CN101666271A - Intelligent spraying system and spraying method - Google Patents

Abstract

An intelligent injection system and method, the system comprising a fuel filler cap, a fuel filler cap sensor, an ECU, a main fuel tank, a main fuel tank oil pump, a main fuel tank pressure sensor, an auxiliary fuel tank, an auxiliary fuel tank oil pump, Auxiliary fuel tank pressure sensor, control solenoid valve, high-pressure oil pump, fuel injector, can realize different injection parameters when injecting different fuels according to different fuel characteristics. It mainly obtains the fuel filling information of the gas station through wireless communication, and the ECU retrieves the corresponding information and determines the fuel injection pressure and fuel injection law during injection, and realizes the intelligent injection system that supports multiple fuel injections through the main and auxiliary fuel tanks. It can meet the demand for the common use of multiple fuels in the future.

Description

An intelligent injection system and method

technical field

The invention belongs to the field of mechatronics mechanical equipment, and relates to an intelligent fuel injection system for completing combustion of different fuels on the same engine.

Background technique

Smart Engine (Smart Engine) is a concept proposed by the academic circles for the application of alternative energy to engines, that is, to use different fuels to burn on the same engine to promote the development of alternative energy. This idea is only conceptually proposed by a small number of scientists, and its functions have not yet formed a specific, complete, and unified description. The smart fuel injection system is one of the core functional components of the Smart Engine. At present, domestic and foreign research on this aspect still stays in the blending of two fuels without changing the original injection device on the engine. For example, the use of mixed fuels of gasoline and ethanol gasoline on gasoline engines, or the transformation of traditional gasoline engines into dual-fuel engines of hydrogen/natural gas (CNG)/liquefied petroleum gas (LPG) and gasoline, and the mixing of ether or biodiesel with diesel in diesel engines use etc. Chen Hao et al. in "Research on the Performance of Gasoline-Natural Gas Dual Fuel Engines" ("Shanghai Automobile", 2008.1,) simulated the mixed combustion ratio of dual fuel engines by adjusting the pressure amplitude ratio of the intake pressure signal sensor. In the case of different blending ratios, the dynamic performance, economic performance and emission performance of the dual-fuel engine were studied. It simply vaporizes gasoline and mixes it with natural gas and injects it into the intake port. It does not set the corresponding fuel injection pressure and fuel injection timing according to the different physical and chemical characteristics of different fuels, resulting in the mixed use of different fuels. Supports injection with multiple fuels.

Contents of the invention

The purpose of the present invention is to provide an intelligent injection system and method, which can use different parameters such as injection time and pressure when injecting different fuels according to the characteristics of different fuels.

For achieving above object, the solution that the present invention adopts is:

An intelligent injection system adopts different injection parameters when implementing different fuel injections according to different fuel characteristics.

It includes a main fuel tank and at least one auxiliary fuel tank. Pressure sensors are arranged at the bottom of the main fuel tank and the auxiliary fuel tank. For fuel supply, the main fuel tank is sequentially connected to the main fuel tank oil pump, high-pressure oil pump, and fuel injector for fuel injection. It also includes an electronic control unit, which receives the signal from the pressure sensor and then controls the fuel injector, high-pressure oil pump, and main fuel tank. Oil pump, auxiliary fuel tank oil pump, valve control opening and closing and setting corresponding parameters for fuel injection and filling.

The injection system also includes a wireless communication system. When filling fuel at the gas station, the gas station simultaneously sends the type and grade information of the fuel to the injection system in a wireless manner.

A sensor is installed inside the filler cap of the auxiliary fuel tank, which senses that the auxiliary fuel tank is filled with fuel and then controls the opening of the wireless communication system.

The electronic control unit includes a signal receiving module, a signal identification module, a signal processing module, a signal output module, and a signal storage module, the signal receiving module receives the signal of the pressure sensor, and the signal identification mode compares the signal with the stored information of the information storage module The corresponding information is determined, and the signal processing module issues instructions for this processing, and the signal output module sends instructions.

The electronic control unit can also store the corresponding information of the fuel in the auxiliary fuel tank. When the main fuel tank imports fuel from the auxiliary fuel tank and injects it, the electronic control unit calls out the corresponding information of the fuel to control the injection setting parameters of the high-pressure oil pump and the injector. .

The corresponding information about the fuel in the auxiliary fuel tank in the electronic control unit is sent to the electronic control unit by the wireless communication system when it is filled with fuel.

An intelligent injection method, each type of fuel filling control computer at the gas station stores the type and grade information of the fuel, and the fuel filling information of the gas station is obtained through Bluetooth communication during the vehicle refueling process, and at the same time, the electronic control unit The type and ratio information of the fuel in the auxiliary fuel tank has been stored in the auxiliary fuel tank. When the fuel in the auxiliary fuel tank enters the main fuel tank, the electronic control unit calls the fuel type and ratio information, and sends the corresponding control strategy to each part.

Due to the adoption of the above scheme, the present invention has the following characteristics: the intelligent fuel injection system provided by the present invention can automatically change parameters such as injection pressure and injection law according to different fuel types and different combustion modes, so as to realize high-efficiency and low-emission operation of the engine. Secondly, through the cooperation of various systems of Smart Engine, the smart injector can meet the requirements of various energy-saving and environment-friendly combustion methods, such as homogeneous pre-mixed combustion, HCCI, FSI, etc.

Description of drawings

Figure 1 is a schematic diagram of the structure of an intelligent fuel injection system.

Figure 2 is a schematic diagram of the ECU structure.

Fig. 3 is a flow chart of the communication information between the gas station and the intelligent fuel tank.

1 is the main fuel tank oil pump, 2 is the main fuel tank, 3 is the main fuel tank pressure sensor, 4 is the auxiliary fuel tank pressure sensor, 5 is the auxiliary fuel tank, 6 is the auxiliary fuel tank oil pump, 7 is the control solenoid valve, 8 is the ECU, 9 is high pressure oil pump, 10 is fuel injector, 11 is fuel filler cap sensor, 12 is fuel filler cap, 13 is ECU fuel signal identification module, 14 is ECU signal receiving module, 15 is ECU signal output Modules, 16 are ECU signal processing modules, 17 are ECU information storage modules, 18 are vehicle bluetooth receivers, and 19 are bluetooth transmitters.

Detailed ways

The present invention will be further described below in conjunction with the embodiments shown in the accompanying drawings.

The present invention proposes an intelligent fuel injection system, which system includes a fuel filler cap 12, a fuel filler cap sensor 11, a bluetooth transmitter 18, a bluetooth receiver 19, an electronic control unit (ECU) 8, a main fuel tank 2. Main fuel tank oil pump 1, main fuel tank pressure sensor 3, auxiliary fuel tank 5, auxiliary fuel tank pressure sensor 4, auxiliary fuel tank oil pump 6, control solenoid valve 7, high pressure oil pump 9 and fuel injector 10. The fuel filler cap sensor 11 is installed inside the fuel tank filler cap 12 and connected to the ECU 8 through an electrical connection. The main fuel tank 2 and the auxiliary fuel tank 5 are placed in parallel from left to right, the main fuel tank oil pump 1 is placed above the main fuel tank 2 , and the auxiliary fuel tank oil pump 6 is placed above the auxiliary fuel tank 5 . The main fuel tank 2 and the auxiliary fuel tank 5 are connected by a pipeline, and a control solenoid valve 7 is arranged in the middle of the pipeline to control whether the pipeline between the auxiliary fuel tank 5 and the main fuel tank 2 is unimpeded. The main fuel tank pressure sensor 3 is installed at the bottom of the main fuel tank 2, and the auxiliary fuel tank pressure sensor 4 is installed at the bottom of the auxiliary fuel tank 5 to detect the fuel amounts in the main fuel tank 2 and the auxiliary fuel tank 5 respectively. The main fuel tank pressure sensor 3 and the auxiliary fuel tank pressure sensor 4 are electrically connected to the ECU 8 . The high-pressure oil pump 9 is installed above the main fuel tank 2, the inlet end is connected with the main fuel tank 2 through a pipeline, and the outlet end is connected with the fuel injector 10 located at the front end of the high-pressure oil pump 9 through a pipeline. The ECU8 is electrically connected to the main fuel tank pressure sensor 3, the auxiliary fuel tank pressure sensor 4, the main fuel tank oil pump 1, the auxiliary fuel tank oil pump 6, the control solenoid valve 7, the high pressure oil pump 9, and the fuel injector 10 through wires. , so that the ECU receives and sends control signals to control the above components. The ECU 8 is composed of an ECU fuel signal identification module 13 , an ECU signal processing module 16 , an ECU signal receiving module 14 , an ECU signal output module 15 and an ECU information storage module 17 . The smart fuel tank installs the Bluetooth receiving device 18 at the gas station. When the car enters the gas station for fuel filling, the ECU 8 receives the signal from the sensor 11 on the fuel filler cap when the fuel filler cap 12 is opened. Know that the auxiliary fuel tank 5 is opened, send a signal to the vehicle-mounted Bluetooth transmitter 19, automatically turn on the vehicle-mounted Bluetooth transmitter 19, and receive the signal sent by the gas station Bluetooth receiver 18, the signal is preset by the gas station controller and can be composed of 8-bit codes , the first four digits determine the fuel type, such as gasoline 0000, diesel 0001, biodiesel 0002, etc., and the last four digits determine the fuel grade, such as No. 90 gasoline is 0000, No. 93 is 0001, that is, if the filling is No. 90 Gasoline bluetooth receiving device 18 sends code 00000000. After the bluetooth transmitting device 19 receives the signal, it is transmitted to the ECU 8 by an electric signal, and the ECU information receiving module 14 will obtain the electric signal, and pass the electric signal into the ECU fuel identification module 13 through the circuit, and the ECU fuel identification module 13 will input the signal with the ECU information storage module 17. Compare the stored information to determine the type and grade of fuel, and then input the control electrical signals corresponding to different types and grades of fuel into the ECU signal processing module 16, and the ECU signal processing module 16 converts the input signal into a corresponding control module signal through the circuit The connection is transmitted to the ECU signal output module 15, and the ECU signal output module 15 transmits the signal to each control mechanism through wires. The high-pressure oil pump 9 determines the pump oil pressure according to the ECU8 control electrical signal input from the wire; the fuel injector 10 determines the fuel injection time, needle valve lift and other fuel injection parameters according to the control electrical signal sent by the ECU8. Therefore, different fuel injection methods and fuel injection strategies are adopted for different fuel physical and chemical characteristics to achieve the best fuel injection effect. When the engine is running, the required fuel is supplied by the main fuel tank 2; the fuel filled by the gas station is first stored in the auxiliary fuel tank 5, and when the fuel in the main fuel tank 2 is about to be consumed completely, the main fuel tank pressure sensor 3 sends a signal through the wire To the ECU8, the ECU8 first judges whether the fuel quantity signal sent by the auxiliary fuel tank pressure sensor 4 is 0, if it is 0, it shows that no other fuel is loaded in the auxiliary fuel tank 5 at this time, and the ECU8 sends a signal to remind the driver that the fuel is about to run out , need to add fuel. If it is not 0, it indicates that another kind of fuel is housed in the auxiliary fuel tank 5 at this time, and after judgment, the ECU 8 feeds back the control solenoid valve 7 and the auxiliary fuel tank oil pump 6 through electric signals. After the control solenoid valve 7 receives the signal transmitted by the ECU8, it is energized to open the valve, so that the pipeline between the main fuel tank 2 and the auxiliary fuel tank 5 is unblocked, and the auxiliary fuel tank oil pump 6 starts the pump after receiving the electric signal output by the ECU8 pump the fuel in the auxiliary fuel tank 5 into the main fuel tank 2, when the fuel in the auxiliary fuel tank 5 is evacuated, the auxiliary fuel tank pressure sensor 4 transmits a signal to the ECU 8 through a wire, and after the ECU 8 receives the signal, respectively The electrical signal is fed back to the control solenoid valve 7 and the auxiliary fuel tank oil pump 6, the control solenoid valve 7 is closed, the pipeline between the main fuel tank 2 and the auxiliary fuel tank 5 is cut off, and the auxiliary fuel tank oil pump 6 is closed. At the same time, ECU 8 sends control signals to high-pressure oil pump 9 and fuel injector 10 according to the fueling information obtained at the gas station. Type maintains optimal working condition.

In the injection method of the present invention, each type of fuel filling control computer at the gas station stores information such as the type and grade of the fuel, and the fuel filling information of the gas station is obtained through Bluetooth communication during the automobile refueling process. The fuel type and ratio information stored in the auxiliary fuel tank, when the fuel in the auxiliary fuel tank enters the main fuel tank, the ECU calls the fuel type and ratio information, and sends the corresponding control strategy to each component.

The intelligent fuel injection system provided by the present invention can automatically change parameters such as injection pressure and injection law according to different fuel types and different combustion modes, so as to realize high-efficiency and low-emission operation of the engine. Secondly, through the cooperation of various systems of Smart Engine, the smart injector can meet the requirements of various energy-saving and environment-friendly combustion methods, such as homogeneous pre-mixed combustion, HCCI, FSI, etc. The future application prospect is very broad.

The above description of the embodiments is for those of ordinary skill in the art to understand and apply the present invention. It is obvious that those skilled in the art can easily make various modifications to these embodiments, and apply the general principles described here to other embodiments without creative efforts. Therefore, the present invention is not limited to the embodiments herein, and improvements and modifications made by those skilled in the art according to the disclosure of the present invention should fall within the protection scope of the present invention.

Claims (8)

1, a kind of intelligent ejecting system is characterized in that: it adopts different nozzle parameters when realizing that according to the different fuel characteristic different fuel sprays.

2, intelligent ejecting system as claimed in claim 1, it is characterized in that: it comprises a main fuel tank, at least one auxilliary fuel tank, be provided with pressure transducer at the bottom of the case of main fuel tank and auxilliary fuel tank, be communicated with between main fuel tank and the auxilliary fuel tank by valve control and by auxilliary fuel tank oil pump for fuel, main fuel tank connects the main fuel tank oil pump successively, high pressure oil pump, oil sprayer carries out fuel and sprays, it also comprises electronic control unit, and electronic control unit receives the signal of pressure transducer and then to oil sprayer, high pressure oil pump, the main fuel tank oil pump, auxilliary fuel tank oil pump, valve control opens and closes and sets relevant parameter and carries out the injection and the filling of fuel.

3, intelligent ejecting system as claimed in claim 2, it is characterized in that: described ejecting system also comprises wireless communication system, it is when gas station's fueling, and the kind and the class information of the fuel that the gas station will annotate simultaneously send to ejecting system by wireless mode.

4, intelligent ejecting system as claimed in claim 3 is characterized in that: the filler lid inside of its auxilliary fuel tank is equipped with sensor, and induction is opened auxilliary fuel tank filler fuel and then control wireless communication system.

5, intelligent ejecting system as claimed in claim 2, it is characterized in that: described electronic control unit comprises signal receiving module, signal identification module, signal processing module, signal output module, signal storage module, signal receiving module receives the signal of pressure transducer, the signal recognition mode compares definite corresponding information with the stored information of this signal and information storage module, and by signal processing module to the instruction of getting a haircut out herein, send instruction by signal output module.

6, intelligent ejecting system as claimed in claim 5, it is characterized in that: the corresponding information of fuel in the auxilliary fuel tank of described electronic control unit storage, main fuel tank is when auxilliary fuel tank imports fuel and spray, and electronic control unit accesses the injection setup parameter of this fuel corresponding information control high pressure oil pump, sparger.

7, intelligent ejecting system as claimed in claim 6 is characterized in that: the corresponding information of fuel in the auxilliary fuel tank in the described electronic control unit is sent to electronic control unit by wireless communication system by to its fueling the time.

8, a kind of intelligent injection method, it is characterized in that: the every kind of fuel filling controlling computer in gas station all stores the kind and the class information of this fuel, in the automobile fuel filler process, obtain the fuel up information of gas station by the mode of bluetooth communication, the type and the proportioning information of service tank intermediate fuel oil in electronic control unit, have been deposited simultaneously in, after the fuel oil in the service tank enters main fuel tank, electronic control unit calls this fuel oil type and proportioning information, and corresponding control strategy sends to each parts with it.

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