CN108252836B - A kind of atomization type internal combustion engine solenoid fuel injection valve - Google Patents

Abstract

An atomized fuel injection solenoid valve for an internal combustion engine, the solenoid valve includes a valve body, a spray barrel, an extension part, a spray hole, a protrusion, a valve disc, a pressure relief channel, a joint, a sawtooth part, an electromagnetic coil, a bracket, an extension Terminal, detection channel, oil cylinder, oil inlet channel, oil inlet pipe, coil casing, valve stem inner hole, guide sleeve, valve stem, steel ball, joint channel, constriction part, piston, piston upper hole, piston left hole, piston right hole , Plug, first spring, L-shaped seat, second spring. An extension terminal is arranged above the electromagnetic coil, an oil cylinder is arranged above the extension terminal, a detection channel and an oil inlet channel are arranged in the oil cylinder, the oil inlet channel is connected with an oil inlet pipe, and a piston is accommodated in the oil cylinder. The piston is provided with a piston upper hole, a piston left hole, and a piston right hole. The piston upper hole is connected with the oil inlet passage, and the piston upper hole extends downwards to branch out of the piston left hole and the piston right hole. A second spring is arranged under the piston, an L-shaped seat is arranged under the second spring, and the first spring is arranged under the L-shaped seat.

Description

An atomized fuel injection solenoid valve for internal combustion engines

technical field

The invention relates to the related field of an internal combustion engine fuel injection system, in particular to an atomizing type internal combustion engine fuel injection solenoid valve.

Background technique

Internal combustion engines are widely used in the existing technology, such as transportation, large-scale equipment operation and other fields are widely used, which will be applied to the fuel injection system, the fuel injection system sends oil to the into the combustion chamber for combustion.

In actual use, the existing fuel injection system has the following problems:

1. During the injection process, it is inevitable that uneven injection will lead to insufficient combustion. In this regard, some existing technologies adopt the atomization method. However, the atomization structure in the prior art is often complicated and the cost is high. , such as using parts such as heat exchangers for atomization, the installation structure of the heat exchanger is relatively complicated, and there are many restrictions on its use.

2. In the prior art solenoid valve, due to blockage or pressure fluctuation, there is an overpressure in the oil chamber, and sometimes the pressure cannot be released in time.

3. There is a need to clean the oil cavity in the prior art, but it is difficult to clean it during operation and maintenance.

4. In the prior art solenoid valve, when the oil supply pressure is relatively high due to oil supply deviation, water hammer is prone to occur.

5. It is difficult for the electromagnetic coil structure in the prior art to take into account the problems of firmness, large magnetic flux and material saving at the same time.

Contents of the invention

In order to overcome the above-mentioned problems, the present invention proposes a valve that simultaneously solves the above-mentioned various problems.

The technical solution adopted by the present invention to solve the technical problem is: an atomized internal combustion engine fuel injection solenoid valve, the solenoid valve includes a valve body, a spray barrel, an extension, a spray hole, a protrusion, a valve disc, and a pressure relief channel , joints, serrated parts, electromagnetic coils, brackets, extension terminals, detection channels, oil cylinders, oil inlet channels, oil inlet pipes, coil shells, valve stem inner holes, guide sleeves, valve stems, steel balls, joint channels, shrinkage parts, Piston, upper hole of piston, left hole of piston, right hole of piston, plug, first spring, L-shaped seat, second spring; there is a closing port under the valve body to form the valve seat, the valve disc cooperates with the valve seat, and the valve disc and the valve seat A seal is formed between them, the diameter of the valve disc is larger than the diameter of the valve seat opening, and the diameter of the valve disc is smaller than the diameter of the valve inner cavity; the upper part of the valve disc is connected with the valve stem, and the lower part of the valve disc extends downward to form the auxiliary valve stem part. A protrusion is extended radially outward, and the protrusion is matched with a stroke groove on the spray barrel, and the stroke groove is in a spiral shape. As the auxiliary valve stem moves, the protrusion rises in the stroke groove, so that the spray barrel rotates , the lower part of the spray tube is provided with an extension part extending out of the valve body, and the lower part of the extension part is provided with a tapered part, and the tapered part is provided with a number of injection holes; in addition to the stroke groove, the spray tube is also provided with An oil guide groove, the oil guide groove extends spirally from the upper end of the spray barrel to the inner cavity of the spray barrel; a guide sleeve is provided above the inner cavity of the valve body, and a pressure relief valve is provided on the left side of the guide sleeve channel, a joint is provided on the left side of the pressure relief channel, a joint channel is provided above the left side of the joint, a contraction part is provided on the right side of the joint, and a steel ball is accommodated in the contraction part, and the steel ball passes through the spring Connected with the joint; the valve stem is made of magnetic material, with a stem inner hole extending from the upper end of the valve stem to the right end of the valve stem to communicate with the inner cavity of the valve stem, and the upper end of the valve stem has a second A spring, an L-shaped bracket is provided at both ends of the valve stem, the electromagnetic coil is accommodated in the bracket, a coil casing is provided on the outside of the electromagnetic coil, and a sawtooth portion is provided on the outside of the coil casing; An extension terminal, an oil cylinder is arranged above the extension terminal, a detection channel and an oil inlet channel are arranged in the oil cylinder, the oil inlet channel is connected with an oil inlet pipe, a piston is accommodated in the oil cylinder, and a piston is arranged in the piston The upper hole, the left hole of the piston, and the right hole of the piston, the upper hole of the piston is connected with the oil inlet channel, the upper hole of the piston extends downwards and branches into the left hole of the piston and the right hole of the piston, the lower part of the piston is provided with a plug, and the lower part of the piston is provided with a plug. There is a second spring, an L-shaped seat is arranged under the second spring, and the first spring is arranged under the L-shaped seat.

Preferably, the valve stem is also provided with a stroke limiting structure.

Preferably, the stroke limiting structure is a short column.

Preferably, the stroke limiting structure is a snap ring.

Preferably, the injection holes include radial holes and vertical holes.

Preferably, the injection holes are evenly distributed.

Preferably, the coil housing is made of plastic.

Preferably, the inclinations of the travel groove and the oil guide groove are different.

The beneficial effects of the present invention are:

1. In view of the first point raised in the background technology, the design idea is adjusted, no longer seeking direct physical atomization, but adjusting the spray structure at the nozzle end to form an effect similar to atomization.

2. In view of the 2nd and 3rd points raised in the background technology, a joint and a pressure opening structure are arranged above the oil chamber side.

3. Aiming at point 4 of the background technology, a self-pressure-adjusting closed piston structure is adopted.

4. Aiming at point 5 of the background technology, a sawtooth mechanism is adopted, taking into account the issues of firmness, large magnetic flux, and material saving.

Note: the above-mentioned designs are in no particular order, and each of them makes the present invention have difference and remarkable progress compared with the prior art.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is an overall schematic diagram of the solenoid valve of the present invention.

Fig. 2 is a partial view of the joint structure of the present invention.

Fig. 3 is a partial view of the self-pressure adjusting sealing structure of the present invention.

Fig. 4 is a structural diagram of the stroke groove of the oil guide groove of the present invention.

In the figure, the reference signs are as follows:

1. Valve body 2, spray barrel 2a, extension part 3, injection hole 3a, stroke groove 3b, oil guide groove 4, protrusion 5, valve flap 6, pressure relief channel 7, joint 8, serrated part 9, electromagnetic coil 10, Bracket 11, extension terminal 12, detection channel 13, oil cylinder 14, oil inlet channel 15, oil inlet pipe 16, coil casing 17, valve stem inner hole 18, guide sleeve 19, valve stem 20, steel ball 21, joint channel 22, Contraction part 23, piston 24, piston upper hole 25, piston left hole 26, piston right hole 27, plug 28, second spring 29, L-shaped seat 30, first spring.

Detailed ways

As shown in the figure: an atomized internal combustion engine fuel injection solenoid valve, the solenoid valve includes a valve body, a spray barrel, an extension, a spray hole, a protrusion, a valve disc, a pressure relief channel, a joint, a serration, and an electromagnetic coil , bracket, extension terminal, detection channel, oil cylinder, oil inlet channel, oil inlet pipe, coil casing, valve stem inner hole, guide sleeve, valve stem, steel ball, joint channel, contraction part, piston, piston upper hole, piston left Hole, piston right hole, plug, first spring, L-shaped seat, second spring; there is a closing port under the valve body to form a valve seat, and the valve disc cooperates with the valve seat to form a seal between the valve disc and the valve seat. The diameter is larger than the opening diameter of the valve seat, and the diameter of the valve disc is smaller than the diameter of the inner cavity of the valve body; the upper part of the valve disc is connected with the valve stem, and the lower part of the valve disc extends downward to form the auxiliary valve stem part, and the auxiliary valve stem part extends radially outward to protrude , the protrusion cooperates with the stroke groove on the spray barrel, and the stroke groove is in a spiral shape. With the movement of the auxiliary valve stem, the protrusion rises in the stroke groove, so that the spray barrel rotates. Extending out of the extension part of the valve body, there is a tapered part under the extension part, and a number of injection holes are arranged on the tapered part; besides the stroke groove, an oil guide groove is also provided on the spray barrel, and the oil guide groove is in the form of Helically extending from the upper end of the spray barrel to the inner cavity of the spray barrel.

As shown in the figure: a guide sleeve is provided above the inner cavity of the valve body, a pressure relief channel is provided on the left side of the guide sleeve, a joint is provided on the left side of the pressure relief channel, and a joint is provided above the left side of the joint Channel, the right side of the joint is provided with a contraction part, the contraction part contains a steel ball, the steel ball is connected to the joint through a spring; the valve stem is made of magnetic material, and an inner hole of the valve stem is provided. The inner hole of the valve stem extends from the upper end of the valve stem to the right end of the valve stem to communicate with the inner cavity of the valve stem, the upper end of the valve stem is provided with a first spring, and the two ends of the valve stem are provided with L-shaped brackets, which accommodate the The electromagnetic coil is provided with a coil casing on the outside of the electromagnetic coil, and a sawtooth portion is arranged on the outside of the coil casing.

As shown in the figure: an extension terminal is arranged above the electromagnetic coil, an oil cylinder is arranged above the extension terminal, a detection channel and an oil inlet channel are arranged in the oil cylinder, the oil inlet channel is connected with an oil inlet pipe, and the oil cylinder A piston is contained in the piston, and the piston is provided with a piston upper hole, a piston left hole, and a piston right hole. The piston upper hole is connected with the oil inlet passage, and the piston upper hole extends downwards to branch out of the piston left hole and the piston right hole. The lower part of the piston is provided with a plug, the second spring is arranged under the piston, the L-shaped seat is arranged under the second spring, and the first spring is arranged under the L-shaped seat.

As shown in the figure: the valve stem is also provided with a stroke limiting structure. The stroke limiting structure is a short column. The stroke limiting structure is a snap ring. The injection holes include radial holes and vertical holes. The injection holes are evenly distributed. The coil shell is made of plastic. The inclinations of the travel groove and the oil guide groove are different.

The above detailed description is a specific description of the feasible embodiment of the present invention. This embodiment is not used to limit the patent scope of the present invention. Any equivalent implementation or change that does not deviate from the present invention should be included in the patent scope of this case. middle.

Claims (6)

1. a kind of atomization type internal combustion engine solenoid fuel injection valve, the solenoid valve include valve body, spray canister, extension, spray-hole, protrusion, Flap, pressure release passage, connector, sawtooth portion, electromagnetic coil, bracket, extension terminal, sense channel, oil cylinder, oil inlet passage, oil inlet Pipe, coil case, valve rod inner hole, guide sleeve, valve rod, steel ball, connector channel, contraction flow region, piston, hole, piston left hole, work on piston Fill in right hole, plug, the first spring, L shape seat, second spring；

Valve seat is formed it is characterized by: having to close up below valve body, flap and valve seat cooperate, and are formed between flap and valve seat close Envelope, the diameter of flap are greater than valve seat opening diameter, and the diameter of flap is less than the diameter of body cavity；Connect above flap with valve rod It connects, auxiliary valve rod part is downwardly extending below flap, auxiliary valve rod partially radially extends outward protrusion, and spray canister is equipped with stroke Slot, the protrusion cooperate with the stroke groove in spray canister, and the stroke groove in the shape of a spiral, with the movement of auxiliary valve rod, be expert at by protrusion It is lifted in journey slot, so that spray canister rotates, the extension for extending valve body is equipped with below the spray canister, is equipped with taper below extension Part, the conical section are equipped with several spray-holes；In the spray canister in addition to stroke groove, it is additionally provided with oil guide groove, the Oil Guide Slot extends in the inner cavity of the spray canister from the spray canister upper end in the shape of a spiral；

It is equipped with guide sleeve above the inner cavity of the valve body, pressure release passage is equipped on the left of the guide sleeve, is equipped on the left of the pressure release passage Connector, connector left side top are equipped with connector channel, contraction flow region are equipped on the right side of the connector, accommodates steel in the contraction flow region Ball, the steel ball are connect by spring with connector；

The valve rod is made of magnetic material, is provided with valve rod inner hole, and the valve rod inner hole extends to valve rod from valve rod upper end Right end is connected to body cavity, and the valve rod upper end is equipped with the first spring, and the valve rod both ends are equipped with L-bracket, accommodate in bracket The electromagnetic coil, electromagnetic coil outside are equipped with coil case, are equipped with sawtooth portion on the outside of the coil case；

It is equipped with extension terminal above the electromagnetic coil, oil cylinder is equipped with above the extension terminal, is equipped with detection in the oil cylinder Channel and oil inlet passage, the oil inlet passage are connect with oil inlet pipe, and piston is accommodated in the oil cylinder, is equipped with and lives in the piston Hole, piston left hole, piston right hole beyond the Great Wall, hole is connect with oil inlet passage on piston, and hole, which extends downwardly, on piston branches out a piston left side Hole, piston right hole, the piston lower portion are equipped with plug, second spring are equipped with below the piston, is set below the second spring There is L shape seat, is equipped with first spring below the L shape seat；The spray-hole includes radial hole and vertical hole；The spray-hole It is uniformly distributed.

2. a kind of atomization type internal combustion engine solenoid fuel injection valve according to claim 1, it is characterised in that: also set on the valve rod There is stroke limit structure.

3. a kind of atomization type internal combustion engine solenoid fuel injection valve according to claim 2, it is characterised in that: the stroke limit knot Structure is short column.

4. a kind of atomization type internal combustion engine solenoid fuel injection valve according to claim 2, it is characterised in that: the stroke limit knot Structure is snap ring.

5. a kind of atomization type internal combustion engine solenoid fuel injection valve according to claim 1, it is characterised in that: the coil case is adopted It is made of plastic.

6. a kind of atomization type internal combustion engine solenoid fuel injection valve according to claim 1, it is characterised in that: the stroke groove and institute It is different to state oil guide groove gradient.