CN202937357U - Pressure regulator circuit of LNG (liquefied natural gas) engine base on CAN (controller area network) communication - Google Patents
Pressure regulator circuit of LNG (liquefied natural gas) engine base on CAN (controller area network) communication Download PDFInfo
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- CN202937357U CN202937357U CN2012205677838U CN201220567783U CN202937357U CN 202937357 U CN202937357 U CN 202937357U CN 2012205677838 U CN2012205677838 U CN 2012205677838U CN 201220567783 U CN201220567783 U CN 201220567783U CN 202937357 U CN202937357 U CN 202937357U
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Abstract
The utility model relates to a pressure regulator circuit of an LNG engine base on CAN communication. The pressure regulator circuit is characterized in that an LNG pressure signal is connected with a pressure sensor processing circuit in the pressure regulator circuit; the pressure sensor processing circuit is connected with a microprocessor which is connected with a power supply circuit, a voltage/temperature monitoring circuit, and an EEPROM (electrically erasable programmable read-only memory) circuit respectively; the microprocessor is further connected with a pressure-regulating electromagnetic valve through a pressure regulating valve drive circuit; a CAN communication circuit is connected with the microprocessor, wherein the electronic pressure regulating valve drive circuit is communicated with an ECU (electronic control unit) of the LNG through the CAN communication circuit, and the microprocessor controls the opening position of the pressure regulating valve in real time through received CAN communication circuit messages, thereby controlling the air blast pressure of the LNG engine. The utility model provides a scheme that pressure regulation of the LNG is controlled in real time and driven in the CAN communication manner.
Description
Technical field
The utility model relates to a kind of LNG Liquefied natural gas engine pressure regulator circuit based on CAN communication, belongs to the automotive engine control field.
Background technique
Traditional engine controller is that drive circuitry arrangement is inner at controller, then controls mixing of the injection of fuel oil and fuel oil and air, many wire harness of needs layout, EMC characteristic relative mistake by wire harness; When the LNG Liquefied natural gas engine controller designs, mainly the pressure of controlling LNG Liquefied natural gas, in controller design in order to solve above-mentioned two kinds of problems, adopt distributed control method, being about to drive circuit and part control circuit, to be placed on the whiff pressure regulator inner, then by the master controller communication of CAN network and LNG Liquefied natural gas motor, reduce wire harness quantity thereby reach, improve the purpose of EMC characteristic.
Summary of the invention
The purpose of this utility model has been to provide a kind of LNG Liquefied natural gas engine pressure regulator circuit based on CAN communication, it integrates for drive circuit and control circuit in existing LNG Liquefied natural gas engine controller, the problem that many, the EMC characteristic of connecting up reduces provides a kind of CAN communication modes to control in real time, drive the pressure controlled circuit arrangement of LNG Liquefied natural gas.
the technical solution of the utility model is achieved in that a kind of LNG Liquefied natural gas engine pressure regulator circuit based on CAN communication, is comprised of seven parts such as power circuit, pressure transducer processing circuit, voltage/temperature monitoring circuit, EEPROM memory circuit, pressure regulator valve drive circuit, CAN communicating circuit, microprocessors, it is characterized in that: the LNG Liquefied natural gas pressure signal is connected with pressure transducer processing circuit in circuit, the pressure transducer processing circuit is connected with microprocessor, power circuit is connected with microprocessor, voltage/temperature monitoring circuit is connected with microprocessor, EEPROM memory circuit and microprocessor are interconnected, microprocessor is connected with the pressure electromagnetic valve for adjusting by the pressure regulator valve drive circuit, CAN communicating circuit and microprocessor are interconnected, wherein the Electron pressure regulating valve drive circuit carries out communication by CAN communicating circuit and LNG ECU, microprocessor is controlled the open position of Electron pressure regulating valve in real time by the CAN communicating circuit message that receives, control the whiff pressure of LNG motor.
Powered battery signal in described power circuit is through bi-directional voltage stabilizing diode D1; port esd protection capacitor C 6; the low pass RC filter network that R6, C7 form; power supply signal is input to 1 pin of power supply chip U2; the 5 pin output 5V power supply signal VCC of power supply chip U2; VCC is through reference diode D2; filter capacitor C16, C17; the power supply signal of stable output after processing; 4 pin of power supply chip U2 are connected with capacitor C 13, and the 2 pin output system power-on reset signals of power supply chip U2 are connected with input 8 pins that reset of microprocessor U5 by resistance R 1.
The difference output of described pressure transducer processing circuit U1 differential pressure transducer 4 pin and 2 pin is through R7, R8, after the differential filtering circuit that C9 forms, through the U4:2 differential amplification, VACC is through R13, stable voltage bias is provided after the R14 dividing potential drop, and U4:1 is converted into Single-end output after U4:2 input voltage secondary is amplified.
4 pin of described microprocessor U5,30 pin, 43 pin meet VCC, and 5 pin of U5,29 pin, 42 pin meet GND, and C5, C20, C14 meet respectively VCC and GND as the decoupling capacitor of 4 pin of U5,30 pin, three power pins of 43 pin; 6,7 pin of U5 are connected to coupling crystal oscillator Y1 and resistance R 2, and by capacitor C 2, C3 ground connection; Reset signal is connected with input 8 pin that reset of U5 by resistance R 1, and 8 pin of U5 are by moving VCC on resistance R 5, by capacitor C 4 ground connection simultaneously; 9 pin of U5 are realized the function of control simulation power supply VACC power supply by resistance R 3, R4 and PNP triode Q1; 33 pin of U5 connect by moving VCC on resistance R 19 1 pin that program is downloaded connector assembly simultaneously.
7,8 pin of the memory chip U3 of described EEPROM memory circuit are connected with VCC, simultaneously by filter capacitor C8 ground connection; 1 pin of U3 is connected with 10 pin of microprocessor U5 by moving VCC on resistance R 9 simultaneously, and 2,3,5,6 pin of U3 are connected with 16,17,15,14 pins of microprocessor U5 respectively, realize the SPI communication interface; The 4 pin ground connection of U3.
3 pin of transceiving chip U7 in described CAN communicating circuit are connected with VCC, simultaneously by filter capacitor C24 ground connection; 1 pin of U7,4 pin are connected with CAN communication interface pin 21 pin, 22 pin of microprocessor U5 by resistance R 31, R32 respectively; 8 pin of U7 pull down to ground by resistance R 33, are connected with 20 pin of microprocessor U5 simultaneously; The 7 pin CAN of U7 are high, 6 pin CAN are low is connected with 2 pin, 3 pin of connector assembly respectively, and 7 pin, 6 pin of while U7 connect respectively Transient Suppression Diode D4 and capacitor C 22, C25, D4, C22, the equal ground connection of the C25 the other end; R21, R24, R25 connect respectively that CAN is high, CAN is low, the CAN shielded signal, consist of CAN communicating terminal resistor network.
4 pin, 5 pin, 16 pin that H bridge in described pressure regulator valve drive circuit drives chip U6 are connected with powered battery signal VBAT, and filter capacitor C21 is connected with ground with VBAT simultaneously; 1 pin of H bridge driving chip U6,8 pin, 9 pin, 10 pin, 11 pin, 12 pin, 20 pin are ground connection all; Input signal 3 pin of U6,19 pin are connected with 26 pin, 25 pin of microprocessor U5 respectively; Enable signal 13 pin of U6 are connected with 19 pin of microprocessor U5; Cut-off signals 18 pin of U6 are connected with 18 pin of microprocessor chip U5; Status Flag 2 pin of U6 are connected with 24 pin of microprocessor chip U5, and by moving 5V power supply signal VCC on resistance R 27 to, shunt capacitance C29 is connected with ground with VCC simultaneously; 14,15 pin of U6 are output drive signals 2, connect the anode of solenoid valve, and capacitor C 28 is the esd protection electric capacity of the corresponding connector assembly of solenoid valve anode; 6,7 pin of U6 are output drive signals 1, connect the negative terminal of solenoid valve, and capacitor C 31 is the esd protection electric capacity of the corresponding connector assembly of negative terminal; Chip selection signal 17 pin of U6 need not, unsettled.
After the battery voltage signal VBAT process resistance R 22 of described voltage/temperature monitoring circuit, R23 dividing potential drop, cell voltage supervisory signal dividing potential drop is outputed to 47 pin of microprocessor U5; The negative temperature coefficient sensor signal is outputing to 1 pin of microprocessor U5 through the upper stretching VACC of pull-up resistor R26 through low pass RC filter network R28, C30, C27 is the connector terminals esd protection electric capacity of negative temperature coefficient sensor signal.
Good effect of the present utility model is: can reduce LNG Liquefied natural gas engine controller cost, reduce the wire harness quantity of LNG Liquefied natural gas engine controller, improve the real-time that the LNG Liquefied natural gas engine pressure is regulated.
Description of drawings
Fig. 1 is the schematic block circuit diagram of the utility model circuit embodiments.
Fig. 2 is power circuit diagram in Fig. 1.
Fig. 3 is pressure transducer processing circuit figure in Fig. 1.
Fig. 4 is microcontroller circuit figure in Fig. 1.
Fig. 5 is EEPROM memory circuit figure in Fig. 1.
Fig. 6 is CAN communicating circuit figure in Fig. 1.
Fig. 7 is pressure regulator valve drive circuit figure in Fig. 1.
Fig. 8 is voltage in Fig. 1/temperature monitoring circuit figure.
In Fig. 1-8th, most preferred embodiment of the present utility model, in Fig. 2-8: U1 differential pressure transducer, U2 power supply chip, U3 eeprom memory, U4 operational amplifier, U5 microprocessor, U6 H bridge drive chip, U7CAN transceiving chip, Y1 crystal oscillator, C1-C32 electric capacity, D1 bi-directional voltage stabilizing diode, D2-D3 reference diode, the two-way transient overvoltage twin zener dioder of D4, Q1 PNP triode, Q2 NPN triode, R1-R36 resistance
Embodiment
Below in conjunction with drawings and Examples, the utility model is further illustrated;
in Fig. 1, this Novel liquefied natural gas engine pressure regulating circuit, comprise power circuit, the pressure transducer processing circuit, voltage/temperature monitoring circuit, the EEPROM memory circuit, the pressure regulator valve drive circuit, the CAN communicating circuit, the seven partial circuit modules such as microprocessor, it is characterized in that: the LNG Liquefied natural gas pressure signal is connected with pressure transducer processing circuit in circuit, the pressure transducer processing circuit is connected with microprocessor, power circuit is connected with microprocessor, voltage/temperature monitoring circuit is connected with microprocessor, EEPROM memory circuit and microprocessor are interconnected, microprocessor is connected with the pressure electromagnetic valve for adjusting by the pressure regulator valve drive circuit, the interconnected wherein Electron pressure regulating valve of CAN communicating circuit and microprocessor drive circuit carries out communication by CAN communicating circuit and LNG ECU, microprocessor is controlled the open position of Electron pressure regulating valve in real time by the CAN communicating circuit message that receives, control the whiff pressure of LNG motor.
in Fig. 2, the powered battery signal is through bi-directional voltage stabilizing diode D1, port esd protection capacitor C 6, R6, the low pass RC filter network that C7 forms, power supply signal is input to 1 pin of power supply chip U2, the 5 pin output 5V power supply signal VCC of power supply chip U2, VCC is through reference diode D2, filter capacitor C16, C17, the power supply signal of stable output after processing, 4 pin of power supply chip U2 are connected with capacitor C 13, play the effect of reset signal time-delay, the 2 pin output system power-on reset signals of power supply chip U2 are connected with input 8 pins that reset of microprocessor U5 by resistance R 1, for whole electron pressure regulating circuit provides reliable reset signal.
In Fig. 3, the U1 differential pressure transducer has very high sensitivity, but the full scale voltage output range is smaller, this sensor can be converted into difference output with pressure before combustion gas mixing and the mixed pressure of gas-air, after U4:2 and the amplification of U4:1 operational amplifier two-stage, the differential voltage of mV is exported the single ended voltage that changes into 0 ~ 5V be input to U5 microprocessor A/D passage.The difference output of U1 differential pressure transducer 4 pin and 2 pin is through R7, and R8 is after the differential filtering circuit that C9 forms, through the U4:2 differential amplification, VACC provides stable voltage bias through R13 after the R14 dividing potential drop, U4:1 is converted into Single-end output after U4:2 input voltage secondary is amplified.
In Fig. 4,4 pin of microprocessor U5,30 pin, 43 pin meet VCC, and 5 pin of U5,29 pin, 42 pin meet GND, and C5, C20, C14 meet respectively VCC and GND as the decoupling capacitor of 4 pin of U5,30 pin, three power pins of 43 pin; 6,7 pin of U5 are connected to coupling crystal oscillator Y1 and resistance R 2, and by capacitor C 2, C3 ground connection; Reset signal is connected with input 8 pin that reset of U5 by resistance R 1, and 8 pin of U5 are by moving VCC on resistance R 5, by capacitor C 4 ground connection simultaneously; 9 pin of U5 are realized the function of control simulation power supply VACC power supply by resistance R 3, R4 and PNP triode Q1; 33 pin of U5 connect by moving VCC on resistance R 19 1 pin that program is downloaded connector assembly simultaneously.
In Fig. 5,7,8 pin of eeprom memory U3 are connected with VCC, simultaneously by filter capacitor C8 ground connection; 1 pin of U3 is connected with 10 pin of microprocessor U5 by moving VCC on resistance R 9 simultaneously, and 2,3,5,6 pin of U3 are connected with 16,17,15,14 pins of microprocessor U5 respectively, realize the SPI communication interface; The 4 pin ground connection of U3.
In Fig. 6,3 pin of CAN transceiving chip U7 are connected with VCC, simultaneously by filter capacitor C24 ground connection; 1 pin of U7,4 pin are connected with CAN communication interface pin 21 pin, 22 pin of microprocessor U5 by resistance R 31, R32 respectively; 8 pin of U7 pull down to ground by resistance R 33, are connected with 20 pin of microprocessor U5 simultaneously; The 7 pin CAN of U7 are high, 6 pin CAN are low is connected with 2 pin, 3 pin of connector assembly respectively, and 7 pin, 6 pin of while U7 connect respectively Transient Suppression Diode D4 and capacitor C 22, C25, D4, C22, the equal ground connection of the C25 the other end; R21, R24, R25 connect respectively that CAN is high, CAN is low, the CAN shielded signal, consist of CAN communicating terminal resistor network.
In Fig. 7,4 pin, 5 pin, 16 pin that the H bridge drives chip U6 are connected with powered battery signal VBAT, and filter capacitor C21 is connected with ground with VBAT simultaneously; 1 pin of H bridge driving chip U6,8 pin, 9 pin, 10 pin, 11 pin, 12 pin, 20 pin are ground connection all; Input signal 3 pin of U6,19 pin are connected with 26 pin, 25 pin of microprocessor U5 respectively; Enable signal 13 pin of U6 are connected with 19 pin of microprocessor U5; Cut-off signals 18 pin of U6 are connected with 18 pin of microprocessor chip U5; Status Flag 2 pin of U6 are connected with 24 pin of microprocessor chip U5, and by moving 5V power supply signal VCC on resistance R 27 to, shunt capacitance C29 is connected with ground with VCC simultaneously; 14,15 pin of U6 are output drive signals 2, connect the anode of solenoid valve, and capacitor C 28 is the esd protection electric capacity of the corresponding connector assembly of solenoid valve anode; 6,7 pin of U6 are output drive signals 1, connect the negative terminal of solenoid valve, and capacitor C 31 is the esd protection electric capacity of the corresponding connector assembly of negative terminal; Chip selection signal 17 pin of U6 need not, unsettled.
In Fig. 8, after battery voltage signal VBAT process resistance R 22, R23 dividing potential drop, cell voltage supervisory signal dividing potential drop is outputed to 47 pin of microprocessor U5; The negative temperature coefficient sensor signal is outputing to 1 pin of microprocessor U5 through the upper stretching VACC of pull-up resistor R26 through low pass RC filter network R28, C30, C27 is the connector terminals esd protection electric capacity of negative temperature coefficient sensor signal.
Be input to the analog input pin of microprocessor after the voltage signal process calculus of differences processing of circuit of pressure transducer processing circuit with pressure transducer output; Microprocessor is through the corresponding signal that drives of output after calculation process, the intelligent H bridge that drives in SC sigmal control pressure regulator valve drive circuit drives the chip action, the H bridge drives the chip output pwm signal, and then it is stable in place to control Electron pressure regulating valve, thereby reaches the function of controlling the LNG Liquefied natural gas whiff pressure.Power circuit provides 5V Power supply and system power-on reset signal for each chip of pressure control circuit inside.In voltage/temperature monitoring circuit, whether the 5V of the main monitoring power supply circuit output of voltage monitoring circuit is stable, so that for analog amount provides reference voltage accurately, temperature monitoring circuit gathers the voltage of negative temperature coefficient temperature coefficient thermistor, and the two-way analog voltage signal of this supervisory circuit output all is input to the analog input pin of microprocessor.The EEPROM memory circuit is connected with the SPI interface of microprocessor, microprocessor deposits the data of key in EEPROM by the SPI interface when regulator is worked in, thereby guarantees the work that the LNG Liquefied natural gas motor is stable.The CAN communicating circuit is exactly mainly CAN signal transmitting and receiving chip; in order to protect the integrity of CAN communication signal; add CAN shielded signal processing circuit; and this signal is drawn out on the terminal of connector assembly; CAN signal transmitting and receiving chip one end is connected with the CAN interface of microprocessor; the other end is connected with the CAN PORT COM of peripheral control unit, forms a node on car load CAN network.The microcontroller circuit core is 8-bit microprocessor, adopt external crystal oscillator to provide stable clock for the pressure regulator circuit, program debugging, download the BDM debugging interface of employing standard, simultaneously the power supply by operational amplifier in outside PNP triode pilot pressure sensor processing circuit.
Claims (8)
1. the LNG Liquefied natural gas engine pressure regulator circuit based on CAN communication, be comprised of seven parts such as power circuit, pressure transducer processing circuit, voltage/temperature monitoring circuit, EEPROM memory circuit, pressure regulator valve drive circuit, CAN communicating circuit, microprocessors, it is characterized in that: the LNG Liquefied natural gas pressure signal outputs in circuit in the pressure transducer processing circuit, the pressure transducer processing circuit is connected with microprocessor, power circuit is connected with microprocessor, voltage/temperature monitoring circuit is connected with microprocessor, EEPROM memory circuit and microprocessor are interconnected, microprocessor is connected with the pressure electromagnetic valve for adjusting by the pressure regulator valve drive circuit, CAN communicating circuit and microprocessor are interconnected, wherein the Electron pressure regulating valve drive circuit carries out communication by CAN communicating circuit and LNG ECU, microprocessor is controlled the open position of Electron pressure regulating valve in real time by the CAN communicating circuit message that receives, control the whiff pressure of LNG motor.
2. a kind of LNG Liquefied natural gas engine pressure regulator circuit based on CAN communication described according to claim 1, it is characterized in that the powered battery signal process bi-directional voltage stabilizing diode D1 in described power circuit, port esd protection capacitor C 6, R6, the low pass RC filter network that C7 forms, power supply signal is input to 1 pin of power supply chip U2, the 5 pin output 5V power supply signal VCC of power supply chip U2, VCC is through reference diode D2, filter capacitor C16, C17, the power supply signal of stable output after processing, 4 pin of power supply chip U2 are connected with capacitor C 13, the 2 pin output system power-on reset signals of power supply chip U2 are connected with input 8 pins that reset of microprocessor U5 by resistance R 1.
3. a kind of LNG Liquefied natural gas engine pressure regulator circuit based on CAN communication described according to claim 1, it is characterized in that the difference output of described pressure transducer processing circuit U1 differential pressure transducer 4 pin and 2 pin is through R7, R8, after the differential filtering circuit that C9 forms, through power supply chip U4:2 differential amplification, VACC provides stable voltage bias through R13 after the R14 dividing potential drop, power supply chip U4:1 is converted into Single-end output after power supply chip U4:2 input voltage secondary is amplified.
4. a kind of LNG Liquefied natural gas engine pressure regulator circuit based on CAN communication described according to claim 1,4 pin, 30 pin, 43 pin that it is characterized in that described microprocessor U5 meet VCC, 5 pin of U5,29 pin, 42 pin meet GND, and C5, C20, C14 meet respectively VCC and GND as the decoupling capacitor of 4 pin of U5,30 pin, three power pins of 43 pin; 6,7 pin of U5 are connected to coupling crystal oscillator Y1 and resistance R 2, and by capacitor C 2, C3 ground connection; Reset signal is connected with input 8 pin that reset of U5 by resistance R 1, and 8 pin of U5 are by moving VCC on resistance R 5, by capacitor C 4 ground connection simultaneously; 9 pin of U5 are realized the function of control simulation power supply VACC power supply by resistance R 3, R4 and PNP triode Q1; 33 pin of U5 connect by moving VCC on resistance R 19 1 pin that program is downloaded connector assembly simultaneously.
5. a kind of LNG Liquefied natural gas engine pressure regulator circuit based on CAN communication described according to claim 1, is characterized in that 7,8 pin of the memory chip U3 of described EEPROM memory circuit are connected with VCC, passes through simultaneously filter capacitor C8 ground connection; 1 pin of U3 is connected with 10 pin of microprocessor U5 by moving VCC on resistance R 9 simultaneously, and 2,3,5,6 pin of U3 are connected with 16,17,15,14 pins of microprocessor U5 respectively, realize the SPI communication interface; The 4 pin ground connection of U3.
6. a kind of LNG Liquefied natural gas engine pressure regulator circuit based on CAN communication described according to claim 1, is characterized in that 3 pin of the transceiving chip U7 in described CAN communicating circuit are connected with VCC, passes through simultaneously filter capacitor C24 ground connection; 1 pin of U7,4 pin are connected with CAN communication interface pin 21 pin, 22 pin of microprocessor U5 by resistance R 31, R32 respectively; 8 pin of U7 pull down to ground by resistance R 33, are connected with 20 pin of microprocessor U5 simultaneously; The 7 pin CAN of U7 are high, 6 pin CAN are low is connected with 2 pin, 3 pin of connector assembly respectively, and 7 pin, 6 pin of while U7 connect respectively Transient Suppression Diode D4 and capacitor C 22, C25, D4, C22, the equal ground connection of the C25 the other end; R21, R24, R25 connect respectively that CAN is high, CAN is low, the CAN shielded signal, consist of CAN communicating terminal resistor network.
7. a kind of LNG Liquefied natural gas engine pressure regulator circuit based on CAN communication described according to claim 1,4 pin, 5 pin, 16 pin that it is characterized in that the H bridge driving chip U6 in described pressure regulator valve drive circuit are connected with powered battery signal VBAT, and filter capacitor C21 is connected with ground with VBAT simultaneously; 1 pin of H bridge driving chip U6,8 pin, 9 pin, 10 pin, 11 pin, 12 pin, 20 pin are ground connection all; Input signal 3 pin of U6,19 pin are connected with 26 pin, 25 pin of microprocessor U5 respectively; Enable signal 13 pin of U6 are connected with 19 pin of microprocessor U5; Cut-off signals 18 pin of U6 are connected with 18 pin of microprocessor chip U5; Status Flag 2 pin of U6 are connected with 24 pin of microprocessor chip U5, and by moving 5V power supply signal VCC on resistance R 27 to, shunt capacitance C29 is connected with ground with VCC simultaneously; 14,15 pin of U6 are output drive signals 2, connect the anode of solenoid valve, and capacitor C 28 is the esd protection electric capacity of the corresponding connector assembly of solenoid valve anode; 6,7 pin of U6 are output drive signals 1, connect the negative terminal of solenoid valve, and capacitor C 31 is the esd protection electric capacity of the corresponding connector assembly of negative terminal; Chip selection signal 17 pin of U6 need not, unsettled.
8. a kind of LNG Liquefied natural gas engine pressure regulator circuit based on CAN communication described according to claim 1, the battery voltage signal VBAT that it is characterized in that described voltage/temperature monitoring circuit output to 47 pin of microprocessor U5 with cell voltage supervisory signal dividing potential drop after through resistance R 22, R23 dividing potential drop; The negative temperature coefficient sensor signal is outputing to 1 pin of microprocessor U5 through the upper stretching VACC of pull-up resistor R26 through low pass RC filter network R28, C30, C27 is the connector terminals esd protection electric capacity of negative temperature coefficient sensor signal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205677838U CN202937357U (en) | 2012-11-01 | 2012-11-01 | Pressure regulator circuit of LNG (liquefied natural gas) engine base on CAN (controller area network) communication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205677838U CN202937357U (en) | 2012-11-01 | 2012-11-01 | Pressure regulator circuit of LNG (liquefied natural gas) engine base on CAN (controller area network) communication |
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| CN202937357U true CN202937357U (en) | 2013-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012205677838U Expired - Lifetime CN202937357U (en) | 2012-11-01 | 2012-11-01 | Pressure regulator circuit of LNG (liquefied natural gas) engine base on CAN (controller area network) communication |
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| CN (1) | CN202937357U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103296025A (en) * | 2013-05-22 | 2013-09-11 | 深圳市共进电子股份有限公司 | ESD (electro-static discharge) protection circuit for integrated circuit chips on circuit board |
| CN103674356A (en) * | 2013-11-30 | 2014-03-26 | 成都国科海博信息技术股份有限公司 | Pressure sensor with long service life and high sensitivity |
-
2012
- 2012-11-01 CN CN2012205677838U patent/CN202937357U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103296025A (en) * | 2013-05-22 | 2013-09-11 | 深圳市共进电子股份有限公司 | ESD (electro-static discharge) protection circuit for integrated circuit chips on circuit board |
| CN103674356A (en) * | 2013-11-30 | 2014-03-26 | 成都国科海博信息技术股份有限公司 | Pressure sensor with long service life and high sensitivity |
| CN103674356B (en) * | 2013-11-30 | 2015-09-09 | 成都国科海博信息技术股份有限公司 | Long service life and the high pressure transducer of susceptibility |
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Granted publication date: 20130515 |