CN103835827B - The guard method of LNG motor ultralow temperature fuel gas temperature - Google Patents

The guard method of LNG motor ultralow temperature fuel gas temperature Download PDF

Info

Publication number
CN103835827B
CN103835827B CN201410074873.7A CN201410074873A CN103835827B CN 103835827 B CN103835827 B CN 103835827B CN 201410074873 A CN201410074873 A CN 201410074873A CN 103835827 B CN103835827 B CN 103835827B
Authority
CN
China
Prior art keywords
ngt
tngt
limit
ect
motor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201410074873.7A
Other languages
Chinese (zh)
Other versions
CN103835827A (en
Inventor
邵思东
周伟伟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Weichai Xigang New Energy Power Co Ltd
Original Assignee
Weichai Xigang New Energy Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Weichai Xigang New Energy Power Co Ltd filed Critical Weichai Xigang New Energy Power Co Ltd
Priority to CN201410074873.7A priority Critical patent/CN103835827B/en
Publication of CN103835827A publication Critical patent/CN103835827A/en
Application granted granted Critical
Publication of CN103835827B publication Critical patent/CN103835827B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

The invention discloses the guard method of a kind of LNG motor ultralow temperature fuel gas temperature, comprise the following steps: the first step, in advance at the water outlet respectively mounting temperature sensor of vaporizer outlets, gas metering valve inlet and motor, correspondence gathers temperature TNGT, NGT and ECT everywhere respectively; Preset TNGT controling parameters value, NGT controling parameters value, ECT controling parameters value respectively; By judging TNGT after second step, Engine ECU power on, carry out engine start protection; 3rd step, read TNGT, NGT and ECT, and by logical operation, judge to carry out motor limit and turn round operation, motor and normally run or engine misses; 4th step, when the 3rd step be motor limit turn round operation or motor normally run time, repeat the 3rd step.The present invention carries out reliable low-temperature protection to the gas supply system of LNG motor, the personal safety preventing LNG motor in use because low temperature brings and economic loss.

Description

The guard method of LNG motor ultralow temperature fuel gas temperature
Technical field
The present invention relates to a kind of LNG engine electronic control system technical field, particularly relate to the guard method of a kind of LNG motor ultralow temperature fuel gas temperature.
Background technique
LNG(LNG Liquefied natural gas) fuel of motor is stored among LNG gas tank with ultra low temperature state, different according to saturation pressure, its temperature range is between-123 DEG C to-162 DEG C.
First LNG needs the gaseous natural gas through the heat vaporized one-tenth of vaporizer with suitable temperature after gas cylinder flows out, then after the heat exchanger on solenoid valve, voltage stabilizer, combustion gas filter cleaner, motor and combustion gas thermostat, enter motor by gas metering valve, the thermal source wherein required for vaporescence comes from circulating water of engine.
It is bad that LNG in use there will be gasification, and the phenomenon that fuel gas temperature is too low, if fuel gas temperature is too low, can affect vehicle security.Because the key components and parts at present on fuel gas pipeline is as solenoid valve, voltage stabilizer, the serviceability temperature scopes such as gas nozzle are generally between-40 DEG C to 120 DEG C, too low fuel gas temperature can cause these component to lose efficacy, and sealing configuration generation leakage can be damaged, or make the circulating water freezing and expansion inside vaporizer cause vaporizer to break, the injury from low temperature of personnel may be caused after the LNG leakage of low temperature, volatilization expanding whole engine compartment can be full of rapidly in addition because LNG leaks in air, likely leaked electricity to igniting by the high-temperature component on motor or ignition system, consequence is very serious, at present the LNG natural gas engine function that not have reliably ultralow temperature fuel gas temperature to protect.
Summary of the invention
Technical problem to be solved by this invention is to provide one; reliable low-temperature protection is carried out to the gas supply system of LNG motor; effectively prevent personal safety and economic loss that LNG motor in use brings because of low temperature, the LNG motor ultralow temperature fuel gas temperature guard method that safety measure is strengthened.
For solving the problems of the technologies described above, technological scheme of the present invention is: the guard method of LNG motor ultralow temperature fuel gas temperature, comprises the following steps
The first step, in advance at the water outlet respectively mounting temperature sensor of vaporizer outlets, gas metering valve inlet and motor, the respectively corresponding water outlet water temperature ECT gathering vaporizer outlets temperature TNGT, gas metering valve inlet temperature NGT and motor; Preset TNGT controling parameters value, NGT controling parameters value, ECT controling parameters value respectively;
By judging TNGT after second step, Engine ECU power on, carry out engine start protection; Wherein, by engine start during described engine start protection, and the 3rd step is proceeded; Not by engine misses during described engine start protection, terminating operation;
3rd step, read TNGT, NGT and ECT, and by TNGT, NGT and ECT by logical operation, judge to carry out motor limit and turn round operation, motor and normally run or engine misses;
4th step, when the 3rd step be motor limit turn round operation or motor normally run time, repeat the 3rd step; When the 3rd step is engine misses, terminating operation.
As preferred technological scheme, the protection of engine start described in described second step comprises:
Read TNGT, TNGT controling parameters value and comprise the too low setting value of TNGT;
Whether judge TNGT≤the too low setting value of TNGT, during the too low setting value of TNGT > TNGT: engine start;
During the too low setting value of TNGT≤TNGT: judge whether to trigger TNGT too low fault, when not triggering the too low fault of TNGT: engine start;
When triggering the too low fault of TNGT: report the too low fault of TNGT and continue to judge whether the too low engine misses function of selection TNGT, when not selecting the too low engine misses function of TNGT: engine start;
When selecting the too low engine misses function of TNGT: engine misses, terminating operation.
As the improvement to technique scheme, logical operation described in described 3rd step comprises TNGT Logic judgment, ECT Logic judgment, ECT are greater than NGT Logic judgment and NGT rate of change Logic judgment under 40 DEG C of warm-up modes;
By described TNGT Logic judgment, export and obtain torque parameter T1, flame-out instruction X1 and normal instructions Z1;
By described ECT Logic judgment, export and obtain torque parameter T2;
Be greater than NGT Logic judgment under 40 DEG C of warm-up modes by described ECT, export and obtain torque parameter T3, flame-out instruction X3 and normal instructions Z3;
By described NGT rate of change Logic judgment, export and obtain torque parameter T4, flame-out instruction X4 and normal instructions Z4;
According to above-mentioned parameter, show that motor limit is turned round operation, motor and normally run or the operational order of engine misses; Wherein: motor limit is turned round Operational Limits=irreducible minimum and turned round parameter MIN (torque parameter T1, torque parameter T2, torque parameter T3, torque parameter T4), the normal operating instruction of motor=each normal instructions and computing (normal instructions Z1* normal instructions Z3* normal instructions Z4), the process of engine misses instruction=each flame-out instruction or computing (flame-out instruction X1+ stop working instruction X3+ stop working instruction X4).
As the further improvement to technique scheme, described TNGT Logic judgment comprises:
Read TNGT, described TNGT controling parameters value comprises TNGT limit and turns round parameter value, the too low fault parameter value of TNGT;
Judge whether that triggering TNGT limits twisting die formula, when not triggering TNGT limit twisting die formula, directly export normal instructions Z1;
Trigger TNGT when limitting twisting die formula, judge whether to trigger TNGT too low fault, when not triggering the too low fault of TNGT, turn round export ratio output torque parameter T1 according to TNGT and limit;
When triggering the too low fault of TNGT, report the too low fault of TNGT and continue to judge whether to select the too low engine misses function of TNGT, when not selecting the too low engine misses function of TNGT, exporting the torque parameter T1 limitting and turn round 20%;
When selecting the too low engine misses function of TNGT, export flame-out instruction X1.
As the further improvement to technique scheme, described ECT Logic judgment comprises:
Read ECT, described ECT controling parameters value comprises ECT limit and turns round parameter value;
Judge whether that triggering ECT limits twisting die formula≤40 DEG C, do not trigger ECT when limitting twisting die formula≤40 DEG C, carry out described ECT and be greater than NGT Logic judgment under 40 DEG C of warm-up modes;
When triggering ECT limit twisting die formula≤40 DEG C, turn round export ratio output torque parameter T2 according to ECT and limit.
As improving especially further technique scheme, under described ECT is greater than 40 DEG C of warm-up modes, NGT Logic judgment comprises:
Read NGT, described NGT controling parameters value comprises NGT limit and turns round parameter value, the too low fault parameter value of NGT;
Judge whether that triggering NGT limits twisting die formula≤0 DEG C, when not triggering NGT limit twisting die formula≤0 DEG C, directly export normal instructions Z3;
Trigger NGT when limitting twisting die formula≤0 DEG C, judge to trigger too low fault≤-20 DEG C of NGT, when not triggering too low fault≤-20 DEG C of NGT, turn round export ratio output torque parameter T3 according to NGT and limit;
When triggering too low fault≤-20 DEG C of NGT, report the too low fault of NGT according to ECT and NGT, judge whether to select the too low engine misses function of NGT, when not selecting the too low engine misses function of NGT, export the torque parameter T3 limitting and turn round 20%;
When selecting the too low engine misses function of NGT, export flame-out instruction X3.
As improving especially further technique scheme, described NGT rate of change Logic judgment comprises:
Read NGT, described NGT controling parameters value comprise NGT rate of change limit turn round parameter value and NGT rate of change severe limit turn round fault parameter value;
Judge whether to trigger NGT rate of change limit twisting die formula, when not triggering NGT rate of change limit twisting die formula, directly export normal instructions Z4;
When triggering NGT rate of change limit twisting die formula, judge whether that triggering NGT rate of change severe limit turns round fault, do not trigger NGT rate of change severe limit when turning round fault, turn round export ratio output torque parameter T4 according to limit;
When triggering NGT rate of change severe limit turns round fault, report NGT severe to limit and turn round fault and continue to judge whether to select NGT severe limit pili torti motivation extinction function, when not selecting NGT severe limit pili torti motivation extinction function, export the torque parameter T4 that limit turns round 20%;
When selecting NGT severe limit pili torti motivation extinction function, export flame-out instruction X4.
As improving especially further technique scheme, described TNGT Logic judgment, described ECT Logic judgment and described NGT rate of change Logic judgment order are in no particular order.
Owing to have employed technique scheme, adopt three temperature transducers to gather the water outlet water temperature ECT of vaporizer outlets temperature TNGT, gas metering valve inlet temperature NGT and motor simultaneously, between three temperature transducers, there is corresponding logical operation, according to the protection had under the situation that three temperature transducers are different in various degree, through limitting the reliably protecting turned round, the budding stage being isolated in danger, simultaneously in order to prevent dangerous generation from arranging pressure extinction function especially, protecting very abundant; Even be that one of them temperature transducer is damaged the data that also can be gathered by other sensors and carries out reliably protecting.Judge that water temperature controls engine power and exports by three temperature transducers; ability full-load operation after the necessary fully warming-up of motor; the pre-protection all can limitedly turned round before report fault; after potential risk is eliminated; engine power recovers automatically; unnecessary parking can be avoided, protect the reliability of motor to the full extent.The present invention utilizes the facility of electronic control technology; reliable low-temperature protection is carried out to the gas supply system of LNG motor; effectively prevent personal safety and economic loss that LNG motor in use brings because of low temperature; safety measure is strengthened, and promotes traction and the competitive ability of this series products.
Accompanying drawing explanation
The following drawings is only intended to schematically illustrate the present invention and explain, not delimit the scope of the invention.Wherein:
Fig. 1 is the structural representation of the embodiment of the present invention;
Fig. 2 is the partial enlarged drawing at I place of Fig. 1;
Fig. 3 is the partial enlarged drawing at II place of Fig. 1;
Fig. 4 is the partial enlarged drawing at III place of Fig. 1;
Fig. 5 is the partial enlarged drawing at IV place of Fig. 1;
Fig. 6 is that the different TNGT lower limits of the embodiment of the present invention turn round export ratio plotted curve;
Fig. 7 is that the different ECT lower limits of the embodiment of the present invention turn round export ratio plotted curve;
Fig. 8 is that the different N GT lower limit of the embodiment of the present invention turns round export ratio plotted curve;
Fig. 9 is the Faulty Temperature setting value plotted curve of NGT under the different ECT of the embodiment of the present invention.
Embodiment
Below in conjunction with drawings and Examples, set forth the present invention further.In the following detailed description, the mode only by illustrating describes some one exemplary embodiment of the present invention.Undoubtedly, those of ordinary skill in the art can recognize, when without departing from the spirit and scope of the present invention, can revise by various different mode to described embodiment.Therefore, accompanying drawing is illustrative with being described in essence, instead of for limiting the protection domain of claim.
Refer to Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5.
The guard method of LNG motor ultralow temperature fuel gas temperature, comprises the following steps
The first step, in advance at the water outlet respectively mounting temperature sensor of vaporizer outlets, gas metering valve inlet and motor, the respectively corresponding water outlet water temperature ECT gathering vaporizer outlets temperature TNGT, gas metering valve inlet temperature NGT and motor; Preset TNGT controling parameters value, NGT controling parameters value, ECT controling parameters value respectively;
By judging TNGT after second step, Engine ECU power on, carry out engine start protection;
Wherein, by engine start during described engine start protection, and the 3rd step is proceeded; Not by engine misses during described engine start protection, terminating operation;
3rd step, read TNGT, NGT and ECT, and by TNGT, NGT and ECT by logical operation, judge to carry out motor limit and turn round operation, motor and normally run or engine misses;
4th step, when the 3rd step be motor limit turn round operation or motor normally run time, repeat the 3rd step; When the 3rd step is engine misses, terminating operation.
As shown in Figure 2, the protection of engine start described in described second step specifically comprises:
Read TNGT, TNGT controling parameters value and comprise the too low setting value of TNGT;
According to the too low setting value of TNGT, whether judge TNGT≤the too low setting value of TNGT, during the too low setting value of TNGT > TNGT: engine start;
During the too low setting value of TNGT≤TNGT: judge whether to trigger TNGT too low fault, when not triggering the too low fault of TNGT: engine start;
When triggering the too low fault of TNGT: report the too low fault of TNGT and continue to judge whether the too low engine misses function of selection TNGT, when not selecting the too low engine misses function of TNGT: engine start;
When selecting the too low engine misses function of TNGT: engine misses, terminating operation.The too low setting value of TNGT can as required voluntarily, such as-80 DEG C, arranges especially force engine misses function to prevent dangerous generation, but through verification experimental verification, through limitting the reliably protecting turned round, be difficult to trigger extinction function.
Logical operation described in described 3rd step comprises TNGT Logic judgment, ECT Logic judgment, ECT are greater than NGT Logic judgment and NGT rate of change Logic judgment under 40 DEG C of warm-up modes;
By described TNGT Logic judgment, export and obtain torque parameter T1, flame-out instruction X1 and normal instructions Z1;
By described ECT Logic judgment, export and obtain torque parameter T2;
Be greater than NGT Logic judgment under 40 DEG C of warm-up modes by described ECT, export and obtain torque parameter T3, flame-out instruction X3 and normal instructions Z3;
By described NGT rate of change Logic judgment, export and obtain torque parameter T4, flame-out instruction X4 and normal instructions Z4;
According to above-mentioned parameter, show that motor limit is turned round operation, motor and normally run or the operational order of engine misses; Wherein: motor limit is turned round Operational Limits=irreducible minimum and turned round parameter MIN (torque parameter T1, torque parameter T2, torque parameter T3, torque parameter T4), the normal operating instruction of motor=each normal instructions and computing (normal instructions Z1* normal instructions Z3* normal instructions Z4), the process of engine misses instruction=each flame-out instruction or computing (flame-out instruction X1+ stop working instruction X3+ stop working instruction X4).
Wherein, each normal instructions and computing (normal instructions Z1* normal instructions Z3* normal instructions Z4) refer to and to be greater than under 40 DEG C of warm-up modes after NGT Logic judgment and NGT rate of change Logic judgment through TNGT Logic judgment, ECT Logic judgment, ECT, the situation that normal instructions Z1, normal instructions Z3 and normal instructions Z4 all export, now controls motor and normally runs.
Each flame-out instruction or computing (flame-out instruction X1+ stop working instruction X3+ stop working instruction X4) refer to and to be greater than under 40 DEG C of warm-up modes after NGT Logic judgment and NGT rate of change Logic judgment through TNGT Logic judgment, ECT Logic judgment, ECT, as long as flame-out instruction X1, flame-out instruction X3 and flame-out instruction X4 have a situation about exporting, now control engine misses.Beyond above-mentioned two situations, select irreducible minimum to turn round parameter MIN (torque parameter T1, torque parameter T2, torque parameter T3, torque parameter T4), control motor limit and turn round operation.
As shown in Figure 3, described TNGT Logic judgment comprises:
Read TNGT, described TNGT controling parameters value comprises TNGT limit and turns round parameter value, the too low fault parameter value of TNGT;
Turn round parameter value according to TNGT limit, judge whether that triggering TNGT limits twisting die formula, when not triggering TNGT limit twisting die formula, directly export normal instructions Z1;
Trigger TNGT when limitting twisting die formula, according to the too low fault parameter value of TNGT, judge whether to trigger TNGT too low fault, when not triggering the too low fault of TNGT, turn round export ratio output torque parameter T1 according to TNGT and limit; As shown in Figure 6, under different TNGT, limit turns round export ratio difference, turns round export ratio form a curve according to the change limit of TNGT, as the form in Fig. 1 shown in II, is form obtained after selected part point value;
When triggering the too low fault of TNGT, report the too low fault of TNGT and continue to judge whether to select the too low engine misses function of TNGT, when not selecting the too low engine misses function of TNGT, exporting the torque parameter T1 limitting and turn round 20%;
When selecting the too low engine misses function of TNGT, export flame-out instruction X1.
TNGT is the temperature that vaporizer outlets is given vent to anger, ECU powers on after engine start, according to TNGT, carry out Logic judgment, there is provided corresponding data, to control motor, such as TNGT is lower than a certain setting value, the fault that ECU can report TNGT too low, and this fault can perform the action that motor limit is turned round or stopped working.
As shown in Figure 4, described ECT Logic judgment comprises:
Read ECT, described ECT controling parameters value comprises ECT limit and turns round parameter value;
Turn round parameter value according to ECT limit, judge whether that triggering ECT limits twisting die formula≤40 DEG C, do not trigger ECT when limitting twisting die formula≤40 DEG C, carry out described ECT and be greater than NGT Logic judgment under 40 DEG C of warm-up modes;
When triggering ECT limit twisting die formula≤40 DEG C, turn round export ratio output torque parameter T2 according to ECT and limit.As shown in Figure 7, under different ECT, limit turns round export ratio difference, turns round export ratio form a curve according to the change limit of ECT, as the corresponding form in Fig. 1 shown in III, is form obtained after selected part point value.
ECT is the water temperature of the water outlet of motor, the air conditioner state of motor is judged by ECT, if water temperature is lower, meaning also can be lower to the heating efficiency of LNG, at this time ECU can carry out the output of limiting engine moment of torsion according to different water temperatures, and gas flow maximum value can be limited because of Engine torque export-restriction.Under normal circumstances, along with the rising of engine water temperature, fuel gas temperature also can rise.
As shown in Figure 4, under described ECT is greater than 40 DEG C of warm-up modes, NGT Logic judgment comprises:
Read NGT, described NGT controling parameters value comprises NGT limit and turns round parameter value, the too low fault parameter value of NGT;
Turn round parameter value according to NGT limit, judge whether that triggering NGT limits twisting die formula≤0 DEG C, when not triggering NGT limit twisting die formula≤0 DEG C, directly export normal instructions Z3;
When triggering NGT limit twisting die formula≤0 DEG C, according to the too low fault parameter value of NGT, the too low fault parameter value of NGT can be-20 DEG C, judges to trigger too low fault≤-20 DEG C of NGT, when not triggering too low fault≤-20 DEG C of NGT, turn round export ratio output torque parameter T3 according to NGT and limit; As shown in Figure 8, under different NGT, limit turns round export ratio difference, turns round export ratio form a curve according to the change limit of NGT, as the corresponding form in Fig. 1 shown in III, is form obtained after selected part point value.
When triggering too low fault≤-20 DEG C of NGT, the too low fault of NGT is reported according to ECT and NGT, as shown in Figure 9, it is not identical that the Faulty Temperature of different ECT, corresponding NGT is arranged, that is, if NGT is lower than the setting value under corresponding ECT, ECU then can quote fault, and the setting value according to the Faulty Temperature of the corresponding NGT of the change of NGT forms a curve, as the corresponding form in Fig. 1 shown in III, corresponding form be form obtained after selected part point value.
Judge whether to select NGT too low engine misses function, when not selecting the too low engine misses function of NGT, export the torque parameter T3 that limit turns round 20%;
When selecting the too low engine misses function of NGT, export flame-out instruction X3.
When ECT is greater than 40 DEG C, think warm-up mode, this time, ECU can judge fuel gas temperature i.e. the NGT of gas metering valve inlet, because combustion gas uses with regard to supply engine after here, so the fuel gas temperature monitoring this place can embody the fuel gas supply situation of motor reality.First the limit can carried out in various degree according to different NGT turns round control, if NGT is lower than the setting value under corresponding water temperature ECT in addition, ECU then can quote fault, and this fault can perform motor limit and turn round or flame-out action.If turned round by limit, fuel gas temperature recovers normally, and the Power output of motor also can recover normal, and motor normally runs.
As shown in Figure 5, described NGT rate of change Logic judgment comprises:
Read NGT, described NGT controling parameters value comprise NGT rate of change limit turn round parameter value and NGT rate of change severe limit turn round fault parameter value;
Turn round parameter value according to NGT rate of change limit, judge whether to trigger NGT rate of change limit twisting die formula, when not triggering NGT rate of change limit twisting die formula, directly export normal instructions Z4;
When triggering NGT rate of change limit twisting die formula, fault parameter value is turned round according to NGT rate of change severe limit, judge whether that triggering NGT rate of change severe limit turns round fault, do not trigger NGT rate of change severe limit when turning round fault, turn round export ratio output torque parameter T4 according to limit;
When triggering NGT rate of change severe limit turns round fault, report NGT severe to limit and turn round fault and continue to judge whether to select NGT severe limit pili torti motivation extinction function, when not selecting NGT severe limit pili torti motivation extinction function, export the torque parameter T4 that limit turns round 20%;
When selecting NGT severe limit pili torti motivation extinction function, export flame-out instruction X4.
The present embodiment is moment monitoring NGT rate of change also, when lowering speed is too fast, ECU can report fault and and the time limit turn round.When arriving serious limited torque state, if fuel gas temperature is still extremely low, engine misses function can be performed, stop.
Described TNGT Logic judgment, described ECT Logic judgment and described NGT rate of change Logic judgment order are in no particular order.TNGT, ECT and NGT are gathered by three temperature transducers simultaneously, even be that one of them temperature transducer is damaged the data that also can be gathered by other sensors and carries out reliably protecting.
The present embodiment adopts three temperature transducers to gather the water outlet water temperature ECT of vaporizer outlets temperature TNGT, gas metering valve inlet temperature NGT and motor simultaneously, between three temperature transducers, there is corresponding logical operation, according to the protection had under the situation that three temperature transducers are different in various degree, through limitting the reliably protecting turned round, the budding stage is isolated in danger, simultaneously in order to prevent dangerous generation from arranging pressure extinction function especially, protect very abundant; Even be that one of them temperature transducer is damaged the data that also can be gathered by other sensors and carries out reliably protecting.Judge that water temperature controls engine power and exports by three temperature transducers; ability full-load operation after the necessary fully warming-up of motor; the pre-protection all can limitedly turned round before report fault; after potential risk is eliminated; engine power recovers automatically; unnecessary parking can be avoided, protect the reliability of motor to the full extent.The present invention utilizes the facility of electronic control technology; reliable low-temperature protection is carried out to the gas supply system of LNG motor; effectively prevent personal safety and economic loss that LNG motor in use brings because of low temperature; safety measure is strengthened, and promotes traction and the competitive ability of this series products.
More than show and describe basic principle of the present invention, major character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.

Claims (7)

  1. The guard method of 1.LNG motor ultralow temperature fuel gas temperature, is characterized in that, comprise the following steps
    The first step, in advance at the water outlet respectively mounting temperature sensor of vaporizer outlets, gas metering valve inlet and motor, the respectively corresponding water outlet water temperature ECT gathering vaporizer outlets temperature TNGT, gas metering valve inlet temperature NGT and motor; Preset TNGT controling parameters value, NGT controling parameters value, ECT controling parameters value respectively;
    By judging TNGT after second step, Engine ECU power on, carry out engine start protection; Wherein, by engine start during described engine start protection, and the 3rd step is proceeded; Not by engine misses during described engine start protection, terminating operation;
    3rd step, read TNGT, NGT and ECT, and by TNGT, NGT and ECT by logical operation, judge to carry out motor limit and turn round operation, motor and normally run or engine misses;
    4th step, when the 3rd step be motor limit turn round operation or motor normally run time, repeat the 3rd step; When the 3rd step is engine misses, terminating operation;
    Logical operation described in described 3rd step comprises TNGT Logic judgment, ECT Logic judgment, ECT are greater than NGT Logic judgment and NGT rate of change Logic judgment under 40 DEG C of warm-up modes;
    By described TNGT Logic judgment, export and obtain torque parameter T1, flame-out instruction X1 and normal instructions Z1;
    By described ECT Logic judgment, export and obtain torque parameter T2;
    Be greater than NGT Logic judgment under 40 DEG C of warm-up modes by described ECT, export and obtain torque parameter T3, flame-out instruction X3 and normal instructions Z3;
    By described NGT rate of change Logic judgment, export and obtain torque parameter T4, flame-out instruction X4 and normal instructions Z4;
    According to above-mentioned parameter, show that motor limit is turned round operation, motor and normally run or the operational order of engine misses; Wherein: motor limit is turned round Operational Limits=irreducible minimum and turned round parameter MIN (torque parameter T1, torque parameter T2, torque parameter T3, torque parameter T4), the normal operating instruction of motor=each normal instructions and computing (normal instructions Z1* normal instructions Z3* normal instructions Z4), the process of engine misses instruction=each flame-out instruction or computing (flame-out instruction X1+ stop working instruction X3+ stop working instruction X4).
  2. 2. LNG motor ultralow temperature fuel gas temperature guard method as claimed in claim 1, is characterized in that, the protection of engine start described in described second step comprises:
    Read TNGT, TNGT controling parameters value and comprise the too low setting value of TNGT;
    Whether judge TNGT≤the too low setting value of TNGT, during the too low setting value of TNGT > TNGT: engine start;
    During the too low setting value of TNGT≤TNGT: judge whether to trigger TNGT too low fault, when not triggering the too low fault of TNGT: engine start;
    When triggering the too low fault of TNGT: report the too low fault of TNGT and continue to judge whether the too low engine misses function of selection TNGT, when not selecting the too low engine misses function of TNGT: engine start;
    When selecting the too low engine misses function of TNGT: engine misses, terminating operation.
  3. 3. LNG motor ultralow temperature fuel gas temperature guard method as claimed in claim 1, it is characterized in that, described TNGT Logic judgment comprises:
    Read TNGT, described TNGT controling parameters value comprises TNGT limit and turns round parameter value, the too low fault parameter value of TNGT;
    Judge whether that triggering TNGT limits twisting die formula, when not triggering TNGT limit twisting die formula, directly export normal instructions Z1;
    Trigger TNGT when limitting twisting die formula, judge whether to trigger TNGT too low fault, when not triggering the too low fault of TNGT, turn round export ratio output torque parameter T1 according to TNGT and limit;
    When triggering the too low fault of TNGT, report the too low fault of TNGT and continue to judge whether to select the too low engine misses function of TNGT, when not selecting the too low engine misses function of TNGT, exporting the torque parameter T1 limitting and turn round 20%;
    When selecting the too low engine misses function of TNGT, export flame-out instruction X1.
  4. 4. LNG motor ultralow temperature fuel gas temperature guard method as claimed in claim 1, it is characterized in that, described ECT Logic judgment comprises:
    Read ECT, described ECT controling parameters value comprises ECT limit and turns round parameter value;
    Judge whether that triggering ECT limits twisting die formula≤40 DEG C, do not trigger ECT when limitting twisting die formula≤40 DEG C, carry out described ECT and be greater than NGT Logic judgment under 40 DEG C of warm-up modes;
    When triggering ECT limit twisting die formula≤40 DEG C, turn round export ratio output torque parameter T2 according to ECT and limit.
  5. 5. LNG motor ultralow temperature fuel gas temperature guard method as claimed in claim 4, it is characterized in that, under described ECT is greater than 40 DEG C of warm-up modes, NGT Logic judgment comprises:
    Read NGT, described NGT controling parameters value comprises NGT limit and turns round parameter value, the too low fault parameter value of NGT;
    Judge whether that triggering NGT limits twisting die formula≤0 DEG C, when not triggering NGT limit twisting die formula≤0 DEG C, directly export normal instructions Z3;
    Trigger NGT when limitting twisting die formula≤0 DEG C, judge to trigger too low fault≤-20 DEG C of NGT, when not triggering too low fault≤-20 DEG C of NGT, turn round export ratio output torque parameter T3 according to NGT and limit;
    When triggering too low fault≤-20 DEG C of NGT, report the too low fault of NGT according to ECT and NGT, judge whether to select the too low engine misses function of NGT, when not selecting the too low engine misses function of NGT, export the torque parameter T3 limitting and turn round 20%;
    When selecting the too low engine misses function of NGT, export flame-out instruction X3.
  6. 6. LNG motor ultralow temperature fuel gas temperature guard method as claimed in claim 1, it is characterized in that, described NGT rate of change Logic judgment comprises:
    Read NGT, described NGT controling parameters value comprise NGT rate of change limit turn round parameter value and NGT rate of change severe limit turn round fault parameter value;
    Judge whether to trigger NGT rate of change limit twisting die formula, when not triggering NGT rate of change limit twisting die formula, directly export normal instructions Z4;
    When triggering NGT rate of change limit twisting die formula, judge whether that triggering NGT rate of change severe limit turns round fault, do not trigger NGT rate of change severe limit when turning round fault, turn round export ratio output torque parameter T4 according to limit;
    When triggering NGT rate of change severe limit turns round fault, report NGT severe to limit and turn round fault and continue to judge whether to select NGT severe limit pili torti motivation extinction function, when not selecting NGT severe limit pili torti motivation extinction function, export the torque parameter T4 that limit turns round 20%;
    When selecting NGT severe limit pili torti motivation extinction function, export flame-out instruction X4.
  7. 7. the LNG motor ultralow temperature fuel gas temperature guard method as described in claim as arbitrary in claim 1 to 6, is characterized in that, described TNGT Logic judgment, described ECT Logic judgment and described NGT rate of change Logic judgment order are in no particular order.
CN201410074873.7A 2014-03-03 2014-03-03 The guard method of LNG motor ultralow temperature fuel gas temperature Active CN103835827B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410074873.7A CN103835827B (en) 2014-03-03 2014-03-03 The guard method of LNG motor ultralow temperature fuel gas temperature

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410074873.7A CN103835827B (en) 2014-03-03 2014-03-03 The guard method of LNG motor ultralow temperature fuel gas temperature

Publications (2)

Publication Number Publication Date
CN103835827A CN103835827A (en) 2014-06-04
CN103835827B true CN103835827B (en) 2016-02-24

Family

ID=50799662

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201410074873.7A Active CN103835827B (en) 2014-03-03 2014-03-03 The guard method of LNG motor ultralow temperature fuel gas temperature

Country Status (1)

Country Link
CN (1) CN103835827B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110242432A (en) * 2019-06-29 2019-09-17 潍柴动力股份有限公司 A kind of detection method of vaporizer, device, equipment and engine
CN111810302B (en) * 2020-07-01 2021-11-12 东风汽车集团有限公司 Method for determining maximum output torque of gasoline engine
CN115306617B (en) * 2022-07-31 2024-04-05 东风商用车有限公司 Method, device and equipment for quickly warming up engine and readable storage medium

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2580546B2 (en) * 1987-10-27 1997-02-12 スズキ株式会社 LNG engine frost prevention device
CN201187352Y (en) * 2008-05-08 2009-01-28 山西成功淮海发动机有限公司 Methanol fuel engine
CN100585170C (en) * 2008-12-12 2010-01-27 天津锐意泰克汽车电子有限公司 Low temperature cold start method for liquefied petrol gas single fuel automobile heating system
JP2011231674A (en) * 2010-04-27 2011-11-17 Toyota Motor Corp Apparatus for control of internal combustion engine
CN201786483U (en) * 2010-04-27 2011-04-06 潍柴动力股份有限公司 Fuel supply system and vehicle system comprising same
CN202031727U (en) * 2011-04-29 2011-11-09 河北中兴汽车制造有限公司 Electric control multipoint sequential gas injection and supply system

Also Published As

Publication number Publication date
CN103835827A (en) 2014-06-04

Similar Documents

Publication Publication Date Title
CN101333966B (en) Systems and methods for using a combustion dynamics tuning algorithm with a multi-can combustor
US20130236290A1 (en) System and method for turbomachine monitoring
CN103835827B (en) The guard method of LNG motor ultralow temperature fuel gas temperature
CN105822434B (en) A kind of apparatus and method for preventing the cold and hot suspension of Study On Start-up Process For Gas Turbines
CN110593990B (en) Fuel pipeline leakage detection method of HC injection system and related device
JP2005509794A5 (en)
US20110244407A1 (en) Combustion controlling device
WO2022121267A1 (en) Gas turbine fault monitoring system and method
EP2935818A1 (en) Apparatus and method of disabling a waste heat recovery apparatus working fluid flow
GB2532388A (en) Fuel circuit of an aircraft engine with a fuel recirculating valve controlled by a pressure differential of a low-pressure pump of the fuel system
CN104713729A (en) Method and system for diagnosing failure of a gasoline direct injection engine
KR101500896B1 (en) Exhaust heat recovery boiler, and power generation plant
JP6310707B2 (en) Operation method of fuel heating system
CN105587407B (en) A kind of method for preventing engine scuffing
CN107304717A (en) A kind of gas turbine surge monitoring device and method
US20240200491A1 (en) Water pressure and quantity monitoring for hydrogen steam injected and inter-cooled turbine engine
CN106439894B (en) Combustion engine and starting energy-saving control method thereof
CN209524628U (en) Water heater and its winterization system
KR20050120944A (en) Lpg leakage diagnosing method in a lpi engine
CN104245375A (en) Method for preventing and recognising coolant discharges from complex hydraulic systems
CN105604663A (en) Fault detection method and detection device for SCR system cooling liquid electromagnetic valve
CN106285983B (en) The diagnostic method of engine gas temperature sensor fault
CN106609708B (en) Prechamber fuel admission valve diagnostic
US20180252609A1 (en) Method for Detecting an Unsealed Location in a Heat Recovery System of an Internal Combustion Engine
akther Momin et al. Automatic signal and alarming system to avoid engine overheating

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant