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AssigneeNone recorded
InventorsMasahiko Asano, Takashi Izuo, Kiyoharu Nakamura, Takeshi Sakuragi
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A control apparatus of an electromagnetic valve which includes a valve element, an armature connected to an armature shaft which is engaged with the valve element, a pair of spring means for energizing the valve element toward the valve-opening side and the valve-closing side, respectively, and an electromagnet for energizing the armature toward the valve-closing side of the valve element, and which operates the valve element to open and close by cooperative operation of an electromagnetic force of the electromagnet and an energizing force of the spring means, is provided with a controller which increases the energizing force of the spring means for energizing the valve element toward the valve-closing side immediately before seating of the valve element. By this type of the control apparatus of the electromagnetic valve, an increase in power consumption of the electromagnetic valve is suppressed.
A control apparatus of an electromagnetic valve which includes a valve element, an armature connected to an armature shaft which is engaged with the valve element, a pair of spring means for energizing the valve element toward a valve-opening side and a valve-closing side, respectively, and an electromagnet for energizing the armature toward the valve-closing side of the valve element, and operates the valve element to open and close by cooperative operation of an electromagnetic force of the electromagnet and an energizing force of the spring means, comprising:
A control apparatus of an electromagnetic valve which includes a valve element, an armature connected to an armature shaft which is engaged with the valve element, a pair of spring means for energizing the valve element toward a valve-opening side and a valve-closing side, respectively, and an electromagnet for energizing the armature toward the valve-closing side of the valve element, and operates the valve element to open and close by cooperative operation of an electromagnetic force of the electromagnet and an energizing force of the spring means, comprising:
A control apparatus of an electromagnetic valve which includes a valve element, an armature connected to an armature shaft which is engaged with the valve element, a valve-opening pneumatic spring for energizing the valve element toward a valve-opening side, a valve-closing pneumatic spring for energizing the valve element toward a valve-closing side, and a pair of electromagnets for energizing the armature in both axial directions of the armature shaft, respectively, and operates the valve element to open and close by cooperative operation of an electromagnetic force of each electromagnet and an energizing force of each pneumatic spring, comprising:
A control method of a control apparatus of an electromagnetic valve which includes a valve element, an armature connected to an armature shaft which is engaged with the valve element, a pair of spring means for energizing the valve element toward a valve-opening side and a valve-closing side, respectively, and an electromagnet for energizing the armature toward the valve-closing side of the valve element, and operates the valve element to open and close by cooperative operation of an electromagnetic force of the electromagnet and an energizing force of the spring means, comprising the following steps of:
A control method of a control apparatus of an electromagnetic valve which includes a valve element, an armature connected to an armature shaft which is engaged with the valve element, a pair of spring means for energizing the valve element toward a valve-opening side and a valve-closing side, respectively, and an electromagnet for energizing the armature toward the valve-closing side of the valve element, and operates the valve element to open and close by cooperative operation of an electromagnetic force of the electromagnet and an energizing force of the spring means, comprising the following steps of:
A control method of a control apparatus of an electromagnetic valve which includes a valve element, an armature connected to an armature shaft which is engaged with the valve element, a valve-opening pneumatic spring for energizing the valve element toward a valve-opening side, a valve-closing pneumatic spring for energizing the valve element toward a valve-closing side, and a pair of electromagnets for energizing the armature in both axial directions of the armature shaft, respectively, and operates the valve element to open and close by cooperative operation of an electromagnetic force of each electromagnet and an energizing force of each pneumatic spring, comprising the following steps of:
Dependencies are inferred from the claim text.
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Term end not estimated
The disclosure of Japanese Patent Application No. 2002-118806 filed on Apr. 22, 2002, including the specification, drawings and abstract is incorporated herein by reference in its entirety.
1. Field of the Invention
The invention relates to a control apparatus of an electromagnetic valve for operating a valve element to open and close by an electromagnetic force of an electromagnet and an energizing force of a spring, and a control method of the same.
The above mentioned embodiment and other embodiments, objects, features, advantages, technical and industrial significances of this invention will be better understood by reading the following detailed description of the exemplary embodiments of the invention, when considered in connection with the accompanying drawings, in which:
FIG. 1 is a drawing of a first exemplary embodiment of a control apparatus of an electromagnetic valve according to the invention;
FIGS. 2a, 2b, and 2c are cross-sectional views which schematically show operation modes of an air spring according to the exemplary embodiment;
In the following description and the accompanying drawings, the invention will be described in more detail in terms of exemplary embodiments.
(First Exemplary Embodiment)
A control apparatus of an electromagnetic valve according to a first exemplary embodiment will be described at first. Each of an intake valve and exhaust valve of an internal combustion engine is configured as an electromagnetic valve which is opened and closed by cooperative operation of an electromagnetic force of an electromagnet and an elastic force (energizing force) of a pair of air springs. More specifically, the electromagnetic valve is equipped with a pair of electromagnets for energizing an armature connected to an armature shaft in both armature axial directions. Furthermore, the electromagnetic valve includes a valve-opening air spring for energizing a piston connected to the armature shaft toward the valve-opening side of a valve element by a pressure in a pressure chamber, and a valve-closing air spring for energizing a piston connected to a valve shaft which is an axis of the valve element toward the valve-closing side of the valve element by a pressure in a pressure chamber. The valve element is operated to open and close by cooperative operation of the electromagnetic force which acts on the armature by the pair of electromagnets and the energizing force of the pair of air springs. Since the intake valve and the exhaust valve have the same basic structure, the intake valve is taken as an example herein to describe its internal structure.