CN100422539C - Electric controlled fuel oil injection four stroke gasoline engine - Google Patents
Electric controlled fuel oil injection four stroke gasoline engine Download PDFInfo
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- CN100422539C CN100422539C CNB021461112A CN02146111A CN100422539C CN 100422539 C CN100422539 C CN 100422539C CN B021461112 A CNB021461112 A CN B021461112A CN 02146111 A CN02146111 A CN 02146111A CN 100422539 C CN100422539 C CN 100422539C
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- engine
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- fuel injection
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Abstract
The present invention relates to an electric control fuel jet petrol engine which comprises an engine body (31), an air intake system (30), an impulse type electric fuel injector (5), a fuel feed pipeline (8), an oil return pipeline (9), an exhaust system (32), an electronic control unit ECU (11), an ignition device (33), a rotation speed and corner mark sensor (12) and a throttle position sensor (13). The present invention is characterized in that a thermal shield (1) is arranged in the air intake system (30); the fuel injector (5) is arranged in a position on the thermal shield (1) or in the front of the thermal shield (1); the fuel feed pipeline (8) and the oil return pipeline (9) are both non-pressure or low-pressure pipelines; ECU (11) directly drives the fuel injector (5) to inject fuel into the air intake system (30) of the engine at definite time and in nemberical quantities.
Description
Technical field
The present invention relates to the electronic fuel injection four-stroke gasoline engine.
Background technique
The electronic fuel injection motor is owing to can accurately control air fuel ratio, so its harmful exhaust discharge amount can be effectively controlled, engine performance can be further enhanced simultaneously, and also the application for the exhaust fume catalytic treatment device provides assurance.Yet the electronic fuel injection engine oil supply system is complicated more a lot of than Carburetor, the cost height, and the therefore application of having relatively high expectations in some cost control, motorcycle for example, electric injection system is difficult to obtain to popularize.
In existing electronic fuel injection four-stroke gasoline engine, oil-fired system is made up of a pressure oil pump, one or more electronic fuel injection valve, oil pressure regulator, an ECU (Electrical Control Unit) (ECU) and several sensors at least, and oil pump separates with injection valve, oil pump is in the fuel tank or in the middle of the fuel pipe, and injection valve is in the engine aspirating system, and fuel oil is sprayed to closure (single-point discharge) or suction port (multi-point injection).This electric injection system is if be used for the cylinder number motor of twin-tub or single cylinder for example less, and then because the oil pump cost is higher, the complete machine cost just is difficult to be accepted by the user.
By Chinese patent application 96194815.9 and known another fuel injection apparatus of 01103954.x, this is with oil pump and injection valve unites two into one and directly drive the device that carries out the pulsed oil spout by ECU, and this device is joined a low pressure oil supply recycle pump again and is best suited for two-stroke Incylinder direct injection petrol engine.
Summary of the invention
The objective of the invention is to utilize the oil sprayer of electronic pulsed oil spout to constitute the outer fuel injection four-stroke gasoline engine of more simple automatically controlled cylinder, to reduce EFI petrolic cost, especially single cylinder or the petrolic cost of twin-tub EFI.
This purpose reaches by following structure, that is: utilize electronic pulsed oil sprayer to give engine oil, ECU directly drives oil sprayer, the fuel supply line and the return tube that connect oil sprayer are nothing pressure or utmost point low pressure line, for example being directly connected to the position is not less than on the fuel tank of oil sprayer, especially be provided with a heat-proof device in gas handling system, the electric fuel oil sparger is installed on the heat-proof device or a certain before position.
Further improvement or the distortion favourable to the present invention comprise following characteristics.
Thermal-protective material in the described heat-proof device can be pottery, heatpiston or heat insulating elastic rubber etc.Utilize elastic caoutchouc to also help and reduce the influence of engine vibration oil sprayer work as thermal-protective material.
Described heat-proof device can be in before the throttle body, and described fuel injector is installed on the suction tude of described heat-proof device leading portion, and fuel oil is sprayed to closure, thereby constitutes the single-point discharge system.
Described heat-proof device also can be connected with cylinder head, described fuel injector is installed on the suction tude of section before the described heat-proof device, or be positioned at before the described heat-proof device and on the suction tude that sets up separately, and fuel oil sprayed to the suction port of engine cylinder cover intake duct, thereby constitute multipoint injection system.
The present invention's electronic fuel injection petrol engine, ECU can be according to tach signal and the throttle opening signal of throttle position sensor and the size that variance ratio calculates basic fuel injection pulse thereof of engine rotation speed sensor.Can install and measure the temperature transducer of engine temperature or coolant temperature on engine cylinder cap or cylinder block, in the pre-installed intake air temperature sensor of air inlet shutter body, described ECU determines suitable fuel injection quantity correction according to the signal of described temperature transducer.
The present invention's electronic fuel injection petrol engine, also can on outlet pipe or discharge manifold, lambda sensor be installed, described ECU carries out feedback modifiers according to the signal of described lambda sensor to fuel injection quantity, and the air fuel ratio that enters the mixed gas of motor with control is near the theoretical equivalent proportion all the time.
The present invention's electronic fuel injection petrol engine, spark coil can be by described ECU control, and ECU can determine ignition advance angle by the signal of described engine rotation speed sensor and the signal of described throttle position sensor.
Description of drawings
Describe the present invention in detail by means of accompanying drawing in the following embodiments, wherein:
Fig. 1 is illustrated in and uses the embodiment 1 that this invention constitutes the tuned port injection system in single cylinder or multi-cylinder (the comprising twin-tub) motor.
Fig. 2 is illustrated in and uses the embodiment 2 that this invention constitutes the single-point discharge system in the multicylinder engine.
Fig. 3 and Fig. 4 represent to do with heat-resisting elastic caoutchouc or heat resistant plastice two kinds of designs of the heat-proof device of thermal-protective material.
Embodiment
In embodiment 1, gas handling system 30 by electronic fuel injection four-stroke gasoline engine of the present invention comprises heat-proof device 1, suction tude (multi-cylinder engine is inlet manifold) 2, closure 3, throttle body 4 etc., electronic oil sprayer 5 is installed on the suction tude (inlet manifold) 2 that links to each other with heat-proof device, and the direction of oil sprayer oil spout is the intake duct suction port 7 on the cylinder head 6.Oil sprayer links to each other with fuel tank 10 with return tube 9 by oil inlet pipe 8, and the position of fuel tank 10 should be not less than the filler opening of oil sprayer, is full of fuel oil all the time to guarantee oil sprayer filler opening place.If fuel tank has to be arranged in the position that is lower than oil sprayer, then should add a fuel circulating pump (for example the diaphragm pump that the automobile carburetor motor is commonly used etc.) and guarantee that the oil sprayer filler opening is full of fuel oil at work all the time.
Also comprise engine body 31 in this motor, vent systems 32, drive the ECU (Electrical Control Unit) (ECU) 11 of oil sprayer work, measure the rotating speed and the CKP 12 of engine speed and crank position and measure the throttle position sensor 13 of throttle opening size, the software that signal processing hardware such as one-chip computer and storage is arranged in the ECU (Electrical Control Unit) and calculate.
In order to control the engine fuel injection amount more accurately, on engine cylinder cap 6 or cylinder block 17, also can install engine temperature sensing unit 14, directly measure the temperature of cylinder head 6 or cylinder block 17 for air cooling engine, and for water-cooled or oil cooling motor, sensor 14 will extend into the temperature of measuring cooling liquid in cooling water channel on cylinder head 6 or the cylinder block 17 or the cooling oil duct.Before closure 3, also intake air temperature sensor 15 can be installed.
Lambda sensor 16 is installed on outlet pipe (multi-cylinder engine also be can be discharge manifold) 18 or air outlet flue 19 can be monitored the air fuel ratio the state whether inflammable mixture that enters motor is in theoretical equivalent proportion constantly, thereby realize feedback control engine air-fuel ratio.Because ECU11 can know the state of motor definitely, so among the ECU11 IGNITION CONTROL and drive circuit can be set, the low voltage terminal of drive ignition coil 20 is lighted a fire, and the ignition advance angle of motor can obtain optimization control like this.
In embodiment 2, compare with embodiment 1, all need a plurality of oil sprayers of one to replace in every cylinder in the multi-cylinder engine (comprising the twin-tub machine), constitute the single-point discharge system, thereby the cost of electronic fuel injection multi-cylinder engine is reduced with being installed on throttle body 4 oil sprayer 5 before.In this embodiment, heat-proof device 1 is placed in before the throttle body, and electronic oil sprayer 5 is installed on the suction tude 2 ' of portion before the heat-proof device 1, and oil sprayer 5 sprays to closure 3 with fuel oil.Throttle body 4 and intake manifold 2 are subjected to the influence of the heat that engine cylinder cover transmits like this, can be in the state than higher temperatures, and this helps spraying the evaporation of fuel oil, thereby helps the uniformity of each cylinder air fuel ratio.But these heats seldom can be delivered to oil sprayer 5 and get on owing to be subjected to stopping of heat-proof device 1, thereby have got rid of the possibility of oil sprayer 5 because of the too high generation bubble of temperature abnormal work.
Heat-proof device 1 of the present invention can be designed to structure as shown in Figure 3, it is made up of two metal flanges 21,22 and heat insulation rubber or heat resistant plastice 23, flange adds the mold insert in man-hour and rubber or plastics as rubber or plastic pressing forming and combines closely, rubber or plastics link together two flanges, but can effectively stop heat to conduct to another flange from a flange.
Heat-proof device 1 of the present invention also can be designed to structure as shown in Figure 4, and it is located at the mounting point 24 of oil sprayer 5 on its anterior metal suction tude 2 ', and back end interface still is a flange 22, but the suction port of front end is a pipe interface 25.
The working method of the present invention's electronic fuel injection petrol engine is described by means of the embodiment of the invention 1 below.
After the ECU11 energising, at first can control oil sprayer 5 and spray in advance several times that fuel oil is beneficial to engine start, after bent axle rotated, every circulation or every circle all sprayed oil 1 time, and rotating speed, throttle position, intake temperature, engine temperature and the starting state etc. of the size of fuel injection quantity thus the time are determined.ECU11 also control ignition system 33 lights a fire in suitable phase place.Behind the hot car of engine start, ECU11 controls fuel injection quantity and ignition advance angle by oil spout of storing in the storage and igniting MAP chart basically, and this oil spout and igniting MAP are the two-dimensional functions of throttle position and rotating speed.If throttle position suddenlys change (impact speed or anticlimax speed) then will carry out the variable working condition correction to fuel injection quantity by the rate of change of throttle position.After lambda sensor 16 proper functioning, under steady working condition, ECU will carry out feedback modifiers to fuel injection quantity according to the air fuel ratio state that lambda sensor 16 is measured, if lambda sensor 16 is measured air fuel ratio and is crossed rare then increase fuel injection quantity, if lambda sensor 16 is measured the air fuel ratio overrich, then reduce fuel injection quantity, so constantly circulation.Oil sprayer 5 can produce certain dump pump oil mass when spraying that once oil resets, this pump oil mass is returned fuel tank by return tube 9.The existence of recirculating oil quantity has further reduced the temperature of oil sprayer 5, the bubble that generates in the oil sprayer 5 can also be taken back fuel tank 10 simultaneously and discharge separation.Because the heat-proof device 1 that adopts in this system, the heat that engine thermal car back cylinder cover 6 distributes is difficult for passing to oil sprayer 5, so although oil sprayer 5 intermediate fuel oils are in very low pressure, fuel oil still can not produce too much vapor bubbles so that have influence on the proper functioning of oil sprayer 5.
Claims (9)
1. electronic fuel injection petrol engine, it comprises engine body (31), gas handling system (30), pulsed electric fuel oil sparger (5), fuel supply pipe (8) and return line (9), vent systems (32), electronic control unit ECU (11), ignition mechanism (33), rotating speed and footmark sensor (12), throttle position sensor (13), it is characterized by: be provided with a heat-proof device (1) in the gas handling system (30), the pulsed electronic fuel oil jetter of fuel injector (5) for oil pump and injection valve are united two into one, be installed on the heat-proof device (1) or a certain before position, fuel supply pipe (8) and return line (9) are not have and press or utmost point low pressure line, ECU (11) directly drives fuel injector (5) fuel timing is sprayed in the engine aspirating system (30) quantitatively, thermal-protective material (23) in the described heat-proof device (1) is elastic caoutchouc or heat resistant plastice, there is metal adpting flange (21 at its two ends, 22) or suction tude (2 '), this adpting flange (21,22) and suction tude (2 ') be an integral body as mold insert and thermal-protective material (23) compression moulding.
2. according to the described electronic fuel injection petrol engine of claim 1, it is characterized by: heat-proof device (1) is in throttle body (4) before, fuel injector (5) is installed on heat-proof device (1) before on the suction tude (2 ') of portion, and fuel oil is sprayed to closure (3).
3. according to the described electronic fuel injection petrol engine of claim 1, it is characterized by: heat-proof device (1) is connected with cylinder head (6), fuel injector (5) is installed in heat-proof device (1) before on the suction tude (2 ') of portion, and fuel oil is sprayed to the suction port (7) of engine cylinder cover intake duct.
4. according to the described electronic fuel injection petrol engine of claim 1, it is characterized by: heat-proof device (1) is connected with cylinder head (6), between throttle body (4) and heat-proof device (1), set up a suction tude (2) separately, fuel injector (5) is installed on this suction tude (2), and fuel oil is sprayed to the suction port (7) of engine cylinder cover intake duct by heat-proof device (1).
5. according to the arbitrary described electronic fuel injection petrol engine of claim 1 ~ 4, it is characterized by: ECU (11) is according to tach signal and the throttle opening signal of throttle position sensor (13) and the size that variance ratio calculates basic fuel injection pulse thereof of engine rotation speed sensor (12).
6. according to the described electronic fuel injection petrol engine of claim 5, it is characterized by: on engine cylinder cap (6) or cylinder block (17), engine temperature sensing unit (14) is installed, temperature transducer (14) is positioned on cylinder head (6) or the cylinder block (17), what measure is the temperature of cylinder head (6) or cylinder block (17), or for water-cooled or oil cooling motor, temperature transducer (14) extend in the cooling water channel or cooling oil duct on cylinder head (6) or the cylinder block (17), measure the temperature of cooling liquid, and ECU (11) determines suitable fuel injection quantity correction according to the signal of engine temperature sensing unit (14).
7. according to the described electronic fuel injection petrol engine of claim 6, it is characterized by: on outlet pipe or discharge manifold (18), lambda sensor (16) is installed, ECU (11) carries out feedback modifiers according to the signal of lambda sensor (16) to fuel injection quantity, and the air fuel ratio that enters the mixed gas of motor with control is near the theoretical equivalent proportion all the time.
8. according to the described electronic fuel injection petrol engine of claim 7, it is characterized by: spark coil (20) low voltage terminal in the ignition mechanism (33) is by ECU (11) control, and ECU (11) determines ignition advance angle by the signal of engine rotation speed sensor (12) and the signal of throttle position sensor (13).
9. according to the described electronic fuel injection petrol engine of claim 8, it is characterized by: in the preceding intake air temperature sensor (15) that is equipped with of air inlet shutter body (4), ECU (11) revises basic fuel injection amount by its signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021461112A CN100422539C (en) | 2002-10-31 | 2002-10-31 | Electric controlled fuel oil injection four stroke gasoline engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021461112A CN100422539C (en) | 2002-10-31 | 2002-10-31 | Electric controlled fuel oil injection four stroke gasoline engine |
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| Publication Number | Publication Date |
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| CN1493779A CN1493779A (en) | 2004-05-05 |
| CN100422539C true CN100422539C (en) | 2008-10-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB021461112A Expired - Fee Related CN100422539C (en) | 2002-10-31 | 2002-10-31 | Electric controlled fuel oil injection four stroke gasoline engine |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101363381B (en) * | 2008-09-24 | 2010-06-02 | 张和君 | Electric-controlled work system for motorboat with petrol engine |
| CN102242678B (en) * | 2011-07-01 | 2014-06-18 | 山东理工大学 | Electronic fuel injection control system of small gasoline engine |
| CN102767430B (en) * | 2012-05-04 | 2016-04-27 | 浙江福爱电子有限公司 | A kind of generator set and progress control method thereof |
| CN102661207B (en) * | 2012-05-31 | 2014-07-23 | 姜国清 | Oil injection control system, oil injection control method and engine |
| CN105041536B (en) * | 2015-09-02 | 2017-10-20 | 东莞传动电喷科技有限公司 | Electronic fuel injection throttle body |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4452210A (en) * | 1981-09-21 | 1984-06-05 | Hitachi, Ltd. | Fuel injection valve drive circuit |
| US4492201A (en) * | 1982-05-17 | 1985-01-08 | Alfa Romeo Auto S.P.A. | Petrol injector protection sheath |
| CN1043190A (en) * | 1988-11-30 | 1990-06-20 | 根泰克B·V | The device of injecting LPG in liquefied condition |
| CN2103009U (en) * | 1991-09-29 | 1992-04-29 | 北京内燃机总厂 | Electronic controlled spurting and high-energy ignition petrol engine |
| JPH08270524A (en) * | 1995-03-31 | 1996-10-15 | Toyoda Gosei Co Ltd | Fuel delivery pipe |
| CN1145655A (en) * | 1995-02-02 | 1997-03-19 | 罗伯特·博施有限公司 | Fuel injection valve for I.C. Engine |
| CN2282603Y (en) * | 1996-10-08 | 1998-05-27 | 北内集团总公司 | Electro-single firing fuel oil jetting and direct firing petrol engine for vehicle |
| US6196195B1 (en) * | 1997-09-30 | 2001-03-06 | Robert Bosch Gmbh | Thermal insulating sleeve |
-
2002
- 2002-10-31 CN CNB021461112A patent/CN100422539C/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4452210A (en) * | 1981-09-21 | 1984-06-05 | Hitachi, Ltd. | Fuel injection valve drive circuit |
| US4492201A (en) * | 1982-05-17 | 1985-01-08 | Alfa Romeo Auto S.P.A. | Petrol injector protection sheath |
| CN1043190A (en) * | 1988-11-30 | 1990-06-20 | 根泰克B·V | The device of injecting LPG in liquefied condition |
| CN2103009U (en) * | 1991-09-29 | 1992-04-29 | 北京内燃机总厂 | Electronic controlled spurting and high-energy ignition petrol engine |
| CN1145655A (en) * | 1995-02-02 | 1997-03-19 | 罗伯特·博施有限公司 | Fuel injection valve for I.C. Engine |
| JPH08270524A (en) * | 1995-03-31 | 1996-10-15 | Toyoda Gosei Co Ltd | Fuel delivery pipe |
| CN2282603Y (en) * | 1996-10-08 | 1998-05-27 | 北内集团总公司 | Electro-single firing fuel oil jetting and direct firing petrol engine for vehicle |
| US6196195B1 (en) * | 1997-09-30 | 2001-03-06 | Robert Bosch Gmbh | Thermal insulating sleeve |
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| Publication number | Publication date |
|---|---|
| CN1493779A (en) | 2004-05-05 |
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Owner name: ZHEJIANG FEIYA ELECTRONICS CO., LTD. Free format text: FORMER OWNER: TIANJIN INST. OF IC ENGINE Effective date: 20041015 |
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Granted publication date: 20081001 Termination date: 20121031 |