Method and device for opening and closing a valve of an internal combustion engine
AssigneeMahle Ventiltrieb GmbH
InventorsMarcus Abele, Thomas Glas, Martin Lechner, Christoph Steinmetz
Life of this patent
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Abstract
The invention relates to a method and to a device for opening and closing a valve of an internal combustion engine. The aim of the invention is to reduce the energy required for opening and closing a valve of an internal combustion engine, especially one that is provided with an electromagnetic valve control. To this end, the kinetic energy of the valve is transferred to a mass and temporarily stored in a mass.
Claims12
A method for opening and closing a valve of an internal combustion engine, the engine having a first mass coupled to a valve, a second mass, said second mass being movably arranged, a stop disposed between the first mass and the second movably arranged mass, the method comprising the steps of:
- a) transferring kinetic energy of the valve during a closing movement of the valve via a mechanical pulse, from the first mass to the second movably arranged mass;
- b) storing in the second movably arranged mass said kinetic energy as potential energy;
- c) transferring said potential energy in the second movably arranged mass back into kinetic energy which is then translated into the first mass and onto the valve;
- d) moving said valve into an open position via the kinetic energy;
- e) resting the second movably arranged mass against a stop, when the valve is in motion during said step of resting and wherein an electromagnet retains the valve in an open position.
A device for actuating a valve of an internal combustion engine comprising:
- a) a plurality of movably arranged masses comprising at least one first mass and at least one second mass wherein said plurality of movably arranged masses are movable against a resetting force wherein said at least one first mass is coupled to the valve and has a contact surface for an energy transfer between said at least one second mass and said at least one first mass by a mechanical pulse;
- b) a stop disposed adjacent to said at least one of said plurality of movably arranged masses wherein said stop stops a movement of said plurality of movably arranged masses;
- and
- c) an electromagnet arranged adjacent to said plurality of movably arranged masses, wherein said electromagnet acts on said at least one first mass to retain the valve in an open position.
A device for actuating a valve of an internal combustion engine comprising:
- a) at least one first mass coupled to the valve;
- b) at least one second mass;
- c) at least one stop disposed between said at least one first mass and said at least one second mass;
- d) at least one first electromagnet disposed adjacent to said at least one first mass;
- e) at least one second electromagnet disposed adjacent to said at least one second mass;
- f) at least one first spring coupled at one end to said at least one first mass;
- g) at least one second spring coupled at one end to said at least one second mass;
- h) at least one first support coupled to an end of said at least one first spring opposite said at least one first mass;
- i) at least one second support coupled to an end of said at least one second spring opposite said at least one second mass;
- and
- j) at least one intermediate member coupled to said at least one second mass;
- wherein to open the valve, a current is supplied to said at least one second electromagnet causing said at least one second mass to move against said at least one second spring and away from said at least one first mass and then held in a retaining position, wherein said at least one second electromagnet releases said at least one second mass causing said at least one second mass to move towards said at least one first mass via said at least one second spring wherein said at least one intermediate member contacts said at least one first mass driving said at least one first mass against said at least one first spring and forcing the valve open.
Dependencies are inferred from the claim text.