阅读说明：本技术 一种氢汽油双燃料分层燃烧转子机及其控制方法 (Hydrogen-gasoline dual-fuel layered combustion rotor machine and control method thereof ) 是由 纪常伟 常珂 汪硕峰 杨金鑫 杨振宇 于 2020-12-30 设计创作，主要内容包括：本发明设计了一种氢汽油双燃料分层燃烧转子机及其控制方法,具体涉及一种根据转子发动机转速信号调控氢气和汽油喷射策略的分层燃烧控制方法。本装置主要以转子发动机转速传感器(7)输出信号为控制依据,判断转子发动机的运转转速区间,并结合氢气及汽油缸内直喷喷嘴合理调控喷射策略,在提高进气效率的同时实现转子发动机双燃料分层燃烧,有效改善燃烧过程并兼具降低排放的效果,实现低油耗、低排放转子发动机的应用。(The invention designs a hydrogen-gasoline dual-fuel stratified combustion rotor machine and a control method thereof, and particularly relates to a stratified combustion control method for regulating and controlling a hydrogen and gasoline injection strategy according to a rotor engine rotating speed signal. The device mainly uses the output signal of the rotor engine speed sensor (7) as a control basis, judges the operating speed interval of the rotor engine, combines a reasonable regulation and control injection strategy of a direct injection nozzle in a hydrogen cylinder and a gasoline cylinder, improves the air inlet efficiency, simultaneously realizes the dual-fuel layered combustion of the rotor engine, effectively improves the combustion process, has the effect of reducing the emission, and realizes the application of the rotor engine with low oil consumption and low emission.)

1. A hydrogen gasoline dual-fuel stratified combustion rotor machine is characterized by comprising: a hydrogen injection line (P1) having thereon, in sequence: the device comprises a hydrogen storage tank (1), a hydrogen pressure reducing valve (2), a hydrogen flow regulator (3), a flame-retardant valve (4) and a hydrogen nozzle (5); a spark plug (6); a rotational speed sensor (7); -a gasoline injection line (P2) on which are successively arranged: the gasoline pump comprises a gasoline nozzle (8), a gasoline flow regulator (9), a gasoline pump (10), a gasoline filter (11) and a gasoline tank (12); an intake line (P3) having thereon, in sequence: an air cleaner (13), a throttle valve (S1); an exhaust passage (14); the ECU (15) receives the rotation speed signal f and controls a hydrogen injection signal a, a hydrogen supply flow rate signal b, a throttle opening degree signal c, a gasoline supply flow rate signal d, a gasoline injection signal e and a spark plug ignition signal g.

2. A control method of controlling the rotor machine according to claim 1, characterized in that:

a hydrogen nozzle (5), a spark plug (6) and a gasoline nozzle (8) are arranged on a cylinder body of the rotor engine, wherein the gasoline injection pressure is maintained at 14MPa +/-0.5 MPa, the gasoline nozzle (8) is arranged at the right end of a long shaft of the rotor engine and forms an included angle of 40 degrees with the long shaft, and the included angle of the gasoline nozzle ensures that gasoline fuel is injected and then diffuses towards a spark plug area, so that layered mixed gas is formed nearby the spark plug; the injection pressure of the hydrogen fuel is maintained at 5MPa +/-0.5 MPa, the hydrogen nozzle is arranged on the left side of the spark plug close to the short shaft, and the included angle between the hydrogen nozzle and the short shaft is 50 degrees, so that the hydrogen fuel is ensured to be intensively distributed in the area of the spark plug after being injected, and the ignition of the spark plug is facilitated to ignite hydrogen;

a rotor engine ECU (15) receives a rotating speed n signal of a rotating speed sensor (7);

when n is more than or equal to 0 and less than 2000rpm, pure hydrogen is adopted to drive the rotor engine to operate, and the gasoline nozzle (8) is closed, so that the flow of gasoline sprayed into the combustion chamber is 0; at the moment, the ECU (15) outputs a hydrogen injection signal a, hydrogen fuel is injected into the cylinder from the hydrogen nozzle (5) through a hydrogen injection pipeline (P1), the ECU (15) controls the end moment of hydrogen injection to be the ignition moment of the spark plug (6), and the continuous angle of hydrogen injection is an eccentric shaft angle of 50 degrees; meanwhile, the ECU (15) sends a throttle valve (S1) opening signal c to adjust the throttle valve (S1) opening, and the spark plug (6) ignites the mixed gas in the cylinder after receiving a spark plug ignition signal g sent by the ECU (15) to realize pure hydrogen operation;

when n is more than or equal to 2000 and less than 5000rpm, a hydrogen and gasoline dual-fuel injection strategy is adopted, the ECU (15) outputs a hydrogen injection signal a, hydrogen fuel is injected into the cylinder from the hydrogen nozzle (5) through a hydrogen injection pipeline (P1), the ECU (15) controls the end moment of hydrogen injection to be the ignition moment of the spark plug (6), and the continuous angle of hydrogen injection is 30 degrees of eccentric shaft angle; meanwhile, the ECU (15) sends out a gasoline injection signal e, gasoline is injected into the cylinder from the gasoline nozzle (8) through a gasoline injection pipeline (P2), the ECU (15) sends out a throttle valve (S1) opening degree signal c to adjust the opening degree of the throttle valve (S1), and the spark plug (6) ignites mixed gas in the cylinder after receiving a spark plug ignition signal g sent by the ECU (15) so as to realize layered combustion of hydrogen and gasoline dual fuels;

when n is more than or equal to 5000 and less than 8000rpm, in order to ensure that the power output improves the gasoline injection quantity, the ECU (15) controls the hydrogen injection ending moment to be the ignition moment of the spark plug (6), and the hydrogen injection continuous angle is 15 degrees of eccentric shaft angle; meanwhile, the ECU (15) sends out a gasoline injection signal e, gasoline is injected into the cylinder from a gasoline nozzle (8) through a gasoline injection pipeline (P2), the ECU (15) sends out a throttle valve (S1) opening degree signal c to adjust the opening degree of a throttle valve (S1), and the spark plug (6) ignites mixed gas in the cylinder after receiving a spark plug ignition signal g sent by the ECU (15);

when n is more than or equal to 8000rpm, the ECU (15) sends a signal to stop supplying fuel and air, and simultaneously the ECU (15) stops sending a spark plug ignition signal g to stop the rotary engine;

the equivalence ratio phi, which is the ratio of the air amount required for complete combustion of the fuel to the actually supplied air amount, is always kept at 1 throughout the operation of the rotary machine.

Technical Field

The invention designs a hydrogen-gasoline dual-fuel stratified combustion rotor machine and a control method thereof, in particular relates to a stratified combustion control method for regulating and controlling a hydrogen and gasoline injection strategy according to a rotor engine rotating speed signal, and belongs to the field of internal combustion engines.

Background

With the stricter emission regulations, the more and more intensive research on various drive types of automobiles has been conducted, and the rotary engine has gradually come into the field of vision as a drive machine different from the conventional internal combustion engine. The rotary engine has the advantages of simple structure, small volume, light weight, large power-to-weight ratio, high power density and the like, is suitable for serving as a power source to provide power for an automobile, but the tail fuel of a combustion chamber cannot be completely combusted due to the long and narrow combustion chamber structure of the rotary engine, so that the problems of low combustion efficiency, high emission and the like are caused.

The hydrogen as a clean fuel does not contain carbon element, can effectively reduce the generation of HC and CO as a blended fuel, has shorter quenching distance and wide combustion limit, and is very suitable for combustion in a rotor machine. Meanwhile, the problem that fuel at the tail part of the combustion chamber cannot be sufficiently combusted can be effectively solved by applying the stratified combustion technology to the rotary engine. The combination of hydrogen and the layered combustion technology makes up the defects of the rotary engine, improves the combustion process while improving the air inlet efficiency, and can realize the application of the rotary engine with high power output and low emission.

Based on the problems of the rotor engine and the characteristics of the hydrogen fuel and the layered combustion technology, the invention provides the hydrogen-gasoline dual-fuel layered combustion rotor engine and the control method thereof, which can realize the dual-fuel layered combustion of the rotor engine while improving the air inlet efficiency, effectively improve the combustion process, have the effect of reducing the emission and realize the application of the rotor engine with low oil consumption and low emission.

Disclosure of Invention

In order to improve the combustion process of a rotor engine and reduce the content of tail gas pollutants, the application provides a hydrogen-gasoline dual-fuel layered combustion rotor machine and a control method thereof, and particularly relates to a layered combustion control method for regulating and controlling a hydrogen and gasoline injection strategy according to a rotor engine rotating speed signal, which comprises the following steps: a hydrogen injection line P1 on which are successively provided: a hydrogen storage tank 1, a hydrogen pressure reducing valve 2, a hydrogen flow regulator 3, a flame retardant valve 4 and a hydrogen nozzle 5; a spark plug 6; a rotation speed sensor 7; a gasoline injection line P2, on which are in turn: a gasoline nozzle 8, a gasoline flow regulator 9, a gasoline pump 10, a gasoline filter 11 and a gasoline tank 12; an intake line P3 having thereon, in sequence: air cleaner 13, throttle valve S1; an exhaust passage 14; the ECU15 receives the rotation speed signal f and controls the hydrogen injection signal a, the hydrogen supply flow rate signal b, the throttle opening degree signal c, the gasoline supply flow rate signal d, the gasoline injection signal e, and the plug ignition signal g.

According to the control of the ECU15, in the hydrogen injection line P1, hydrogen is injected into the cylinder via the hydrogen storage tank 1, the hydrogen pressure reducing valve 2, the hydrogen flow regulator 3, the flame retardant valve 4, and the hydrogen nozzle 5; in the gasoline injection pipeline P2, gasoline is injected into a cylinder through a gasoline tank 12, a gasoline filter 11, a gasoline pump 10, a gasoline flow regulator 9 and a gasoline nozzle 8 after receiving a gasoline supply flow signal d sent by an ECU 15; fresh air enters the cylinder through an air inlet pipeline P3 and sequentially through an air filter 13 and a throttle valve S1; the fuel controlled by the ECU15 is sprayed into the cylinder and mixed with fresh air, ignited by the spark plug 6 and output with work, and the combustion exhaust is discharged into the atmosphere through the exhaust passage 14.

The hydrogen gasoline dual-fuel stratified combustion rotary engine comprises the following control processes:

the rotary engine ECU15 receives a rotation speed n signal of the rotation speed sensor 7:

when n is more than or equal to 0 and less than 2000rpm, pure hydrogen is adopted to drive the rotor engine to operate, and the gasoline nozzle 8 is closed, so that the flow rate of gasoline sprayed into the combustion chamber is 0; at the moment, the ECU15 outputs a hydrogen injection signal a, hydrogen fuel is injected into the cylinder from the hydrogen nozzle 5 through a hydrogen injection pipeline P1, the ECU15 controls the hydrogen injection ending time to be the ignition time of the spark plug 6, and the hydrogen injection continuing angle is 50 degrees of eccentric shaft rotation angle; meanwhile, the ECU15 sends a throttle valve S1 opening degree signal c to adjust the opening degree of the throttle valve S1, and the spark plug 6 ignites the mixed gas in the cylinder after receiving a spark plug ignition signal g sent by the ECU15, so that pure hydrogen operation is realized.

When n is more than or equal to 2000 and less than 5000rpm, a hydrogen and gasoline dual-fuel injection strategy is adopted, the ECU15 outputs a hydrogen injection signal a at the moment, hydrogen fuel is injected into the cylinder from the hydrogen nozzle 5 through a hydrogen injection pipeline P1, the ECU15 controls the hydrogen injection ending moment to be the ignition moment of the spark plug 6, and the hydrogen injection continuous angle is 30-degree eccentric shaft angle; meanwhile, the ECU15 sends out a gasoline injection signal e, gasoline is injected into the cylinder from the gasoline nozzle 8 through the gasoline injection pipeline P2, the ECU15 sends out a throttle valve S1 opening degree signal c to adjust the throttle valve S1 opening degree, and the spark plug 6 ignites mixed gas in the cylinder after receiving a spark plug ignition signal g sent by the ECU15, so that the hydrogen and gasoline dual-fuel layered combustion is realized.

When n is more than or equal to 5000 and less than 8000rpm, in order to ensure that the power output improves the gasoline injection quantity, the ECU15 controls the hydrogen injection ending time to be the ignition time of the spark plug 6, and the hydrogen injection continuous angle is 15 degrees of eccentric shaft angle; meanwhile, the ECU15 sends out a gasoline injection signal e, gasoline is injected into the cylinder from the gasoline nozzle 8 through a gasoline injection pipeline P2, the ECU15 sends out a throttle valve S1 opening degree signal c to adjust the throttle valve S1 opening degree, and the spark plug 6 ignites the mixed gas in the cylinder after receiving a spark plug ignition signal g sent by the ECU 15.

When n is more than or equal to 8000rpm, the speed is high, the rotor engine thermal load is too high, the ECU15 sends out a signal to stop the supply of fuel and air, and the ECU15 stops sending out a spark plug ignition signal g to stop the rotor engine.

The equivalence ratio phi, which is the ratio of the air amount required for complete combustion of the fuel to the actually supplied air amount, is always kept at 1 throughout the operation of the rotary machine.

The beneficial effects of the invention are mainly as follows: the invention simultaneously uses hydrogen and gasoline as the fuel of the rotor engine, hydrogen and gasoline nozzles are respectively arranged at different positions in the cylinder, and the double-fuel layered combustion in the cylinder of the rotor engine is organized by reasonably regulating and controlling the injection strategies of the hydrogen and the gasoline, thereby solving the relevant problems of the rotor engine, realizing the double-fuel layered combustion of the rotor engine, effectively improving the combustion process and having the effect of reducing the emission.

Drawings

FIG. 1 is a structural working principle diagram of the present invention

In the figure: hydrogen gas injection line P1: a hydrogen storage tank 1, a hydrogen pressure reducing valve 2, a hydrogen flow regulator 3, a flame retardant valve 4 and a hydrogen nozzle 5; a spark plug 6; a rotation speed sensor 7; gasoline injection line P2: a gasoline nozzle 8, a gasoline flow regulator 9, a gasoline pump 10, a gasoline filter 11 and a gasoline tank 12; intake pipe P3: air cleaner 13, throttle valve S1; an exhaust duct 14.

Fig. 2 is a partial structural schematic diagram of the present invention.

Detailed Description

The invention is further described with reference to the following figures and detailed description:

the method comprises the following steps: the cylinder body of the rotor engine of the device is provided with a hydrogen nozzle 5, a spark plug 6, a gasoline nozzle 8 and other components, wherein the gasoline injection pressure is maintained at 14MPa +/-0.5 MPa, the gasoline nozzle 8 is arranged at the right end of the long shaft of the rotor engine, and forms an included angle of 40 degrees with the long shaft direction, and the included angle of the gasoline nozzle can ensure that gasoline fuel is injected and then diffuses towards the spark plug area, so that layered mixed gas can be formed near the spark plug; the hydrogen fuel injection pressure is maintained at 5MPa +/-0.5 MPa, the hydrogen nozzle is arranged on the left side of the spark plug close to the short shaft, and the included angle between the hydrogen nozzle and the short shaft is 50 degrees. The rotary engine ECU15 receives a rotation speed n signal of the rotation speed sensor 7:

when n is more than or equal to 0 and less than 2000rpm, pure hydrogen is adopted to drive the rotor engine to operate, and the gasoline nozzle 8 is closed, so that the flow rate of gasoline sprayed into the combustion chamber is 0; at the moment, the ECU15 outputs a hydrogen injection signal a, hydrogen fuel is injected into the cylinder from the hydrogen nozzle 5 through a hydrogen injection pipeline P1, the ECU15 controls the hydrogen injection ending time to be the ignition time of the spark plug 6, and the hydrogen injection continuing angle is 50 degrees of eccentric shaft rotation angle; meanwhile, the ECU15 sends a throttle valve S1 opening degree signal c to adjust the opening degree of the throttle valve S1, and the spark plug 6 ignites the mixed gas in the cylinder after receiving a spark plug ignition signal g sent by the ECU15, so that pure hydrogen operation is realized.

When n is more than or equal to 2000 and less than 5000rpm, a hydrogen and gasoline dual-fuel injection strategy is adopted, the ECU15 outputs a hydrogen injection signal a at the moment, hydrogen fuel is injected into the cylinder from the hydrogen nozzle 5 through a hydrogen injection pipeline P1, the ECU15 controls the hydrogen injection ending moment to be the ignition moment of the spark plug 6, and the hydrogen injection continuous angle is 30-degree eccentric shaft angle; meanwhile, the ECU15 sends out a gasoline injection signal e, gasoline is injected into the cylinder from the gasoline nozzle 8 through the gasoline injection pipeline P2, the ECU15 sends out a throttle valve S1 opening degree signal c to adjust the throttle valve S1 opening degree, and the spark plug 6 ignites mixed gas in the cylinder after receiving a spark plug ignition signal g sent by the ECU15, so that the hydrogen and gasoline dual-fuel layered combustion is realized.

When n is more than or equal to 5000 and less than 8000rpm, in order to ensure that the power output improves the gasoline injection quantity, the ECU15 controls the hydrogen injection ending time to be the ignition time of the spark plug 6, and the hydrogen injection continuous angle is 15 degrees of eccentric shaft angle; meanwhile, the ECU15 sends out a gasoline injection signal e, gasoline is injected into the cylinder from the gasoline nozzle 8 through a gasoline injection pipeline P2, the ECU15 sends out a throttle valve S1 opening degree signal c to adjust the throttle valve S1 opening degree, and the spark plug 6 ignites the mixed gas in the cylinder after receiving a spark plug ignition signal g sent by the ECU 15.

When n is more than or equal to 8000rpm, the speed is high, the rotor engine thermal load is too high, the ECU15 sends out a signal to stop the supply of fuel and air, and the ECU15 stops sending out a spark plug ignition signal g to stop the rotor engine.

The equivalence ratio phi, which is the ratio of the air amount required for complete combustion of the fuel to the actually supplied air amount, is always kept at 1 throughout the operation of the rotary machine.