preferably a high pressure fuel pump (HPFP). No cylinder heads or separate camshafts are used in the present invention.

An efficient internal combustion engine including a housing such as a cylinder block, cylinder covers and one or more pairs of working piston and auxiliary piston, moving in the working cylinder and auxiliary cylinder respectively. For each pair of working piston and auxiliary piston, the engine also has rods operatively connected to working piston and auxiliary piston, intake valve, operatively connected to the intake channel in the cylinder block, exhaust valve, operatively connected to the exhaust channel in the cylinder block, and two bypass valves located between the working cylinder and auxiliary cylinder. The engine also has a crankshaft that also functions as a camshaft, rod pushers for pushing special nozzles and valves, flywheel, Hydro-compensators and preferably a high pressure fuel pump (HPFP). No cylinder heads or separate camshafts are used in the present invention.

An engine generator has an opening and closing mechanism including: a control shaft provided to a valve shaft of a choke valve to be rotatable relative thereto within a predetermined angular range; an urging member urging the valve shaft relative to the control shaft in a direction in which an opening degree of the choke valve decreases; a restriction mechanism that sets a minimum opening degree of the choke valve by restricting a range of rotation of the control shaft; a choke operating portion which, upon operation, drives the restriction mechanism in a direction in which the minimum opening degree of the choke valve decreases; and a negative pressure mechanism driven by a negative pressure generated during an operation of the engine to cause the control shaft to rotate to increase the minimum opening degree of the choke valve within the range of rotation restricted by the restriction mechanism.

An engine generator has an opening and closing mechanism including: a control shaft provided to a valve shaft of a choke valve to be rotatable relative thereto within a predetermined angular range; an urging member urging the valve shaft relative to the control shaft in a direction in which an opening degree of the choke valve decreases; a restriction mechanism that sets a minimum opening degree of the choke valve by restricting a range of rotation of the control shaft; a choke operating portion which, upon operation, drives the restriction mechanism in a direction in which the minimum opening degree of the choke valve decreases; and a negative pressure mechanism driven by a negative pressure generated during an operation of the engine to cause the control shaft to rotate to increase the minimum opening degree of the choke valve within the range of rotation restricted by the restriction mechanism.

An improved length adjustable pushrod device for disposition in an internal combustion engine between a rocker arm and a cam shaft comprises a base rod section having a hollow interior extending between an inward seat within the hollow interior and an outward opening at one end of the base rod section and an extension rod section having one end thereof insertable telescopically through the outward opening at the one end of the base rod section and into the hollow interior thereof. The base and extension rod sections define a collective length of the pushrod device when assembled. At least one shim is provided for selective disposition in the hollow interior of the base rod section between the seat thereof and the one end of the extension rod section for selectively varying the collective assembled length of the base and extension rod sections.

A valve timing control apparatus of an internal combustion engine may include a driving rotational body to which torque is transmitted from a crankshaft, a driven rotational body fixed to a camshaft to which torque is transmitted from the driving rotational body, an electric motor disposed between the driving rotational body and the driven rotational body and relatively rotating the driving rotational body and the driven rotational body when electric power is applied thereto, and a deceleration mechanism that decelerates a rotational speed of the electric motor and transmits the decelerated rotational speed to the driven rotational body.

A valve timing control apparatus of an internal combustion engine may include a driving rotational body to which torque is transmitted from a crankshaft, a driven rotational body fixed to a camshaft to which torque is transmitted from the driving rotational body, an electric motor disposed between the driving rotational body and the driven rotational body and relatively rotating the driving rotational body and the driven rotational body when electric power is applied thereto, and a deceleration mechanism that decelerates a rotational speed of the electric motor and transmits the decelerated rotational speed to the driven rotational body.

In a cylinder lubrication system for a two-stroke engine, a plurality of lubricating oil supply openings (78) open out in the inner circumferential surface of the cylinder (42) at a point lower than a top ring (22b) of a piston (22) located at a bottom dead center. The lubricating oil supply openings are configured to provide a larger amount of lubricating oil in the thrust side and anti-thrust side of the cylinder than in a remaining part of the cylinder. Thereby, the consumption of lubricating oil and the emission of undesired substances can be minimized while providing an optimum lubrication of the sliding part between the piston and the cylinder.