CN212898721U

CN212898721U - Oil-gas mixed dual-fuel engine electric control system

Info

Publication number: CN212898721U
Application number: CN202021074709.3U
Authority: CN
Inventors: 周继光; 邹晓明
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-06-12
Filing date: 2020-06-12
Publication date: 2021-04-06
Anticipated expiration: 2030-06-12

Abstract

The utility model discloses an oil-gas mixing dual-fuel engine electric control system, belonging to an engine fuel control system; aims to provide an electric control system capable of accurately controlling the oil-gas ratio of an engine. The engine comprises an air supply system and an oil supply system which are communicated with the engine; the gas supply system consists of an electromagnetic valve (2), a first flow sensor (3), a regulating valve (4) and a gas nozzle (5) which are sequentially communicated, and the oil supply system consists of an oil sprayer (7) communicated with a combustion chamber of an engine (6), a second flow sensor (9) and a third flow sensor (8) which are correspondingly connected to an oil inlet pipeline and an oil return pipeline of the oil sprayer; the electromagnetic valve (2), the first flow sensor (3), the regulating valve (4), the fuel injector (7), the second flow sensor (9) and the third flow sensor (8) are respectively and electrically connected with the ECU (13), and a rotating speed sensor and an exhaust temperature sensor on the engine (6) are respectively and electrically connected with the ECU (13).

Description

Oil-gas mixed dual-fuel engine electric control system

Technical Field

The utility model relates to an engine fuel control system especially relates to an engine electric control system for controlling fuel, gas mixing ratio.

Background

At present, an oil-gas mixing dual-fuel engine is usually formed by modifying a fuel engine, and the modification technical route is to add a set of fuel gas supply system on the fuel engine and adjust the oil-gas mixing ratio through a control device. The oil-gas mixed combustion engine has the advantages of less change to the original structure and easy realization. The fuel control system of the engine takes the ideal rotating speed and the accelerator position of the engine under several specific working conditions as set values, converts parameters collected by a rotating speed sensor and an accelerator sensor into electric signals and transmits the electric signals to a control unit, and the control unit compares the parameters with the set values and then adjusts and controls the accelerator and a fuel gas injection valve so as to realize the reasonable proportion of fuel oil and fuel gas. When an automobile is under an overload condition, particularly after an engine is used for a period of time and mechanical wear and power curve changes are generated, parameters such as the actual rotating speed and the actual accelerator position of the engine in a dual-fuel mode deviate from set values under corresponding working conditions, so that the oil supply quantity corresponding to the actual position of the accelerator and the actual rotating speed of the engine and the oil supply quantity corresponding to the set position of the accelerator and the set rotating speed of the engine under the same conditions are greatly changed, the supply ratio of fuel oil and gas and the control precision of the total fuel consumption are reduced, and the aims of stabilizing the engine power, improving the fuel economy and reducing the exhaust emission are not achieved.

Disclosure of Invention

The above-mentioned defect to prior art exists, the utility model aims at providing one kind through accurate control oil-gas ratio to reduce oil consumption, stabilize the oil-gas mixture dual fuel engine electric control system of engine power.

In order to achieve the purpose, the invention adopts the following technical scheme: the engine comprises an air supply system and an oil supply system which are communicated with the engine; the gas supply system is composed of an electromagnetic valve, a first flow sensor, a regulating valve and a gas nozzle which are sequentially communicated, and the gas nozzle is communicated with a combustion chamber of the engine; the oil supply system is composed of an oil sprayer communicated with a combustion chamber of the engine, a second flow sensor connected to an oil inlet pipeline of the oil sprayer and a third flow sensor connected to an oil return pipeline of the oil sprayer; the electromagnetic valve, the first flow sensor, the regulating valve, the oil injector, the second flow sensor and the third flow sensor are respectively and electrically connected with the ECU, and a rotating speed sensor and an exhaust temperature sensor on the engine are respectively and electrically connected with the ECU.

A gas filter is connected to the gas supply pipeline at the front end of the electromagnetic valve, and a fuel filter is connected to the oil inlet pipeline at the front end of the second flow sensor.

Compared with the prior art, the utility model adopts the technical proposal that the rotating speed sensor and the exhaust temperature sensor are utilized to collect the current working state information (rotating speed and exhaust temperature) of the engine, and the flow sensor is utilized to collect the current oil supply and air supply respectively; the ECU compares the current oil-gas ratio, the engine rotating speed and the exhaust temperature with the set oil-gas ratio, the corresponding rotating speed and the exhaust temperature, and if the two groups of data are deviated, the ECU respectively sends out action instructions to the regulating valve and the oil injector electromagnetic valve to regulate and correct the air supply quantity and the oil supply quantity in real time, so that the fuel oil and natural gas are always in the optimal ratio state.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure: the fuel gas injection device comprises a gas filter 1, an electromagnetic valve 2, a first flow sensor 3, a regulating valve 4, a gas nozzle 5, an engine 6, an oil injector 7, a third flow sensor 8, a second flow sensor 9, a fuel oil filter 10, a fuel tank 11, a gas bottle 12 and an ECU 13.

Detailed Description

The invention will be further described with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1: the air supply system and the oil supply system are respectively communicated with a combustion chamber of the engine 6. Wherein, the gas supply system comprises solenoid valve 2 with gas bottle 12 intercommunication, the first flow sensor 3 with this solenoid valve intercommunication, governing valve 4 with this first flow sensor intercommunication, gas nozzle 5 with this governing valve intercommunication, and this gas nozzle communicates with the combustion chamber of engine 6. The oil supply system is composed of an oil injector 7 communicated with a combustion chamber of the engine 6, a second flow sensor 9 connected to an oil inlet pipeline between the oil injector and the fuel tank 11, and a third flow sensor 8 connected to an oil return pipeline between the oil injector 7 and the fuel tank 11.

The electromagnetic valve 2, the first flow sensor 3, the regulating valve 4, the fuel injector 7, the second flow sensor 9 and the third flow sensor 8 are respectively electrically connected with the ECU 13; in order to collect the operating state information of the engine 6, the engine is provided with a rotation speed sensor, a water temperature sensor, an oil pressure sensor, and an exhaust gas temperature sensor (all not shown) electrically connected to the ECU 13.

In order to ensure the cleanness of the fuel entering the engine 6, a gas filter 1 is connected to a gas supply pipeline at the front end of the electromagnetic valve 2, and a fuel filter 10 is connected to a fuel inlet pipeline at the front end of the second flow sensor 9.

Claims

1. An electric control system of an oil-gas mixed dual-fuel engine comprises an air supply system and an oil supply system which are communicated with the engine; the method is characterized in that:

the gas supply system is composed of an electromagnetic valve (2), a first flow sensor (3), a regulating valve (4) and a gas nozzle (5) which are sequentially communicated, and the gas nozzle (5) is communicated with a combustion chamber of an engine (6);

the oil supply system is composed of an oil sprayer (7) communicated with a combustion chamber of the engine (6), a second flow sensor (9) connected to an oil inlet pipeline of the oil sprayer and a third flow sensor (8) connected to an oil return pipeline of the oil sprayer (7);

the electromagnetic valve (2), the first flow sensor (3), the regulating valve (4), the fuel injector (7), the second flow sensor (9) and the third flow sensor (8) are respectively and electrically connected with the ECU (13), and a rotating speed sensor and an exhaust temperature sensor on the engine (6) are respectively and electrically connected with the ECU (13).

2. The electric oil-gas hybrid dual-fuel engine control system according to claim 1, characterized in that: a gas filter (1) is connected to a gas supply pipeline at the front end of the electromagnetic valve (2), and a fuel filter (10) is connected to a fuel inlet pipeline at the front end of the second flow sensor (9).