CN202867005U

CN202867005U - Novel automatic dual-fuel controller

Info

Publication number: CN202867005U
Application number: CN2012205051097U
Authority: CN
Inventors: 高建华; 华旸
Original assignee: MAANSHAN PUYOU ELECTRONIC TECHNOLOGY Co Ltd
Current assignee: MAANSHAN PUYOU ELECTRONIC TECHNOLOGY Co Ltd
Priority date: 2012-09-29
Filing date: 2012-09-29
Publication date: 2013-04-10
Anticipated expiration: 2022-09-29

Abstract

A novel automatic dual-fuel controller comprises a shell body, a control circuit, an auxiliary toggle switch, an auxiliary potentiometer, a buzzer, an connection insertion piece, a light emitting diode (LED) lamp and a mode control switch. The control circuit is installed in the shell body and used for sampling of input signals and achieving the dual-fuel control function according to a current control mode. The buzzer is used for reminding a driver that a gasoline mode can be switched to a gas mode. The connection insertion piece is installed on the tail portion of the shell body. The Led lamp is installed on the outer portion at the front end of the shell body and used for displaying current gas remains and current fuel to be gasoline or gas. The mode control switch is used by the driver to choose a current working mode. Compared with a traditional dual-fuel controller, the novel automatic dual-fuel controller has the function of a manual controller, and achieves an automatic switchover of the fuel modes according to command judgment of cooling water temperature and electronic control unit (ECU) fuel injection pulse width. The novel automatic dual-fuel controller is effective and simple, high in reliability and low in cost, and a project is easy to achieve.

Description

A kind of novel automatic dual-fuel controller

Technical field

The utility model belongs to the new-energy automobile field, is specifically related to a kind of novel double fuel control technique.

Background technique

In the day by day serious situation of current energy crisis and environmental pollution, gas combustion automobile since its have the fuel saving expense, cut operating costs, environment protection effect is better, Security advantages of higher more, has obtained extensive concern.Combustion gas/gasoline dual fuel engine, repacking is convenient, price is lower; And have both the advantage of gas combustion automobile and regular price gasoline car, possess good power character, emission performance; Can realize according to actual conditions the switching of combustion gas, gasoline mode; It is a kind of effective solution.Existing combustion gas/gasoline double-fuel controller mostly is greatly personal control, needs the driver manually to determine current fuel mode, is difficult to take full advantage of the performance of dual-fuel automobile; Perhaps complex structure, cost is higher.

Summary of the invention

The purpose of this utility model is that a kind of novel automatic dual-fuel controller is provided in order to overcome the above problems, and satisfies the automatic switching function of combustion gas/gasoline double-fuel control, simultaneously to the least possible change of existing small passenger car.

The technical solution of the utility model is achieved like this: a kind of novel automatic dual-fuel controller is characterized in: it comprises housing, be loaded on the control circuit that realization is sampled to input signal and realized double fuel control function according to current control mode that is used in the housing, auxiliary toggle switch, auxiliary potentiometer, be used for the buzzer that the prompting driver can switch to from the gasoline pattern combustion gas pattern, be loaded on the connector assembly of housing afterbody, be loaded on housing front end outside be used for show that current combustion gas surplus and current fuel are the LED lamp of gasoline or combustion gas, select the mode control switch of work at present pattern for the driver; Described control circuit comprises that 5V power circuit, single chip circuit, flash drive circuit, fuel injection pulsewidth catch the AD sample circuit of sample circuit, combustion gas surplus, cooling water temperature signal sample circuit; It is resistance mode or voltage mode input that described auxiliary toggle switch is used for selecting the input pattern of combustion gas residual signal; Described auxiliary toggle switch and auxiliary potentiometer one are used from the threshold value of regulating the sampling of single-chip microcomputer fuel injection pulsewidth; Described connector assembly is for the signal input of the sampling of combustion gas residual signal, fuel injection pulsewidth sampling, cooling water temperature sampling, and the signal output of controlling outside igniting advancing device, snifting valve, simulation oil sprayer.

The utility model is compared with the traditional double fuel-control unit, has possessed the function of personal control, and can according to cooling water temperature and the instruction of ECU fuel injection pulsewidth are judged, realize the automatic switchover of fuel mode; The utility model is simple effectively, reliability is high, with low cost and be easy to Project Realization.

Description of drawings

Fig. 1 is structural representation of the present utility model.

Fig. 2 is the processing circuit of mode control switch.

Fig. 3 is the flash drive circuit.

Fig. 4 is the AD sample circuit of combustion gas surplus.

Fig. 5 is the cooling water temperature signal sample circuit.

Fig. 6 is the drive circuit of buzzer.

Fig. 7 is that fuel injection pulsewidth is caught sample circuit.

1---control circuit 2---auxiliary toggle switch 3---auxiliary potentiometer 4---buzzer 5---connector assembly 6---LED lamp 7---mode control switch S1---mode control switch R1 ~ R19---resistance C1 ~ C9---electric capacity U1---flash driving chip BTS724 U2---phase inverter MC74HC1G04 K1---internal relay TX2-DC12V D1A among the figure, D1B, D2B, D3A, D3B---diode B1---buzzer Q1---PNP triode

Embodiment

The utility model does not need to change to parts such as the control unit of engine of existing gasoline vehicle, oil circuits; By dual-fuel controller, realize the control of fuel oil pattern, and realize the control to electronic spark advance regulator, simulation oil sprayer, snifting valve.

As seen from Figure 1: the utility model comprises square casing, is loaded on the control circuit 1 in the housing, auxiliary toggle switch 2, auxiliary potentiometer 3, buzzer 4, the connector assembly 5 of housing afterbody, LED lamp 6 and the mode control switch 7 of housing front end outside.

Control circuit 1 comprises that power supply LM78M05 circuit, single-chip microcomputer PIC16F722 circuit, the flash flash drive circuit that forms that drives chip U1 (BTS724), the fuel injection pulsewidth that phase inverter U2 (MC74HC1G04) forms catch sample circuit, internal relay K1(TX2-DC12V) the AD sample circuit of the combustion gas surplus that forms, cooling water temperature signal sample circuit etc., be used for realizing to the input signal sampling, and realize double fuel control function according to current control mode.

Auxiliary toggle switch 2 is regulated the threshold value of single-chip microcomputer PIC16F722 fuel injection pulsewidth sampling with auxiliary potentiometer 3; It is resistance mode or voltage mode that the auxiliary toggle switch 2 of adjusting can be selected the input pattern of combustion gas residual signal.

Buzzer 4 is used for the prompting driver, can switch to the combustion gas pattern from the gasoline pattern.

Connector assembly 5 is used for realizing the signal input of the sampling of combustion gas residual signal, fuel injection pulsewidth sampling, cooling water temperature sampling; And the signal output of control outside light a fire advancing device, snifting valve, simulation oil sprayer.

LED lamp 6 is used for showing current combustion gas surplus, and current fuel is gasoline or combustion gas.

Mode control switch 7 is selected the work at present pattern for the driver.As shown in Figure 2, when driver's toggle switch S1 was mode control switch 7 among Fig. 1, processing circuit can collect level to be changed, and sends into IO port RA0 and the RA1 of single-chip microcomputer PIC16F722; Single-chip microcomputer PIC16F722 judges the work at present pattern accordingly.Specifically comprise three kinds of patterns: force fuel oil pattern, reinforced fuel gas pattern, automatic mode.

When switch S 1 turn on-switch 3 ends namely pushed pressure fuel oil pattern, this moment, the energy source of vehicle was gasoline.When single-chip microcomputer PIC16F722 collects RA0 and is high level, judge that work at present forcing the fuel oil pattern, and light the fuel oil status lamp.As shown in Figure 3, single-chip microcomputer PIC16F722 output signal RA2, RA3, RA4, deliver to respectively three input ends that flash drives U1 integrated package BTS724, control respectively the output that flash drives three output terminal OUT1, OUT2 and the OUT3 of U1 integrated package BTS724, electronic spark advance device, snifting valve and simulation oil sprayer are all quit work, and motor uses gasoline to carry out work.The AD sample circuit of combustion gas surplus as shown in Figure 4; Regulate auxiliary toggle switch 2, the level state of outside input IN2 will change, internal relay TX2-DC12V is that the K1 among Fig. 4 will move, and will change the RA6 pin level of input single-chip microcomputer, thereby identification is resistance type combustion gas signal or voltage type combustion gas signal.When the combustion gas signal IN1 of input was resistance type, the IO pin RA6 of single-chip microcomputer PIC16F722 collected low level; When the combustion gas signal was voltage-type, the IO pin RA6 of single-chip microcomputer PIC16F722 collected high level.During resistance mode, combustion gas signal and resistance R 10 dividing potential drops after eliminator is processed, are sent into the AD pin RA5 of single-chip microcomputer PIC16F722, and single-chip microcomputer PIC16F722 calculates current combustion gas surplus, and lights accordingly the LED of different numbers according to the result of AD sampling.When the combustion gas signal was voltage type, combustion gas signal IN1 sent into the RA5 of single-chip microcomputer PIC16F722 after filtering, and single-chip microcomputer PIC16F722 calculates current combustion gas surplus according to sampled result, and lighted accordingly the LED lamp 6 of different numbers.

Under the reinforced fuel gas pattern, the energy source of vehicle is combustion gas.When switch S 1 turn on-switch 1 end among Fig. 2, single-chip microcomputer PIC16F722 collect input pin RA1 and be high level, judge work at present in the reinforced fuel gas pattern, and light the combustion gas status lamp, its working procedure with force the fuel oil state class seemingly.In Fig. 3, single-chip microcomputer PIC16F722 output signal RA2, RA3, RA4, control respectively flash and drive three output terminal OUT1, the OUT2 of U1 integrated package BTS724 and the output of OUT3, make electronic spark advance device, snifting valve and simulation oil sprayer all in running order, motor uses combustion gas to carry out work.Single-chip microcomputer PIC16F722 calculates current combustion gas surplus according to the combustion gas balance information that the RA5 among Fig. 4 collects, and lights accordingly the LED lamp 6 of different numbers.

Under the automatic mode, the energy source of vehicle may be fuel oil or combustion gas.When the switch S 1 among Fig. 2 is unsettled when disconnecting any end points, when single-chip microcomputer PIC16F722 collects RA0 and RA1 and is low level, judge that work at present is at automatic mode.Under the automatic mode, judge at first whether last control mode is the reinforced fuel gas pattern, if so, show that the driver tends to be operated in the combustion gas pattern.As shown in Figure 5, cooling water temperature signal IN3 is after filtering is processed, send into the AD passage RA7 of single-chip microcomputer PIC16F722, when single-chip microcomputer PIC16F722 judges cooling water temperature and reaches predefined value, vehicle with automatic operation in the combustion gas pattern, combustion gas LED lamp is bright, single-chip microcomputer PIC16F722 drives the three output terminal OUT1 of chip BTS724 by flash, the output of OUT2 and OUT3, make the electronic spark advance device, snifting valve and simulation oil sprayer are all in running order, and the combustion gas balance information that collects according to the output RA5 end of the AD sample circuit of combustion gas surplus, by the LED lamp 6 of how much lighting different numbers of combustion gas surplus, show the combustion gas balance information.If single-chip microcomputer PIC16F722 judges that cooling water temperature does not reach predefined value, vehicle will work in the fuel oil pattern, single-chip microcomputer PIC16F722 lights fuel oil LED lamp 6, and three output terminal OUT1, the OUT2 of control flash drive circuit BTS724 and the output of OUT3, electronic spark advance device, snifting valve and simulation oil sprayer are quit work, and according to the combustion gas balance information of RA5 passage, light the LED lamp 6 of different numbers.

Under the automatic mode, if last control mode is not the reinforced fuel gas pattern, then need to switch to the reinforced fuel gas pattern behind the driver certifying.Single-chip microcomputer PIC16F722 is at first according to the cooling water temperature sample circuit, judge whether cooling water temperature reaches predefined value: if do not reach, vehicle will work in the fuel oil pattern: single-chip microcomputer PIC16F722 lights fuel oil LED lamp 6, control the output of three output terminal OUT1, OUT2 and OUT3 by flash drive circuit BTS724, electronic spark advance device, snifting valve and simulation oil sprayer are quit work, and the combustion gas balance information lightening LED lamp 6 that collects according to the RA5 passage.If cooling water temperature reaches predefined value, single-chip microcomputer passes through the drive circuit of buzzer as shown in Figure 6, and B1 intermittently rings by RA8 pin control buzzer, switches thereby reminding driver carries out state.When the driver opened the throttle, original engine electronic control unit can increase fuel injection pulsewidth; Catch shown in the sample circuit such as Fig. 7 fuel injection pulsewidth, fuel injection pulsewidth signal IN4 catches after Acquisition Circuit processes through of the present utility model, and input single-chip microcomputer PIC16F722 catches passage RA9; When the software among the single-chip microcomputer PIC16F722 is judged the fuel injection pulsewidth increase of original engine electronic control unit and surpassed setting threshold, judge work at present in the combustion gas pattern, single-chip microcomputer PIC16F722 lights combustion gas LED lamp 6, stops buzzer B1 and rings; Single-chip microcomputer PIC16F722 drives chip BTS724 by flash, and three output terminal OUT1, the OUT2 that the control flash drives and the output of OUT3 make electronic spark advance device, snifting valve and simulation oil sprayer all in running order; And according to the combustion gas balance information that the RA5 passage collects, light the LED lamp 6 of different numbers, show the combustion gas balance information.

Claims

1. novel automatic dual-fuel controller is characterized in that: it comprises housing, be loaded on being used in the housing realize to the input signal sampling and according to current control mode realize the control circuit of double fuel control function, auxiliary toggle switch, auxiliary potentiometer, be used for the prompting driver can from the gasoline pattern switch to the combustion gas pattern buzzer, be loaded on the housing afterbody connector assembly, be loaded on housing front end outside be used for show current combustion gas surplus and current fuel be gasoline or combustion gas the LED lamp, supply the driver to select the mode control switch of work at present pattern; Described control circuit comprises that 5V power circuit, single chip circuit, flash drive circuit, fuel injection pulsewidth catch the AD sample circuit of sample circuit, combustion gas surplus, cooling water temperature signal sample circuit; It is resistance mode or voltage mode input that described auxiliary toggle switch is used for selecting the input pattern of combustion gas residual signal; Described auxiliary toggle switch and auxiliary potentiometer one are used from the threshold value of regulating the sampling of single-chip microcomputer fuel injection pulsewidth; Described connector assembly is for the signal input of the sampling of combustion gas residual signal, fuel injection pulsewidth sampling, cooling water temperature sampling, and the signal output of controlling outside igniting advancing device, snifting valve, simulation oil sprayer.

2. a kind of novel automatic dual-fuel controller according to claim 1 is characterized in that: described mode control switch has three kinds of mode of operations to select: force fuel oil pattern, reinforced fuel gas pattern, automatic mode.

3. a kind of novel automatic dual-fuel controller according to claim 1 and 2, it is characterized in that: described control circuit by single-chip microcomputer (PIC16F722) as control core, single-chip microcomputer is by the mode instruction of IO pin drainage pattern control switch, gather the toggle switch state, gather cooling water temperature, combustion gas residual signal, auxiliary potentiometer state by the AD pin, gather fuel injection pulsewidth signal by catching pin; Single-chip microcomputer drives chip output according to algorithm by IO pin control flash, and the control buzzer is rung working state and combustion gas surplus LED lamp.

4. a kind of novel automatic dual-fuel controller according to claim 3, it is characterized in that: when mode control switch is in automatic mode, obtain cooling water temperature by single-chip microcomputer by temperature sampling circuit, obtain the fuel injection pulsewidth of original engine electronic control unit by capture circuit, by buzzer prompting driver, opened the throttle by the driver, make the fuel injection pulsewidth increase of original engine electronic control unit and surpass setting threshold, automatically realize the switching from the fuel oil pattern to the combustion gas pattern; When being the reinforced fuel gas pattern such as last round of pattern, only needing cooling water temperature to reach setting value and will enter the reinforced fuel gas pattern.