Method and device for controlling a valve with several lift phases, and method for supplying a thermal engine with oxidant
AssigneeValeo Systemes de Controle Moteur
InventorsNicolas Gelez, Damien Fournigault, Jean-Guilhem Dalissier, Julien Hobraiche
Life of this patent
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Abstract
The invention relates to a method for controlling a valve (13) in a thermal engine (10), the valve having a closed position and an opened position, the method comprising at least one step of opening the valve, said step including at least one phase (I) for bringing the valve into an open position and a phase (II) for maintaining the valve in an intermediate position between the closed position and the opened position. The invention also relates to a device for implementing this method and to a method for supplying an engine with an oxidant.
Claims11
A method for controlling a valve of a combustion engine, the valve having a closed position and an open position, the method comprising:
- at least one step of opening the valve, wherein opening the valve comprises:
- at least one first phase of bringing the valve into the open position, and
- a second phase of holding the valve in an intermediate position between the closed position and the open position;
- and
- communicating information with an engine control unit, the information comprising a valve lift and crank angles, wherein the information is communicated in the form of frames of information, each frame comprising:
- a triplet specifying the valve lift, a crank angle at an end of a previous lift, and a crank angle corresponding to a start of a desired lift, or
- a pair of doublets, specifying a previous lift and the crank angle corresponding to the end of the previous lift, and a next lift and a crank angle corresponding to a start of the next lift.
A device for controlling a position of a valve between a closed position and an open position, comprising:
- a valve actuator operatively connected to a computerized actuator control unit, wherein the control unit is programmed to open the valve in at least one first phase of bringing the valve into the open position and a second phase of holding the valve in an intermediate position between the closed position and the open position;
- and
- a system for communicating information with an engine control unit, said information comprising a valve lift and crank angles, wherein the information is communicated in the form of frames of information, each frame comprising:
- a triplet specifying the valve lift, a crank angle at an end of a previous lift, and a crank angle corresponding to the start of a desired lift, or
- a pair of doublets, specifying a previous lift and the crank angle corresponding to the end of the previous lift, and a next lift and the crank angle corresponding to a start of the next lift.
A method of supplying a cylinder of a combustion engine with oxidant during an induction stroke by moving an inlet valve between a closed position and an open position, the method comprising:
- at least one first phase of bringing the inlet valve into the open position;
- a second phase of holding the inlet valve in an intermediate position between the closed position and the open position;
- and
- communicating information with an engine control unit, the information comprising a valve lift and crank angles, wherein the information is communicated in the form of frames of information, each frame comprising:
- a triplet specifying the valve lift, a crank angle at an end of a previous lift, and a crank angle corresponding to a start of a desired lift, or
- a pair of doublets, specifying a previous lift and the crank angle corresponding to the end of the previous lift, and a next lift and a crank angle corresponding to a start of the next lift.
Dependencies are inferred from the claim text.