An engine trigger wheel is disclosed having a central annular portion and a cylindrical rim portion defining a number of trigger teeth, wherein the central annular and cylindrical rim portions are pressed from a single piece of metal. A number of balance apertures are formed in the central annular portion to move a center of mass of the trigger wheel away from an axis of rotation. The engine trigger wheel when fastened to one end of a crankshaft of an engine provides both an indication of the angular position of the crankshaft and a counterweight function.

An apparatus and method of controlling an electronic continuously variable valve timing (CVVT) is provided. The apparatus includes a sensor disposed in a motor facing a reducer and an intelligent motor controller. The sensor determines a rotation speed of a first and second projection of a first and second rotation member and generates a sensing signal that corresponds to an output waveform of each rotation speed and inputs the signal to an intelligent motor controller coupled to the motor. The intelligent motor controller receives the signal and separates a crank shaft and cam shaft position signal. The signals are compared to detect an actual phase angle of the suction or exhaust valve. A phase deviation between the detected, actual and predetermined target phase angle is calculated.

Embodiments of the present disclosure relate to methods, system, and devices for synchronizing angular position information between a first and a second semiconductor chip used for engine management in an automobile is described. In accordance with one embodiment, a system for synchronizing angular position information between a first and a second semiconductor chip comprises the first and the second semiconductor chip and a digital real-time communication link connecting the first and the second semiconductor chip. The second semiconductor chip comprise a master angle estimation circuit, which is configured to estimate an angular position of the engine based on at least one angular position sensor signal. The first semiconductor chip comprises a slave angle estimation circuit, which is configured to estimate an angular position of the engine based on information concerning angular position received form the master angle estimation circuit via the communication link.

A method for controlling a high-pressure pump for the injection of fuel into a combustion engine, the high-pressure pump being connected to a camshaft of the combustion engine, wherein the high-pressure pump is controlled in a camshaft-synchronous manner by ascertaining an angular offset between the flank positions of a camshaft pulse-generating wheel and a predefinable point above the bottom dead center of a cam of the high-pressure pump on the camshaft.

An apparatus for assembling an engine includes an engine jig configured to load the engine on which a pump sprocket, a cam sprocket, an auto tensioner, and an engine belt are preliminarily mounted. The apparatus includes: a pump sprocket fastening unit disposed on a first die disposed on a first side of the engine jig and configured to clamp and fully fasten the pump sprocket in order to fixedly mount the pump sprocket preliminarily mounted to the engine; a cam sprocket fastening unit disposed on the first die and configured to clamp, rotate, and fully fasten the cam sprocket in order to fixedly mount the cam sprocket preliminarily mounted to the engine; and an auto tensioner fastening unit disposed on the first die, and configured to clamp, rotate, and fully fasten the auto tensioner in order to fixedly mount the auto tensioner preliminarily mounted to the engine.

A communicating hole, which communicates between a clearance space and the outside of a cover member, is formed in the cover member, and a seal cap is fitted to and retained in a distal-end opening of the communicating hole. The seal cap includes a cap main body having a ventilation through hole formed in an internal axial direction and an outer peripheral wall configured to engage with the communicating hole, a supporting portion fitted, from the outside, into a recessed groove formed in an outside end face of the cap main body, and a ventilation filter located on a bottom face of the recessed groove and retained and sandwiched between the cap main body and the supporting portion. Therefore, an internal pressure rise in the clearance space between the cover member and an electric motor can be effectively suppressed, and thus improved mountability and retainability can be obtained.

An apparatus for intake and exhaust of an engine includes: an outer tube including an outer-tube close end, an outer-tube open end, and a first outer-tube aperture set including a first aperture and a first outer-tube aperture group, an inner tube positioned in the outer tube about a concentric line, including an inner-tube close end, an inner-tube open end, and a first inner-tube aperture set including a second aperture and a first inner-tube aperture group, in which the inner-tube close end is proximate to the outer-tube close end, and a shaft connected to the inner-tube open end for rotating the inner tube in the outer tube about the concentric line, in which when the inner tube rotates, the second aperture sweeps across a portion of the first aperture and the first inner-tube aperture group sweeps across a portion of the first outer-tube aperture group.

A method for cleaning a continuously variable valve timing (CVVT) system for removing foreign materials includes: switching a target operating value of the CVVT system to a predetermined setting value within a set operating region and performing cleaning of the CVVT system; and determining whether a valve timing control learning request exists for the CVVT system, and, when the valve timing control learning request exists, aborting the cleaning.

Systems and methods for operating an engine with deactivating and non-deactivating valves are presented. In one example, engine volumetric efficiency actuators are adjusted in response to a request to activate engine cylinders so that engine intake manifold pressure is drawn down quickly toward its normal state at the engine's present speed and torque.

An internal combustion engine includes: a crankcase that supports a crankshaft rotatably about a rotational axis; a cylinder block connected with the crankcase and including at least one pair of cylinders that sandwich a valve chamber therebetween in an axial direction of the crankshaft, the valve chamber housing therein a valve actuating mechanism that connects a camshaft to the crankshaft; a detected member disposed between crank pins corresponding to the pair of cylinders, the detected member rotating integrally with the crankshaft; and a detection sensor disposed to face a trajectory of the detected member and generating a pulse signal in accordance with movement of the detected member. Accordingly, the internal combustion engine can avoid displacement of a nearby part and enlargement of the crankcase as much as possible, while allowing the detected member to be increased in size.