CN101598091B - Stabilized voltage fuel injection system - Google Patents
Stabilized voltage fuel injection system Download PDFInfo
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- CN101598091B CN101598091B CN2009103041619A CN200910304161A CN101598091B CN 101598091 B CN101598091 B CN 101598091B CN 2009103041619 A CN2009103041619 A CN 2009103041619A CN 200910304161 A CN200910304161 A CN 200910304161A CN 101598091 B CN101598091 B CN 101598091B
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Abstract
The invention discloses a stabilized voltage fuel injection system, which mainly comprises a high-pressure oil pump, a pressure accumulator, a fuel injector, a flow sensor, a servomotor, a motor driving module and an electric control unit. An input end of the electric control unit is connected with the flow sensor and is used for processing a signal of the flow sensor and then comparing the processed signal with a flow setting value taken as the reference quantity for feedback control; and if the difference between the processed signal and the flow setting value exceeds the preset control quantity, the electric control unit sends an adjustment control instruction, and the deviation amount of fuel flow of the oil injector is controlled within the preset range by adjusting the rotating speed of the servomotor by the motor driving module. The stabilized voltage fuel injection system has the characteristics of accurate and convenient control of fuel flow, high response speed and the like.
Description
Technical field
The invention belongs to technical field of engines, particularly a kind of stabilized voltage fuel injection system of motor.
Background technique
Stirling engine is a kind of closed cycle reciprocating piston type heat engine of external combustion, is different from the internal-combustion engine that relies on fuel to gain impetus in the engine interior burning.The Stirling engine using gases is as working medium; Continuous burning in the firing chamber of fuel outside cylinder is passed to working medium through heater, and working medium is not participated in burning directly; Do not change yet; Heater makes that when gases are heated, they expand, meet cold compression and produce the powered piston motion, and expanding gas cools off at cold air chamber, carries out such cyclic process times without number.Because external-combustion engine has been avoided the quick-fried acting problem of shake of traditional combustion engine, thereby high efficiency, low noise, the low pollution and low operating cost have been realized.The external-combustion engine various inflammable gass that can burn, like rock gas, biogas, petroleum gas, hydrogen, coal gas etc., also liquid fuels such as incendivity diesel oil, LPG can also burn wood, and utilizes solar energy etc.As long as hot chamber reaches 700 ℃, the equipment operation of can doing work, ambient temperature is low more, and the acting ability is strong more.The external-combustion engine biggest advantage is to exert oneself and efficient is not influenced by altitude, is very suitable for the high altitude localities and uses.But Stirling engine also has many problems to solve, and for example manufacture cost is higher, and the working medium sealing technique is difficult, and the reliability and the life-span of Sealing also have problems, and the power adjustments control system is complicated, and machine is comparatively heavy.
In the Stirling engine of liquid fuels such as burning diesel oil, change the Operational Limits of Stirling engine, all can change the output power of Stirling engine like the circulating pressure of working medium or fuel flow etc.The method of existing change fuel flow mainly contains two kinds:
1) high pressure oil pump provides the fuel oil of firm discharge to accumulator with fixed rotating speed; One relief valve that is communicated with fuel tank is housed in the accumulator; Will unnecessary fuel oil overflow through the aperture of control relief valve and to flow back to fuel tank and control the fuel pressure in the accumulator, its shortcoming mainly is: the fuel delivery of oil pump is constant, but at the pressure of accumulator during above setting value; The part high pressure fuel can be let out away through relief valve, the energy of waste oil pump;
2) high pressure oil pump is with a certain fixed rotating speed fuel feeding in accumulator; Its setting value through control system is regulated the displacement of pump rack in the oil-flow control apparatus to control the oil mass that oil pump pumps into accumulator; But its shortcoming is: the adjustment precision of tooth bar is not enough; Be difficult to the amount that accurately control gets into fuel oil in the accumulator, cause the interior fuel pressure fluctuation of accumulator excessive, the output power of motor is unstable.
Summary of the invention
The objective of the invention is the deficiency to existing technology, provide a kind of through controlling the stabilized voltage fuel injection system that the high pressure oil pump rotating speed changes the fuel feed amount, this fuel injection system has characteristics such as fuel-flow control is convenient, accurate, speed of response is fast.
Technological scheme of the present invention is: a kind of stabilized voltage fuel injection system, comprise the high pressure oil pump, accumulator and the oil sprayer that are serially connected in the oil circuit, and this system also comprises:
One flow transducer, it is serially connected in the fuel flow that is used to measure oil sprayer in accumulator and the oil circuit that oil sprayer is connected;
One actuating motor, itself and high pressure oil pump are in transmission connection to drive high pressure oil pump work;
One motor drive module, it is through the rotating speed of a servo driver with the control actuating motor;
One ECU, its input end connection traffic sensor is in order to obtain the flux signal of flow transducer, and its output terminal connects motor drive module in order to the output motor control command; Said ECU is handled flux signal the back and is compared with the flow setting value with reference to amount as feedback control; If both differ when surpassing the controlled quentity controlled variable of setting; Then ECU sends the adjustment control command; Through motor drive module adjustment actuating motor rotating speed, the departure of the fuel flow of oil sprayer is limited in the scope of setting.
Also be connected with motor speed control turn-knob on the said ECU; This rotating speed control handle makes the fuel injection quantity of high pressure oil pump adjustable continuously to the flow setting value that ECU provides the flux signal of the conduct of a motor speed setting signal and flow transducer to compare.
The fuel feeding modulating valve is installed on the said high pressure oil pump, and this fuel feeding modulating valve gets into the low pressure oil mass in this oil pump through this high pressure oil pump of ECU control when starting.
On the said accumulator pressure transmitter is installed, this pressure transmitter is connected pressure and the pressure surge situation with fuel oil in the monitoring accumulator with ECU, as a parameter judging system health.
Mesohigh oil pump of the present invention passes through driven by servomotor; Adopt flow transducer to detect the actual fuel injection amount of oil sprayer; Rotating speed through ECU control actuating motor is controlled at the flowed fluctuation of fuel oil in certain scope; The flow control of fuel oil is accurate, convenient, speed of response is fast, makes the output power control of Stirling engine very stable; The fuel feeding modulating valve of installing on the high pressure oil pump can be when system start-up; Regulating driver module through fuel feeding opens earlier under the control of ECU low level signal; Bypass path in the valve is communicated with the oil circuit bypass to reduce resistance of start square; Guarantee that high pressure oil pump starts smoothly, after high pressure oil pump is stabilized in working speed, regulates driver module through fuel feeding and under the control of ECU high level signal, operating current is provided to the fuel feeding modulating valve; Bypass path blockade in the valve and the oil circuit that leads to the fuel feed pump plunger active chamber is opened, pump oil begins to the accumulator fuel feeding.
Description of drawings
Fig. 1 is the block diagram of fuel injection control systems of the present invention.
Embodiment
With the Stirling engine is example; As shown in Figure 1; Be illustrated as the stabilized voltage fuel injection system that is installed in the Stirling engine; This stabilized voltage fuel injection control system mainly comprises and is serially connected in one in the oil line pipe in order to the high pressure oil pump 1 of the fuel oil of low pressure oil circuit D pressurization so that high pressure fuel to be provided, and this high pressure oil pump 1 drives through an actuating motor 5, and one is connected with high pressure oil pump 1 in order to store the accumulator 2 of the fuel oil that high pressure oil pump pumps; And be connected in the output circuit of accumulator 2 in order to the oil sprayer 3 of the high pressure fuel injection in the accumulator 2 to the R of Stirling engine firing chamber; This oil sprayer 3 is an open fuel injector, in accumulator 2 and oil circuit that oil sprayer 3 is connected, be serially connected with one be used to measure the fuel flow of oil sprayer flow transducer 4, the signal sensed from flux of this flow transducer 4 is connected on the ECU 10.The input end connection traffic sensor 4 of this ECU 10 is in order to compare the flow setting value of measuring with the reference as feedback control usefulness after the signal processing of flow transducer 4; Under the prerequisite that the plunger working chamber volume remains unchanged and input pressure is constant of high pressure oil pump 1; Rotating speed increases; Then the unit time increases to the fuel oil that accumulator supplied, and fuel pressure raises in the accumulator, and fuel injection quantity increases; Rotating speed reduces, and then the unit time reduces to the fuel oil that accumulator supplied, and fuel pressure reduces in the accumulator, and fuel injection quantity reduces; When the oil mass that flows into accumulator equated with the oil mass that flows out accumulator, it is stable that the pressure in the accumulator keeps.If when both differed the controlled quentity controlled variable of surpass setting, then ECU 10 sent the adjustment control command, adjust actuating motor 5 rotating speeds through the servo driver 6 of motor drive module 11 control actuating motors 5, the departure of flow is limited in the scope of setting.
On ECU 10, also be connected with motor speed control turn-knob 8, this motor speed control turn-knob 8 provides a motor speed setting signal to ECU 10, so that make the working speed of high pressure oil pump adjustable continuously.
A fuel feeding modulating valve 13 also is installed on high pressure oil pump 1, and this fuel feeding modulating valve 13 can be controlled high pressure oil pump 1 and when starting, get into the low pressure oil mass in this oil pump.Fuel feeding is regulated driver module 12 when receiving the low level signal of ECU 10; Fuel feeding modulating valve 13 is not because of having electric current through being in normally open; Low pressure oil in the high pressure oil pump 1 all flows away and not to plunger active chamber fuel feeding through fuel feeding modulating valve 13 bypass; High pressure oil pump 1 idle running this moment and not to the accumulator fuel feeding, thus make the required driving moment of high pressure oil pump 1 minimum.Therefore when system start-up, do not give the fuel feeding modulating valve 13 energisings earlier,, guarantee that high pressure oil pump 1 starts smoothly to reduce resistance of start square.After high pressure oil pump 1 is stabilized in working speed; Fuel feeding is regulated driver module 12 and under the control of ECU 10 high level signals, to fuel feeding modulating valve 13 operating current is provided; Bypass path blockade in the valve and the oil circuit that leads to high pressure oil pump 1 plunger active chamber is opened, pump oil begins to the accumulator fuel feeding.
The present invention is not limited to the foregoing description, and this stabilized voltage fuel injection system not only can be applied in the Stirling engine, can also be applied in all motors that use open fuel injector.
Claims (3)
1. a stabilized voltage fuel injection system comprises the high pressure oil pump, accumulator and the oil sprayer that are serially connected in the oil circuit, it is characterized in that this system also comprises:
One flow transducer, it is serially connected in the fuel flow that is used to measure oil sprayer in accumulator and the oil circuit that oil sprayer is connected;
One actuating motor, itself and high pressure oil pump are in transmission connection to drive high pressure oil pump work;
One motor drive module, it is through the rotating speed of a servo driver with the control actuating motor;
One ECU, its input end connection traffic sensor is in order to obtain the flux signal of flow transducer, and its output terminal connects motor drive module in order to the output motor control command; Said ECU is handled flux signal the back and is compared with the flow setting value with reference to amount as feedback control; If both differ when surpassing the controlled quentity controlled variable of setting; Then ECU sends the adjustment control command; Through motor drive module adjustment actuating motor rotating speed, the departure of the fuel flow of oil sprayer is limited in the scope of setting;
One pressure transmitter, this pressure transmitter are installed on the accumulator and are connected to monitor the pressure and the pressure surge situation of fuel oil in the accumulator, as a parameter judging system health with ECU.
2. stabilized voltage fuel injection system according to claim 1; It is characterized in that; Also be connected with motor speed control turn-knob on the said ECU; This rotating speed control handle makes the fuel injection quantity of high pressure oil pump adjustable continuously to the flow setting value that ECU provides the flux signal of the conduct of a motor speed setting signal and flow transducer to compare.
3. stabilized voltage fuel injection system according to claim 1 is characterized in that, the fuel feeding modulating valve is installed on the said high pressure oil pump, and this fuel feeding modulating valve gets into the low pressure oil mass in this oil pump through this high pressure oil pump of ECU control when starting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009103041619A CN101598091B (en) | 2009-07-09 | 2009-07-09 | Stabilized voltage fuel injection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009103041619A CN101598091B (en) | 2009-07-09 | 2009-07-09 | Stabilized voltage fuel injection system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101598091A CN101598091A (en) | 2009-12-09 |
| CN101598091B true CN101598091B (en) | 2012-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009103041619A Expired - Fee Related CN101598091B (en) | 2009-07-09 | 2009-07-09 | Stabilized voltage fuel injection system |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102278215A (en) * | 2011-05-26 | 2011-12-14 | 周秀芬 | Electric-control double-fuel engine system |
| CN104295425B (en) * | 2014-06-05 | 2017-04-12 | 河南科技大学 | Oil injection law measuring system and method |
| CN104214027A (en) * | 2014-07-30 | 2014-12-17 | 河南科技大学 | Common rail pressure stabilization multi-passage controllable fuel injection system |
| CN104214028A (en) * | 2014-07-30 | 2014-12-17 | 河南科技大学 | Single-pump dual-rail fuel oil supply system |
| CN104295350B (en) * | 2014-09-29 | 2017-02-01 | 日立汽车系统(苏州）有限公司 | Engine system and control method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0735268B1 (en) * | 1995-03-28 | 2002-11-27 | Robert Bosch Gmbh | A device for regulating the supply of pressurised fuel to a pressurised fuel accumulator, for example for motor vehicles |
| US6581574B1 (en) * | 2002-03-27 | 2003-06-24 | Visteon Global Technologies, Inc. | Method for controlling fuel rail pressure |
| CN1601077A (en) * | 2003-09-22 | 2005-03-30 | 五十铃自动车株式会社 | Diesel engine |
| CN201428539Y (en) * | 2009-07-09 | 2010-03-24 | 河南科技大学 | Fuel injection system and Stirling engine with same |
-
2009
- 2009-07-09 CN CN2009103041619A patent/CN101598091B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0735268B1 (en) * | 1995-03-28 | 2002-11-27 | Robert Bosch Gmbh | A device for regulating the supply of pressurised fuel to a pressurised fuel accumulator, for example for motor vehicles |
| US6581574B1 (en) * | 2002-03-27 | 2003-06-24 | Visteon Global Technologies, Inc. | Method for controlling fuel rail pressure |
| CN1601077A (en) * | 2003-09-22 | 2005-03-30 | 五十铃自动车株式会社 | Diesel engine |
| CN201428539Y (en) * | 2009-07-09 | 2010-03-24 | 河南科技大学 | Fuel injection system and Stirling engine with same |
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| CN101598091A (en) | 2009-12-09 |
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