CN103603735B - A kind of CNG automobile fuel gas supply supervisory system and method - Google Patents
A kind of CNG automobile fuel gas supply supervisory system and method Download PDFInfo
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- CN103603735B CN103603735B CN201310573863.3A CN201310573863A CN103603735B CN 103603735 B CN103603735 B CN 103603735B CN 201310573863 A CN201310573863 A CN 201310573863A CN 103603735 B CN103603735 B CN 103603735B
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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Abstract
The embodiment of the invention discloses a kind of CNG automobile fuel gas supply supervisory system and method, this system comprises: leak sensor, finished vehicle electronic control unit, first switch and second switch, wherein, described second switch comprises the first output terminal and the second output terminal, and the first output terminal is connected with petrol jet, and the second output terminal is connected with the gas nozzle of gas supply system.This system the concentration of combustion gas can be not more than the predefined value in finished vehicle electronic control unit around gas supply system, and during CNG automobile satisfied use gas condition, control described second switch and switch to the second output terminal, use combustion gas as automotive fuel, otherwise, control described second switch and switch to the first output terminal, use gasoline as automotive fuel, the real-time monitoring to CNG automobile gas supply system is realized with this, and when gas leakage appears in CNG automobile gas supply system, timely cut-out fuel gas supply, improves the security protection performance of described CNG automobile.
Description
Technical field
The present invention relates to CNG automobile technical field, particularly relate to a kind of CNG automobile fuel gas supply supervisory system and method.
Background technique
CNG(CompressedNaturalGas) automobile refers to using compressed natural gas and substitutes regular price gasoline or the diesel oil automobile as automotive fuel.
As shown in Figure 1, the gas supply system in current CNG automobile generally comprises: gas cylinder 1, stores rock gas in described gas cylinder 1; By the cylinder valve 3 that high-voltage tube 2 is connected with described gas cylinder 1; By the gas charging valve 5 that high-voltage tube 4 is connected with described cylinder valve 3; By the decompressor 6 that high-voltage tube is connected with described gas charging valve 5; By the filter 8 that low-voltage tube 7 is connected with described decompressor 6; By the gas rail pressure sensor 10 that low-voltage tube 9 is connected with described filter 8; By the gas nozzle 11 that low-voltage tube is connected with described gas rail pressure sensor 10.Wherein, described cylinder valve 3 controls its opening and closing by Twoway valves controller, and described decompressor 6 is by its opening and closing of decompressor electromagnetic valve.
When described CNG automobile uses rock gas as automotive fuel, described cylinder valve 3 is opened, and the rock gas in described gas cylinder 1 through gas charging valve 5, the gentle rail pressure sensor 10 of decompressor 6, sprays from described gas nozzle 11 successively, be supplied to described CNG automobile, as automotive fuel.
But CNG, as the hazardous gas of a kind of easy firing, blast, while offering convenience, too increases the danger of CNG automobile to traffic.Therefore, how to monitor CNG automobile gas supply system, and when gas leakage appears in described gas supply system, cut off fuel gas supply in time, prevent the generation of the accident such as automobile burning, blast, become the research emphasis of CNG automobile safety protection.
Summary of the invention
For solving the problems of the technologies described above, embodiments provide a kind of CNG automobile fuel gas supply supervisory system and method, to realize the real-time monitoring to described CNG automobile gas supply system, and when gas leakage appears in described CNG automobile gas supply system, timely cut-out fuel gas supply, prevent the generation of the accident such as automobile burning, blast, improve the security protection performance of described CNG automobile.
For achieving the above object, following technological scheme is embodiments provided:
A kind of CNG automobile fuel gas supply supervisory system, described CNG automobile comprises: power supply, oil-gas switch switch, petrol jet and gas supply system, and described supervisory system comprises:
Gas concentration around described gas supply system is carried out to the leak sensor detected in real time, and described leak sensor is connected with described power supply;
The finished vehicle electronic control unit be connected with described leak sensor, and described finished vehicle electronic control unit is connected with described gas supply system;
The first switch that control end is all connected with described finished vehicle electronic control unit and second switch, described second switch comprises the first output terminal and the second output terminal;
Wherein, the input end of described first switch is connected with power supply, and input end, the gas supply system of output terminal and second switch are connected; First output terminal of described second switch is connected with petrol jet, and the second output terminal is connected with the gas nozzle of described gas supply system;
When described first switch is closed, when described leak sensor detects that the concentration of combustion gas around described gas supply system is not more than the predefined value in described finished vehicle electronic control unit, and during described CNG automobile satisfied use gas condition, described finished vehicle electronic control unit controls described second switch and switches to the second output terminal, otherwise second switch switches to the first output terminal described in described full-vehicle control unit controls.
Preferably, described leak sensor to be arranged in described gas supply system between gas cylinder and cylinder valve directly over high-voltage tube.
Preferably, described finished vehicle electronic control unit is connected with described gas supply system and comprises:
Described finished vehicle electronic control unit is connected with the gas rail pressure sensor in described gas supply system;
Described finished vehicle electronic control unit is connected with the Twoway valves controller in described gas supply system;
Described finished vehicle electronic control unit is connected with the decompressor solenoid valve in described gas supply system;
Described finished vehicle electronic control unit is connected with the gas nozzle in described gas supply system.
Preferably, described decompressor solenoid valve is connected with described finished vehicle electronic control unit by the 3rd switch, and wherein, the control end of described 3rd switch is connected with described finished vehicle electronic control unit, input end is connected with described power supply, and output terminal is connected with described decompressor solenoid valve.
Preferably, described first switch is the first relay, and described second switch is the second relay, and described 3rd switch is the 3rd relay.
Preferably, described CNG automobile is satisfied comprises by gas condition:
What described finished vehicle electronic control unit received that described oil-gas switch switch sends uses gas demand signal;
Described finished vehicle electronic control unit detects that the engine water temperature of described CNG automobile is greater than preset temperature;
Described finished vehicle electronic control unit detects that the engine speed of described CNG automobile is greater than preset rotation speed.
Preferably, described supervisory system also comprises: the warning device be connected with described finished vehicle electronic control unit.
Preferably, described warning device is beacon or buzzer.
A kind of CNG automobile fuel gas supply monitoring method, is applied to the CNG automobile fuel gas supply supervisory system described in above-mentioned any one, comprises:
Judge whether the gas concentration around gas supply system exceedes predefined value;
Judge whether described CNG automobile meets and use gas condition;
Gas concentration around described gas supply system does not exceed predefined value, and during described CNG automobile satisfied use gas condition, described finished vehicle electronic control unit controls described second switch and switches to the second output terminal, otherwise second switch switches to the first output terminal described in described full-vehicle control unit controls.
Preferably, described CNG automobile is satisfied comprises by gas condition:
What described finished vehicle electronic control unit received that described oil-gas switch switch sends uses gas demand signal;
Described finished vehicle electronic control unit detects that the engine water temperature of described CNG automobile is greater than preset temperature;
Described finished vehicle electronic control unit detects that the engine speed of described CNG automobile is greater than preset rotation speed.
Preferably, also comprise: when the gas concentration around described gas supply system exceedes predefined value, report to the police.
Compared with prior art, technique scheme has the following advantages:
The technological scheme that the embodiment of the present invention provides, comprising: leak sensor, finished vehicle electronic control unit, the first switch that control end is all connected with described finished vehicle electronic control unit and second switch, and described second switch comprises the first output terminal and the second output terminal; Wherein, the input end of described first switch is connected with power supply, and input end, the gas supply system of output terminal and second switch are connected; First output terminal of described second switch is connected with petrol jet, second output terminal is connected with the gas nozzle of described gas supply system, thus when described first switch is closed, utilize described leak sensor to detect the gas concentration around described gas supply system.When described leak sensor detects that the concentration of combustion gas around described gas supply system is not more than the predefined value in described finished vehicle electronic control unit, and during described CNG automobile satisfied use gas condition, described finished vehicle electronic control unit controls described second switch and switches to the second output terminal, use combustion gas as automotive fuel, otherwise, described in described full-vehicle control unit controls, second switch switches to the first output terminal, use gasoline as automotive fuel, the real-time monitoring to described CNG automobile gas supply system is realized with this, and when gas leakage appears in described CNG automobile gas supply system, timely cut-out fuel gas supply, prevent automobile burning, the generation of the accidents such as blast, improve the security protection performance of described CNG automobile.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technological scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of CNG automobile gas supply system in prior art;
The structural representation of the CNG automobile fuel gas supply supervisory system that Fig. 2 provides for the embodiment of the present invention;
The schematic flow sheet of the CNG automobile fuel gas supply monitoring method that Fig. 3 provides for the embodiment of the present invention.
Embodiment
Just as described in the background section, how to monitor CNG automobile gas supply system, and when gas leakage appears in described gas supply system, cut off fuel gas supply in time, prevent the generation of the accident such as automobile burning, blast, become the research emphasis of CNG automobile safety protection.
In view of this, embodiments provide a kind of CNG automobile fuel gas supply supervisory system, described CNG automobile comprises: power supply, oil-gas switch switch, petrol jet and gas supply system, and described supervisory system comprises:
Gas concentration around described gas supply system is carried out to the leak sensor detected in real time, and described leak sensor is connected with described power supply;
The finished vehicle electronic control unit be connected with described leak sensor, and described finished vehicle electronic control unit is connected with described gas supply system;
The first switch that control end is all connected with described finished vehicle electronic control unit and second switch, described second switch comprises the first output terminal and the second output terminal;
Wherein, the input end of described first switch is connected with power supply, and input end, the gas supply system of output terminal and second switch are connected; First output terminal of described second switch is connected with petrol jet, and the second output terminal is connected with the gas nozzle of described gas supply system;
When described first switch is closed, when described leak sensor detects that the concentration of combustion gas around described gas supply system is not more than the predefined value in described finished vehicle electronic control unit, and during described CNG automobile satisfied use gas condition, described finished vehicle electronic control unit controls described second switch and switches to the second output terminal, otherwise second switch switches to the first output terminal described in described full-vehicle control unit controls.
Accordingly, the embodiment of the present invention additionally provides a kind of CNG automobile fuel gas supply monitoring method, is applied to above-mentioned CNG automobile fuel gas supply supervisory system, comprises:
Judge whether the gas concentration around gas supply system exceedes predefined value;
Judge whether described CNG automobile meets and use gas condition;
Gas concentration around described gas supply system does not exceed predefined value, and during described CNG automobile satisfied use gas condition, described finished vehicle electronic control unit controls described second switch and switches to the second output terminal, otherwise second switch switches to the first output terminal described in described full-vehicle control unit controls.
The technological scheme that the embodiment of the present invention provides, can when described first switch be closed, described leak sensor is utilized to detect the gas concentration around described gas supply system, when described leak sensor detects that the concentration of combustion gas around described gas supply system is not more than the predefined value in described finished vehicle electronic control unit, and during described CNG automobile satisfied use gas condition, described finished vehicle electronic control unit controls described second switch and switches to the second output terminal, use combustion gas as automotive fuel, otherwise, described in described full-vehicle control unit controls, second switch switches to the first output terminal, use gasoline as automotive fuel, the real-time monitoring to described CNG automobile gas supply system is realized with this, and when gas leakage appears in described CNG automobile gas supply system, timely cut-out fuel gas supply, prevent automobile burning, the generation of the accidents such as blast, improve the security protection performance of described CNG automobile.
For enabling above-mentioned purpose of the present invention, feature and advantage more become apparent, and are described in detail the specific embodiment of the present invention below in conjunction with accompanying drawing.
Set forth detail in the following description so that fully understand the present invention.But the present invention can be different from alternate manner described here to implement with multiple, those skilled in the art can when without prejudice to doing similar popularization when intension of the present invention.Therefore the present invention is not by the restriction of following public concrete enforcement.
As shown in Figure 2, embodiments provide a kind of CNG automobile fuel gas supply supervisory system, described CNG automobile comprises: power supply, oil-gas switch switch, petrol jet and gas supply system, and described supervisory system comprises: the first switch that leak sensor, finished vehicle electronic control unit, control end are all connected with described finished vehicle electronic control unit and second switch.
Wherein, described leak sensor is arranged at around described gas supply system, for detecting the gas concentration around described gas supply system, and the gas concentration around the gas supply system detected is converted to voltage signal exports to finished vehicle electronic control unit.
Due in described gas supply system, gas cylinder, cylinder valve and the high-voltage tube connecting described gas cylinder and cylinder valve are arranged on automobile trunk, belong to region sluggish in air circulation, therefore, in one embodiment of the invention, described leak sensor is preferably arranged in automobile trunk, and directly over the high-voltage tube being positioned at described gas cylinder, cylinder valve and connecting described gas cylinder and cylinder valve, so that monitor the gas leakage situation of described gas supply system.
It should be noted that, in embodiments of the present invention, described leak sensor is also connected with power supply, thus utilizes described power supply to provide voltage signal for described leak sensor, ensures that described leak sensor carries out Real-Time Monitoring to described gas supply system.
Described finished vehicle electronic control unit is provided with leak sensor signal input part (pin a3), fuel gas supply signal output part, wherein, described leak sensor signal input part (pin a3) is connected with the output terminal of described leak sensor, described fuel gas supply signal output part is connected with gas supply system, thus according to the voltage signal that described leak sensor exports, judge around described gas supply system, whether gas concentration exceedes predefined value, when around described gas supply system, gas concentration exceedes predefined value, control described gas supply system by described fuel gas supply signal output part and cut off fuel gas supply, described CNG automobile is made to utilize gasoline as fuel.
Described finished vehicle electronic control unit is also provided with the first switching signal output terminal (pin b2), second switch signal output part (pin c1) and voltage signal inputs (pin b1), wherein, described first switching signal output terminal (pin b2) is connected with the control end of the first switch, described second switch signal output part (pin c1) is connected with the control end of described second switch, described voltage signal inputs (pin b1) is connected with power supply, for described finished vehicle electronic control unit provides operating voltage.And the input end of described first switch is connected with power supply, input end and the gas supply system of output terminal and described second switch are connected; Described second switch comprises the first output terminal and the second output terminal, and described first output terminal is connected with petrol jet, and the second output terminal is connected with the gas nozzle of described gas supply system.
In addition, described finished vehicle electronic control unit is also provided with: the oil gas signal input part be connected with oil-gas switch switch, the petrol jet signal output part (pin b3) be connected with petrol jet, key signal input part (pin c4), engine rotational speed signal input end (pin c3) and engine water temperature signal input part (pin c2).
Wherein, described oil gas signal input part comprises: with oily demand signal input end (pin d3) with gas demand signal input end (pin d2), when described oil-gas switch switching over extremely uses oil condition, described oil-gas switch switch inputs one by described use oily demand signal input end (pin d3) to described finished vehicle electronic control unit and uses oily demand signal, when described oil-gas switch switching over extremely uses gaseity, described oil-gas switch switch is by described gas demand signal input end (pin d2), input one to described finished vehicle electronic control unit and use gas demand signal.
Described key signal input part (pin c4) is connected with automobile key, for receiving the input signal of automobile key.Described engine rotational speed signal input end (pin c3) is connected with described engine rotation speed sensor, for detecting the rotating speed of motor in real time, described engine water temperature signal input part (pin c2) is connected with described engine water temperature sensor, for detecting the water temperature of motor in real time.
It should be noted that, the input signal of CNG automobile key generally includes: ON signal, START signal and OFF signal.When the key signal that the key signal input part (pin c4) of described finished vehicle electronic control unit receives is OFF signal, described finished vehicle electronic control unit does not work, and described CNG automobile is in non-starting state, when the signal that the key signal input part (pin c4) of described finished vehicle electronic control unit receives is ON signal, described finished vehicle electronic control unit is by described first switching signal output terminal (pin b2), control described first switch to close, be communicated with the path between described power supply and gas supply system, finished vehicle electronic control unit, second switch, utilize that described power supply is described gas supply system, finished vehicle electronic control unit and second switch provide operating voltage, make described CNG automobile be in state to be launched, when the key signal that the key signal input part (pin c4) of described finished vehicle electronic control unit receives is START signal, described finished vehicle electronic control unit controls described second switch and closes, be communicated with described finished vehicle electronic control unit, gas nozzle in petrol jet or described gas supply system, path between second switch and power supply, described petrol jet is utilized to provide fuel for described CNG automobile, or utilize the gas nozzle in described gas supply system to provide fuel for described CNG automobile, ensure that described CNG automobile is in starting state, i.e. travelling state.
Concrete, when the signal that the key signal input part (pin c4) of described finished vehicle electronic control unit receives is ON signal, described finished vehicle electronic control unit is by described first switching signal output terminal (pin b2), control described first switch to close, be communicated with the path between described power supply and gas supply system, finished vehicle electronic control unit, second switch, utilize that described power supply is described gas supply system, finished vehicle electronic control unit and second switch provide operating voltage, make described CNG automobile be in state to be launched.
Then, the voltage signal that described finished vehicle electronic control unit receives according to described leak sensor signal input part (pin a3), judges whether the gas concentration around described gas supply system exceedes predefined value.
When gas concentration around described gas supply system exceedes predefined value, no matter described finished vehicle electronic control unit detects whether described CNG automobile meets is used gas condition, described finished vehicle electronic control unit is all by described second switch signal output part (pin c1), control described second switch and switch to the first output terminal, be communicated with described power supply, path between petrol jet and finished vehicle electronic control unit, utilize described petrol jet to provide fuel for described CNG automobile.
When gas concentration around described gas supply system does not exceed predefined value, utilizing described finished vehicle electronic control unit to judge, whether described CNG automobile meets uses gas condition.If described finished vehicle electronic control unit detects that described CNG automobile does not meet and uses gas condition, then described finished vehicle electronic control unit is by described second switch signal output part (pin c1), control described second switch and switch to the first output terminal, be communicated with described power supply, path between petrol jet and finished vehicle electronic control unit, utilize described petrol jet to provide fuel for described CNG automobile.If described finished vehicle electronic control unit detects that described CNG automobile meets and uses gas condition, then described finished vehicle electronic control unit is by described second switch signal output part (pin c1), control described second switch and switch to the second output terminal, be communicated with described power supply, path between gas nozzle and finished vehicle electronic control unit, utilize the gas nozzle in described gas supply system to provide fuel for described CNG automobile.
As from the foregoing, only when described first switch is closed, when described leak sensor detects that the concentration of combustion gas around described gas supply system is not more than the predefined value in described finished vehicle electronic control unit, and during described CNG automobile satisfied use gas condition, described finished vehicle electronic control unit just controls described second switch and switches to the second output terminal, gas nozzle is utilized to provide fuel for described CNG automobile, otherwise, described full-vehicle control unit all controls described second switch and switches to the first output terminal, utilizes petrol jet to provide fuel for described CNG automobile.
In one embodiment of the invention, described CNG automobile meets and comprises by gas condition: described finished vehicle electronic control unit receives described oil-gas switch switch and sends and use gas demand signal; Described finished vehicle electronic control unit detects that the engine water temperature of described CNG automobile is greater than preset temperature; Described finished vehicle electronic control unit detects that the engine speed of described CNG automobile is greater than preset rotation speed.
In this embodiment, first, described finished vehicle electronic control unit is judged the signal that described oil-gas switch switch sends by oil gas signal input part, when described oil gas signal input part receives signal that described oil-gas switch switch sends for during with gas demand signal, described finished vehicle electronic control unit detects the water temperature of described motor by described engine water temperature signal input part (pin c2), when the water temperature signal of the motor that described engine water temperature signal input part (pin c2) receives is greater than preset temperature, described finished vehicle electronic control unit detects the rotating speed of described motor by described engine rotational speed signal input end (pin c3), when the engine rotational speed signal that described engine rotational speed signal input end (pin c3) receives is greater than preset rotation speed, then described CNG automobile is satisfied uses gas condition.Namely, only have described finished vehicle electronic control unit receive described oil-gas switch switch send with gas demand signal, described finished vehicle electronic control unit detect the engine water temperature of described CNG automobile be greater than preset temperature and described finished vehicle electronic control unit detect the engine speed of described CNG automobile be greater than preset rotation speed three conditions all meet time, described CNG automobile just meets use gas condition, otherwise described CNG automobile is satisfied uses gas condition.
In one embodiment of the invention, described finished vehicle electronic control unit is connected with described gas supply system and comprises: described finished vehicle electronic control unit is connected with the gas rail pressure sensor in described gas supply system; Described finished vehicle electronic control unit is connected with the Twoway valves controller in described gas supply system; Described finished vehicle electronic control unit is connected with the decompressor solenoid valve in described gas supply system; Described finished vehicle electronic control unit is connected with the gas nozzle in described gas supply system.
In this embodiment, described finished vehicle electronic control unit is provided with: gas rail pressure sensor signal input end (pin a1), gas rail pressure sensor signal output terminal (pin d4), Twoway valves controller signals output terminal (pin a2), decompressor solenoid valve signal output part (pin a4) and gas nozzle signal output part (pin b4).
When described leak sensor detects that the concentration of combustion gas around described gas supply system is not more than the predefined value in described finished vehicle electronic control unit, and during described CNG automobile satisfied use gas condition, described finished vehicle electronic control unit is first by described Twoway valves controller signals output terminal (pin a2), the cylinder valve utilizing described Twoway valves controller to control in described gas supply system is opened, and by described gas rail pressure sensor signal output terminal (pin d4) for described gas rail pressure sensor provides operating voltage, then, by described decompressor solenoid valve signal output part (pin a4), decompressor described in described decompressor electromagnetic valve is utilized to open, finally, by described gas rail pressure sensor signal input end (pin a1), receive the output voltage signal of described gas rail pressure sensor, and when the output voltage signal of described gas rail pressure sensor is normal, control second switch and switch to the second output terminal, then by described gas nozzle signal output part (pin b4), controlling described gas nozzle for described CNG automobile provides fuel.
In another embodiment of the present invention, described decompressor solenoid valve is connected with described finished vehicle electronic control unit by the 3rd switch, wherein, the control end of described 3rd switch is connected with described finished vehicle electronic control unit, input end is connected with described power supply, and output terminal is connected with described decompressor solenoid valve.In this embodiment, when stating after finished vehicle electronic control unit utilizes cylinder valve described in described Twoway valves controller opens, again judge whether signal that described leak sensor signal input part (pin a3) receives is greater than the predefined value in described finished vehicle electronic control unit, when the signal that described leak sensor signal input part (pin a3) receives is not more than the predefined value in described finished vehicle electronic control unit, described finished vehicle electronic control unit controls described 3rd switch by decompressor solenoid valve signal output part (pin a4) and closes, be communicated with described decompressor solenoid valve, path between 3rd switch and finished vehicle electronic control unit, realization utilizes described decompressor solenoid valve to open decompressor.
It should be noted that, in the process that described CNG automobile travels, described leak sensor carries out Real-Time Monitoring to the gas concentration around described gas supply system, and converts thereof into voltage signal and export to finished vehicle electronic control unit.When the signal that the leak sensor signal input part of described finished vehicle electronic control unit receives is greater than the predefined value in described finished vehicle electronic control unit, described finished vehicle electronic control unit controls described second switch at once and switches to the first output terminal, and described CNG automobile switches to oil work.
In a preferred embodiment of the invention, described first switch is the first relay, described second switch is the second relay, described 3rd switch is the 3rd relay, but the present invention does not limit this, in other embodiments of the invention, described first switch, second switch and the 3rd switch can be also other constructions of switch, are determined on a case-by-case basis.
In yet another embodiment of the present invention, described supervisory system also comprises: the warning device be connected with described finished vehicle electronic control unit.In this embodiment, described finished vehicle electronic control unit is also provided with gas leakage alarm signal output part (pin d1), when described finished vehicle electronic control unit is by described leak sensor, when the gas concentration detecting around described gas supply system exceedes predefined value, described finished vehicle electronic control unit is by gas leakage alarm signal output part (pin d1), for described warning device provides voltage signal, described warning device starts to report to the police.
It should be noted that, described warning device can be beacon, and also can be buzzer, can also be other warning devices, the present invention limit this, is determined on a case-by-case basis.
Be described below in conjunction with the working procedure of specific embodiment to CNG automobile fuel gas supply supervisory system provided by the present invention.In this embodiment, described supply voltage is 12V, the operating voltage that described finished vehicle electronic control unit provides for described gas rail pressure sensor is 5V, the voltage signal that described finished vehicle electronic control unit provides for described warning device is also 5V, predefined value in described finished vehicle electronic control unit is 3V, described default water temperature is 50 DEG C, and described preset rotation speed is 1500 revs/min, and described finished vehicle electronic control unit is car load ECU.
When the signal that the key signal input part (pin c4) of described finished vehicle electronic control unit receives is ON signal, described leak sensor sends voltage signal to described finished vehicle electronic control unit, when described finished vehicle electronic control unit is 0-3V by the voltage signal that described leak sensor signal input part (pin a3) receives, illustrate that gas concentration around described gas supply system is in safety range, No leakage alarm, described warning device does not work.When described finished vehicle electronic control unit is 3V-5V by the voltage signal that described leak sensor signal input part (pin a3) receives, illustrate that gas concentration around described gas supply system is not in safety range, described finished vehicle electronic control unit sends leakage alarm signal by described leakage alarm signal output part (pin d1), and described warning device starts to report to the police.
When the signal that the key signal input part (pin c4) of described finished vehicle electronic control unit receives just has switched to START signal by ON signal, engine speed due to described CNG automobile is zero, then no matter with or without leakage alarm, the input end that described finished vehicle electronic control unit all controls described second switch signal is communicated with the first output terminal, described petrol jet work, described CNG automobile ignition trigger.
After the signal switching received when the key signal input part (pin c4) of described finished vehicle electronic control unit is START signal, namely after described CNG automobile ignition trigger completes, when described finished vehicle electronic control unit receives use gas demand signal (i.e. use gas demand signal input end (pin d2) of described finished vehicle electronic control unit, receive the 12V voltage signal that described oil-gas switch switch sends) time, first described finished vehicle electronic control unit is utilized to determine whether leakage alarm, if any leakage alarm, then maintain petrol jet work.
As there is no leakage alarm, whether described engine water temperature meets the condition being greater than 50 DEG C then to utilize described finished vehicle electronic control unit to judge, if met, whether the rotating speed of described motor meets the condition being greater than 1500 revs/min then to continue to utilize described finished vehicle electronic control unit to judge, if met, then utilize described finished vehicle electronic control unit to control cylinder valve by described Twoway valves controller to open, and opened by decompressor electromagnetic valve decompressor, then the voltage signal that described gas rail pressure sensor sends is received, and when the voltage signal that described gas rail pressure sensor sends is normal (as 4V-5V), control described second switch to switch to input end and be communicated with the second output terminal, described gas nozzle work.
After described CNG automobile switches to and utilizes gas nozzle work, in the process that described CNG automobile travels, utilize described leak sensor to carry out Real-Time Monitoring to the gas concentration around described gas supply system, and convert thereof into voltage signal and export to finished vehicle electronic control unit.When the signal that the leak sensor signal input part of described finished vehicle electronic control unit receives is greater than the predefined value in described finished vehicle electronic control unit, described finished vehicle electronic control unit controls described second switch at once and switches to the first output terminal, and described CNG automobile switches to oil work.
As can be seen here, the CNG automobile fuel gas supply supervisory system that the embodiment of the present invention provides can when described first switch be closed, described leak sensor is utilized to detect the gas concentration around described gas supply system, when described leak sensor detects that the concentration of combustion gas around described gas supply system is not more than the predefined value in described finished vehicle electronic control unit, and during described CNG automobile satisfied use gas condition, described finished vehicle electronic control unit controls described second switch and switches to the second output terminal, use combustion gas as automotive fuel, otherwise, described in described full-vehicle control unit controls, second switch switches to the first output terminal, use gasoline as automotive fuel, the real-time monitoring to described CNG automobile gas supply system is realized with this, and when gas leakage appears in described CNG automobile gas supply system, timely cut-out fuel gas supply, prevent automobile burning, the generation of the accidents such as blast, improve the security protection performance of described CNG automobile.
Accordingly, the embodiment of the present invention additionally provides a kind of CNG automobile fuel gas supply monitoring method, is applied to the CNG automobile fuel gas supply supervisory system described in above-mentioned any embodiment, as shown in Figure 3, comprises:
When described CNG automobile is in state to be launched, namely described CNG automobile key is in ON state, described first switch closes, and judges whether the gas concentration around gas supply system exceedes predefined value, namely with or without leakage alarm, if when the gas concentration around described gas supply system exceedes predefined value, namely leakage alarm is had, then warning device work, if when the gas concentration around described gas supply system does not exceed predefined value, namely No leakage is reported to the police, then warning device does not work.
When described CNG automobile be in switch to starting state by state to be launched time, when namely described CNG automobile key switches to START state by ON state, the work of described CNG automobile oil.
When described CNG automobile is in starting state, namely described CNG automobile key is in START state, and when the gas concentration around described gas supply system does not exceed predefined value (No leakage warning), then judges whether described CNG automobile meets and use gas condition.
When described CNG automobile meets by gas condition, then open the cylinder valve in described gas supply system.
In one embodiment of the invention, described CNG automobile is satisfied comprises by gas condition: receive and use gas request; The engine water temperature of described CNG automobile is greater than preset temperature; The engine speed of described CNG automobile is greater than preset rotation speed.Concrete, when No leakage is reported to the police, first judge whether to receive and use gas request; When receiving with gas request, judge whether the engine water temperature of described CNG automobile is greater than preset temperature; When the engine water temperature of described CNG automobile is greater than preset temperature, judge whether the engine speed of described CNG automobile is greater than preset rotation speed.When the engine speed of described CNG automobile is greater than preset rotation speed, start described gas supply system, open the cylinder valve in described gas supply system.
When opening the cylinder valve in described gas supply system, again judge whether the gas concentration around gas supply system exceedes predefined value.If the gas concentration around described gas supply system exceedes predefined value not yet, then open the decompressor in described gas supply system, otherwise close cylinder valve, the work of described CNG automobile oil.
After opening the decompressor in described gas supply system, judge that whether the voltage of the gas rail pressure sensor in described gas supply system is normal.If the voltage of the gas rail pressure sensor in described gas supply system is normal, then controls described second switch and switch to the second output terminal, described CNG automobile gas work, otherwise, the work of described CNG automobile oil.
It should be noted that, in the process that described CNG automobile travels, need to carry out Real-Time Monitoring to the gas concentration around described gas supply system, when gas concentration around described gas supply system exceedes predefined value, control described second switch at once and switch to the first output terminal, the work of described CNG automobile oil.
As can be seen here, the CNG automobile fuel gas supply monitoring method that the embodiment of the present invention provides can gas concentration around gas supply system described in Real-Time Monitoring, the concentration of combustion gas around described gas supply system is only had to be not more than predefined value in described finished vehicle electronic control unit, and during described CNG automobile satisfied use gas condition, described finished vehicle electronic control unit controls described second switch and switches to the second output terminal, use combustion gas as automotive fuel, otherwise, described in described full-vehicle control unit controls, second switch switches to the first output terminal, use gasoline as automotive fuel, the real-time monitoring to described CNG automobile gas supply system is realized with this, and when gas leakage appears in described CNG automobile gas supply system, timely cut-out fuel gas supply, prevent automobile burning, the generation of the accidents such as blast, improve the security protection performance of described CNG automobile.
In sum, the CNG automobile fuel gas supply supervisory system that the embodiment of the present invention provides and method, the real-time monitoring to described CNG automobile gas supply system can be realized, and when gas leakage appears in described CNG automobile gas supply system, timely cut-out fuel gas supply, prevent the generation of the accident such as automobile burning, blast, improve the security protection performance of described CNG automobile.
In this specification, various piece adopts the mode of going forward one by one to describe, and what each some importance illustrated is the difference with other parts, between various piece identical similar portion mutually see.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to embodiment illustrated herein, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (11)
1. a CNG automobile fuel gas supply supervisory system, described CNG automobile comprises: power supply, oil-gas switch switch, petrol jet and gas supply system, is characterized in that, described supervisory system comprises:
Gas concentration around described gas supply system is carried out to the leak sensor detected in real time, and described leak sensor is connected with described power supply;
The finished vehicle electronic control unit be connected with described leak sensor, and described finished vehicle electronic control unit is provided with fuel gas supply signal output part, be connected with described gas supply system by described fuel gas supply signal output part;
The first switch that control end is all connected with described finished vehicle electronic control unit and second switch, described second switch comprises the first output terminal and the second output terminal;
Wherein, the input end of described first switch is connected with power supply, and input end, the gas supply system of output terminal and second switch are connected; First output terminal of described second switch is connected with petrol jet, and the second output terminal is connected with the gas nozzle of described gas supply system;
When described first switch is closed, when described leak sensor detects that the concentration of combustion gas around described gas supply system is not more than the predefined value in described finished vehicle electronic control unit, and during described CNG automobile satisfied use gas condition, described finished vehicle electronic control unit controls described second switch and switches to the second output terminal, otherwise, described in described full-vehicle control unit controls, second switch switches to the first output terminal, and when around described gas supply system, gas concentration exceedes predefined value, control described gas supply system by described fuel gas supply signal output part and switch fuel gas supply, described CNG automobile is made to utilize gasoline as fuel.
2. CNG automobile fuel gas supply supervisory system according to claim 1, is characterized in that, described leak sensor to be arranged in described gas supply system between gas cylinder and cylinder valve directly over high-voltage tube.
3. CNG automobile fuel gas supply supervisory system according to claim 1, is characterized in that, described finished vehicle electronic control unit is connected with described gas supply system and comprises:
Described finished vehicle electronic control unit is connected with the gas rail pressure sensor in described gas supply system;
Described finished vehicle electronic control unit is connected with the Twoway valves controller in described gas supply system;
Described finished vehicle electronic control unit is connected with the decompressor solenoid valve in described gas supply system;
Described finished vehicle electronic control unit is connected with the gas nozzle in described gas supply system.
4. CNG automobile fuel gas supply supervisory system according to claim 3, it is characterized in that, described decompressor solenoid valve is connected with described finished vehicle electronic control unit by the 3rd switch, wherein, the control end of described 3rd switch is connected with described finished vehicle electronic control unit, input end is connected with described power supply, and output terminal is connected with described decompressor solenoid valve.
5. CNG automobile fuel gas supply supervisory system according to claim 4, is characterized in that, described first switch is the first relay, and described second switch is the second relay, and described 3rd switch is the 3rd relay.
6. CNG automobile fuel gas supply supervisory system according to claim 1, is characterized in that, described CNG automobile is satisfied to be comprised by gas condition:
What described finished vehicle electronic control unit received that described oil-gas switch switch sends uses gas demand signal;
Described finished vehicle electronic control unit detects that the engine water temperature of described CNG automobile is greater than preset temperature;
Described finished vehicle electronic control unit detects that the engine speed of described CNG automobile is greater than preset rotation speed.
7. the CNG automobile fuel gas supply supervisory system according to any one of claim 1-6, it is characterized in that, described supervisory system also comprises: the warning device be connected with described finished vehicle electronic control unit.
8. CNG automobile fuel gas supply supervisory system according to claim 7, is characterized in that, described warning device is beacon or buzzer.
9. a CNG automobile fuel gas supply monitoring method, is applied to the CNG automobile fuel gas supply supervisory system described in any one of claim 1-8, it is characterized in that, comprising:
Judge whether the gas concentration around gas supply system exceedes predefined value;
Judge whether described CNG automobile meets and use gas condition;
Gas concentration around described gas supply system does not exceed predefined value, and during described CNG automobile satisfied use gas condition, described finished vehicle electronic control unit controls described second switch and switches to the second output terminal, otherwise, described in described full-vehicle control unit controls, second switch switches to the first output terminal, and when around described gas supply system, gas concentration exceedes predefined value, control described gas supply system by fuel gas supply signal output part and switch fuel gas supply, make described CNG automobile utilize gasoline as fuel.
10. automobile fuel gas supplying monitoring method according to claim 9, is characterized in that, described CNG automobile is satisfied to be comprised by gas condition:
What described finished vehicle electronic control unit received that described oil-gas switch switch sends uses gas demand signal;
Described finished vehicle electronic control unit detects that the engine water temperature of described CNG automobile is greater than preset temperature;
Described finished vehicle electronic control unit detects that the engine speed of described CNG automobile is greater than preset rotation speed.
11. automobile fuel gas supplying monitoring methods according to claim 10, is characterized in that, also comprise: when the gas concentration around described gas supply system exceedes predefined value, report to the police.
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| WO2018051159A1 (en) | 2016-09-16 | 2018-03-22 | Carrier Corporation | Fuel system control for refrigeration unit engine |
| WO2020030940A1 (en) | 2018-08-10 | 2020-02-13 | Carrier Corporation | Crash detection system for transport refrigeration units |
| CN111396207B (en) * | 2020-03-31 | 2022-07-15 | 潍柴动力股份有限公司 | Engine injection control method and device |
| CN115402093A (en) * | 2022-09-29 | 2022-11-29 | 东风汽车股份有限公司 | Integrated commercial vehicle gas leakage alarm device and use method thereof |
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