MXPA98006519A - Valve - Google Patents

Abstract

The present invention relates to a gas valve for configuring in the intake gate of an internal combustion engine, which comprises a discharge line that can be connected, on the one hand, to the intake gate, and which is connected , on the other hand, to a discharge opening into a valve chamber, there is the valve chamber provided with an intake opening of a supply line to be connected to the gas supply, a valve body closing the opening discharge, and which is configured in a displaceable manner in the valve chamber, and is connected to an actuating part, driven by the coil, which is present between the supply line and the discharge line, characterized in that the body of the valve is held with tolerance between two plates, determining this stroke tolerance of the valve body, and whose plates are kept apart by an interchangeable adjustment ring.

Description

QAS VALVE The present invention relates to a gas valve that is to be configured in the intake port of a combustion engine in accordance with the preamble of claim 1.

BACKGROUND OF THE INVENTION 10 International Publication Number WO 94/15092 describes the general deployment for a gas injector, for an internal combustion engine.

OBJECTIVES AND ADVANTAGES OF THE INVENTION 15 The introduction of a gaseous medium in an internal combustion engine requires an accurate measurement while, on the other hand, the valve used for this purpose needs to be as strong as possible. Attempts are being made to achieve fuel injection in sequence. On the one hand, this ensures an even more accurate measurement of the fuel towards each individual cylinder, and on the other hand, there is no longer a risk of fire returning, particularly during gas injection. The return fire occurs in particular if, during start-up, the intake damper is completely filled with a fuel mixture, an intake valve is open f 2, and during start-up, the spark plug associated with the intake valve in question sparkles. This can result in considerable damage to the intake manifold or air filter. By means of the S injection in sequence as close as possible to the intake valves, the amount of fuel that is present in the intake manifold can be considerably reduced, as a result of which, they are eliminated or limited to any degree the effects of fire of return. By introducing the fuel as close as possible to the intake valves, the combustion engine will react in a particularly rapid manner to the movements of the accelerator pedal. 15 However, the use of sequential injection requires a separate valve for each cylinder, whose valve can inject all the gas required for an operating cycle within the time that the intake valve in question is open. 20 Maximum measurement accuracy is achieved if the injection time required for each motor is equal to, or shorter than, the opening time of the intake valve. This means, on the one hand, that the accuracy of The introduction of each valve needs to be particularly high 3, while, on the other hand, the cost price has to be as low as possible, in order to make it possible to inject in sequence in an economically viable manner. As a result, it should be possible to adapt a valve of this kind in a simple manner to different combustion engines. * The objects described above are achieved with a gas valve as described above, which has The characterization features of claim 1. The invention is based on the perspective that the lifting of the valve, which up to a large degree is the parameter that defines the amount of gas flowing through it, can be done adjustable in a simple way, enclosing the valve body between two parallel plates that define the valve lift of the valve body. The distance between these two parallel plates is fixed by means of an adjusting ring. If you have to adapt the valve to a motor different combustion, the adjustment ring can simply be made thicker or thinner. The lift of the valve is of great importance, since the time to inject gas is relatively short, and the amount of gas that has to flow through it, it is relatively large.

In a typical example, the valve is in a position at least partially open for 25 percent of the time. A typical valve lift of the body of the > valve is 0.25 mm. In accordance with a convenient embodiment of the invention, the gas is injected by means of an annular conduit # through a series of radial intake openings configured in the circumference of the adjustment ring. The actuator portion is preferably of an electrical form, and comprises an actuator rod that is configured in a translational manner with respect to the valve housing, and at the remote end of the body of the valve, is provided with an actuator. ferromagnetic member which is configured to interact with a coil, and a return element that is configured on the actuator element. The problems that can possibly arise to guide the body of the valve / actuator rod with respect to the remaining parts of the housing can be resolved by configuring a diaphragm there. By providing the actuator rod with an additional diaphragm, these diaphragms can be used to provide guidance. This means that it is not necessary to provide a sliding contact bearing. This is particularly important to avoid the lubrication problems that occur when using vaporous LPG or gaseous LNG. The actuator coil described above can be designed from any known in the prior art, but preferably comprises a ferromagnetic core around which a coil is formed, which core comprises a free end face, the member comprising * actuator a cylindrical part provided with an end face designed to interact with the end face of the core. Preferably, the return element comprises a spring acting on the ferromagnetic member. This spring serves to take considerable loads. Accelerations of 3,000 to 4,000 meters / sec2 are not uncommon. It should be noted that the actuator rod described above also has cushioning and elastic properties.

BRIEF DESCRIPTION OF THE DRAWINGS The invention will be explained in more detail further on with reference to an example embodiment illustrated in the drawings, in which: Figure 1 shows a cross section of the valve according to the invention, in the position closed . Figure 2 shows the valve according to Figure 1, partially in cross section, in the open position.

DETAILED DESCRIPTION OF THE INVENTION 5 In the drawings, 1 indicates the gas valve according to the invention. It is intended that this be configured in the intake manifold of an internal combustion engine, and deliver a gas. This differs from the designs where liquefied fuel gas is injected into the liquid state. The input manifold is indicated by 2. A fuel rail 3 is configured, which can be provided with different holes where valves can be mounted, on this input manifold. These valves can be fastened in any manner known in the art previous. The discharge valve 11 of the valve opens towards the intake manifold. The discharge gate 11 opens on the other side towards an opening 10 in a seat plate 8. The body of the valve 9 can be connected with this seat plate 8 in a sealing manner. The body of the valve 9 is enclosed in a chamber of the valve 23, which is delimited by the seat plate 8 described above, the stop plate 24, and the adjusting ring 5. The distance between the plates 8 and 24 is determines by the thickness of the adjusting ring 5. When exchanging the ^ w 1 adjusting ring, the distance between the plates can be varied, and consequently, the valve lift of the valve body 9. The adjusting ring 5 is provided with openings 5 6 emerging into an annular conduit 7, which connects with the fuel rail 3. The valve body 9 is connected with a driving rod 12. This can be a rod made of steel, and has a diameter of + 3 millimeters. This rod is attached to the valve housing 25 with the diaphragms 13 and 14. Both the diaphragm 13 and the diaphragm 14 are provided with an opening. Sealing is achieved by means of the different O-rings. The actuator rod 12 is connected to a cylindrical ferromagnetic part 15 which is moves in a translational manner in the hole 16. The ferromagnetic part 15 interacts with the core 19 of a coil, which is indicated globally by 17, and is provided with a coil 18. The power supply of this coil is indicated by Furthermore, a spring 20, whose pre-tension can be established by means of the adjusting screw 21, acts on the cylindrical ferromagnetic part 15. Due to the selected configuration of the valve body 9 and the extraction opening 10 in the chamber 23, the gas pressure from the intake 4 will exert a force to act in the closing direction on the valve body. The sealing between the valve body and the seat plate can be achieved in a particularly simple manner, since the seat plate merely has to be of a flat design. The actuator rod 12 has a certain degree! of elastic properties, which are important, in particular, when the valve is opened and closed. An example that can be given here is that the valve • operate at a pressure of 8 bar in the intake 4, while the pressure in the intake manifold is 2.2 bar 10 (supercharged engine). The opening area 10 is approximately 10 square millimeters, while the valve lift of the valve body 9 is 0.24 millimeters. If the valve used here is used for sequential injection, in addition to the usual advantages, furthermore, it is possible to design the control system in such a way that, specifically during startup, no gas is injected during the first 1 to 2 revolutions of the combustion engine. During this time, control of the The computer can set all parameters of the combustion engine in an optimal way. Only then does the fuel injection take place. From the drawing, it can be seen that the valve according to the invention can be of a design particularly compact and flat. In this way, the valve 9 can be used not only in the newly designed intake manifolds, but can also be retrofitted in existing installations. The seat plate 8 serves simultaneously as a sealing element for the valve body 9, and as a stop. The valve described above can be produced # in a particularly simple and economical way. Your delivery can be easily varied, at no additional cost, by varying the 10 adjustment ring, which is always required. As a result, it is possible that the delivery corresponds to the period of available admission. From the above, it is clear that numerous variants are possible on the valve shown above. All of these are considered to be within the scope of the present application, as defined in the appended claims.

Claims (7)

NOVELTY OF THE INVENTION Having described the above invention, it is considered as a novelty, and therefore, the content of the following is claimed as property: CLAIMS *

1. A gas valve to be configured in the 10 intake gate of an internal combustion engine, which comprises a discharge line that can be connected, on the one hand, to the intake gate, and which is connected, on the other hand, to a discharge opening to a chamber valve, are the valve chamber provided with a ^ 15 intake opening of a supply line to be connected to the gas supply; a valve body which closes the discharge opening, and which is configured in a displaceable manner in the valve chamber, and is connected to an actuating part, actuated by the coil, which is 20 present between the feed line and the discharge line, characterized in that the valve body is supported with tolerance between two plates, this tolerance determining the stroke of the valve body, and whose plates are kept apart by an adjusting ring 25 interchangeable.

2. A gas valve according to claim 1, characterized in that the adjusting ring is provided with a series of radial intake openings along its circumference.

3. A gas valve according to claim 1, characterized in that the actuating part comprises a driving rod that is configured translationally with respect to the valve housing, and at the remote end of the body of the valve. the valve is provided with a ferromagnetic member that is configured to interact with a coil, and a return element is configured on the actuator element.

4. A gas valve according to claim 3, characterized in that the guide element of the actuator rod comprises a diaphragm.

5. A gas valve according to claim 3 or 4, characterized in that the actuator rod is fastened, near the ends, to a diaphragm. A gas valve according to claim 3, characterized in that the coil comprises a ferromagnetic core around which a coil is formed, whose core comprises a free end face # 12, the member comprising actuator a cylindrical part provided with an end face designed to interact with the end face of the core. 7. A gas valve according to claim 1 of claim 3, characterized in that the return element comprises a spring acting on the ferromagnetic member.