CN203670012U - Natural gas and gasoline double-fuel controller - Google Patents
Natural gas and gasoline double-fuel controller Download PDFInfo
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- CN203670012U CN203670012U CN201420021819.1U CN201420021819U CN203670012U CN 203670012 U CN203670012 U CN 203670012U CN 201420021819 U CN201420021819 U CN 201420021819U CN 203670012 U CN203670012 U CN 203670012U
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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
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- Y02T10/30—Use of alternative fuels, e.g. biofuels
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Abstract
The utility model provides a natural gas and gasoline double-fuel controller. The controller comprises a microcontroller, a power circuit, a reset circuit, an amplifying circuit, a zero cross detection circuit, a low-pass filtering circuit, a pi-shaped filtering circuit, an RS-232 level switching circuit, a K-line interface circuit, a CAN bus interface circuit, an LIN bus interface circuit, a low side drive circuit, a high side drive circuit, a Darlington drive circuit, a memory chip circuit and a drive circuit based on an SPI, wherein the power circuit, the reset circuit, the amplifying circuit, the zero cross detection circuit, the low-pass filtering circuit, the pi-shaped filtering circuit, the RS-232 level switching circuit, the K-line interface circuit, the CAN bus interface circuit, the LIN bus interface circuit, the low side drive circuit, the high side drive circuit, the Darlington drive circuit, the memory chip circuit and the drive circuit based on the SPI are respectively connected with the microcontroller. According to the natural gas and gasoline double-fuel controller, the modular circuits are adopted, so that new functions can be conveniently expanded; the natural gas and gasoline double-fuel controller is compatible with all four kinds of current communication interfaces, communication with various external systems is convenient, the interfaces are convenient to use, and the reliability is high; the technical problems that by the adoption of a traditional natural gas and gasoline double-fuel controller, a driver needs to confirm the current fuel mode manually, and the performance of a double-fuel automobile is difficult to utilize fully are solved.
Description
Technical field
The utility model belongs to automotive engine control field, particularly a kind of rock gas and gasoline double-fuel controller.
Background technique
In current energy crisis and environmental pollution day by day serious in the situation that, gas combustion automobile, because it has fuel saving expense, cuts operating costs, environment protection effect is better, more advantages of higher of Security, gets the attention.Combustion gas/gasoline dual fuel engine, repacking is convenient, price is lower; And the advantage that has both gas combustion automobile and regular price gasoline car, possesses good power character, emission performance; Can realize according to actual conditions the switching of combustion gas, gasoline mode.Existing combustion gas/gasoline double-fuel controller, is mostly personal control, needs driver manually to determine current fuel mode, is difficult to make full use of the performance of dual-fuel automobile.
Model utility content
For solving the problems of the technologies described above, the problem that the utility model solves is to provide a kind of dual-fuel controller of the oil and gas pattern that can automatically switch.
To achieve these goals, the technical solution adopted in the utility model is: described dual-fuel controller comprises: microcontroller and the power circuit being connected with described microcontroller respectively, reset circuit, amplification circuit, zero cross detection circuit, low-pass filter circuit, π type eliminator, RS-232 electrical level conversion circuit, K line interface circuit, CAN bus interface circuit, LIN bus interface circuit, low limit drive circuit, flash drive circuit, Darlington transistor drive circuit, memory chip and the drive circuit based on SPI interface; Described power circuit is for providing operating voltage to whole dual-fuel controller; Described reset circuit is for providing reset signal to microcontroller; Described amplification circuit is used for outputing to microcontroller from each sensor read signal of automobile and being amplified; Described zero cross detection circuit is used for reading sine wave signal from each sensor of automobile, and exports corresponding square signal to microcontroller; Described low-pass filter circuit is for carrying out outputing to microcontroller after filtering to each switching signal of automobile; Described π type eliminator is for carrying out outputing to microcontroller after filtering to the analogue signal being obtained by each sensor institute sensing; Described RS-232 electrical level conversion circuit, K line interface circuit, CAN bus interface circuit and LIN bus interface circuit communicating by letter for microcontroller and the external world; Described low limit drive circuit, flash drive circuit, Darlington transistor drive circuit, drive circuit based on SPI interface are for according to the corresponding various loads that drive automobile of the output signal of microcontroller; Described memory chip is used for storing data.
Further, described reset circuit comprises resistance R 1, capacitor C 1 and diode D1, the first end of described resistance R 1 connects negative electrode and the power supply of described diode D1, the second end of described resistance R 1 connects the anode of described diode D1 and one end of described capacitor C 1, the other end ground connection of described capacitor C 1, the RESET input of microcontroller described in the anodic bonding of described diode D1.
Further, described power circuit comprises that capacitor C 11 is to C18, diode D11, wire jumper W1, TVS pipe, resistance R 11 and power supply chip IC, anodic bonding the first power input of described diode D11, negative electrode is connected with described power supply chip IC, one end of described capacitor C 11 connects the anode of described diode D11, the other end ground connection, described capacitor C 12 is in parallel with capacitor C 11, the first pin ground connection of described TVS pipe, crus secunda is connected with the anode of described diode D11, tripod ground connection, described wire jumper W1 is in parallel with diode D11, one end of described capacitor C 13 connects the negative electrode of described diode D11, another connecting end ground connection, described capacitor C 14 is in parallel with capacitor C 13, described power supply chip is also by capacitor C 18 ground connection, connect 5V positive voltage by described resistance R 11, one end of described capacitor C 15 is connected with the 5th pin of power supply chip IC, another connecting end ground connection, described capacitor C 16, capacitor C 17 is all in parallel with capacitor C 15.
Further, described amplification circuit comprises capacitor C 2, capacitor C 3, capacitor C 4, capacitor C 5, capacitor C 6, resistance R 2, resistance R 3, resistance R 4, resistance R 5 and operational amplifier U1, the first connecting end of described resistance R 3 connects first signal input end, the in-phase input end of the second connecting end concatenation operation amplifier U1, the first connecting end of one end contact resistance R3 of described capacitor C 2, another connecting end ground connection, one connecting end of described resistance R 2 connects the first connecting end of described resistance R 3, another connecting end ground connection, node between described resistance R 3 and operational amplifier U1 is by capacitor C 3 ground connection, the in-phase input end of described operational amplifier U1 is connected by capacitor C 4 with inverting input, described inverting input is also connected with the output terminal of operational amplifier U1 by resistance R 4, the power end of described operational amplifier U1 connects a connecting end of 5V positive voltage and capacitor C 5, another connecting end ground connection of described capacitor C 5, the grounding end ground connection of described operational amplifier U1, described output terminal connects first signal output terminal by resistance R 5, node between described resistance R 5 and first signal output terminal is by being connected capacitor C 6 ground connection.
Further, described zero cross detection circuit comprises resistance R 21-R26, capacitor C 21-C24, diode D21 and operational amplifier U21, one connecting end of described resistance R 21 is connected with the inverting input of operational amplifier U21, another connecting end connects secondary signal input end, the negative electrode of described diode D21 is connected with the inverting input of operational amplifier U21, plus earth, described capacitor C 21, resistance R 22 is in parallel with diode D21, one connecting end of described resistance R 23 connects the in-phase input end of described operational amplifier 21, the other end connects positive source VCC, one connecting end of described resistance R 24 connects the inverting input of described operational amplifier U21, the other end ground connection, described capacitor C 22 is in parallel with resistance R 24, the grounding end ground connection of described operational amplifier U21, power end connects positive source VCC, one connecting end of described capacitor C 23 connects described power end, another connecting end ground connection, between the in-phase input end of described operational amplifier U21 and output terminal, be connected by resistance R 25, described resistance R 26 1 connecting ends connect described output terminal, another connecting end connects positive voltage VCC, one end of described capacitor C 24 connects output terminal, the other end ground connection, the output terminal of described operational amplifier U21 is connected with secondary signal output terminal.
Further, described π type eliminator circuit comprises capacitor C 31, capacitor C 32 and resistance R 31, the first connecting end of described resistance R 31 connects the 3rd signal input part, the second connecting end connects the 3rd signal output part, one connecting end of described capacitor C 31 is connected with the first connecting end of resistance R 31, another connecting end ground connection, a connecting end of described capacitor C 32 is connected with the second connecting end of resistance R 31, another connecting end ground connection.
Further, described low-pass filter circuit comprises resistance R 41, resistance R 42, capacitor C 41, described resistance R 41 first connecting ends connect the 4th signal input part, the second connecting end connects the 4th signal output part, described resistance R 42 1 connecting ends are connected with the second connecting end of described resistance R 41, another connecting end connects 5V positive voltage, and described capacitor C 41 1 connecting ends connect the second connecting end of described resistance R 41, another connecting end ground connection.
Further, described Darlington transistor circuit comprises chip U1, diode D51, the 8 pin ground connection of described chip U1,9 pin connect positive supply VCC, between 8 pin of described chip U1 and 9 pin, be connected by diode D51, described 8 pin connect the positive pole of diode D51, and 9 pin connect the negative pole of diode D51,1 pin-7 pin of described chip U1 is connected with microcontroller, and 10 pin-16 pin connect load.
Further, described memory chip circuit comprises resistance R 61, capacitor C 61, capacitor C 62, memory chip U2, the first connecting end of described resistance R 61 connects the 5th signal input part, the second connecting end connects positive supply VCC, the 1st pin of described memory chip U2, the 2nd pin, the 5th pin, the 6th pin is connected with microcontroller, the 3rd pin of described memory chip U2 connects the 5th input end, the 4th pin ground connection of described memory chip U2, the 7th pin of described memory chip U2 connects positive supply VCC, the 8th pin of described memory chip U2 connects the 7th pin, one connecting end of described capacitor C 61 connects positive supply VCC, another connecting end ground connection, described capacitor C 62 is in parallel with capacitor C 61.
Further, described low limit drive circuit comprises resistance R 71, resistance R 72, resistance R 73, resistance R 74, triode Q73 and capacitor C 71, the base stage of described triode Q73 connects the 6th signal input part by resistance R 73, collector electrode connects power supply by resistance R 71, grounded-emitter connection, described base stage is connected by resistance R 74 with emitter, the collector electrode of the first connecting end connecting triode of described resistance R 72, the second connecting end is connected with the 6th signal output part, the second connecting end of described capacitor C 71 one end contact resistance R72, the other end ground connection.
Beneficial effect: dual-fuel controller of the present utility model, adopt modular circuit, can expand easily new function; Compatible all four kinds of current communication interfaces, convenient and outside various systems communicate, and interface is convenient, and reliability is higher.And overcome traditional combustion gas/gasoline double-fuel controller, needed driver manually to determine current fuel mode, be difficult to the technical problem of the performance that makes full use of dual-fuel automobile.
Brief description of the drawings
Fig. 1 is electrical block diagram of the present utility model.
Fig. 2 is by automatical control system schematic diagram of the present utility model.
Fig. 3 is the utility model reset circuit circuit diagram.
Fig. 4 is the utility model power circuit circuit diagram.
Fig. 5 is the utility model amplification circuit circuit diagram.
Fig. 6 is the circuit diagram of the utility model zero cross detection circuit.
Fig. 7 is the utility model π type eliminator circuit diagram.
Fig. 8 is the utility model low-pass filter circuit circuit diagram.
Fig. 9 is the utility model Darlington transistor drive circuit circuit diagram.
Figure 10 is the utility model memory chip circuit figure.
Figure 11 is low limit of the present utility model drive circuit circuit diagram.
Figure 12 is flash drive circuit circuit diagram of the present utility model.
Embodiment
Below in conjunction with specific embodiment, the utility model is described in further detail.
Please refer to Fig. 1, Fig. 1 is the electrical block diagram of the utility model rock gas and gasoline double-fuel controller.The utility model rock gas comprises microcontroller and the power circuit being connected with described microcontroller respectively with the preferred embodiments of gasoline double-fuel controller, reset circuit, amplification circuit, zero cross detection circuit, low-pass filter circuit, π type eliminator, RS-232 electrical level conversion circuit, K line interface circuit, CAN bus interface circuit, LIN bus interface circuit, low limit drive circuit, flash drive circuit, Darlington transistor drive circuit, memory chip, based on the drive circuit of SPI interface.
Please refer to Fig. 2, Fig. 2 is by the automatical control system schematic diagram between the utility model rock gas and gasoline double-fuel controller and the outer member of automobile.The utility model dual-fuel controller in use, described dual-fuel controller from intake temperature and manifold pressure sensor, gas rail pressure sensor, engine water temperature sensor, lambda sensor, post oxygen sensor, vehicle speed sensor, crankshaft position sensor read sensing signal, also reveal alarm switch, ignition switch and diverter switch read switch signal from the first leakage alarm switch, second, judge the vehicle condition such as residual capacity of water temperature, the speed of a motor vehicle, combustion gas and the gasoline of motor.The microcontroller of described rock gas and gasoline double-fuel controller is according to received information, corresponding buzzer, trouble light, the status indicator lamp even load of driving shows current vehicle condition, and drive high-voltage electromagnetic valve relay, FP Fuel Pump Relay, blast nozzle power supply relay, oil nozzle transfer relay and blast nozzle even load, automatically control automobile and switch between combustion gas pattern or fuel oil pattern.Meanwhile, described dual-fuel controller can also pass through RS-232 electrical level conversion circuit, K line interface circuit, CAN bus interface circuit, LIN bus interface circuit communicates by letter with extraneous, and after automobile power-down, stores significant data by memory chip EEPROM.
Please continue to be back to Fig. 1, concrete, described microcontroller is for reading in signal from various sensors, and the various loads of output signal control.Preferably, described microcontroller adopts singlechip chip XC2733 or 9S12G128.Described power circuit is for supplying low tension to microcontroller and each coupled circuit.Described reset circuit is for providing reset signal to microcontroller.Described amplification circuit for from lambda sensor read small-signal and amplified output to microcontroller.Described zero cross detection circuit is connected with microcontroller, for reading sine wave signal and be converted into corresponding square wave to export microcontroller to from vehicle speed sensor and crankshaft position sensor.Described low-pass filter circuit is connected with microcontroller, after the first leakage alarm switch, second is revealed to the switching signal filtering such as alarm switch, ignition switch, diverter switch, outputs to microcontroller.Described π type eliminator is connected with microcontroller, for to outputing to microcontroller after the analogue signal filtering of the sensors such as intake temperature and manifold pressure sensor, gas rail pressure sensor, engine water temperature sensor.Described RS-232 electrical level conversion circuit, K line interface circuit, CAN bus interface circuit, LIN bus interface circuit, for communicating by letter of microcontroller and extraneous device.Described low limit drive circuit and flash drive circuit, for driving buzzer, trouble light, state display lamp even load.Described Darlington transistor drive circuit is used for driving high-voltage electromagnetic valve relay, FP Fuel Pump Relay, blast nozzle power supply relay even load.Described memory chip EEPROM for storing significant data after automobile power-down.The described drive circuit based on SPI interface is used for driving oil nozzle transfer relay and blast nozzle even load.
Next will each concrete circuit structure be described in detail:
Please refer to Fig. 3, Fig. 3 is the circuit diagram of the utility model rock gas and gasoline double-fuel controller reset circuit.Described reset circuit comprises resistance R 1, capacitor C 1 and diode D1, the first end of described resistance R 1 connects negative electrode and the power supply VCC of described diode D1, the second end connects the anode of described diode D1 and one end of described capacitor C 1, the other end ground connection of described capacitor C 1, the anode of described diode D1 also connects the RESET input RST of described microcontroller.
Described reset circuit is at powered on moment, and the RESET input RST receives positive pulse signal, and keeps high level more than 10ms, can make microcontroller can realize active homing.In described reset circuit, the object of parallel diode D1 is that when after power supply VCC power-off, capacitor C 1 is discharged rapidly by diode D1, in the time that power supply VCC recovers, just can realize reliably and power on and automatically reset.If there is no diode D1, in the time that power supply VCC disturbs instant cut-off because of certain, because capacitor C 1 can not bleed off electric charge rapidly, in the time that power supply VCC recovers, microcontroller can not power on and automatically reset, and causes moving out of control.
Please refer to Fig. 4, Fig. 4 is the circuit diagram of power circuit in the utility model.Described power circuit comprises capacitor C 11-C18, diode D11, wire jumper W1, TVS pipe 20, resistance R 11 and power supply chip IC.
In the present embodiment, the poor voltage regulator chip TLE4275 of power supply chip IC preferred lower pressure.The anodic bonding power input 19 of described diode D11, negative electrode is connected with described power supply chip IC, one end of described capacitor C 11 connects the anode of described diode D11, the other end ground connection, described capacitor C 12 is in parallel with capacitor C 11, the first pin ground connection of described TVS pipe 20, crus secunda is connected with the anode of described diode D11, tripod ground connection, described wire jumper W1 is in parallel with diode D11, one end of described capacitor C 13 connects the negative electrode of described diode D11, another connecting end ground connection, described capacitor C 14 is in parallel with capacitor C 13, described power supply chip is also by capacitor C 18 ground connection, connect 5V positive voltage by described resistance R 11, one end of described capacitor C 15 is connected with the 5th pin of power supply chip IC, another connecting end ground connection, described capacitor C 16, capacitor C 17 is all in parallel with capacitor C 15.
Please refer to Fig. 5, Fig. 5 is the circuit diagram of the utility model rock gas and gasoline double-fuel controller amplification circuit.Described amplification circuit comprises capacitor C 2, capacitor C 3, capacitor C 4, capacitor C 5, capacitor C 6, resistance R 2, resistance R 3, resistance R 4, resistance R 5, operational amplifier U1.The first end of described resistance R 3 connects signal input part 2, described signal input part 2 connects outside front lambda sensor, post oxygen sensor, in the past lambda sensor, post oxygen sensor read signal, the in-phase input end of the second end concatenation operation amplifier U1 of described resistance R 3, the first end of one end contact resistance R3 of described capacitor C 2, the other end ground connection.One end of described resistance R 2 connects the first end of described resistance R 3, the other end ground connection.Node between described resistance R 3 and the in-phase input end of operational amplifier U1 is by capacitor C 3 ground connection.The in-phase input end of described operational amplifier U1 is also directly connected with inverting input by capacitor C 4, and described inverting input is also directly connected with the output terminal of operational amplifier U1 by resistance R 4.The power end of described operational amplifier U1 connects one end of 5V positive voltage and capacitor C 5, the other end ground connection of described capacitor C 5, the grounding end ground connection of described operational amplifier U1.Described output terminal also directly connects signal output part 3 by resistance R 5, and described amplification circuit connects microcontroller by described signal output part 3.Node between described resistance R 5 and signal output part 3 is by capacitor C 6 ground connection.As preferably, described operational amplifier U1 chip adopts TLC2272 or LM2904.
Please refer to Fig. 6, Fig. 6 is the circuit diagram of zero cross detection circuit in the utility model.Described zero cross detection circuit comprises resistance R 21-R26, capacitor C 21-C24, diode D21 and operational amplifier U21.One connecting end of described resistance R 21 is connected with the inverting input of operational amplifier U21, another connecting end connects signal input part 27, described signal input part 27 is connected with external vehicle-speed sensor or crankshaft position sensor, from vehicle speed sensor or crankshaft position sensor read signal.The negative electrode of described diode D21 is connected with the inverting input of operational amplifier U21, plus earth, described capacitor C 21, resistance R 22 is in parallel with diode D21, one connecting end of described resistance R 23 connects the in-phase input end of described operational amplifier 21, the other end connects positive source VCC, one connecting end of described resistance R 24 connects the in-phase input end of described operational amplifier U21, the other end ground connection, described capacitor C 22 is in parallel with resistance R 24, the grounding end ground connection of described operational amplifier U21, power end connects positive source VCC, one connecting end of described capacitor C 23 connects described power end, another connecting end ground connection, between the in-phase input end of described operational amplifier U21 and output terminal, be connected by resistance R 25, described resistance R 26 1 connecting ends connect described output terminal, another connecting end connects positive voltage VCC, one end of described capacitor C 24 connects output terminal, the other end ground connection, the output terminal of described operational amplifier U21 is connected with signal output part 28.Described signal output part 28 is connected with described microcontroller.Further, described operational amplifier 21 chips adopt LM2903.
Please refer to Fig. 7, Fig. 7 is the utility model π type eliminator circuit diagram.Described π type eliminator circuit diagram comprises capacitor C 31, capacitor C 32 and resistance R 31.The first connecting end of described resistance R 31 connects input end 31, described input end 31 connects the sensors such as external feed stream temperature and manifold pressure sensor, gas rail pressure sensor, engine water temperature sensor, from the sensing signal of the external sensors such as intake temperature and manifold pressure sensor, gas rail pressure sensor, engine water temperature sensor, the second connecting end of described resistance R 31 connects output terminal 32, and described output terminal 32 is connected with microcontroller.One connecting end of described capacitor C 31 is connected with the first connecting end of resistance R 31, another connecting end ground connection.One connecting end of described capacitor C 32 is connected with the second connecting end of resistance R 31, another connecting end ground connection.The voltage of inputting from described input end 31, first pass through the filtering of capacitor C 31, be added to again in the eliminator being formed by R31 and C32, the capacitive reactance of capacitor C 32 and R31 form a bleeder circuit, because of the capacitive reactance of capacitor C 32 very little, so the dividing potential drop attenuation to alternating component is very large, reach the object of filtering.
Please refer to Fig. 8, Fig. 8 is the utility model low-pass filter circuit circuit diagram.Described low-pass filter circuit comprises resistance R 41, resistance R 42, capacitor C 41.The first connecting end of described resistance R 41 connects input end 41, described input end 41 connects outside first and reveals alarm switch, the second leakage alarm switch, ignition switch, diverter switch, receive first and reveal the switching signals such as alarm switch, the second leakage alarm switch, ignition switch, diverter switch, the second connecting end of described resistance R 41 connects output terminal 42, and described output terminal 42 is connected with microcontroller.One connecting end of described resistance R 42 is connected with the second connecting end of described resistance R 41, and another connecting end connects 5V positive voltage.One connecting end of described capacitor C 41 connects the second connecting end of described resistance R 41, another connecting end ground connection.Described low-pass filter circuit is used for outputing to microcontroller after switch signal filtering.
Please refer to Fig. 9, Fig. 9 is the utility model Darlington transistor drive circuit circuit diagram.Described Darlington transistor drive circuit comprises chip U1, diode D51.Concrete, described chip U1 adopts Darlington transistor array chip ULN2003 or TDA62783.Grounding pin GND (8 pin) ground connection of described chip U1, power pins COM(9 pin) connect positive supply VCC, for giving described chip U1 power supply.Between 8 pin of described chip U1 and 9 pin, be connected by diode D51, and described 8 pin connect the anode of diode D51, the negative electrode of 9 pin connection diode D51.1 pin-7 pin of described chip U1 is all connected with microcontroller, 10 pin-16 pin are connected with high-voltage electromagnetic valve relay, FP Fuel Pump Relay, blast nozzle power supply relay even load, for driving high-voltage electromagnetic valve relay, FP Fuel Pump Relay, blast nozzle power supply relay even load.
Please refer to Figure 10, Figure 10 is the circuit diagram of the utility model memory chip; Described memory chip circuit figure comprises resistance R 61, capacitor C 61, capacitor C 62 and memory chip U2.Concrete, described memory chip U2 selects eeprom chip M95010, M95020, M95040, M95080, M95160, M95320, M95640, M95128 or the M95256 based on SPI interface.The first connecting end of described resistance R 61 connects input end 63, the second connecting end connects positive supply VCC, the 1st pin of described memory chip U2, the 2nd pin, the 5th pin, the 6th pin is connected and realizes data transmission with microcontroller, the 3rd pin of described memory chip U2 connects input end 63, the 4th pin ground connection of described memory chip U2, the 7th pin of described memory chip U2 connects positive supply VCC, the 8th pin of described memory chip U2 connects the 7th pin, one connecting end of described capacitor C 61 connects positive supply VCC, another connecting end ground connection, described capacitor C 62 is in parallel with capacitor C 61.
Please refer to Figure 11, Figure 11 is low limit of the present utility model drive circuit circuit diagram.Described low limit drive circuit comprises resistance R 71, resistance R 72, resistance R 73, resistance R 74, triode Q73 and capacitor C 71.The base stage of described triode 73 connects input end 71 by resistance R 73, and described input end 71 is connected with microcontroller, and collector electrode connects power supply by resistance R 71, grounded-emitter connection, and described base stage is connected by resistance R 74 with emitter.The collector electrode of the first connecting end connecting triode of described resistance R 72, the second connecting end is connected with output terminal 72, and described output terminal 72 is connected with buzzer, drives buzzer operation, the second connecting end of described capacitor C 71 one end contact resistance R72, the other end ground connection.
Please refer to Figure 12, Figure 12 is flash drive circuit circuit diagram of the present utility model.Described flash drive circuit comprises resistance R 81, triode 82, resistance R 82 and capacitor C 81.The base stage of described triode Q82 connects input end 81, described input end 81 is connected with microcontroller, emitter connects positive voltage VCC, collector electrode is connected with output terminal 82 by resistance R 82, described output terminal 82 connects trouble light, state display lamp even load, for driving malfunction lamp, state display lamp operation.One connecting end of described resistance R 81 is connected with power supply VCC, and the other end is connected with the base stage of described triode 82, and a connecting end of described capacitor C 81 is connected with electric capacity R82, another connecting end ground connection.
In addition, RS-232 electrical level conversion circuit described in the utility model, its serial port chip adopts the RS-232 transponder chip MAX3227 with automatic cut-off function.CAN bus interface circuit transponder chip adopts TJA1051 or TLE6250.Its transponder chip of LIN bus circuit adopts ATA6622, L9638 or TJA1020T.Drive circuit based on SPI interface it drive chip to adopt engine control chip MC33810, SCZ900504 or the MCZ33800 based on SPI interface.The circuit structure of the circuit structure of described RS-232 electrical level conversion circuit, CAN bus interface circuit, LIN bus circuit and the drive circuit based on SPI interface and RS-232 electrical level conversion circuit of the prior art, CAN bus interface circuit, LIN bus circuit and the drive circuit based on SPI interface is roughly the same, just repeats no more at this.
Dual-fuel controller of the present utility model, adopts modular circuit, can expand easily new function; Compatible all four kinds of current communication interfaces, convenient and outside various systems communicate, and interface is convenient, and reliability is higher.And overcome traditional combustion gas/gasoline double-fuel controller, needed driver manually to determine current fuel mode, be difficult to the technical problem of the performance that makes full use of dual-fuel automobile.
These are only mode of execution of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or conversion of equivalent flow process that utilizes the utility model specification and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (10)
1. a rock gas and gasoline double-fuel controller, be used in automobile, it is characterized in that, described dual-fuel controller comprises: microcontroller and the power circuit being connected with described microcontroller respectively, reset circuit, amplification circuit, zero cross detection circuit, low-pass filter circuit, π type eliminator, RS-232 electrical level conversion circuit, K line interface circuit, CAN bus interface circuit, LIN bus interface circuit, low limit drive circuit, flash drive circuit, Darlington transistor drive circuit, memory chip and the drive circuit based on SPI interface; Described power circuit is for providing operating voltage to whole dual-fuel controller; Described reset circuit is for providing reset signal to microcontroller; Described amplification circuit is used for outputing to microcontroller from each sensor read signal of automobile and being amplified; Described zero cross detection circuit is used for reading sine wave signal from each sensor of automobile, and exports corresponding square signal to microcontroller; Described low-pass filter circuit is for carrying out outputing to microcontroller after filtering to each switching signal of automobile; Described π type eliminator is for carrying out outputing to microcontroller after filtering to the analogue signal being obtained by each sensor institute sensing; Described RS-232 electrical level conversion circuit, K line interface circuit, CAN bus interface circuit and LIN bus interface circuit communicating by letter for microcontroller and the external world; Described low limit drive circuit, flash drive circuit, Darlington transistor drive circuit, drive circuit based on SPI interface are for according to the corresponding various loads that drive automobile of the output signal of microcontroller; Described memory chip is used for storing data.
2. dual-fuel controller as claimed in claim 1, it is characterized in that, described reset circuit comprises resistance R 1, capacitor C 1 and diode D1, the first end of described resistance R 1 connects negative electrode and the power supply of described diode D1, the second end of described resistance R 1 connects the anode of described diode D1 and one end of described capacitor C 1, the other end ground connection of described capacitor C 1, the RESET input of microcontroller described in the anodic bonding of described diode D1.
3. dual-fuel controller as claimed in claim 1, it is characterized in that, described power circuit comprises that capacitor C 11 is to C18, diode D11, wire jumper W1, TVS pipe, resistance R 11 and power supply chip IC, anodic bonding the first power input of described diode D11, negative electrode is connected with described power supply chip IC, one end of described capacitor C 11 connects the anode of described diode D11, the other end ground connection, described capacitor C 12 is in parallel with capacitor C 11, the first pin ground connection of described TVS pipe, crus secunda is connected with the anode of described diode D11, tripod ground connection, described wire jumper W1 is in parallel with diode D11, one end of described capacitor C 13 connects the negative electrode of described diode D11, another connecting end ground connection, described capacitor C 14 is in parallel with capacitor C 13, described power supply chip is also by capacitor C 18 ground connection, connect 5V positive voltage by described resistance R 11, one end of described capacitor C 15 is connected with the 5th pin of power supply chip IC, another connecting end ground connection, described capacitor C 16, capacitor C 17 is all in parallel with capacitor C 15.
4. dual-fuel controller as claimed in claim 1, it is characterized in that, described amplification circuit comprises capacitor C 2, capacitor C 3, capacitor C 4, capacitor C 5, capacitor C 6, resistance R 2, resistance R 3, resistance R 4, resistance R 5 and operational amplifier U1, the first connecting end of described resistance R 3 connects first signal input end, the in-phase input end of the second connecting end concatenation operation amplifier U1, the first connecting end of one end contact resistance R3 of described capacitor C 2, another connecting end ground connection, one connecting end of described resistance R 2 connects the first connecting end of described resistance R 3, another connecting end ground connection, node between described resistance R 3 and operational amplifier U1 is by capacitor C 3 ground connection, the in-phase input end of described operational amplifier U1 is connected by capacitor C 4 with inverting input, described inverting input is also connected with the output terminal of operational amplifier U1 by resistance R 4, the power end of described operational amplifier U1 connects a connecting end of 5V positive voltage and capacitor C 5, another connecting end ground connection of described capacitor C 5, the grounding end ground connection of described operational amplifier U1, described output terminal connects first signal output terminal by resistance R 5, node between described resistance R 5 and first signal output terminal is by being connected capacitor C 6 ground connection.
5. dual-fuel controller as claimed in claim 1, it is characterized in that, described zero cross detection circuit comprises resistance R 21-R26, capacitor C 21-C24, diode D21 and operational amplifier U21, one connecting end of described resistance R 21 is connected with the inverting input of operational amplifier U21, another connecting end connects secondary signal input end, the negative electrode of described diode D21 is connected with the inverting input of operational amplifier U21, plus earth, described capacitor C 21, resistance R 22 is in parallel with diode D21, one connecting end of described resistance R 23 connects the in-phase input end of described operational amplifier U21, the other end connects positive source VCC, one connecting end of described resistance R 24 connects the inverting input of described operational amplifier U21, the other end ground connection, described capacitor C 22 is in parallel with resistance R 24, the grounding end ground connection of described operational amplifier U21, power end connects positive source VCC, one connecting end of described capacitor C 23 connects described power end, another connecting end ground connection, between the in-phase input end of described operational amplifier U21 and output terminal, be connected by resistance R 25, described resistance R 26 1 connecting ends connect described output terminal, another connecting end connects positive voltage VCC, one end of described capacitor C 24 connects output terminal, the other end ground connection, the output terminal of described operational amplifier U21 is connected with secondary signal output terminal.
6. dual-fuel controller as claimed in claim 1, it is characterized in that, described π type eliminator circuit comprises capacitor C 31, capacitor C 32 and resistance R 31, the first connecting end of described resistance R 31 connects the 3rd signal input part, the second connecting end connects the 3rd signal output part, and a connecting end of described capacitor C 31 is connected with the first connecting end of resistance R 31, another connecting end ground connection, one connecting end of described capacitor C 32 is connected with the second connecting end of resistance R 31, another connecting end ground connection.
7. dual-fuel controller as claimed in claim 1, it is characterized in that, described low-pass filter circuit comprises resistance R 41, resistance R 42, capacitor C 41, described resistance R 41 first connecting ends connect the 4th signal input part, the second connecting end connects the 4th signal output part, and described resistance R 42 1 connecting ends are connected with the second connecting end of described resistance R 41, and another connecting end connects 5V positive voltage, described capacitor C 41 1 connecting ends connect the second connecting end of described resistance R 41, another connecting end ground connection.
8. dual-fuel controller as claimed in claim 1, it is characterized in that, described Darlington transistor circuit comprises chip U1, diode D51, the 8 pin ground connection of described chip U1,9 pin connect positive supply VCC, between 8 pin of described chip U1 and 9 pin, are connected by diode D51, described 8 pin connect the positive pole of diode D51,9 pin connect the negative pole of diode D51, and 1 pin-7 pin of described chip U1 is connected with microcontroller, and 10 pin-16 pin connect load.
9. dual-fuel controller as claimed in claim 1, it is characterized in that, described memory chip circuit comprises resistance R 61, capacitor C 61, capacitor C 62, memory chip U2, the first connecting end of described resistance R 61 connects the 5th signal input part, the second connecting end connects positive supply VCC, the 1st pin of described memory chip U2, the 2nd pin, the 5th pin, the 6th pin is connected with microcontroller, the 3rd pin of described memory chip U2 connects the 5th input end, the 4th pin ground connection of described memory chip U2, the 7th pin of described memory chip U2 connects positive supply VCC, the 8th pin of described memory chip U2 connects the 7th pin, one connecting end of described capacitor C 61 connects positive supply VCC, another connecting end ground connection, described capacitor C 62 is in parallel with capacitor C 61.
10. dual-fuel controller as claimed in claim 1, it is characterized in that, described low limit drive circuit comprises resistance R 71, resistance R 72, resistance R 73, resistance R 74, triode Q73 and capacitor C 71, the base stage of described triode Q73 connects the 6th signal input part by resistance R 73, collector electrode connects power supply by resistance R 71, grounded-emitter connection, described base stage is connected by resistance R 74 with emitter, the collector electrode of the first connecting end connecting triode of described resistance R 72, the second connecting end is connected with the 6th signal output part, the second connecting end of described capacitor C 71 one end contact resistance R72, the other end ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420021819.1U CN203670012U (en) | 2014-01-14 | 2014-01-14 | Natural gas and gasoline double-fuel controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420021819.1U CN203670012U (en) | 2014-01-14 | 2014-01-14 | Natural gas and gasoline double-fuel controller |
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| Publication Number | Publication Date |
|---|---|
| CN203670012U true CN203670012U (en) | 2014-06-25 |
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| CN201420021819.1U Expired - Fee Related CN203670012U (en) | 2014-01-14 | 2014-01-14 | Natural gas and gasoline double-fuel controller |
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| CN (1) | CN203670012U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107103653A (en) * | 2017-03-22 | 2017-08-29 | 合肥仁德电子科技有限公司 | A kind of vehicle intelligent terminal system |
| CN113915395A (en) * | 2021-10-21 | 2022-01-11 | 宁波赛福汽车制动有限公司 | Electromagnetic valve assembly control device and method |
-
2014
- 2014-01-14 CN CN201420021819.1U patent/CN203670012U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107103653A (en) * | 2017-03-22 | 2017-08-29 | 合肥仁德电子科技有限公司 | A kind of vehicle intelligent terminal system |
| CN113915395A (en) * | 2021-10-21 | 2022-01-11 | 宁波赛福汽车制动有限公司 | Electromagnetic valve assembly control device and method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 401122 Chongqing new North Zone by opening Yunzao Road No. 3 Patentee after: United Automotive Electronics (Chongqing) Co., Ltd. Address before: 401122 Chongqing City, Yubei District economic development zone was opened Yunzao Road No. 3 Patentee before: CHONGQING CHANGAN VISTEON ENGINE CONTROL SYSTEMS CO., LTD. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140625 Termination date: 20160114 |