An electronic valve train assembly for performing intake and exhaust duties of an internal combustion engine includes a housing that is mounted to a head of an internal combustion engine. A plurality of valves is each movably integrated into the housing and extends into a combustion chamber of the internal combustion engine. A plurality of magnets is each attached to a respective one of the valves. A plurality of first electromagnets is each positioned within the housing to magnetically attract a respective one of the magnets when the first electromagnets are turned on thereby urging the valves into a closed condition. A plurality of second electromagnets is each positioned within the housing to magnetically attract a respective one of the magnets when the second electromagnets are turned on thereby urging the valves into an open condition.

A translating actuator acting between two extreme positions defined by mechanical stops is described. Said actuator comprises: an armature mass movable relative to the armature body, a stiff armature spring set such that the natural resting position of the armature mass is close to the centre of travel between the two extreme positions and pair of latches with sufficient holding force that the armature mass can be held at either extreme position against the restoring force of the spring and can be released quickly relative to the natural period of vibration determined by the armature mass on the armature spring.

The present invention concerns a method for electrically controlling a valve actuator in a 2-stroke or 4-stroke engine, where the actuator comprises a first solenoid (A) with a plunger (5) and a second solenoid (B) with a plunger (15), wherein the engine has at least one cylinder (1) with at least one freely controllable engine valve comprising a valve disc (10) with associated valve stem (11) and a valve spring (4) and where air is introduced, or exhaust gases are evacuated from, a combustion chamber (3) past a lower part of the valve stem with the valve disc via at least one channel (2) in the cylinder, wherein the valve actuator is activatable to open the engine valve. The invention is characterized in that both the first and second solenoid are activated during opening of the engine valve.

The present invention concerns a method for electrically controlling a valve actuator in a 2-stroke or 4-stroke engine, where the actuator comprises a first solenoid (A) with a plunger (5) and a second solenoid (B) with a plunger (15), wherein the engine has at least one cylinder (1) with at least one freely controllable engine valve comprising a valve disc (10) with associated valve stem (11) and a valve spring (4) and where air is introduced, or exhaust gases are evacuated from, a combustion chamber (3) past a lower part the valve stem with the valve disc via at least one channel (2) in the cylinder, wherein the valve actuator is activatable to open the engine valve. The invention is characterized in that both the first and second solenoid are activated during opening of the engine valve.

Linear actuators are disclosed. The linear actuator comprises a thruster and a stator. The thruster includes a thruster winding, and the stator includes a stator winding. The stator is disposed about the thruster. The linear actuator also includes a sheath disposed about the stator and the thruster. The thruster is configured to translate within the sheath relative to the stator upon application of an electrical current to the stator winding, the thruster winding, or a combination thereof. The stator winding and the thruster winding each comprise a nonpermanent magnet.

Linear actuators are disclosed. The linear actuator comprises a thruster and a stator. The thruster includes a thruster winding, and the stator includes a stator winding. The stator is disposed about the thruster. The linear actuator also includes a sheath disposed about the stator and the thruster. The thruster is configured to translate within the sheath relative to the stator upon application of an electrical current to the stator winding, the thruster winding, or a combination thereof. The stator winding and the thruster winding each comprise a nonpermanent magnet.

A head assembly for an internal combustion engine includes an electromagnetic valve actuation system. The head has an intake or exhaust passage defined therein. A valve is disposed in the passage and is operable to selectively open and close the passage. The head has a cooling passage defined therein for passage of a cooling fluid. An electromagnetic actuator has a piston in mechanical communication with the valve and a coil in fluid communication with the cooling passage. The electromagnetic actuator is operable to move the valve between a closed and an open position.

A member includes a unitary body defining a first portion integrally joined with a second portion through one or more shear tabs

A simple attachment structure with a minimized piece-part count, allowing easy grounding connection of the solenoid valve. The solenoid valve includes a body section with a built-in electromagnetic coil and a shaft-shaped valve section continued coaxially to the body section. An insertion hole for inserting the valve section in the control body is formed to the control body. The control body includes a locking mechanism composed of a locking piece with elasticity connected to a ground terminal of the electromagnetic coil and projecting out from an outer periphery of the body section and a concave portion provided on an upper surface of the control body. By inserting the valve section into the insertion hole, the locking piece elastically engages with the engaged part to lock the solenoid valve, and the solenoid valve is grounded through a contact between the locking piece and the engaged portion.

Provided is a simple attachment structure with a minimized piece-part count, allowing easy earth connection of the solenoid valve. The solenoid valve includes a body section with a built-in electromagnetic coil and a shaft-shaped valve section continued coaxially to the body section. An insertion hole for inserting the valve section in the control body is formed to the control body. The control body includes a locking mechanism composed of a locking piece with elasticity connected to a ground terminal of the electromagnetic coil and projecting out from an outer periphery of the body section and a concave portion provided on an upper surface of the control body. By inserting the valve section into the insertion hole, the locking piece elastically engages with the engaged part to lock the solenoid valve, and the solenoid valve is grounded through a contact between the locking piece and the engaged portion.