CN2895762Y - Diesel engine fuel-oil jetting system - Google Patents
Diesel engine fuel-oil jetting system Download PDFInfo
- Publication number
- CN2895762Y CN2895762Y CN 200620041288 CN200620041288U CN2895762Y CN 2895762 Y CN2895762 Y CN 2895762Y CN 200620041288 CN200620041288 CN 200620041288 CN 200620041288 U CN200620041288 U CN 200620041288U CN 2895762 Y CN2895762 Y CN 2895762Y
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- fuel
- injection system
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Abstract
The utility model discloses a diesel engine fuel injection system, including an oil-feeding pump (21), and an oil adjuster (22), an oil sprayer (25). The device is characterized in that an oil accumulator apparatus (23) is used to cumulate the oil coming from the oil-feeding pump under invariable condition with high pressure, the oil accumulator apparatus connects with the oil-sprayer through a high pressure fuel pipe (203). A high speed magnetic valve (24) is arranged on the high pressure fuel pipe to control the on/off of fuel supply; the oil adjuster monitors the pressure of the oil accumulator apparatus and adjusts the oil supply from the oil-feeding pump according to the pressure and the preset point of the pressure. The fuel injection system of the utility model adopts an electron controlling unit (26) to control the whole jetting process, the electron controlling unit obtains a rotating speed signal of the diesel engine and a starting signal of fuel injection through a crank signal panel (27) and a sensor (28), controls the open and close of the electromagnetic valve. The electron controlling unit can export preset pressure to the oil adjuster. Through the constant high-pressure oil-accumulation, the device can reach the effect of accurate time-controlling, fuel injection volume, and oil-jetting pressure effect and provide required pulverization quality of fuel.
Description
Technical field
The utility model relates to a kind of diesel fuel injection system, relates in particular to a kind of diesel fuel injection system that can accurately control fuel-injection pressure, time for spraying and emitted dose.
Background technique
Fuel injection system is the ejecting system of a kind of injected fuel for diesel combustion, and it mainly acts on is according to diesel engine operating mode control fuel injection quantity, and to fuel oil pressurization, high-pressure injection atomized fuel.Fig. 1 illustrates existing a kind of mechanical diesel fuel injection system, and it mainly is made of parts such as hydraulic injection pump 10, oil sprayer 11, high-pressure oil pipe 13, electronic speed regulators 14.Behind the engine start, the fuel cam 101 beginning rotary pump oil of hydraulic injection pump 10 after the oil feed pump plunger pressurization of the low-voltage fuel in the fuel tank 16 in oil feed pump 10, are sent into oil sprayer 11 through high-pressure oil feed pipe 13, realize fuel injection.Be located at the electronic speed regulator 14 detection of engine tach signals of hydraulic injection pump 10 1 sides, compare, form the position that control rack 102 is adjusted in closed loop control, reach the adjusting fuel delivery with the setting tachometer value, and then the purpose of stabilized (steady-state) speed.
Above-mentioned this mechanical type fuel injection system, its oil spout is by the decision of the molded lines of cam 101 constantly, when cam 101 bumps promote plunger, then oil feed pump 10 oil spouts, directly be ejected in the cylinder through the fuel oil after the pressurization by oil sprayer 11, charge oil pressure is pulsed, and from the charge oil pressure plotted curve of this mechanical type fuel injection system oil pump shown in Figure 2, can find out clearly that charge oil pressure P changes along with the variation of cam rotation speed n.Because the intrinsic defective of mechanical type system makes that the jet pressure of fuel oil is bigger with the cam rotation speed change, under the lower operating mode of rotating speed, jet pressure is also lower, therefore service behaviour is relatively poor, pulse owing to pressure simultaneously, be difficult to realize complicated injection control, to reach the requirement of the accurate control oil spout moment, injection pressure and fuel injection quantity.
Summary of the invention
Technical problem to be solved in the utility model provides the diesel fuel injection system of a kind of accurate control fuel-injection pressure, time for spraying and emitted dose.
The utility model is to solve the problems of the technologies described above the technological scheme that adopts to be:
A kind of diesel fuel injection system, comprise: the oil feed pump of can pump into low-voltage fuel from a fuel tank, fuel oil being exported in the back of pressurizeing from its oil outlet tube, regulate the oil regulator of this oil feed pump fuel delivery by the control rack that spurs this oil feed pump, and the oil sprayer that is used for injected fuel, it is characterized in that, also comprise:
Hold oily device, be connected, be used for accumulating fuel feeding from this oil feed pump with a setting pressure state with the oil outlet tube of described oil feed pump;
Solenoid valve comprises one first end and one second end, and this first end holds oily device and is connected with described, and this second end is connected with described oil sprayer, and it receives a start signal or a shutdown signal to control second end and first end connects or disconnects;
The crankshaft signal dish that has hypodontia is in transmission connection with the bent axle of diesel engine;
Close at least one crankshaft sensor that this crankshaft signal plate edge is provided with;
Electronic control unit, be connected with described crankshaft sensor, oil regulator and solenoid valve, this electronic control unit obtains a hypodontia signal and diesel engine speed signal from described crankshaft sensor, to described solenoid valve, this electronic control unit is also exported a setup pressure value to described oil regulator according to this hypodontia signal output start signal;
Described oil regulator and be located at the described pressure transducer that holds on the oily device and be connected, obtain the pressure that holds oily device by this pressure transducer, and the setup pressure value that described pressure and the electronic control unit that holds in the oily device exported compares, pressure in described high-pressure common rail pipe improves the fuel delivery of described oil feed pump during less than setup pressure value, at the described fuel delivery that reduces described oil feed pump when holding pressure in the oily device greater than setup pressure value.
Described diesel fuel injection system, wherein, described to hold oily device be a high-pressure common rail pipe.
Described diesel fuel injection system wherein, describedly holds oily device and is provided with a bleeder valve.
Described diesel fuel injection system, wherein, described solenoid valve also comprises one the 3rd end, and the return tube that the 3rd end and leads to described fuel tank is connected, when described second end of described electronic control unit controls and first end disconnected, it was logical to control the 3rd end and described second termination.
Described diesel fuel injection system comprises two crankshaft sensors, and this two crankshaft sensor all links to each other with described electronic control unit, to export two paths of signals to this electronic control unit.
Described diesel fuel injection system, wherein, described oil regulator is made of electronic speed regulator.
Described diesel fuel injection system, wherein, described oil feed pump is made of the mechanical type oil feed pump.
Described diesel fuel injection system, wherein, described electronic control unit is made of SCM Based microcontroller.
Owing to hold the constant pressure in the oily device, what of fuel injection quantity the opening and closing of solenoid valve just determined, and oil spout obtains by the hypodontia calculated signals constantly, fuel injection no longer is subjected to the restriction of fuel cam like this, just can realize fuel injection quantity and oil spout flexible control constantly, because fuel-injection pressure maintains high pressure conditions, improved the fuel-injected atomization quality simultaneously.
The utility model advantage compared to existing technology is:
1, realizes electronic fuel injection.Because adopted common rail pipe to carry out pressure accumulation processing and use high-speed electromagnetic valve, the injection of oil sprayer is not subjected to the influence of fuel cam, can realize jet pressure, time for spraying and fuel injection quantity control;
2, can improve engine performance.Because the raising of jet pressure makes the fuel-injected quality improve, the Economy and the emission performance of diesel engine improve a lot.
3, inheritance is strong, and repacking is simple.Continue to continue to use existing conventional mechanical type oil feed pump (pump in upright arrangement or monoblock pump), electronic speed regulator and oil sprayer, only need increase few parts and need not change body, are particularly suitable for the rebuilding at low cost of existing machinery fuel injection system.
Description of drawings
Below in conjunction with the drawings and specific embodiments feature and advantage of the present utility model are described, wherein:
Fig. 1 is the structural representation of existing a kind of mechanical type diesel fuel injection system;
Fig. 2 is the charge oil pressure variation diagram of fuel injection system shown in Figure 1;
Fig. 3 is a diesel fuel injection system structural representation of the present utility model.
Embodiment
See also shown in Figure 3ly, diesel fuel injection system of the present utility model mainly comprises oil feed pump 21, oil regulator 22, high-pressure common rail pipe 23, three-way magnetic valve 24, oil sprayer 25, electronic control unit (ECU) 26 and crankshaft signal dish 27 and crankshaft sensor 28.Wherein oil feed pump 21 links to each other with fuel tank 20 by oil pipe 201, and is connected to high-pressure common rail pipe 23 by high pressure oil outlet tube 202.The high-pressure common rail pipe links to each other with first end 241 of three-way magnetic valve 24 by high-pressure oil pipe 203, and second end 242 of three-way magnetic valve 24 links to each other with oil sprayer 25, and the 3rd end 243 links to each other with the reflow pipe 204 that leads to fuel tank 20.
High-pressure common rail pipe 23 is to hold oily device as of the present utility model, be used for the fuel oil in the pipe is remained on a high pressure conditions of setting, high-pressure common rail pipe 23 should have enough volumes, and with the pressure that still can keep relative stability when fuel-displaced, common rail pipe should have the intensity of bearing high pressure simultaneously.Oil pressure relief valve 231 is installed on the common rail pipe 23; when the fuel pressure in the common rail pipe 23 exceeds the design safety pressure of common rail pipe owing to certain uncertain factor; bleeder valve 231 is opened automatically; the fuel oil in the pipe through the return tube fuel tank 30 of releasing; close voluntarily after normal when pressure recovery, realize safety protection function.
High-pressure common rail pipe 23 is provided with a pressure transducer 221, and this pressure transducer 221 links to each other with oil regulator 22.Oil regulator 22 is converted by original electronic speed regulator, it still regulates the fuel delivery of oil feed pump 21 by the control rack 213 of pulling oil feed pump 21, different is that it no longer carries out closed loop control to the rotating speed of motor, but the fuel pressure of common rail pipe 23 is carried out closed loop control.Specifically, oil regulator 22 obtains the pressure of common rail pipe 23, and with setting value relatively, if the pressure in the high-pressure common rail pipe 23 is less than setup pressure value, then spur the control rack 213 of oil feed pump 21 to the direction that increases fuel delivery, if the pressure in the described high-pressure common rail pipe 23 during greater than setup pressure value, then spur this control rack 213 to the direction that reduces fuel delivery, so oil regulator 22 makes the fuel oils in the common rail pipe 23 be stabilized on the force value of setting.Therefore this design is easy to make injection pressure to keep a constant high pressure, improves the oil atomizing quality.
This setup pressure value is provided by electronic control unit 26, and in the present embodiment, electronic control unit 26 is based on the embedded controller of single-chip microcomputer, and it is set described force value and transmits it to oil regulator 22.Except that setup pressure value, its task is controlled the unlatching moment and the close moment of three-way magnetic valve 24 in addition.
Manys' cylinder is arranged, when needing to adopt the three-way magnetic valve of a plurality of oil sprayers and correspondence thereof in system.Can control the oil spout of a plurality of oil sprayers equally by electronic control unit 26.Specifically, a plurality of oil sprayers are connected to high-pressure common rail pipe 23 by each self-corresponding three-way magnetic valve, electronic control unit 26 opens the spray signal with the hypodontia signal as first cylinder, and open unlatching that the spray calculated signals goes out cylinder number corresponding three-way magnetic valve after this constantly and close moment according to diesel engine speed signal and first cylinder, realize the automatic control of manys' cylinder oil spout.Because the oil spout injection process of each cylinder is identical, therefore repeat no more.
Because the constant pressure in the high-pressure common rail pipe 23, what of fuel injection quantity the opening and closing of solenoid valve 25 just determined, and oil spout obtains by the hypodontia calculated signals constantly, fuel injection no longer is subjected to the restriction of fuel cam like this, just can realize fuel injection quantity and oil spout flexible control constantly, because fuel-injection pressure maintains high pressure conditions, improved the fuel-injected atomization quality simultaneously.
Claims (8)
1. diesel fuel injection system, comprise: the oil feed pump of can pump into low-voltage fuel from a fuel tank, fuel oil being exported in the back of pressurizeing from its oil outlet tube, regulate the oil regulator of this oil feed pump fuel delivery by the control rack that spurs this oil feed pump, and the oil sprayer that is used for injected fuel, it is characterized in that, also comprise:
Hold oily device, be connected, be used for accumulating fuel feeding from this oil feed pump with a setting pressure state with the oil outlet tube of described oil feed pump;
Solenoid valve comprises one first end and one second end, and this first end holds oily device and is connected with described, and this second end is connected with described oil sprayer, and it receives a start signal or a shutdown signal to control second end and first end connects or disconnects;
The crankshaft signal dish that has hypodontia is in transmission connection with the bent axle of diesel engine;
Close at least one crankshaft sensor that this crankshaft signal plate edge is provided with;
Electronic control unit, be connected with described crankshaft sensor, oil regulator and solenoid valve, this electronic control unit obtains a hypodontia signal and diesel engine speed signal from described crankshaft sensor, to described solenoid valve, this electronic control unit is also exported a setup pressure value to described oil regulator according to this hypodontia signal output start signal;
Described oil regulator and be located at the described pressure transducer that holds on the oily device and be connected, obtain the pressure that holds oily device by this pressure transducer, and the setup pressure value that described pressure and the electronic control unit that holds in the oily device exported compares, pressure in described high-pressure common rail pipe improves the fuel delivery of described oil feed pump during less than setup pressure value, at the described fuel delivery that reduces described oil feed pump when holding pressure in the oily device greater than setup pressure value.
2. diesel fuel injection system as claimed in claim 1 is characterized in that, described to hold oily device be a high-pressure common rail pipe.
3. diesel fuel injection system as claimed in claim 1 is characterized in that, describedly holds oily device and is provided with a bleeder valve.
4. diesel fuel injection system as claimed in claim 1, it is characterized in that, described solenoid valve also comprises one the 3rd end, the return tube that the 3rd end and leads to described fuel tank is connected, when described second end of described electronic control unit controls and first end disconnected, it was logical to control the 3rd end and described second termination.
5. diesel fuel injection system as claimed in claim 1 is characterized in that, comprises two crankshaft sensors, and this two crankshaft sensor all links to each other with described electronic control unit, to export two paths of signals to this electronic control unit.
6. diesel fuel injection system as claimed in claim 1 is characterized in that described oil regulator is made of electronic speed regulator.
7. diesel fuel injection system as claimed in claim 1 is characterized in that described oil feed pump is made of the mechanical type oil feed pump.
8. diesel fuel injection system as claimed in claim 1 is characterized in that described electronic control unit is made of SCM Based microcontroller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620041288 CN2895762Y (en) | 2006-04-25 | 2006-04-25 | Diesel engine fuel-oil jetting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620041288 CN2895762Y (en) | 2006-04-25 | 2006-04-25 | Diesel engine fuel-oil jetting system |
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| CN2895762Y true CN2895762Y (en) | 2007-05-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200620041288 Expired - Fee Related CN2895762Y (en) | 2006-04-25 | 2006-04-25 | Diesel engine fuel-oil jetting system |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101377180B (en) * | 2007-08-31 | 2011-01-12 | 株式会社电装 | Fuel injection controller for internal combustion engine |
| CN102155313A (en) * | 2011-04-11 | 2011-08-17 | 吉林大学 | Device for distinguishing position of crank shaft in stop of engine |
| CN102287270A (en) * | 2011-06-30 | 2011-12-21 | 徐玉国 | Constant high pressure injection system for diesel fuel |
| CN102989711A (en) * | 2012-12-04 | 2013-03-27 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Impurity collecting device for oil sprayer |
| CN103201486A (en) * | 2010-10-21 | 2013-07-10 | 罗伯特·博世有限公司 | Method for operating an internal combustion engine |
| CN103498712A (en) * | 2013-09-21 | 2014-01-08 | 中国北方发动机研究所(天津) | Novel electronically controlled oil dripping pump of diesel engine |
| CN109441647A (en) * | 2018-12-30 | 2019-03-08 | 中国人民解放军陆军军事交通学院镇江校区 | Diesel engine closes the cylinder circulatory system |
| CN109723591A (en) * | 2018-09-04 | 2019-05-07 | 深圳众为智慧技术有限公司 | Fuel injector detection system |
| CN110107438A (en) * | 2019-05-10 | 2019-08-09 | 周甬 | Environmentally friendly fluid driveable engine operating system and its operation method |
| CN115217663A (en) * | 2022-06-23 | 2022-10-21 | 北京理工大学 | Isobaric injection control method for double-valve injection system of diesel engine |
-
2006
- 2006-04-25 CN CN 200620041288 patent/CN2895762Y/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101377180B (en) * | 2007-08-31 | 2011-01-12 | 株式会社电装 | Fuel injection controller for internal combustion engine |
| CN103201486B (en) * | 2010-10-21 | 2016-10-19 | 罗伯特·博世有限公司 | For running the method for internal combustion engine, controller and the internal combustion engine for motor vehicles |
| CN103201486A (en) * | 2010-10-21 | 2013-07-10 | 罗伯特·博世有限公司 | Method for operating an internal combustion engine |
| CN102155313A (en) * | 2011-04-11 | 2011-08-17 | 吉林大学 | Device for distinguishing position of crank shaft in stop of engine |
| CN102287270A (en) * | 2011-06-30 | 2011-12-21 | 徐玉国 | Constant high pressure injection system for diesel fuel |
| CN102989711B (en) * | 2012-12-04 | 2014-12-03 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Impurity collecting device for oil sprayer |
| CN102989711A (en) * | 2012-12-04 | 2013-03-27 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Impurity collecting device for oil sprayer |
| CN103498712A (en) * | 2013-09-21 | 2014-01-08 | 中国北方发动机研究所(天津) | Novel electronically controlled oil dripping pump of diesel engine |
| CN109723591A (en) * | 2018-09-04 | 2019-05-07 | 深圳众为智慧技术有限公司 | Fuel injector detection system |
| CN109723591B (en) * | 2018-09-04 | 2024-02-23 | 深圳众为智慧技术有限公司 | Oil sprayer detection system |
| CN109441647A (en) * | 2018-12-30 | 2019-03-08 | 中国人民解放军陆军军事交通学院镇江校区 | Diesel engine closes the cylinder circulatory system |
| CN110107438A (en) * | 2019-05-10 | 2019-08-09 | 周甬 | Environmentally friendly fluid driveable engine operating system and its operation method |
| CN115217663A (en) * | 2022-06-23 | 2022-10-21 | 北京理工大学 | Isobaric injection control method for double-valve injection system of diesel engine |
| CN115217663B (en) * | 2022-06-23 | 2023-12-29 | 北京理工大学 | Isobaric injection control method of double-valve fuel injection system of diesel engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070502 Termination date: 20110425 |