CN103628989A - Automotive CNG and gasoline double-fuel supply system based on simultaneous control by single ECU - Google Patents
Automotive CNG and gasoline double-fuel supply system based on simultaneous control by single ECU Download PDFInfo
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- CN103628989A CN103628989A CN201310617995.1A CN201310617995A CN103628989A CN 103628989 A CN103628989 A CN 103628989A CN 201310617995 A CN201310617995 A CN 201310617995A CN 103628989 A CN103628989 A CN 103628989A
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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
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- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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Abstract
The invention discloses an automotive CNG and gasoline double-fuel supply system based on simultaneous control by a single ECU, and relates to automotive fuel supply systems. According to the automotive CNG and gasoline double-fuel supply system based on simultaneous control by the single ECU, a gasoline fuel tank (1), a gasoline pump (2), a gasoline pressure regulator (3), a fuel filter (4), a fuel rail assembly (5) and an engine (6) are sequentially connected to form a gasoline fuel supply unit; a gas cylinder (11), a fuel gas filter (10), a high pressure solenoid valve (9), a pressure reducer (8), a gas rail assembly (7) and an engine (13) are sequentially connected to form a CNG fuel supply unit; the ECU (12) is respectively connected with seven sensors and four execution units to achieve control. By means of the automotive CNG and gasoline double-fuel supply system based on simultaneous control by the single ECU, the good dynamic property, economical efficiency of fuel, the environmental protection property of discharge, and safe reliability of control can be obtained, and the system is applicable to automotive double-fuel supply systems.
Description
Technical field
The present invention relates to automotive fuel supply system, particularly a kind of automobile CNG simultaneously controlling based on single ECU and gasoline double-fuel supply system.
Background technique
21 century, facing mankind the crisis that energy shortage and environmental pollution go from bad to worse.Along with the surge of automobile quantity in world wide and the consumption of petroleum resources, contradiction between oil supply and demand constantly aggravates.In order to tackle the problem at its root, need to carry out comprehensive improvement; Adopting substitute fuel is a kind of effective method, and application rock gas is one of problem of research at present as alternative motor fuels.
In order fundamentally to solve energy shortage and environmental pollution problem, the fuel oil supply system scheme of gasoline, natural gas double fuel engine has been proposed, realize Fuel Petroleum and supplied with the parallel use of supplying with gas fuel.
At present, what China's most of dual-fuel automotive fuel supply system adopted is two ECU technological schemes, and an ECU controls Fuel Petroleum and supplies with, and another ECU controls gas fuel and supplies with.This scheme has lower column defects:
1. exist two ECU to control two kinds of fuel simultaneously, not only take up room large, and cost of production is high;
2. CNG emitted dose is difficult to accurate control;
3. the basic fuel injection data of former machine ECU are exerted an influence, do not get rid of the risk that has 2 cover ECU phase mutual interference;
4. be difficult to reach driving and emission performance index request.
Summary of the invention
Object of the present invention is just to overcome the deficiency of above-mentioned existing background technique, and a kind of automobile CNG simultaneously controlling based on single ECU and gasoline double-fuel supply system are provided.
The object of the invention is to be achieved through the following technical solutions:
For installing the narrow limitation of a set of CNG fuel supply system on traditional automobile gasoline fuel supply system basis additional, the present invention's two cover fuel supply systems share an electronic control unit (ECU), effectively improved the control efficiency of dual fuel supply system, control convenient, flexiblely, and save system cost.
Specifically, native system is comprised of Fuel Petroleum case, petrol pump, gasoline pressure governor, fuel filter, oily rail assembly, motor, snifting valve, decompressor, high-pressure solenoid valve, combustion gas filter cleaner, natural gas cylinder and electronic control unit;
Its annexation is:
In Fuel Petroleum case, be provided with petrol pump and gasoline pressure governor;
Fuel Petroleum case, petrol pump, gasoline pressure governor, fuel filter, oily rail assembly, motor connect and compose Fuel Petroleum feed unit successively;
Natural gas cylinder, combustion gas filter cleaner, high-pressure solenoid valve, decompressor, gas rail assembly are connected successively with motor, form CNG fuel supply unit;
Cooling-water temperature transmitter and speed probe are arranged on engine body, and air inlet temperature/pressure sensor and throttle valve body assembly are arranged on engine intake manifold; Lambda sensor is arranged on engine exhaust pipe; Petrol pump relay is connected with petrol pump; Fuel gas temperature sensor is connected with gas rail assembly with gaseous-pressure sensor; Decompressor cooling-water temperature sensor is connected with decompressor; High-pressure solenoid valve is arranged on decompressor; Spark coil is connected with motor.
Electronic control unit is connected with power unit with sensor respectively, realizes and controlling.
The present invention has the following advantages and good effect:
1. the present invention includes vapour oil and gas two cover fuel supply systems, but only share an electronic control unit, intake manifold, without redesign, is saved design cycle and expense, and system is simple, and cost is low;
2. list ECU of the present invention controls double fuel simultaneously and controls best results;
3. gasoline of the present invention/CNG switching is stable and smooth-going, does not have the problem that affects on the basic fuel injection data of former ECU;
4. the present invention can reach good car steering and emission performance index request.
In a word, the present invention can obtain the safety reliability of the Economy of good power character, fuel, the feature of environmental protection of discharge and control, is applicable to Double-fuel supply system.
Accompanying drawing explanation
Fig. 1 is the structural representation of native system;
Fig. 2 is the control principle skeleton diagram of electronic control unit;
Fig. 3 is the workflow diagram that electronic control unit is controlled two kinds of Fuel switchings of oil gas.
In figure:
1-Fuel Petroleum case;
2-petrol pump,
2.1-petrol pump relay;
3-gasoline pressure governor;
4-fuel filter;
5-oily rail assembly;
6-motor,
6.1-air inlet temperature/pressure sensor, 6.2-cooling-water temperature transmitter,
6.3-lambda sensor, 6.4-throttle valve body assembly,
6.5-spark coil; 6.6-speed probe
7-gas rail assembly,
7.1-fuel gas temperature sensor.7.2-gaseous-pressure sensor;
8-decompressor,
8.1-decompressor cooling-water temperature sensor;
9-high-pressure solenoid valve;
10-combustion gas filter cleaner;
11-natural gas cylinder;
12-electronic control unit (ECU).
english to Chinese:
CNG:Compressed Natural Gas, is called for short compressed natural gas.
Embodiment
Below in conjunction with drawings and Examples, describe in detail:
One, system
1, overall
As Fig. 1, native system is comprised of Fuel Petroleum case 1, petrol pump 2, gasoline pressure governor 3, fuel filter 4, oily rail assembly 5, motor 6, snifting valve 7, decompressor 8, high-pressure solenoid valve 9, combustion gas filter cleaner 10, natural gas cylinder 11 and electronic control unit (ECU) 12;
Its annexation is:
In Fuel Petroleum case 1, be provided with petrol pump 2 and gasoline pressure governor 3;
Fuel Petroleum case 1, petrol pump 2, gasoline pressure governor 3, fuel filter 4, oily rail assembly 5, motor 6 connect and compose Fuel Petroleum feed unit successively;
Natural gas cylinder 11, combustion gas filter cleaner 10, high-pressure solenoid valve 9, decompressor 8, gas rail assembly 7 are connected successively with motor 6, form CNG fuel supply unit;
Cooling-water temperature transmitter 6.2 and speed probe 6.6 are arranged on engine body, and air inlet temperature/pressure sensor 6.1 and throttle valve body assembly 6.4 are arranged on engine intake manifold; Lambda sensor 6.3 is arranged on engine exhaust pipe; Petrol pump relay 2.1 is connected with petrol pump; Fuel gas temperature sensor 7.1 is connected with gas rail assembly with gaseous-pressure sensor 7.2; Decompressor cooling-water temperature sensor 8.1 is connected with decompressor; High-pressure solenoid valve 9 is arranged on decompressor; Spark coil 6.5 is connected with motor.
12 respectively with 7 sensors of electronic control unit are connected with 4 power units, realize and controlling.
2, functional part
Except electronic control unit (ECU) 12, other all functions parts are conventional part, have listing product.
Stress electronic control unit (ECU) 12 below
1) hardware configuration
As Fig. 2, electronic control unit (ECU) the 12nd, the control of engine system and command center, it comprises 16 singlechip CPU (Flash is that 256K, dominant frequency are 64Mhz), the sensor being connected with the input end of this single-chip microcomputer and the power unit being connected with the output terminal of single-chip microcomputer.
The input end of electronic control unit 12 is connected with air inlet temperature/pressure sensor 6.1, cooling-water temperature transmitter 6.2, lambda sensor 6.3, vehicle speed sensor 6.6, fuel gas temperature sensor 7.1, gaseous-pressure sensor 7.2 and decompressor cooling-water temperature sensor 8.1 respectively, obtains the data information that sensor gathers;
The output terminal of electronic control unit 12 is connected with petrol pump relay 2.1, throttle valve body assembly 6.4, spark coil 6.5 and high-pressure solenoid valve 9 respectively, realizes and controlling.
2) electronic control unit is controlled the workflow of two kinds of Fuel switchings of oil gas
As Fig. 3, this workflow comprises the following steps:
1. ECU starts working-301
ECU pick-up transducers input data, and send action order to power unit, thus control engine 6 work;
2. ECU judgement gathers decompressor water temperature signal and whether is less than 50 ℃-302, is to enter step 3., no
After controlling natural gas system startup work-309 by ECU, enter step 6.;
3. ECU controls petrol system startup work-303;
4. whether ECU judgement collection decompressor water temperature signal is greater than 50 ℃ and whether is greater than 250kpa with CNG pressure
-304, be to enter step 5., otherwise continue step 3.;
5. ECU controls gasoline and is switched to CNG system works-305;
6. ECU judges whether throttle opening is greater than 80%, whether oil level signal normal and relative speed variation whether
Being greater than 250-306, is to enter step 7., otherwise turn, jumps to step 5. or controls the rear continuation step in natural gas system startup work-309 6. by ECU;
7. ECU controls CNG and is switched to petrol system work (special operation condition)-307;
8. ECU judges whether throttle opening is greater than 80%, whether oil level signal normal and relative speed variation whether
Being greater than 250-308, is to turn to jump to step 5., otherwise turn, jumps to step 7..
Two, working procedure
1. when Fuel Petroleum feed unit works independently
Petrol pump 2 picks up Fuel Petroleum from Fuel Petroleum case 1 is interior, through gasoline pressure governor 3, carry out pressure regulation, and make excessive fuel oil return to petrol tank 1, through fuel filter 4 elimination impurity, then through transport pipe dispenses oil rail assembly 5, the instruction of sending according to electronic control unit (ECU) 12, sprays into each intake manifold by appropriate fuel oil, thereby completed Fuel Petroleum oil spout, supplies with process.
2. when rock gas fuel supply unit works independently
High-pressure solenoid valve 9 receives after the combustion gas work order that electronic control unit (ECU) 12 sends, high-pressure solenoid valve 9 is opened, high-pressure natural gas in natural gas cylinder 11 is after combustion gas filter cleaner 10 filters, by pressure duct, enter after decompressor 8 decompressions, by low pressure line, enter gas rail assembly 7 again, the instruction of sending according to electronic control unit (ECU) 12, controls the work of gas rail assembly 7, appropriate rock gas is sprayed into intake manifold, thereby completed gas fuel, supply with process.
While 3. being switched to gas fuel feed unit by Fuel Petroleum feed unit
When two kinds of fuel are all sufficient, the work of normal temperature Fuel Petroleum supply system, the interior circulating water temperature of decompressor 8 reaches after set temperature value, the work of CNG fuel supply system;
When Fuel Petroleum supply system is worked, when the temperature when electronic control unit 12 collects 8.1 work of decompressor cooling-water temperature sensor reaches and sets operating temperature, Fuel Petroleum supply system switches from trend gas fuel supply system; Now petrol pump 2 quits work, high-pressure solenoid valve 9 is opened, high-pressure natural gas in natural gas cylinder 11 is after combustion gas filter cleaner 10 filters, by pressure duct, enter decompressor 8 decompressions, by low pressure line, enter gas rail assembly 7 again, electronic control unit 12 is controlled the work of gas rail assembly 7, and appropriate rock gas is sprayed into intake manifold, carries out gas fuel supply.
While 4. being switched to Fuel Petroleum feed unit by gas fuel feed unit (special operation condition)
When gas fuel supply system is worked, throttle valve body assembly 6.4 reaches while setting opening value and Fuel Petroleum abundance, is switched the work of Fuel Petroleum supply system by gas fuel feed unit to Fuel Petroleum feed unit;
When gas fuel supply system is worked, when electronic control unit 12 collects throttle valve body assembly 6.4, reach and set aperture and gasoline level signal when normal, by gas fuel feed unit, to Fuel Petroleum feed unit, switched, now high-pressure solenoid valve 9 is closed, gas fuel feed unit quits work, the work order that FP Fuel Pump Relay 2.1 sends according to electronic control unit 12 is started working, and starts petrol pump 2, the work of Fuel Petroleum supply system.
While 5. being switched to gas fuel feed unit by Fuel Petroleum feed unit (special operation condition)
When Fuel Petroleum feed unit (special operation condition) is worked, when collecting throttle valve body assembly 6.4, electronic control unit 12 reaches when setting aperture and vehicle speed signal value and meeting certain index, by Fuel Petroleum feed unit (special operation condition), to gas fuel feed unit, switched, now electronic control unit 12 oil feed pump relays 2.1 send work order, FP Fuel Pump Relay 2.1 quits work petrol pump 2, high-pressure solenoid valve 9 is opened, and gas fuel feed unit is started working.
6. electronic control unit 12 is controlled Fuel Petroleum feed unit and gas fuel feed unit works independently simultaneously, and motor 12 is all first to be worked by Fuel Petroleum feed unit when each starting, then according to index of correlation, determines whether to carry out Fuel switching.
Claims (3)
1. the automobile CNG simultaneously controlling based on single ECU and a gasoline double-fuel supply system, is characterized in that:
By petrol tank (1), petrol pump (2), gasoline pressure governor (3), fuel filter (4), oily rail assembly (5), motor (6), gas rail assembly (7), decompressor (8), high-pressure solenoid valve (9), combustion gas filter cleaner (10), gas cylinder (11) and electronic control unit (12), formed;
In Fuel Petroleum case (1), be provided with petrol pump (2) and gasoline pressure governor (3);
Fuel Petroleum case (1, petrol pump (2), gasoline pressure governor (3), fuel filter (4), oily rail assembly (5), motor (6) connect and compose Fuel Petroleum feed unit successively;
Gas cylinder (11), combustion gas filter cleaner (10), high-pressure solenoid valve (9), decompressor (8), gas rail assembly (7) and motor (13) are connected successively, form CNG fuel supply unit;
Cooling-water temperature transmitter (6.1) and speed probe (6.6) are arranged on motor (6) body, and air inlet temperature/pressure sensor (6.2) and throttle valve body assembly (6.4) are arranged on engine intake manifold; Lambda sensor (6.3) is arranged on engine exhaust pipe; Petrol pump relay (2.1) is connected with petrol pump (2), and spark coil (6.5) is connected with motor (6) with high-pressure solenoid valve (9);
Electronic control unit (12) is connected with 4 power units with above-mentioned 7 sensors respectively, realizes and controlling.
2. by dual fuel supply system claimed in claim 1, it is characterized in that:
Described electronic control unit (12) is control and the command center of engine system, and it comprises 16 singlechip CPU sensor being connected with the input end of this single-chip microcomputer and the power unit being connected with the output terminal of single-chip microcomputer;
The input end of electronic control unit (12) is connected with air inlet temperature/pressure sensor (6.1), cooling-water temperature transmitter (6.2), lambda sensor (6.3), vehicle speed sensor (6.6), fuel gas temperature sensor (7.1), gaseous-pressure sensor (7.2) and decompressor cooling-water temperature sensor (8.1) respectively, obtains heat transfer agent;
The output terminal of electronic control unit (12) is connected with petrol pump relay (2.1), throttle valve body assembly (6.4), spark coil (6.5) and high-pressure solenoid valve (9) respectively, realizes and controlling.
3. the electronic control unit based on dual fuel supply system described in claim 1 is controlled the workflow of two kinds of Fuel switchings of oil gas, it is characterized in that:
1. ECU start working (301)
ECU pick-up transducers input data, and send action order to power unit, thus control engine (6) work;
2. ECU judgement gathers decompressor water temperature signal and whether is less than 50 ℃ (302), is to enter step 3., no
By ECU, control after natural gas system startup work (309) and turn and jump to step 6.;
3. ECU controls petrol system startup work (303);
4. whether ECU judgement collection decompressor water temperature signal is greater than 50 ℃ and whether is greater than 250kpa with CNG pressure
(304), be to enter step 5., otherwise turn, jump to step 3.;
5. ECU controls gasoline and is switched to CNG system works (305);
6. ECU judges whether throttle opening is greater than 80%, whether oil level signal normal and relative speed variation whether
Be greater than 250(306), be to enter step 7., otherwise turn, jump to step 5. or control the rear continuation of natural gas system startup work (309) step 6. by ECU;
7. ECU controls CNG and is switched to petrol system work (307);
8. ECU judges whether throttle opening is greater than 80%, whether oil level signal normal and relative speed variation whether
Be greater than 250(308), be to turn to jump to step 5., otherwise turn, jump to step 7..
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310617995.1A CN103628989A (en) | 2013-11-28 | 2013-11-28 | Automotive CNG and gasoline double-fuel supply system based on simultaneous control by single ECU |
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| CN201310617995.1A CN103628989A (en) | 2013-11-28 | 2013-11-28 | Automotive CNG and gasoline double-fuel supply system based on simultaneous control by single ECU |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103835818A (en) * | 2014-03-18 | 2014-06-04 | 武汉理工大学 | Independently controlled ignition switch auxiliary type dual-purpose fuel switching control method |
| CN104295380A (en) * | 2014-08-15 | 2015-01-21 | 华南农业大学 | Control system for engine consuming CNG/gasoline |
| CN105756785A (en) * | 2016-04-21 | 2016-07-13 | 合肥宝发动力技术有限公司 | Multi-fuel electronic injection engine for forklift |
| CN105927406A (en) * | 2016-05-04 | 2016-09-07 | 山东大学 | Multi-point gas electric control spraying system and method based on pressure-time control |
| CN106368807A (en) * | 2016-10-13 | 2017-02-01 | 江苏上淮动力有限公司 | Dual-purpose fuel engine for natural gas single-fuel automobile and control method thereof |
| CN106870174A (en) * | 2017-02-23 | 2017-06-20 | 浙江吉利控股集团有限公司 | A kind of high compression ratio compressed gas special engine for vehicle |
| CN107420209A (en) * | 2017-06-26 | 2017-12-01 | 雄创（上海）新能源科技有限公司 | For the self-clearing electronic-controlled installation of Vehicular exhaust |
| CN109404128A (en) * | 2018-10-29 | 2019-03-01 | 台州吉利罗佑发动机有限公司 | Double fuel is double for oil turbine and its control method |
| CN109642507A (en) * | 2016-06-21 | 2019-04-16 | Cng机车公司 | The dual fuel tank applied for locomotive and ocean |
| CN110500189A (en) * | 2018-05-17 | 2019-11-26 | 北汽福田汽车股份有限公司 | Start method and apparatus, storage medium and the vehicle of vehicle |
| CN113882946A (en) * | 2021-09-15 | 2022-01-04 | 重庆磐谷动力技术有限公司 | 12-cylinder single ECU engine wiring harness |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103835818B (en) * | 2014-03-18 | 2016-07-27 | 武汉理工大学 | A kind of independent control type ignition switch auxiliary type dual-purpose fuel method for handover control |
| CN103835818A (en) * | 2014-03-18 | 2014-06-04 | 武汉理工大学 | Independently controlled ignition switch auxiliary type dual-purpose fuel switching control method |
| CN104295380A (en) * | 2014-08-15 | 2015-01-21 | 华南农业大学 | Control system for engine consuming CNG/gasoline |
| CN105756785A (en) * | 2016-04-21 | 2016-07-13 | 合肥宝发动力技术有限公司 | Multi-fuel electronic injection engine for forklift |
| CN105927406A (en) * | 2016-05-04 | 2016-09-07 | 山东大学 | Multi-point gas electric control spraying system and method based on pressure-time control |
| CN105927406B (en) * | 2016-05-04 | 2018-09-28 | 山东大学 | Multi-point gas electric-controlling injection system and method based on pressure versus time control |
| CN109642507A (en) * | 2016-06-21 | 2019-04-16 | Cng机车公司 | The dual fuel tank applied for locomotive and ocean |
| CN109642507B (en) * | 2016-06-21 | 2021-12-10 | Cng机车公司 | Dual fuel tank for locomotive and marine applications |
| CN106368807A (en) * | 2016-10-13 | 2017-02-01 | 江苏上淮动力有限公司 | Dual-purpose fuel engine for natural gas single-fuel automobile and control method thereof |
| CN106870174A (en) * | 2017-02-23 | 2017-06-20 | 浙江吉利控股集团有限公司 | A kind of high compression ratio compressed gas special engine for vehicle |
| CN107420209A (en) * | 2017-06-26 | 2017-12-01 | 雄创（上海）新能源科技有限公司 | For the self-clearing electronic-controlled installation of Vehicular exhaust |
| CN110500189A (en) * | 2018-05-17 | 2019-11-26 | 北汽福田汽车股份有限公司 | Start method and apparatus, storage medium and the vehicle of vehicle |
| CN109404128A (en) * | 2018-10-29 | 2019-03-01 | 台州吉利罗佑发动机有限公司 | Double fuel is double for oil turbine and its control method |
| CN113882946A (en) * | 2021-09-15 | 2022-01-04 | 重庆磐谷动力技术有限公司 | 12-cylinder single ECU engine wiring harness |
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Application publication date: 20140312 |