CN102734032A - High-pressure air-assisted fuel oil spray device - Google Patents
High-pressure air-assisted fuel oil spray device Download PDFInfo
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- CN102734032A CN102734032A CN2012102014739A CN201210201473A CN102734032A CN 102734032 A CN102734032 A CN 102734032A CN 2012102014739 A CN2012102014739 A CN 2012102014739A CN 201210201473 A CN201210201473 A CN 201210201473A CN 102734032 A CN102734032 A CN 102734032A
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- pressure air
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Abstract
The invention discloses a high-pressure air-assisted fuel oil spray device. In the device, an oil sprayer body is fixed on an engine cover; the upper end of the oil sprayer body is connected with an oil spray pressure adjusting bolt through a spiral pair; an oil spray base is arranged in a base hole at the upper end of the oil sprayer body, and is limited through the oil spray pressure adjusting bolt; a spring is arranged in the central through hole of the oil sprayer body; the upper part of the spring is pressed against the oil spray base; the lower end of the spring is pressed against a plunger base; the upper part of an oil spray plunger is embedded into the plunger base, and the lower part of the oil spray plunger is arranged in a nozzle; and the nozzle is arranged at the lower end of the oil sprayer body, and is tightly connected with the oil sprayer body through a joint sleeve. A variable timing cam is arranged on a high-speed stepping motor, and the outer edge of the variable timing cam is always pressed against the oil spray base. High-pressure air is introduced for assisting in fuel oil spray, so that the state of an oil film on the nozzle is improved, and carbon deposit is eliminated; the variable timing cam is adopted, so that the requirements of fuel oil spray amounts at different rotating speeds of an engine can be met; the high-speed stepping motor is adopted for driving the nozzle to work, so that accurate control is realized; and the high-pressure air-assisted fuel oil spray device is simple in structure, and is low in manufacturing cost.
Description
Technical field
The present invention relates to the high pressure fuel injection device, relate in particular to a kind of high-pressure air auxiliary fuel injection apparatus.
Background technique
At present, the high pressure fuel injection device that uses on the car always has little oil droplet at the nozzle place and assembles when fuel injection finishes; Because operating temperature is very high in the cylinder; Little oil droplet burn incompletely can form carbon distribution, has a strong impact on the fuel injection effect, can shorten oil sprayer working life in addition.High pressure fuel injection is low at motor, when middling speed turns round, adopt layering oiling pattern, and the automatical control system of oil sprayer is very complicated like this, and manufacture cost is high.
Summary of the invention
The objective of the invention is to deficiency, a kind of high-pressure air auxiliary fuel injection apparatus is provided to existing technology.
The objective of the invention is to realize: a kind of high-pressure air auxiliary fuel injection apparatus through following technological scheme; Be arranged in engine cylinder and cover, it comprises: oil injector body, injection pressure are regulated bolt, are become cam in correct time, high-speed stepper motor, oil spout seat, spring, plunger mat, injection plunger, nozzle and combined cover.Oil injector body is fixed on engine hood and covers, and it is that screw pair is connected that bolt is regulated with injection pressure in the oil injector body upper end, and the oil spout seat is installed in the seat hole of oil injector body upper end, and regulates bolt by injection pressure and carry out spacing; Spring is installed in the central through bore of oil injector body, and top is pressed against on the oil spout seat, and the lower end is pressed against on the plunger mat; Injection plunger top embeds plunger mat, and the bottom is installed in the nozzle; Nozzle is installed in the oil injector body lower end, tightens together through combined cover and oil injector body.Change cam in correct time is installed on the high-speed stepper motor, and its outer rim is pressed against on the oil spout seat all the time.The oil injector body inside left is arranged the high pressure air flue, and high-pressure oil duct is arranged on the right side, and two locating bumps are arranged on the oil injector body lower end surface, can embed respectively in the nozzle locating slot of upper end of nozzle face, and the high pressure air flue communicates with the nozzle air flue, and high-pressure oil duct communicates with the nozzle oil duct.Injection plunger is that trunk piston set cooperates with nozzle, and the needle-valve head of injection plunger inserts the oil gas mixing chamber of nozzle, and the valve core diameter on top is consistent with the injection diameter of nozzle.Become correct time the cam left side in, the low speed molded lines, the right side is the high speed molded lines.
The invention has the beneficial effects as follows:
1, introduces the high-pressure air auxiliary fuel and spray, improve the oil film state at nozzle place, eliminate carbon distribution;
2, adopt to become the cam in correct time, when satisfying the motor different rotating speeds to the requirement of fuel injection amount;
3, adopt high-speed stepper motor to drive nozzle operation, control accurately;
4, simple in structure, low cost of manufacture.
Description of drawings
Fig. 1 be high-pressure air auxiliary fuel injection apparatus of the present invention front view;
Fig. 2 be high-pressure air auxiliary fuel injection apparatus of the present invention left view;
Fig. 3 be high-pressure air auxiliary fuel injection apparatus of the present invention plan view;
Fig. 4 is the front view of nozzle;
Fig. 5 is the plan view of nozzle;
Fig. 6 is the front view of injection plunger;
Fig. 7 is the plan view of injection plunger;
Fig. 8 is the worm's eye view of oil injector body;
Fig. 9 is the front view that becomes positive hour wheel;
Among the figure: 1, oil injector body, 2, injection pressure regulates bolt, 3, become the cam in correct time, 4, high-speed stepper motor, 5, oil spout seat; 6, spring, 7, plunger mat, 8, injection plunger, 9, nozzle; 10, combined cover, 11, the high pressure air flue, 12, high-pressure oil duct, 13, the nozzle locating slot; 14, nozzle air flue, 15, the nozzle oil duct, 16, the oil gas mixing chamber, 17, locating bump.
Embodiment
Specify the present invention according to accompanying drawing below, it is more obvious that the object of the invention and effect will become.
As shown in Figure 1, high-pressure air auxiliary fuel injection apparatus of the present invention comprises: oil injector body 1, injection pressure are regulated bolt 2, change cam in correct time 3, high-speed stepper motor 4, oil spout seat 5, spring 6, plunger mat 7, injection plunger 8, nozzle 9 and combined cover 10.Oil injector body 1 is fixed on engine hood and covers, and bolt 2 is regulated for screw pair is connected with injection pressure in oil injector body 1 upper end, and oil spout seat 5 is installed in the seat hole of oil injector body 1 upper end, and regulates bolt 2 by injection pressure and carry out spacing; Spring 6 is installed in the central through bore of oil injector body 1, and top is pressed against on the oil spout seat 5, and the lower end is pressed against on the plunger mat 7; Injection plunger 8 tops embed plunger mat, and the bottom is installed in the nozzle 9; Nozzle 9 is installed in oil injector body 1 lower end, tightens together through combined cover 10 and oil injector body 1.Change cam in correct time is installed on the high-speed stepper motor 4, and its outer rim is pressed against on the oil spout seat 5 all the time.
Like Fig. 1; Fig. 2 and shown in Figure 8, oil injector body 1 inside left is arranged high pressure air flue 11, high-pressure oil duct 12 is arranged on the right side; Two locating bumps 17 are arranged on the oil injector body lower end surface; Can embed respectively in the nozzle locating slot 13 of nozzle 9 upper-end surfaces, high pressure air flue 11 communicates with nozzle air flue 14, and high-pressure oil duct 12 communicates with nozzle oil duct 15.
Shown in Fig. 4-7, injection plunger 8 and nozzle 9 are for trunk piston set cooperates, and the needle-valve head of injection plunger 8 inserts the oil gas mixing chamber of nozzle 9, and the valve core diameter on top is consistent with the injection diameter of nozzle 9.
As shown in Figure 9, become correct time cam 3 left sides in, the low speed molded lines, the right side is the high speed molded lines.
Working procedure of the present invention is following: the high pressure air flue 11 of oil injector body 1 is connected with high-pressure air all the time; Owing to there is not fuel injection signal, be in the oil-break state in the high-pressure oil passage 12, high-speed stepper motor 4 is not worked; Change cam in correct time 3 is positioned at the maximum lift place; Oil spout seat 5 is pressed in bottom, and this moment, the pretightening force of spring 6 was maximum, and acted on the pressure of injection plunger 8 needle-valve heads greater than high-pressure air; Injection plunger 8 tightly is pressed in the nozzle 9, and high-pressure air auxiliary fuel injection apparatus is not to the motor cylinder-in oil-jet.When ECU provides fuel injection signal, high-pressure oil passage 12 fuel feeding, high-speed stepper motor 4 beginning rotary works drive change cam in correct time 3 rotation together simultaneously.If engine operation in, during low speed, high-speed stepper motor 4 turns left, become correct time cam 3 use in, the low speed molded lines; Oil spout seat 5 rises, and spring 6 pressure reduce, and injection plunger 8 is backed down by pressurized gas; Fuel injection beginning, high pressure mixing gas gets into engine chamber; When change cam in correct time 3 reaches the minimum lift place, high-speed stepper motor 4 counter-rotatings, oil spout seat 5 presses down, and it is big that spring 6 pressure become, and injection plunger 8 is pushed back original position, high-pressure oil passage 12 cut-out fuel feeding, end of injection; If engine operation is when high speed, high-speed stepper motor 4 is turned right, become the correct time cam and 3 use the high speed molded lines, its working procedure with become cam 3 uses in correct time in, identical during the low speed molded lines.
Claims (4)
1. high-pressure air auxiliary fuel injection apparatus; Being arranged in engine cylinder covers; It is characterized in that it comprises: oil injector body (1), injection pressure are regulated bolt (2), are become cam in correct time (3), high-speed stepper motor (4), oil spout seat (5), spring (6), plunger mat (7), injection plunger (8), nozzle (9) and combined cover (10) etc.; Oil injector body (1) is fixed on engine hood and covers; Oil injector body (1) upper end is regulated bolt (2) with injection pressure and is connected for screw pair; Oil spout seat (5) is installed in the seat hole of oil injector body (1) upper end, and regulates bolt (2) by injection pressure and carry out spacing; Spring (6) is installed in the central through bore of oil injector body (1), and top is pressed against on the oil spout seat (5), and the lower end is pressed against on the plunger mat (7); Injection plunger (8) top embeds plunger mat, and the bottom is installed in the nozzle (9); Nozzle (9) is installed in oil injector body (1) lower end, tightens together through combined cover (10) and oil injector body (1); Change cam in correct time is installed on the high-speed stepper motor (4), and its outer rim is pressed against on the oil spout seat (5) all the time.
2. high-pressure air auxiliary fuel injection apparatus according to claim 1; It is characterized in that described oil injector body (1) inside left is arranged high pressure air flue (11), high-pressure oil duct (12) is arranged on the right side; Two locating bumps (17) are arranged on the oil injector body lower end surface; Can embed respectively in the nozzle locating slot of nozzle (9) upper-end surface, high pressure air flue (11) communicates with the nozzle air flue, and high-pressure oil duct (12) communicates with nozzle oil duct (14).
3. high-pressure air auxiliary fuel injection apparatus according to claim 1; It is characterized in that; Said injection plunger (8) cooperates for trunk piston set with nozzle (9); The needle-valve head of injection plunger (8) inserts the oil gas mixing chamber of nozzle (9), and the valve core diameter on injection plunger (8) top is consistent with the injection diameter of nozzle (9).
4. high-pressure air auxiliary fuel injection apparatus according to claim 1 is characterized in that, said change cam in correct time (3) left side in, the low speed molded lines, the right side is the high speed molded lines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102014739A CN102734032A (en) | 2012-06-19 | 2012-06-19 | High-pressure air-assisted fuel oil spray device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102014739A CN102734032A (en) | 2012-06-19 | 2012-06-19 | High-pressure air-assisted fuel oil spray device |
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| Publication Number | Publication Date |
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| CN102734032A true CN102734032A (en) | 2012-10-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012102014739A Pending CN102734032A (en) | 2012-06-19 | 2012-06-19 | High-pressure air-assisted fuel oil spray device |
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| CN (1) | CN102734032A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104500180A (en) * | 2014-12-03 | 2015-04-08 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Air-assisted selectablejet |
| CN110107437A (en) * | 2019-04-30 | 2019-08-09 | 上海理工大学 | Air-assisted atomization fuel injector and control method |
| CN112282995A (en) * | 2020-10-28 | 2021-01-29 | 哈尔滨工程大学 | Gas-phase jet-assisted premixed fuel injector and control method thereof |
| CN112855398A (en) * | 2021-03-11 | 2021-05-28 | 北京中康增材科技有限公司 | Oil injection device and design method thereof |
| CN113279885A (en) * | 2021-06-17 | 2021-08-20 | 江苏八方动力机械有限公司 | Novel oil sprayer |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2023724A (en) * | 1978-06-24 | 1980-01-03 | Plessey Co Ltd | A fuel injector |
| JPS5732055A (en) * | 1980-07-31 | 1982-02-20 | Nissan Motor Co Ltd | Fuel injection device in internal combustion engine |
| JPS58124062A (en) * | 1982-01-21 | 1983-07-23 | Nippon Soken Inc | Fuel injection device for diesel engine |
| JPS61190165A (en) * | 1985-02-18 | 1986-08-23 | Nippon Soken Inc | Needle lift amount control type fuel injection nozzle |
| JPH0486374A (en) * | 1990-07-30 | 1992-03-18 | Toyota Motor Corp | Fuel injection device for internal combustion engine |
| CN1241682A (en) * | 1999-04-08 | 2000-01-19 | 梁剑锐 | Secondary liquid spraying system with sealed nozzle cone mixing diesel oil and rustproof liquid |
-
2012
- 2012-06-19 CN CN2012102014739A patent/CN102734032A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2023724A (en) * | 1978-06-24 | 1980-01-03 | Plessey Co Ltd | A fuel injector |
| JPS5732055A (en) * | 1980-07-31 | 1982-02-20 | Nissan Motor Co Ltd | Fuel injection device in internal combustion engine |
| JPS58124062A (en) * | 1982-01-21 | 1983-07-23 | Nippon Soken Inc | Fuel injection device for diesel engine |
| JPS61190165A (en) * | 1985-02-18 | 1986-08-23 | Nippon Soken Inc | Needle lift amount control type fuel injection nozzle |
| JPH0486374A (en) * | 1990-07-30 | 1992-03-18 | Toyota Motor Corp | Fuel injection device for internal combustion engine |
| CN1241682A (en) * | 1999-04-08 | 2000-01-19 | 梁剑锐 | Secondary liquid spraying system with sealed nozzle cone mixing diesel oil and rustproof liquid |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104500180A (en) * | 2014-12-03 | 2015-04-08 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Air-assisted selectablejet |
| CN110107437A (en) * | 2019-04-30 | 2019-08-09 | 上海理工大学 | Air-assisted atomization fuel injector and control method |
| CN112282995A (en) * | 2020-10-28 | 2021-01-29 | 哈尔滨工程大学 | Gas-phase jet-assisted premixed fuel injector and control method thereof |
| CN112282995B (en) * | 2020-10-28 | 2021-12-21 | 哈尔滨工程大学 | Gas-phase jet-assisted premixed fuel injector and control method thereof |
| CN112855398A (en) * | 2021-03-11 | 2021-05-28 | 北京中康增材科技有限公司 | Oil injection device and design method thereof |
| CN113279885A (en) * | 2021-06-17 | 2021-08-20 | 江苏八方动力机械有限公司 | Novel oil sprayer |
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Application publication date: 20121017 |