CN201963412U - Control system for automatically compensating fuel charge of electric spray engine under different loads - Google Patents
Control system for automatically compensating fuel charge of electric spray engine under different loads Download PDFInfo
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- CN201963412U CN201963412U CN2011200852709U CN201120085270U CN201963412U CN 201963412 U CN201963412 U CN 201963412U CN 2011200852709 U CN2011200852709 U CN 2011200852709U CN 201120085270 U CN201120085270 U CN 201120085270U CN 201963412 U CN201963412 U CN 201963412U
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Abstract
The utility model provides a control system for automatically compensating the fuel charge of an electric spray engine under different loads. The control system is characterized by comprising a pressure sensor for acquiring the pressure of an inlet manifold, a rotation speed sensor for acquiring the rotation speed of the engine and a temperature sensor for acquiring the work temperature of the engine, wherein the pressure sensor, the rotation speed sensor and the temperature sensor are respectively connected with an input end of an engine controller, an output end of the engine controller is connected with an input end of a drive control circuit, and the drive control circuit is used for outputting a fuel spray control pulse signal. The control system can be used for providing the effective burning air-fuel ratio control according to different work loads of the engine, so that the engine can run near to the theoretical air-fuel ratio, and the pollutant emission of the engine can be further greatly reduced. Particularly, the control system can be used for furthest controlling the burnt pollutant emission of the engine before an oxygen sensor normally works.
Description
Technical field
The utility model relates to the motor fuel injection control system, especially the control system that fuel injection quantity compensates automatically under the electronic fuel injection engine different load.
Background technique
Along with the increase of global warming and harmful gas emission, increasing automobile, motorcycle energy-conserving and emission-cutting technology have obtained using widely.Motor as automobile, motorcycle emission source, automobile, motorcycle engine are in the process of work, because burns gasoline inevitably can produce noxious emission, its major pollutants are hydrocarbon, oxynitrides (NOx) and carbon monoxide (CO) etc.And according to the engine combustion theory, if can guarantee motor burning under theoretical air fuel ratio condition always (so-called air-fuel ratio is meant the proportions of ingredients of air and gasoline), the effulent of harmful substance just can be controlled effectively so.And then by external purification device (ternary catalyzing unit), then the effulent of car load just can satisfy the Abgasgesetz by country.Therefore realize that the critical path of Exhaust Control of Engine controls the engine combustion air fuel ratio exactly.We are called chemically correct fuel to the ratio of the needed unit of the gasoline perfect combustion air quality amount of unit mass in theory.The size of chemically correct fuel is subjected to that actual petrol molecule forms, and to influence meeting variant, and on Chinese market, the chemically correct fuel of different gasoline is generally between 14.6～14.75.In actual engineering, the air fuel ratio that causes owing to factors such as having gasoline difference influences, in closed loop electronic fuel injection engine control system, all adopt a lambda sensor to come the combustion case of detecting engine, the signal that system passes back according to lambda sensor, through the control of Correction and Control realization theory air fuel ratio, allow motor always operate near the chemically correct fuel.But its temperature of the need of work of lambda sensor reaches a threshold value and could begin.Therefore at lambda sensor not under the condition of proper functioning, the air-fuel ratio control of motor then can not be undertaken by said method.Yet according to the emission regulation demands of state three, automobile and motorcycle emission detect, and are to begin to carry out once starting from vehicle, do not have the process of preheating.Therefore in a few minutes of beginning, system can not carry out the accurate control of air-fuel ratio by lambda sensor.
The model utility content
Technical problem to be solved in the utility model is, at having electronic fuel injection engine begins can not accurately control in a period of time air-fuel ratio after unlatching problem now, provide motor to open electronic fuel injection engine fuel injection quantity control system for automatic compensation under the different load that just can accurately control air-fuel ratio in the back.
In order to solve the problems of the technologies described above, the utility model provides electronic fuel injection engine fuel injection quantity control system for automatic compensation under the different load, it is characterized in that, comprise pressure transducer, the speed probe of gathering engine speed of gathering air-distributor pressure and the temperature transducer of gathering engine operating temperature, described pressure transducer, speed probe and temperature transducer are connected the input end of engine controller respectively, the output terminal of this engine controller connects the input end of Drive and Control Circuit, and this Drive and Control Circuit output connects oil sprayer.
Described engine controller is provided with the engine load computing module, the input end of this engine load computing module respectively with described pressure transducer, the output terminal of speed probe and temperature transducer is connected, this engine load computing module output terminal connects basic air fuel ratio computing module simultaneously, the input end of cold machine air fuel ratio computing module and air fuel ratio load compensation module, basic air fuel ratio computing module, the output terminal of cold machine air fuel ratio computing module and air fuel ratio load compensation module is connected final air fuel ratio computing module, and described final air fuel ratio computing module output connects described oil sprayer.
Good effect of the present utility model is:
1. this control system can be according to motor under the different operating loading condiction, effective air-fuel ratio control is provided, motor is operated near the chemically correct fuel, thereby significantly reduce the pollutant emission of motor, particularly at lambda sensor not before the proper functioning, this device more can be controlled the engine combustion pollutant emission to greatest extent.
2. under the prerequisite of lambda sensor proper functioning, this control system still can control effectively to air fuel ratio, and particularly under the operating mode of varying duty, the air fuel ratio transient changing can effectively be compensated and control, and makes the final control effect of closed loop control better.And the utility model improves the control of engine air-fuel ratio greatly, effectively reduces the pollutant emission of motor.
Description of drawings
Fig. 1 is the utility model circuit block diagram;
Fig. 2 is the engine controller circuit block diagram.
Embodiment
Below in conjunction with specific embodiment the utility model is described in further detail.
As shown in Figure 1, electronic fuel injection engine fuel injection quantity control system for automatic compensation under the different load of the present utility model, comprise the pressure transducer that is used to gather air-distributor pressure, gather the speed probe of engine speed, gather the temperature transducer of engine operating temperature, the three-way sensor output signal is input to engine controller by the signal input circuit module, engine controller carries out computing to the three-way sensor output signal, pulse width by the oil spout of drive control circuit engine fuel injector, thereby significantly reduce the pollutant emission of motor, particularly at lambda sensor not before the proper functioning, this device more can be controlled the engine combustion pollutant emission to greatest extent.
In engine working process, in case motor entry into service, the engine intake manifold pressure transducer just begins the suction pressure in the in good time continuous collection intake manifold, the then in good time continuous collection engine crankshaft rotating speed (being engine speed) of the in good time continuous acquisition engine operating temperature of engine temperature sensing unit, engine rotation speed sensor.After the three-way sensor signal was transferred to engine controller by the signal input circuit module, engine controller can calculate load value in the engine operation process according to air-distributor pressure value, engine temperature and engine speed.Engine load values is an important process characteristic variable of motor, and it can well react the working condition of motor.After engine controller obtained engine load values, by the computational analysis that fuel injection quantity is quantized, the load operation point at different carried out effective compensation of Engine Injection Mass, realized regulating automatically the control air-fuel ratio.Finally spray corresponding fuel oil by the drive control circuit oil sprayer.Thereby effectively control the engine combustion air fuel ratio, reduce the discharge value of corresponding pollutant.
As shown in Figure 2, engine controller is provided with the engine load computing module, this engine load computing module receives pressure transducer, three road signals of speed probe and temperature transducer output, and to three road input signals load calculate after, output load signal and tach signal are to basic air fuel ratio computing module, output load signal and temperature signal are to cold machine air fuel ratio computing module and air fuel ratio load compensation module, basic air fuel ratio computing module, cold machine air fuel ratio computing module, air fuel ratio load compensation module is exported basic air fuel ratio signal respectively, cold machine maintenance positive coefficient, the load compensation coefficient is to final air fuel ratio control module, final air fuel ratio control module calculates final air fuel ratio and is converted into actual fuel injection pulsewidth, realizes effective control of air fuel ratio.
This control system can be according to motor under the different operating loading condiction, effective air-fuel ratio control is provided, motor is operated near the chemically correct fuel, thereby significantly reduce the pollutant emission of motor, particularly at lambda sensor not before the proper functioning, this device more can be controlled the engine combustion pollutant emission to greatest extent.
Under the prerequisite of lambda sensor proper functioning, this control system still can control effectively to air fuel ratio, and particularly under the operating mode of varying duty, the air fuel ratio transient changing can effectively be compensated and control.Make the final control effect of closed loop control better.And the utility model improves the control of engine air-fuel ratio greatly, effectively reduces the pollutant emission of motor.
Wherein, air fuel ratio load compensation module is as module that increases newly in the engine controller, can carry out the difference inquiry according to being stored under its inner different load air fuel ratio control correction card, finally calculate the correction factor of air-fuel ratio under preload.Final air fuel ratio control module is with basic air fuel ratio coefficient and cold machine maintenance positive coefficient and this load compensation multiplication that increases newly, just obtained final total air-fuel ratio coefficient, then through the oil spout conversion, calculate the fuel injection pulsewidth of oil sprayer, finally by Drive and Control Circuit, the control oil sprayer carries out oil spout, realizes regulating automatically.
Following table is the respective value of air fuel ratio control correction card under the different load that specifically adopted:
As can be seen from the above table, under engine temperature the same terms, along with the increase of engine load, system need compensate more fuel injection quantity.And along with the rising of engine temperature, under the same load, the compensation of Engine Injection Mass will reduce, even with compensation.But under the starting stage or cryogenic conditions of emission test, the compensation of this fuel injection quantity is very effective.The fuel injection quantity compensation of having only cold machine air fuel ratio computing module before comparing, he more can covering engine all working temperature range and load range, for the emission control of motor provides more effective solution.
For different vehicles and motor, the load correction factor is inequality, in the engine matching and calibration process, need mate accordingly on engine pedestal and car load rotary drum and demarcate.In the discharging coupling, carry out final optimization and adjustment then.To satisfy the requirement of emission test, reach national corresponding standard and rules.In addition, the load compensation module is as the newly-increased module in the engine controller, and it is increased in the middle of the internal memory of storage, can not increase any hardware cost again, it can also be more effective the stability of raising system emission control.
Simultaneously, on stream, engine pedestal coupling and car load rotary drum coupling and discharging coupling all are the normal process in the electronic fuel injection engine development process.Therefore, also do not have more additional development process cost and be increased in the development process of reality, practicability is very strong.
The foregoing description of the present utility model only is to be explanation the utility model example, and is not to be qualification to mode of execution of the present utility model.For those of ordinary skill in the field, can also make other multi-form variation and changes on the basis of the above description.Here can't give exhaustive to all mode of executions.Everyly belong to the row that conspicuous variation that the technical solution of the utility model amplifies out or change still are in protection domain of the present utility model.
Claims (2)
1. electronic fuel injection engine fuel injection quantity control system for automatic compensation under the different load, it is characterized in that, comprise pressure transducer, the speed probe of gathering engine speed of gathering air-distributor pressure and the temperature transducer of gathering engine operating temperature, described pressure transducer, speed probe and temperature transducer are connected the input end of engine controller respectively, the output terminal of this engine controller connects the input end of Drive and Control Circuit, and this Drive and Control Circuit output connects oil sprayer.
2. electronic fuel injection engine fuel injection quantity control system for automatic compensation under the different load according to claim 1, it is characterized in that, described engine controller is provided with the engine load computing module, the input end of this engine load computing module respectively with described pressure transducer, the output terminal of speed probe and temperature transducer is connected, this engine load computing module output terminal connects basic air fuel ratio computing module simultaneously, the input end of cold machine air fuel ratio computing module and air fuel ratio load compensation module, basic air fuel ratio computing module, the output terminal of cold machine air fuel ratio computing module and air fuel ratio load compensation module is connected final air fuel ratio computing module, and described final air fuel ratio computing module output connects described oil sprayer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200852709U CN201963412U (en) | 2011-03-28 | 2011-03-28 | Control system for automatically compensating fuel charge of electric spray engine under different loads |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200852709U CN201963412U (en) | 2011-03-28 | 2011-03-28 | Control system for automatically compensating fuel charge of electric spray engine under different loads |
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| Publication Number | Publication Date |
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| CN201963412U true CN201963412U (en) | 2011-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200852709U Expired - Lifetime CN201963412U (en) | 2011-03-28 | 2011-03-28 | Control system for automatically compensating fuel charge of electric spray engine under different loads |
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| CN (1) | CN201963412U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104533644A (en) * | 2014-12-20 | 2015-04-22 | 河南机电高等专科学校 | Fuel oil controller |
-
2011
- 2011-03-28 CN CN2011200852709U patent/CN201963412U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104533644A (en) * | 2014-12-20 | 2015-04-22 | 河南机电高等专科学校 | Fuel oil controller |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: Northern New Chongqing 401122 ring Yunzao Road No. 3 Patentee after: United Automotive Electronics (Chongqing) Co., Ltd. Address before: 401122 Chongqing City, Yubei District economic development zone was opened Yunzao Road No. 3 Patentee before: CHONGQING CHANGAN VISTEON ENGINE CONTROL SYSTEMS CO., LTD. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110907 |