CN102748143B - Control method for power system of dimethyl ether/hydrogen internal combustion engine - Google Patents
Control method for power system of dimethyl ether/hydrogen internal combustion engine Download PDFInfo
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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
- Y02T10/12—Improving ICE efficiencies
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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
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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Abstract
The invention provides a power system of a dimethyl ether/hydrogen internal combustion engine and a control method for the power system of the dimethyl ether/hydrogen internal combustion engine, belonging to the fields of energy saving and the use of alternative fuels of the internal combustion engine. The power system comprises a dimethyl ether gas supply device and a hydrogen gas supply device, wherein dimethyl ether is reformed to produce hydrogen by the waste heat of the tail gas. The power system also comprises a dimethyl ether tank and a hydrogen tank, a tail gas waste heat reforming device, a blended fuel control unit and a dimethyl ether reformer controller, and input signals such as a crank angle signal, a cooling water temperature signal, a gas inlet temperature and pressure signal, and output signals such as a dimethyl ether jetting signal and a hydrogen jetting signal, an igniting module signal, an idle speed motor control signal, and a tail gas waste heat reforming device control signal. According to the invention, the discharging performance and the combustion performance of a spark ignition engine can be improved and increased due to dimethyl ether and hydrogen, and hydrogen is produced by reforming dimethyl ether, so that the use cost can be reduced, and the compensation of hydrogen can be realized. The device is simple in design structure, easy to install, and lower in cost, and the system is further good in adaptability and expansibility, wide in market prospect, and better in economic benefit.
Description
Technical field
The invention provides a kind of controlling method of power system of dimethyl ether/hydrogen internal combustion engine, the fuel supply and reforming being specifically related to a kind of internal-combustion engine utilize, Combustion System and the method for operation, belong to combustion engine energy-saving and substitute fuel utilizes field.
Background technique
Due to the problem such as environmental pollution and energy shortage, improve concern and research emphasis that the discharge of vehicular engine and performance have become relevant industry.There is many objective problem in conventional point combustion petrol engine, and cause cost and increase to reduce to discharge and improve many new technologies etc. that performance adopts and manufacture the new problems such as difficulty in running.Utilize vaporized fuel not only can solve energy-intensive problem as the fuel of internal-combustion engine, more can reduce due to problems such as traditional fuel mixing are uneven, insufficient discharge caused of burning is high.First, for conventional point combustion petrol engine, due to oil gas mixed air enter firing chamber after fuel evaporation not enough and form oil film and cause that burning is insufficient, discharge is higher; Secondly, when motor is in the operating mode such as cold starting and idling, due to rotating speed cause that air-fuel mixture is uneven equally compared with reasons such as low, air inlet poor fluidities, the problem such as residual gas is many in firing chamber, mixture combustion is insufficient; Finally, conventional engine chance increases fuel injection quantity and can start smoothly to improve motor, and causes maximum discharge and high oil consumption thus.And use merely the new energy such as hydrogen the performance of motor can be made cannot to meet the demands or need to adjust largely motor because of the physicochemical property of fuel self as the main source of energy of motor.In addition, the new energy such as hydrogen due to the processes such as its preparation, accumulating comparatively complicated, also result in the significantly increase of cost.To sum up, improve the burning of spark-ignition engine, Operation Conditions and emission status and can utilize mixed gaseous state new energy fuel, dimethyl ether and hydrogen are passed through different control strategies as motor fuel under different operating conditions, not only can solving the problems such as conventional engines discharge is high, performance is low, also providing a kind of more satisfactory solution for reducing costs.
Summary of the invention
In order to improve discharge and the runnability of ignition internal combustion engine, the present invention proposes a kind of controlling method of power system of dimethyl ether/hydrogen internal combustion engine.
The present invention adopts following technological scheme:
This power system comprises dimethyl ether and hydrogen two overlaps air feeder, utilizes using waste heat from tail gas of internal combustion engine to carry out reformation hydrogen production to dimethyl ether simultaneously, is improved the combustion and emission performance of ignition internal combustion engine, specifically comprise dimethyl ether tank 1 by burning dimethyl ether and hydrogen, hydrogen gas tank 2, using waste heat from tail gas reformer 3, fuel combination control unit 4, ignition internal combustion engine 5, dimethyl ether nozzle 6, hydrogen nozzle 7, reforming dimethyl ether device controller 8, reformer hydrogen processor 9, internal-combustion engine vent-pipe 10, inlet manifold of IC engine 11, ignition module 12, idling motor 13, hydrogen gas tank pressure transducer 14, reformer temperature sensor 15, the corner signal a1 of dimethyl ether pressure transducer 16 and the CAP sensor by the input of ignition internal combustion engine 5 sensor, the cooling water temperature signal a2 of cooling-water temperature sensor, the intake air temperature signals a3 of intake air temperature sensor, the boost pressure signal a4 of air inlet pressure sensor, the throttle position signal a5 of throttle position sensor, the firing pressure of detonation sensor and detonation signal a6, the air fuel ratio signal a7 of linear oxygen sensors, hydrogen gas tank pressure signal a8, reformer temperature signal a9, the dimethyl ether injection signal b1 that dimethyl ether pressure signal a10 and fuel combination control unit 4 export, hydrogen injection signal b2, ignition module signal b3, idling motor control signal b4, using waste heat from tail gas reformer control signal b5.
Dimethyl ether tank 1 and dimethyl ether nozzle 6 are linked, dimethyl ether nozzle 6 is arranged on inlet manifold of IC engine 11, dimethyl ether injection signal b1 is transferred to dimethyl ether nozzle 6 to control time for spraying and pulsewidth by fuel combination control unit 4, hydrogen gas tank 2 and hydrogen nozzle 7 are linked, hydrogen nozzle 7 is arranged on inlet manifold of IC engine 11, hydrogen injection signal b2 is transferred to hydrogen nozzle 7 to control time for spraying and pulsewidth by fuel combination control unit 4, dimethyl ether tank 1 is connected with reforming dimethyl ether device controller 8, reforming dimethyl ether device controller 8 is connected with using waste heat from tail gas reformer 3, reforming dimethyl ether device controller 8 is connected with fuel combination control unit 4, fuel combination control unit 4 sends using waste heat from tail gas reformer control signal b5 to reforming dimethyl ether device controller 8, using waste heat from tail gas reformer 3 is arranged on internal-combustion engine vent-pipe 10, the air outlet of using waste heat from tail gas reformer 3 is connected with reformer hydrogen processor 9 and makes reformer hydrogen enter into hydrogen gas tank 2 after reformer hydrogen processor 9 filter-press to store, reformer temperature sensor 15 is arranged on using waste heat from tail gas reformer 3, reformer temperature sensor 15 feeds back reformer temperature signal a9 to fuel combination control unit 4, dimethyl ether pressure transducer 16 is arranged on dimethyl ether tank, dimethyl ether pressure transducer 16 feeds back dimethyl ether pressure signal a10 to fuel combination control unit 4, hydrogen gas tank 2 is connected with hydrogen gas tank pressure transducer 14, and hydrogen gas tank pressure signal a8 is fed back to fuel combination control unit 4, ignition module 12 and idling motor 13 to be connected with fuel combination control unit 4 respectively by electric wire and to be arranged on ignition internal combustion engine 5,
Fuel combination control unit 4 improves on the basis of the existing electronic control unit of ignition internal combustion engine 5, by reading the corner signal a1 of the CAP sensor inputted by ignition internal combustion engine 5 sensor, the cooling water temperature signal a2 of cooling-water temperature sensor, the intake air temperature signals a3 of intake air temperature sensor, the boost pressure signal a4 of air inlet pressure sensor, the throttle position signal a5 of throttle position sensor, the firing pressure of detonation sensor and detonation signal a6, the air fuel ratio signal a7 of linear oxygen sensors, by analyzing the operating mode determining that internal-combustion engine runs thus to signal, fuel combination control unit 4 realizes controlling the injection of dimethyl ether and hydrogen on the basis retaining original controlling functions, control using waste heat from tail gas reformer 3 simultaneously, when the temperature that reformer temperature sensor 15 detects using waste heat from tail gas reformer 3 is higher than 350 degrees Celsius, dimethyl ether is generated hydrogen by using waste heat from tail gas reformation be used,
After the pressure detected in hydrogen gas tank 2 when hydrogen gas tank pressure transducer 14 equals tank body pressure maximum limit, hydrogen gas tank pressure signal a8 is fed back to fuel combination control unit 4, fuel combination control unit 4 sends using waste heat from tail gas reformer control signal b5 makes reforming dimethyl ether device controller 8 cut off dimethyl ether air feed, when reformer temperature sensor 15 detects that in using waste heat from tail gas reformer 3, temperature reaches reforming dimethyl ether temperature, reformer temperature sensor 15 sends reformer temperature signal a9 to fuel combination control unit 4, fuel combination control unit 4 sends using waste heat from tail gas reformer control signal b5 again makes reforming dimethyl ether device controller 8 open dimethyl ether air feed,
The operating conditions of ignition internal combustion engine 5 is divided into starting-idling and the two kinds of control modes that run well according to original electronic control unit by fuel combination control unit 4, and concrete control mode comprises:
One, starting-idling operation: under this operating mode, fuel combination control unit 4 is according to the control mode adjustment injection pulse width of original electronic control unit and moment, fuel using pure Dimethyl ether as ignition internal combustion engine 5 under this operating mode, fuel combination control unit 4 exports dimethyl ether injection signal b1 to dimethyl ether nozzle 6, fuel combination control unit 4 exports igniting module by signal b3 to ignition module 12, fuel combination control unit 4 exports idling motor control signal b4 to idling motor 13, fuel combination control unit 4 exports using waste heat from tail gas reformer control signal b5 to reforming dimethyl ether device controller 8, the dimethyl ether in dimethyl ether tank 1 is made to enter into using waste heat from tail gas reformer 3 by reforming dimethyl ether device controller 8, the hydrogen produced enters into hydrogen gas tank 2 through reformer hydrogen processor 9,
Two, normal operation operating mode: the fuel using pure hydrogen as ignition internal combustion engine 5 under this operating mode, fuel combination control unit 4 exports hydrogen injection signal b2 to hydrogen nozzle 7, fuel combination control unit 4 exports igniting module by signal b3 to ignition module 12, fuel combination control unit 4 exports idling motor control signal b4 to idling motor 13, fuel combination control unit 4 exports using waste heat from tail gas reformer control signal b5 to reforming dimethyl ether device controller 8, the dimethyl ether in dimethyl ether tank 1 is made to enter into using waste heat from tail gas reformer 3 by reforming dimethyl ether device controller 8, the hydrogen produced enters into hydrogen gas tank 2 through reformer hydrogen processor 9,
Two kinds of above operating modes are run and all should be carried out demonstration test by stand, determine corresponding dimethyl ether, hydrogen injection amount and time of ignition, internal-combustion engine can not occurred catching fire or pinking by normal starting.
When fuel combination control unit 4 detects that the firing pressure of detonation sensor and the air fuel ratio signal a7 of detonation signal a6 and linear oxygen sensors and theoretical target values depart from more than 3%, fuel combination control unit 4 checks the corner signal a1 of CAP sensor again, the cooling water temperature signal a2 of cooling-water temperature sensor, the intake air temperature signals a3 of intake air temperature sensor, the boost pressure signal a4 of air inlet pressure sensor and the throttle position signal a5 of throttle position sensor, and regulate dimethyl ether injection signal b1, hydrogen injection signal b2, ignition module signal b3 and idling motor control signal b4, ignition internal combustion engine 5 can be worked under closed loop control.
In this power system, dimethyl ether tank 1 is linked by Stainless Steel Tube or nylon tube and dimethyl ether nozzle 6, hydrogen gas tank 2 is linked by Stainless Steel Tube or nylon tube and hydrogen nozzle 7, dimethyl ether tank 1 is connected with reforming dimethyl ether device controller 8 by Stainless Steel Tube or nylon tube, reforming dimethyl ether device controller 8 is connected with using waste heat from tail gas reformer 3 by Stainless Steel Tube or nylon tube, fuel combination control unit 4 is by electric wire and dimethyl ether nozzle 6, hydrogen nozzle 7, reforming dimethyl ether device controller 8, ignition module 12, idling motor 13, hydrogen gas tank pressure transducer 14, reformer temperature sensor 15, dimethyl ether pressure transducer 16 is connected.
The invention has the beneficial effects as follows, the problems such as the burning existed in the running for conventional point internal combustion engine and discharge, propose a kind of dimethyl ether and hydrogen mixed fuel ignition internal combustion engine power system and control mode.Internal-combustion engine of the present invention adopts dimethyl ether and the ignition mode of hydrogen under different operating conditions, when cold starting and idling, by the fuel of dimethyl ether as ignition internal combustion engine, when other operating conditions, by the fuel of hydrogen as ignition internal combustion engine, hydrogen preparation by reforming dimethyl ether steam is with hydrogen make-up raw material simultaneously.
The combustion manner that ignition internal combustion engine adopts dimethyl ether and hydrogen to light improves and improves the burning of internal-combustion engine and emission performance and is one and facilitates feasible technology path, by fuel combination control unit 4, the signal gathered is analyzed, and in conjunction with self calculating and controlling functions, nozzle dimethyl ether nozzle 6 and hydrogen nozzle 7 are controlled, and control ignition module 12, idling motor 13, ensure that internal-combustion engine can run well.Meanwhile, using waste heat from tail gas reformer 3 utilizes using waste heat from tail gas to carry out reformation hydrogen production to dimethyl ether, meets vehicle hydrogen demand on the one hand, also utilizes using waste heat from tail gas simultaneously.By adopting dimethyl ether and hydrogen mixed fuel ignition mode in different operating mode, achieve the optimization control to conventional point combustion engine exhaust and burning, improve engine performance, reduce oil consumption and discharge, make use of the using waste heat from tail gas of motor simultaneously, reducing overall cost, is therefore a kind ofly improve the simple of engine performance and the technological means of practicality.
Accompanying drawing explanation
Fig. 1 structure of the present invention and fundamental diagram
1 dimethyl ether tank in figure, 2 hydrogen gas tank, 3 using waste heat from tail gas reformers, 4 fuel combination control units, 5 ignition internal combustion engines, 6 dimethyl ether nozzles, 7 hydrogen nozzles, 8 reforming dimethyl ether device controllers, 9 reformer hydrogen processors, 10 internal-combustion engine vent-pipes, 11 inlet manifold of IC engine, 12 ignition modules, 13 idling motors, 14 hydrogen gas tank pressure transducers, 15 reformer temperature sensors, 16 dimethyl ether pressure transducers, the corner signal of a1 CAP sensor, the cooling water temperature signal of a2 cooling-water temperature sensor, the intake air temperature signals of a3 intake air temperature sensor, the boost pressure signal of a4 air inlet pressure sensor, the throttle position signal of a5 throttle position sensor, the firing pressure of a6 detonation sensor and detonation signal, the air fuel ratio signal of a7 linear oxygen sensors, a8 hydrogen gas tank pressure signal, a9 reformer temperature signal, a10 dimethyl ether pressure signal, b1 dimethyl ether injection signal, b2 hydrogen injection signal, b3 ignition module signal, b4 idling motor control signal, b5 using waste heat from tail gas reformer control signal
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described further:
Dimethyl ether/hydrogen engine power system and controlling method, this system for improving burning and the emission performance of ignition internal combustion engine, and utilizes using waste heat from tail gas, comprises dimethyl ether tank 1, hydrogen gas tank 2, using waste heat from tail gas reformer 3, fuel combination control unit 4, ignition internal combustion engine 5, dimethyl ether nozzle 6, hydrogen nozzle 7, reforming dimethyl ether device controller 8, reformer hydrogen processor 9, internal-combustion engine vent-pipe 10, inlet manifold of IC engine 11, ignition module 12, idling motor 13, hydrogen gas tank pressure transducer 14, reformer temperature sensor 15, the corner signal a1 of dimethyl ether pressure transducer 16 and the CAP sensor by the various sensors inputs of ignition internal combustion engine 5, the cooling water temperature signal a2 of cooling-water temperature sensor, the intake air temperature signals a3 of intake air temperature sensor, the boost pressure signal a4 of air inlet pressure sensor, the throttle position signal a5 of throttle position sensor, the firing pressure of detonation sensor and detonation signal a6, the air fuel ratio signal a7 of linear oxygen sensors, hydrogen gas tank pressure signal a8, reformer temperature signal a9, the dimethyl ether injection signal b1 that dimethyl ether pressure signal a10 and fuel combination control unit 4 export, hydrogen injection signal b2, ignition module signal b3, idling motor control signal b4, using waste heat from tail gas reformer control signal b5.
Following experiment has been done in different operating mode in conjunction with foregoing invention device:
Test and carry out on the modern Avante XD in a Beijing, the motor of this car equipment is 1 array 4 cylinder 1.6L electronic injection gasoline engine, by shown in Fig. 1, dimethyl ether tank 1 is linked by Stainless Steel Tube and dimethyl ether nozzle 6, dimethyl ether nozzle 6 is arranged on inlet manifold of IC engine 11, hydrogen gas tank 2 is linked by Stainless Steel Tube and hydrogen nozzle 7, hydrogen nozzle 7 is arranged on inlet manifold of IC engine 11, dimethyl ether tank 1 is connected with reforming dimethyl ether device controller 8 by Stainless Steel Tube, reforming dimethyl ether device controller 8 is connected with using waste heat from tail gas reformer 3 by Stainless Steel Tube, fuel combination control unit 4 is by electric wire and dimethyl ether nozzle 6, hydrogen nozzle 7 and reforming dimethyl ether device controller 8 are connected, using waste heat from tail gas reformer 3 is arranged on internal-combustion engine vent-pipe 10, the air outlet of using waste heat from tail gas reformer 3 is connected with reformer hydrogen processor 9 and makes reformer hydrogen enter into hydrogen gas tank 2 after reformer hydrogen processor 9 filter-press to store, reformer temperature sensor 15 is arranged on using waste heat from tail gas reformer 3, hydrogen gas tank 2 is connected with hydrogen gas tank pressure transducer 14, and hydrogen gas tank pressure signal a8 is fed back to fuel combination control unit 4, ignition module 12 and idling motor 13 to be connected with fuel combination control unit 4 respectively by electric wire and to be arranged on ignition internal combustion engine 5.
Fuel combination control unit 4 improves on the basis of the existing electronic control unit of ignition internal combustion engine 5, by reading the corner signal a1 of ignition internal combustion engine 5 CAP sensor, the cooling water temperature signal a2 of cooling-water temperature sensor, the intake air temperature signals a3 of intake air temperature sensor, the boost pressure signal a4 of air inlet pressure sensor, the throttle position signal a5 of throttle position sensor, the firing pressure of detonation sensor and detonation signal a6, the air fuel ratio signal a7 of linear oxygen sensors determines the operating mode that motor runs, fuel combination control unit 4 realizes controlling the injection of dimethyl ether and hydrogen on the basis retaining original controlling functions, control using waste heat from tail gas reformer 3 simultaneously, dimethyl ether is generated hydrogen by using waste heat from tail gas reformation be used.
In process of the test, the Horiba-7100DEGR emission analyzer produced with a Japanese Ku Chang Co., Ltd., measures HC, CO and the NO under each operating conditions of internal-combustion engine respectively
xdischarge.
Pilot engine, according to the control mode of original electronic control unit, fuel combination control unit 4 judges that motor is in cold starting and warm idle state, fuel using pure Dimethyl ether as ignition internal combustion engine 5 under this operating mode, fuel combination control unit 4 exports dimethyl ether injection signal b1 to dimethyl ether nozzle 6, fuel combination control unit 4 exports igniting module by signal b3 to ignition module 12, fuel combination control unit 4 exports idling motor control signal b4 to idling motor 13, now reformer temperature sensor 15 detects that in using waste heat from tail gas reformer 3, temperature is lower than 350 degrees Celsius, therefore fuel combination control unit closes reforming dimethyl ether device controller 8,
Under idling operation, continue the fuel using pure Dimethyl ether as ignition internal combustion engine 5, after reformer temperature sensor 15 detects that in using waste heat from tail gas reformer 3, temperature is higher than 350 degrees Celsius, fuel combination control unit opens reforming dimethyl ether device controller 8, by dimethyl ether air feed to using waste heat from tail gas reformer 3, the hydrogen generated in using waste heat from tail gas reformer 3 enters hydrogen gas tank 2 after reformer hydrogen processor 9 purification is forced into 10MPa;
Bend the throttle, fuel combination control unit 4 judges that motor is in rated speed operating mode, fuel using pure hydrogen as ignition internal combustion engine 5 under this operating mode, fuel combination control unit 4 exports hydrogen injection signal b2 to hydrogen nozzle 7, fuel combination control unit 4 exports igniting module by signal b3 to ignition module 12, now reformer temperature sensor 15 detects that in using waste heat from tail gas reformer 3, temperature continues higher than 350 degrees Celsius, fuel combination control unit 4 continues to open reforming dimethyl ether device controller 8, make dimethyl ether air feed to using waste heat from tail gas reformer 3, the hydrogen generated in using waste heat from tail gas reformer 3 enters hydrogen gas tank 2 after reformer hydrogen processor 9 purification is forced into 10MPa,
Release the gas pedal, fuel combination control unit 4 judges that idling operation got back to by motor, continue the fuel using pure Dimethyl ether as ignition internal combustion engine 5, after reformer temperature sensor 15 detects that in using waste heat from tail gas reformer 3, temperature is higher than 350 degrees Celsius, fuel combination control unit opens reforming dimethyl ether device controller 8, by dimethyl ether air feed to using waste heat from tail gas reformer 3, the hydrogen generated in using waste heat from tail gas reformer 3 enters hydrogen gas tank 2 after reformer hydrogen processor 9 purification is forced into 10MPa;
Kill engine, fuel combination control unit 4 cuts off dimethyl ether injection signal b1, hydrogen injection signal b2, ignition module signal b3, idling motor control signal b4, using waste heat from tail gas reformer control signal b5.
Detect through exhaust analyzer, compare conventional gasoline spark-ignition engine, under cold starting and idling mode, adopt pure Dimethyl ether can reduce CO discharge 30% as fuel, reduction HC and NOx emission reach 50%; Under accidental conditions, adopt pure hydrogen as fuel, CO and HC discharge is zero, and NOx emission reduces by 30%.
By testing dimethyl ether and hydrogen hybrid power internal combustion engine power system and control mode, its result shows, adopt dimethyl ether provided by the invention/hydrogen engine power system and controlling method, effectively can improve the combustion thermal efficiency of conventional point combustion engine, using waste heat from tail gas be recycled simultaneously.This technology by reach Europe V and above emission standard for Vehicular internal combustion engine and reduce oil and fuel use and consumption provides an effective technological approaches.
Claims (3)
1. the controlling method of power system of dimethyl ether/hydrogen internal combustion engine, comprises dimethyl ether tank (1), hydrogen gas tank (2), ignition internal combustion engine (5), dimethyl ether nozzle (6), hydrogen nozzle (7), internal-combustion engine vent-pipe (10), inlet manifold of IC engine (11), ignition module (12), idling motor (13), hydrogen gas tank pressure transducer (14), the corner signal (a1) of dimethyl ether pressure transducer (16) and the CAP sensor by the input of ignition internal combustion engine (5) sensor, the cooling water temperature signal (a2) of cooling-water temperature sensor, the intake air temperature signals (a3) of intake air temperature sensor, the boost pressure signal (a4) of air inlet pressure sensor, the throttle position signal (a5) of throttle position sensor, the firing pressure of detonation sensor and detonation signal (a6), the air fuel ratio signal (a7) of linear oxygen sensors, hydrogen gas tank pressure signal (a8), dimethyl ether pressure signal (a10), is characterized in that: also comprise using waste heat from tail gas reformer (3), fuel combination control unit (4), reforming dimethyl ether device controller (8), reformer hydrogen processor (9), reformer temperature sensor (15), reformer temperature signal (a9), the dimethyl ether injection signal (b1) that fuel combination control unit (4) exports, hydrogen injection signal (b2), ignition module signal (b3), idling motor control signal (b4), using waste heat from tail gas reformer control signal (b5),
Dimethyl ether tank (1) and dimethyl ether nozzle (6) are linked, dimethyl ether nozzle (6) is arranged on inlet manifold of IC engine (11), dimethyl ether injection signal (b1) is transferred to dimethyl ether nozzle (6) to control time for spraying and pulsewidth by fuel combination control unit (4), hydrogen gas tank (2) and hydrogen nozzle (7) are linked, hydrogen nozzle (7) is arranged on inlet manifold of IC engine (11), hydrogen injection signal (b2) is transferred to hydrogen nozzle (7) to control time for spraying and pulsewidth by fuel combination control unit (4), dimethyl ether tank (1) is connected with reforming dimethyl ether device controller (8), reforming dimethyl ether device controller (8) is connected with using waste heat from tail gas reformer (3), reforming dimethyl ether device controller (8) is connected with fuel combination control unit (4), fuel combination control unit (4) sends using waste heat from tail gas reformer control signal (b5) to reforming dimethyl ether device controller (8), using waste heat from tail gas reformer (3) is arranged on internal-combustion engine vent-pipe (10), the air outlet of using waste heat from tail gas reformer (3) is connected with reformer hydrogen processor (9) and makes reformer hydrogen after reformer hydrogen processor (9) filter-press, enter into hydrogen gas tank (2) to store, reformer temperature sensor (15) is arranged on using waste heat from tail gas reformer (3), reformer temperature sensor (15) is to fuel combination control unit (4) feedback reformer temperature signal (a9), dimethyl ether pressure transducer (16) is arranged on dimethyl ether tank, dimethyl ether pressure transducer (16) is to fuel combination control unit (4) feedback dimethyl ether pressure signal (a10), hydrogen gas tank (2) is connected with hydrogen gas tank pressure transducer (14), and hydrogen gas tank pressure signal (a8) is fed back to fuel combination control unit (4), ignition module (12) and idling motor (13) to be connected with fuel combination control unit (4) respectively by electric wire and to be arranged on ignition internal combustion engine (5),
Fuel combination control unit (4) improves on the basis of ignition internal combustion engine (5) existing electronic control unit, by reading the corner signal (a1) of the CAP sensor inputted by ignition internal combustion engine (5) sensor, the cooling water temperature signal (a2) of cooling-water temperature sensor, the intake air temperature signals (a3) of intake air temperature sensor, the boost pressure signal (a4) of air inlet pressure sensor, the throttle position signal (a5) of throttle position sensor, the firing pressure of detonation sensor and detonation signal (a6), the air fuel ratio signal (a7) of linear oxygen sensors, by analyzing the operating mode determining that internal-combustion engine runs thus to signal, fuel combination control unit (4) realizes controlling the injection of dimethyl ether and hydrogen on the basis retaining original controlling functions, control using waste heat from tail gas reformer (3) simultaneously, when the temperature of reformer temperature sensor (15) detection using waste heat from tail gas reformer (3) is higher than 350 degrees Celsius, dimethyl ether is generated hydrogen by using waste heat from tail gas reformation be used,
After the pressure detected in hydrogen gas tank (2) when hydrogen gas tank pressure transducer (14) equals tank body pressure maximum limit, hydrogen gas tank pressure signal (a8) is fed back to fuel combination control unit (4), fuel combination control unit (4) sends using waste heat from tail gas reformer control signal (b5) makes reforming dimethyl ether device controller (8) cut off dimethyl ether air feed, when reformer temperature sensor (15) detects that in using waste heat from tail gas reformer (3), temperature reaches reforming dimethyl ether temperature, reformer temperature sensor (15) sends reformer temperature signal (a9) to fuel combination control unit (4), fuel combination control unit (4) sends using waste heat from tail gas reformer control signal (b5) again makes reforming dimethyl ether device controller (8) open dimethyl ether air feed,
The operating conditions of ignition internal combustion engine (5) is divided into starting-idling and the two kinds of control modes that run well according to original electronic control unit by fuel combination control unit (4), and concrete control mode comprises:
1) starting-idling operation: under this operating mode, fuel combination control unit (4) is according to the control mode adjustment injection pulse width of original electronic control unit and moment, fuel using pure Dimethyl ether as ignition internal combustion engine (5) under this operating mode, fuel combination control unit (4) exports dimethyl ether injection signal (b1) to dimethyl ether nozzle (6), fuel combination control unit (4) exports igniting module by signal (b3) to ignition module (12), fuel combination control unit (4) exports idling motor control signal (b4) to idling motor (13), fuel combination control unit (4) exports using waste heat from tail gas reformer control signal (b5) to reforming dimethyl ether device controller (8), the dimethyl ether in dimethyl ether tank (1) is made to enter into using waste heat from tail gas reformer (3) by reforming dimethyl ether device controller (8), the hydrogen produced enters into hydrogen gas tank (2) through reformer hydrogen processor (9),
2) normal operation operating mode: the fuel using pure hydrogen as ignition internal combustion engine (5) under this operating mode, fuel combination control unit (4) exports hydrogen injection signal (b2) to hydrogen nozzle (7), fuel combination control unit (4) exports igniting module by signal (b3) to ignition module (12), fuel combination control unit (4) exports idling motor control signal (b4) to idling motor (13), fuel combination control unit (4) exports using waste heat from tail gas reformer control signal (b5) to reforming dimethyl ether device controller (8), the dimethyl ether in dimethyl ether tank (1) is made to enter into using waste heat from tail gas reformer (3) by reforming dimethyl ether device controller (8), the hydrogen produced enters into hydrogen gas tank (2) through reformer hydrogen processor (9),
Two kinds of above operating modes are run and all should be carried out demonstration test by stand, determine corresponding dimethyl ether, hydrogen injection amount and time of ignition, internal-combustion engine can not occurred catching fire or pinking by normal starting.
2. the controlling method of power system of dimethyl ether/hydrogen internal combustion engine according to claim 1, it is characterized in that, when fuel combination control unit (4) detects the firing pressure of detonation sensor and the air fuel ratio signal (a7) of detonation signal (a6) and linear oxygen sensors departs from more than 3% with theoretical target values, fuel combination control unit (4) checks the corner signal (a1) of CAP sensor again, the cooling water temperature signal (a2) of cooling-water temperature sensor, the intake air temperature signals (a3) of intake air temperature sensor, the boost pressure signal (a4) of air inlet pressure sensor and the throttle position signal (a5) of throttle position sensor, and regulate dimethyl ether injection signal (b1), hydrogen injection signal (b2), ignition module signal (b3) and idling motor control signal (b4), ignition internal combustion engine (5) can be worked under closed loop control.
3. the controlling method of power system of dimethyl ether/hydrogen internal combustion engine according to claim 1, it is characterized in that, in described power system, dimethyl ether tank (1) is linked by Stainless Steel Tube or nylon tube and dimethyl ether nozzle (6), hydrogen gas tank (2) is linked by Stainless Steel Tube or nylon tube and hydrogen nozzle (7), dimethyl ether tank (1) is connected with reforming dimethyl ether device controller (8) by Stainless Steel Tube or nylon tube, reforming dimethyl ether device controller (8) is connected with using waste heat from tail gas reformer (3) by Stainless Steel Tube or nylon tube, fuel combination control unit (4) is by electric wire and dimethyl ether nozzle (6), hydrogen nozzle (7), reforming dimethyl ether device controller (8), ignition module (12), idling motor (13), hydrogen gas tank pressure transducer (14), reformer temperature sensor (15), dimethyl ether pressure transducer (16) is connected.
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| WO2014196036A1 (en) * | 2013-06-05 | 2014-12-11 | トヨタ自動車株式会社 | Control device for internal combustion engine |
| CN103883414B (en) * | 2014-03-21 | 2017-09-01 | 北京工业大学 | With dimethyl ether and the electronic injector and control method of compressed natural gas |
| CN104989535B (en) * | 2015-06-08 | 2018-01-19 | 北京工业大学 | A kind of dimethyl ether internal combustion engine of mixing based on cylinder pressure lights/compression ignition control device and method |
| CN109723586B (en) * | 2019-01-28 | 2023-08-18 | 西华大学 | Solid biofuel supply device for internal combustion engine at normal temperature and normal pressure |
| CN113236454A (en) * | 2021-06-09 | 2021-08-10 | 杭州电子科技大学 | Novel engine system and injection pulse width correction method |
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