CN1350117A

CN1350117A - Gas fuel injector

Info

Publication number: CN1350117A
Application number: CN00130695A
Authority: CN
Inventors: 罗马·普莱斯
Original assignee: IMPCO TECHNOLOGY Corp
Current assignee: Quantum Fuel Systems LLC
Priority date: 2000-10-20
Filing date: 2000-10-20
Publication date: 2002-05-22
Anticipated expiration: 2020-10-20
Also published as: CN1133808C

Abstract

The gas fuel injector possesses an electromagnetic solenoid coil with a flat rectangular armature which is supported on a valve seat and can be formed into a valve. It utilizes a pressure difference between one-side fuel pressure and atmosphere pressure in the other side discharge cavity or environmental pressure and an auxiliary closing force provided by spring supported on the armature to make the valve retain in closed position. It utilizes every pulse movement of said solenoid coil to drive armature and make it far away from its valve seat to form opened valve to provide gas injection from the injector. Said injector possesses a nozzle formed into one body together with, on the armature a central hole is formed, and two holes capable of allowing gas to pass through injector are formed by means of side gaps formed along rectangular form of armature.

Description

Gaseous-fuel injector

The present invention relates to be used for the gaseous-fuel injector of propulsion system, more specifically, relate to a kind of like this sparger, it has utilized an o with flat armature, and described armature has formed the valve of a described sparger.

Gaseous fuel injection system is generally used for the motor fueling.The general spherical valve that uses of this type systematic, this spherical valve is assemblied on the pintle, and this pintle moves at the solenoid middle body.The No.5 that authorized on July 7th, 1998,775, No. 599 Patent publish a kind of typical existing fuel injector, the invention people of this patent is people and Granting of patent right ImpcoTechnologies companies such as Smith, i.e. the application's assignee.For this system can effectively work, fuel must provide enough lubricities to block at its duration of work to prevent plunger.Utilize liquid fuel can be easy to provide this lubricated, but under the situation that adopts gaseous fuel, it is this lubricated to rely on the micro-compressor oil of adding to realize.Requiring to improve under the situation of gaseous fuel purity, be extensive use of at present and do not used the compressor of oil, thereby avoided this oiling agent to enter in the fuel as oiling agent.But, save the existing gas ejector performance that oiling agent can cause using always and reduce.

In order to address this problem, developed such gaseous-fuel injector, it has a flat armature, and this armature directly is placed on the valve seat to form fuel valve.In disclosed patent No.5 on September 20th, 1994, disclosed this device in 348,233 people such as RomanPress, Roman Press is the present inventor.Solved the wear problem on the valve system though this is formerly invented, its shortcoming is to have an exhaust nozzle that does not constitute one with sparger, therefore is difficult for producing by batch.In addition, this device of formerly inventing is suitable for the conveying of fuel to its middle body, rather than resembles and carry from the top the present invention.In addition, can not be as device of the present invention, the device in the mode identical with petrol injector this formerly being invented is designed to be installed between a fuel rail and the jetburner.

Device of the present invention has overcome above-mentioned defective of the prior art by utilizing a gaseous-fuel injector, and described sparger is suitable in the mode identical with petrol injector, fuel is delivered to an ejector nozzle from a fuel rail.Described device has used a solenoid that is installed in an enclosure interior.Described solenoid has a rectangle armature, and this armature has a flat plane, and when being in its " normally " or closed position, armature is resisted against on the valve base piece to form a fluid valve.Together with the pressure that provides by a spring armature is remained on this closed position by the pressure reduction between gaseous-pressure and atmospheric pressure.When driving described solenoid by the injection control impuls, these pulses of response valve are opened described valve to allow ejecting pulsed gas from sparger.Armature part in the central has a hole, so that can increase fluid flow and reduce to drive the required power of armature.Equally, the rectangular configuration of armature provides the auxiliary fluid flow along the armature side.Make fuel be delivered into sparger, and discharge through the other end at sparger one end.In the time will being delivered to solenoid, correspondingly driving armature and spray so that the fuel of discharging from sparger to be provided corresponding to the electrical pulse that ideal fuels is sprayed.

Therefore, one object of the present invention is to provide a kind of improved gaseous-fuel injector, and it has prolonged the working life of intermediate injector part significantly.

Another object of the present invention is to improve the working efficiency of gaseous-fuel injector.

In conjunction with respective drawings, will be expressly understood other purpose of the present invention by following description.

Fig. 1 is an end elevation view of a preferred embodiment of the present invention;

Fig. 2 is along the viewgraph of cross-section shown in the plane that 2-2 among Fig. 1 indicates;

Fig. 3 is along the viewgraph of cross-section shown in the plane that 3-3 among Fig. 1 indicates;

Fig. 4 is for describing fluid valve viewgraph of cross-section in the closed position in the most preferred embodiment;

Fig. 5 is in the viewgraph of cross-section of enable possition for fluid valve in the description most preferred embodiment;

Fig. 6 is the perspective exploded view of fluid valve in the most preferred embodiment.

With reference to accompanying drawing, a most preferred embodiment of the present invention is described.

Sparger has a housing 11, and element is installed in this housing.One o with drive coil 12 and armature 13 is installed in enclosure interior.Can learn the most clearly that from Fig. 3 and 6 armature 13 is generally rectangular shape and has a central hole 13a.Hole 13a, being positioned at the sidepiece dead zone 10a of armature side and 10b and spacer ring 14 provides the hole that is used for the air-flow discharging.Shown in paired dotted line among right-hand side Fig. 6, armature 13 is soldered to sheet spring 24.So just, guaranteed the repeatability location of armature with respect to spacer ring 14 and valve seat 15.Gaseous fuel is sent into hole being arranged in center pole 29 and is discharged housing through outlet 11b through inlet 11a.

Spring 23 is resisted against on the armature, by the elastic force of adjusting screw rod 22 Regulation springs.The automatically controlled signal that is used to control solenoid and then control injection is imported through electrode 30, and is delivered to solenoid 12 from these electrodes.Central cylindrical pole piece 29 has a hole 21 that is used to provide the discharging of auxiliary fuel air-flow.Carry out noise suppression by a resonant cavity 18 and passage 16.Regulate the air-flow that sends from sparger by control valve 17.

Height by the distance selection control packing ring 14 between definite center pole 29 and the valve seat 15 turns round so that desirable armature to be provided, thus definite fuel flow rate that sends from sparger.

When spraying control signal when being delivered to coil 12 with one, with the stroke of spring 23 and act on the armature opposite side and spring 23 strokes on pressure reduction opposite, upwards draw armature 13.As shown in Figure 5, overcome the barrier driving armature that is arranged in the housing,, thereby allow gas stream to cross sparger so that open valve away from valve seat 15 by the traction armature.

Do not having under the situation of control signal, as shown in Figure 4, by the effect of helical spring 23 and sheet spring 24, simultaneously armature is resisted against on the valve seat 15, making armature valve remain on its closed position.

Should be noted that, be used for to the motor transfer the fuel though disclosed device of the present invention,, this device also can be used in other occasion that requires gaseous fuel to spray, as has been used to use the propulsion system of fuel cell.

Though the present invention has been done to describe in detail and explanation, should understand it only is illustrative example, protection scope of the present invention should be limited by the content in following claims.

Claims

1. gaseous-fuel injector that is used for gaseous fuel is delivered to a propulsion system, it comprises:

One housing;

One is installed in the electrically controlled injector in the described housing, and it has an armature and a solenoid;

Described armature is generally rectangle and has the surface of a general flat;

One valve base piece;

The flat surface of described armature becomes the relativeness of almost parallel with described valve base piece;

Be used to promote the device of described armature, with so that described flat surface be resisted against on the described valve base piece, so that the position of a draught excluder to be provided;

A discharge orifice that in described housing, forms;

Gaseous fuel is delivered into an end of described housing, discharges from the discharge orifice of its other end then;

Be used for described solenoid is carried the device of control impuls, move to an enable possition away from described valve base piece, thereby open valve sprays described housing to allow vaporized fuel from described outlet passage in order to drive described armature.

2. fuel injector according to claim 1 is characterized in that: be used to promote the described device that described armature is resisted against described valve base piece and comprise that one acts on the draught head on a described armature opposite side and the spring.

3. fuel injector according to claim 1, it is characterized in that: described armature has second plane to become relativeness with valve base piece, to be provided with respect to described plane, and comprise that also one is installed in the sheet spring on described second plane, this sheet spring is used for flexibly promoting described armature to described valve base piece.

4. fuel injector according to claim 1, it also comprises: one is assemblied in the spacer ring on the described housing.Described spacer ring has the predetermined altitude of having determined described armature move distance between its opening and closing position.

5. fuel injector according to claim 1 is characterized in that: described armature is formed with a hole, is used for when described armature is in its enable possition auxiliary fuel therefrom being passed through.

6. fuel injector according to claim 1, it is characterized in that: described sparger is whole to be formed, and has one at the one end and be used for gaseous fuel is imported the inlet of described sparger and had an outlet that is used for described fuel is discharged described sparger at its other end.

7. gaseous-fuel injector that is used for gaseous fuel is delivered to a propulsion system, it comprises:

One housing;

One valve base piece;

The flat surface of described armature becomes relativeness with described valve base piece;

In described housing, be used to suppress the device of noise;

Gaseous fuel is delivered into an end of described housing, discharges from its other end then;

Be used for described solenoid is carried the device of control impuls, be used to drive described armature and move to an enable possition, thereby open valve sprays described housing to allow vaporized fuel away from described valve base piece.