CN113931760A - Power-on pulse width correction verification method and system for gas engine nozzle - Google Patents
Power-on pulse width correction verification method and system for gas engine nozzle Download PDFInfo
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- CN113931760A CN113931760A CN202111130959.3A CN202111130959A CN113931760A CN 113931760 A CN113931760 A CN 113931760A CN 202111130959 A CN202111130959 A CN 202111130959A CN 113931760 A CN113931760 A CN 113931760A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/0027—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures the fuel being gaseous
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
- F02D41/2425—Particular ways of programming the data
- F02D41/2487—Methods for rewriting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D2041/224—Diagnosis of the fuel system
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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
Abstract
The invention discloses a power-on pulse width correction calibration method and a power-on pulse width correction calibration system for a gas engine nozzle, which relate to the field of automobile power, and the method comprises the steps of detecting a delivery nozzle based on an injection detection mode to obtain the injection deviation characteristic of the nozzle; obtaining an energization compensation amount for correcting an energization time of the injection based on an injection deviation characteristic of the nozzle; recording the power-on compensation quantity to obtain a nozzle power-on pulse width correction code, and encrypting the nozzle power-on pulse width correction code based on a preset algorithm; when the nozzle is assembled on the engine, and the power-on pulse width correction code of the nozzle is decrypted successfully and the using times are verified successfully, writing the decrypted power-on pulse width correction code of the nozzle into the ECU; and correcting the jet power-on time of the nozzle based on the power-on compensation amount corresponding to the nozzle power-on pulse width correction code. The invention can improve the efficiency of the engine and protect the legal benefit of the manufacturer.
Description
Technical Field
The invention relates to the field of automobile power, in particular to a method and a system for correcting and checking the power-on pulse width of a nozzle of a gas engine.
Background
With the development of gas engine technology and the stricter and stricter emission regulations of vehicle engines, the air-fuel ratio control of the gas engine is required to be more accurate, and especially, the gas engine of the multipoint injection technology can meet the national 7 emission regulations in the future, and the gas amount injected into each cylinder in each cycle needs to be accurately regulated and controlled.
At present, gas engine nozzle usually adopts peak-hold current control mode, nevertheless because the deviation is made in production, there is the difference between the gas injection precision, when the same pulse width that adds acts on the different nozzles of same model, the actual action of opening of nozzle can be a little different, leads to there being the error between the gas volume of actual spun and the gas volume of expectation spun to lead to engine emission to rise, engine emission to worsen, increase engine aftertreatment system burden, reduce aftertreatment system life-span.
On the other hand, due to the difference of the engine fuel supply system, compared with the diesel engine nozzle, the manufacturing threshold of the gas engine nozzle is lower, so that the gas engine nozzle is easier to copy, a plurality of copies with poorer gas injection control are caused, if the genuine nozzle is replaced by a copy with low cost, the emission of the engine is deteriorated, even a safety accident is caused, and the protection of the legal benefit of a manufacturer is not facilitated.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a method and a system for correcting and checking the power-on pulse width of a nozzle of a gas engine, which can improve the efficiency of the engine and protect the legal benefits of a manufacturer.
In order to achieve the above object, the present invention provides a method for correcting and verifying the power-on pulse width of a nozzle of a gas engine, which comprises the following steps:
detecting a delivery nozzle based on a spray detection mode to obtain the spray deviation characteristic of the nozzle;
obtaining an energization compensation amount for correcting an energization time of the injection based on an injection deviation characteristic of the nozzle;
recording the power-on compensation quantity to obtain a nozzle power-on pulse width correction code, and encrypting the nozzle power-on pulse width correction code based on a preset algorithm;
when the nozzle is assembled on the engine, and the power-on pulse width correction code of the nozzle is decrypted successfully and the using times are verified successfully, writing the decrypted power-on pulse width correction code of the nozzle into the ECU;
and correcting the jet power-on time of the nozzle based on the power-on compensation amount corresponding to the nozzle power-on pulse width correction code.
On the basis of the technical scheme, after the nozzle power-on pulse width correction code of the nozzle is decrypted successfully and the using times are verified successfully, the decrypted nozzle power-on pulse width correction code is written into the ECU, and the specific steps comprise:
acquiring a nozzle power-on pulse width correction code after the nozzle is decrypted, and verifying the acquired nozzle power-on pulse width correction code, wherein the verification comprises decryption verification and use time verification;
and when the nozzle power-on pulse width correction code is successfully decrypted and the nozzle power-on pulse width correction code is obtained by networking comparison and verification based on the cloud database and is never written into the ECU, the verification is successful, the decrypted nozzle power-on pulse width correction code is written into the ECU, and otherwise, the operation is finished.
On the basis of the technical scheme, the method further comprises the following steps: when the nozzle needs to be replaced and the fault is monitored, acquiring a nozzle power-on pulse width correction code of a nozzle assembled on an engine, recording the nozzle power-on pulse width correction code as an updating comparison and storing the nozzle power-on pulse width correction code to an ECU (electronic control Unit), and after the nozzle needs to be replaced and the fault is eliminated, carrying out the following operations:
acquiring the power-on pulse width correction code of the nozzle assembled on the engine again, judging whether the acquired power-on pulse width correction code of the nozzle is consistent with the power-on pulse width correction code of the nozzle compared with the update ratio stored in the ECU:
if the difference is not consistent, the nozzle replacement processing is indicated, the nozzle power-on pulse width correction code is written normally, and the processing is not performed;
and if the detected signals are consistent with each other, alarming that the nozzle power-on pulse width correction code is abnormal.
On the basis of the technical proposal, the device comprises a shell,
when the vehicle is in the warranty period, the following steps are carried out: when the nozzle needs to be replaced, acquiring a nozzle power-on pulse width correction code assembled on the nozzle of the engine, recording the nozzle power-on pulse width correction code as an updating comparison and storing the nozzle power-on pulse width correction code to the ECU, and after the nozzle needs to be replaced and is eliminated after monitoring, acquiring the nozzle power-on pulse width correction code assembled on the nozzle of the engine again, and judging whether the acquired nozzle power-on pulse width correction code is consistent with the nozzle power-on pulse width correction code stored in the ECU or not;
when the vehicle is not in the warranty period, the following steps can be selected not to be carried out: when the nozzle needs to be replaced, acquiring a nozzle power-on pulse width correction code of a nozzle assembled on the engine, recording the nozzle power-on pulse width correction code as an updating comparison and storing the nozzle power-on pulse width correction code to the ECU, and after the nozzle needs to be replaced and is eliminated after monitoring, acquiring the nozzle power-on pulse width correction code of the nozzle assembled on the engine again, and judging whether the acquired nozzle power-on pulse width correction code is consistent with the nozzle power-on pulse width correction code stored in the ECU or not.
On the basis of the technical proposal, the device comprises a shell,
the nozzle to be injected is assembled on the engine, and specifically comprises a first assembling condition and a second assembling condition;
the first assembling condition is that the nozzle is assembled on the engine when the vehicle leaves a factory;
and the second assembling condition is that when the nozzle is replaced due to the failure of the nozzle, a new nozzle is assembled on the engine.
The invention provides a power-on pulse width correction verification system of a gas engine nozzle, which comprises:
the detection module is used for detecting the nozzle when the nozzle leaves a factory to obtain the spraying deviation characteristic of the nozzle, and obtaining the power-on compensation quantity for correcting the spraying power-on time based on the spraying deviation characteristic of the nozzle to form a power-on pulse width correction code of the nozzle;
the encryption module is used for encrypting the nozzle power-on pulse width correction codes of the nozzles based on a preset algorithm;
and the flash module is used for writing the decrypted nozzle power-on pulse width correction code into the ECU after the nozzle is assembled in the engine, the nozzle power-on pulse width correction code of the nozzle is decrypted successfully and the using times are verified successfully, so that the injection power-on time of the nozzle is corrected based on the power-on compensation amount corresponding to the nozzle power-on pulse width correction code.
On the basis of the technical proposal, the device comprises a shell,
the flash module also comprises an encryption validity verification module and a uniqueness verification module;
the encryption validity verification module is used for decrypting the nozzle power-on pulse width correction code of the nozzle;
the uniqueness verification module is used for networking to verify the use times of the nozzle power-on pulse width correction codes of the nozzles;
when the encryption validity verification module successfully decrypts the current nozzle energizing pulse width correction code and the uniqueness verification module obtains that the current nozzle energizing pulse width correction code is never written into the ECU based on cloud database networking comparison verification, the nozzle energizing pulse width correction code after current decryption is written into the ECU.
On the basis of the technical proposal, the device comprises a shell,
the device also comprises a nozzle replacement monitoring module;
the nozzle replacement monitoring module is used for acquiring a nozzle power-on pulse width correction code of a nozzle assembled on an engine when a nozzle replacement fault is monitored, recording the nozzle power-on pulse width correction code as an update comparison and storing the nozzle power-on pulse width correction code to an ECU (electronic control unit), acquiring the nozzle power-on pulse width correction code of the nozzle assembled on the engine again after the nozzle replacement fault is eliminated after the nozzle replacement fault is monitored, and judging whether the acquired nozzle power-on pulse width correction code is consistent with the nozzle power-on pulse width correction code stored in the ECU or not: if not, the processing is not carried out, and if the processing is consistent, the alarm of the abnormity of the nozzle power-on pulse width correction code is carried out.
On the basis of the technical proposal, the device comprises a shell,
monitoring an operation signal of the engine in real time, and when the air-fuel ratio correction value of the engine exceeds a maximum threshold value or is lower than a minimum threshold value through monitoring, judging that a nozzle of the engine breaks down, and monitoring to obtain that the nozzle needs to be replaced;
when the fault of the nozzle is detected to be repaired, the fault that the nozzle needs to be replaced is eliminated.
On the basis of the technical proposal, the device comprises a shell,
the system also comprises a background guarantee period recording module;
the background warranty period recording module is used for judging whether the vehicle is in a warranty period or not, driving the nozzle replacement monitoring module to work when the vehicle is in the warranty period, and selectively stopping the nozzle replacement monitoring module when the vehicle is not in the warranty period.
Compared with the prior art, the invention has the advantages that: the method comprises the steps of detecting when a nozzle leaves a factory to obtain the injection deviation characteristic of the nozzle, obtaining the power-on compensation amount for correcting the injection power-on time based on the injection deviation characteristic of the nozzle, recording the power-on compensation amount to obtain the power-on pulse width correction code of the nozzle, encrypting the power-on pulse width correction code of the nozzle based on a preset algorithm, writing the decrypted power-on pulse width correction code of the nozzle into an ECU (electronic control Unit) after the nozzle is assembled in the engine and the power-on pulse width correction code of the nozzle is decrypted successfully and the using times are verified successfully, thereby correcting the injection power-on time of the nozzle based on the power-on compensation amount corresponding to the power-on pulse width correction code of the nozzle, effectively improving the gas injection precision, improving the air-fuel ratio regulation response speed, improving the engine efficiency, reducing the original engine discharge of the engine, reducing the load of a post-processing system, prolonging the service life of the post-processing system and bringing higher economy to a vehicle, meanwhile, after the decryption is successful and the use times are verified successfully, the nozzle power-on pulse width correction code is written into the ECU, so that the replacement of the imitation nozzle is avoided, and the legal benefit of a manufacturer is protected.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a flow chart of a method for verifying a power-on pulse width correction of a gas engine nozzle according to an embodiment of the present invention.
Detailed Description
The embodiment of the invention provides a power-on pulse width correction and verification method of a nozzle of a gas engine, which comprises the steps of detecting when the nozzle leaves factory to obtain the injection deviation characteristic of the nozzle, obtaining the power-on compensation amount for correcting the injection power-on time based on the injection deviation characteristic of the nozzle, recording the power-on compensation amount to obtain the power-on pulse width correction code of the nozzle, encrypting the power-on pulse width correction code of the nozzle based on a preset algorithm, writing the decrypted power-on pulse width correction code of the nozzle into an ECU after the power-on pulse width correction code of the nozzle is decrypted successfully and the using times are verified successfully when the nozzle is assembled in the engine, thereby correcting the injection power-on time of the nozzle based on the power-on compensation amount corresponding to the power-on pulse width correction code of the nozzle, effectively improving the gas injection precision, improving the air-fuel ratio regulation response speed, improving the engine efficiency, reducing the original engine discharge and reducing the load of an engine post-processing system, the service life of the post-processing system is prolonged, higher economical efficiency is brought to the vehicle, meanwhile, after decryption succeeds and the using times are verified successfully, the nozzle power-on pulse width correction code is written into the ECU, replacement of the imitation nozzle is avoided, and legal benefits of a manufacturer are protected. The embodiment of the invention correspondingly provides a power-on pulse width correction verification system of the gas engine nozzle.
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1, a method for verifying a power-on pulse width correction of a gas engine nozzle according to an embodiment of the present invention specifically includes the following steps:
s1: and detecting the delivered nozzles based on the spray detection mode to obtain the spray deviation characteristics of the nozzles.
When the nozzles of the engine are delivered from a factory, a nozzle manufacturer detects each nozzle to obtain the injection deviation characteristic of each nozzle.
S2: based on the ejection deviation characteristic of the nozzle, an energization compensation amount for correcting the energization time of the ejection is obtained. In the working process, when the spray deviation exists in the nozzle, the spray of the nozzle can be corrected by correcting the spray power-on time, and the accurate spray of the nozzle is realized, so that the power-on compensation quantity for correcting the spray power-on time can be obtained based on the spray deviation characteristic of the nozzle.
In the embodiment of the invention, each nozzle corresponds to an electrification compensation amount.
S3: recording the power-on compensation quantity to obtain a nozzle power-on pulse width correction code, and encrypting the nozzle power-on pulse width correction code based on a preset algorithm; the nozzle power-on pulse width correction code is a code for recording power-on compensation amount data, and may exist in a two-dimensional code or other forms.
In the embodiment of the invention, the nozzle power-on pulse width correction code is encrypted by a preset encryption algorithm, so that the encrypted nozzle power-on pulse width correction code is obtained.
S4: when the nozzle is assembled in the engine, and the nozzle energizing pulse width correction code of the nozzle is decrypted successfully and the using times are verified successfully, the decrypted nozzle energizing pulse width correction code is written into an ECU (Electronic Control Unit);
in the embodiment of the invention, the algorithm used for decrypting the encrypted nozzle energizing pulse width correction code corresponds to the algorithm used for encrypting the nozzle energizing pulse width correction code, namely, the encrypted nozzle energizing pulse width correction code is decrypted by using the decryption algorithm corresponding to the preset algorithm. Because the algorithm used for decryption corresponds to the algorithm used for encryption, if decryption is successful, the authenticity of the nozzle power-on pulse width correction code can be verified, and the identity of the nozzle can be verified.
S5: and correcting the jet power-on time of the nozzle based on the power-on compensation amount corresponding to the nozzle power-on pulse width correction code. Namely, the ECU carries out differentiated correction on the injection power-up time of the nozzle through a corresponding algorithm according to the power-up compensation quantity, so that the aim of reducing the deviation between the actual injection gas quantity and the expected injection gas quantity is fulfilled, and accurate injection is realized.
The engine nozzle supplier carries out factory detection on each nozzle to obtain the injection deviation characteristic of each nozzle, and records the relevant parameters of the injection deviation characteristic by using a two-dimensional code or other forms of identifiers, wherein the identifiers are the power-on pulse width correction codes of the nozzles. The nozzle energizing pulse width correction code comprises the injection deviation characteristic of the corresponding nozzle, the injection deviation characteristic is decoded in the ECU, the energizing compensation quantity of each nozzle under the current working condition is calculated through a specific algorithm according to the obtained injection deviation characteristic parameter, and the energizing compensation quantity is used for correcting the energizing time signal, so that the purpose of reducing the deviation between the actual injection gas quantity and the expected injection gas quantity is achieved.
In the embodiment of the invention, after the nozzle power-on pulse width correction code of the nozzle is successfully decrypted and the using times are successfully verified, the decrypted nozzle power-on pulse width correction code is written into an ECU, and the specific steps comprise:
s401: acquiring a nozzle power-on pulse width correction code after the nozzle is decrypted, and verifying the acquired nozzle power-on pulse width correction code, wherein the verification comprises decryption verification and use time verification;
s402: and when the nozzle power-on pulse width correction code is successfully decrypted and the nozzle power-on pulse width correction code is obtained by networking comparison and verification based on the cloud database and is never written into the ECU, the verification is successful, the decrypted nozzle power-on pulse width correction code is written into the ECU, and otherwise, the operation is finished.
The nozzle power-on pulse width correction code is subjected to decryption verification and use time verification, and the effect of the verification is to verify that the replaced nozzle is genuine and is not used.
And when the nozzle power-on pulse width correction code is read in by the flash tool, the encrypted nozzle power-on pulse width correction code is decrypted. If the decryption is successful, the verification is passed, then the verification of the number of use times is carried out, if the networking verification obtains that the nozzle power-on pulse width correction code is never written into the ECU, namely the nozzle power-on pulse width correction code is never used, the current nozzle is indicated to be a genuine product, and the nozzle power-on pulse width correction code is written into the ECU.
The invention discloses a method for correcting and checking the power-on pulse width of a nozzle of a gas engine, which further comprises the following steps: when the nozzle needs to be replaced and the fault is monitored, acquiring a nozzle power-on pulse width correction code of a nozzle assembled on an engine, recording the nozzle power-on pulse width correction code as an updating comparison and storing the nozzle power-on pulse width correction code to an ECU (electronic control Unit), and after the nozzle needs to be replaced and the fault is eliminated, carrying out the following operations:
acquiring the power-on pulse width correction code of the nozzle assembled on the engine again, judging whether the acquired power-on pulse width correction code of the nozzle is consistent with the power-on pulse width correction code of the nozzle compared with the update ratio stored in the ECU:
if the difference is not consistent, the nozzle replacement processing is indicated, the nozzle power-on pulse width correction code is written normally, and the processing is not performed;
and if the detected signals are consistent with each other, alarming that the nozzle power-on pulse width correction code is abnormal.
That is, as shown in fig. 1, further steps may also include:
s6: when the nozzle needs to be replaced and the fault is monitored, acquiring a nozzle power-on pulse width correction code of a nozzle assembled on the engine, recording the nozzle power-on pulse width correction code as an updating comparison ratio and storing the nozzle power-on pulse width correction code to an ECU (electronic control unit), and acquiring the nozzle power-on pulse width correction code of the nozzle assembled on the engine again after the nozzle needs to be replaced and the fault is eliminated after the monitoring is obtained;
s7: and judging whether the nozzle power-on pulse width correction code obtained again is consistent with the nozzle power-on pulse width correction code stored in the ECU, if not, indicating that the nozzle is replaced, if so, writing the nozzle power-on pulse width correction code into the nozzle is normal, not processing the nozzle power-on pulse width correction code, and if so, alarming that the nozzle power-on pulse width correction code is abnormal.
In the embodiment of the present invention, the first and second substrates,
when the vehicle is in the warranty period, the following steps are carried out: when the nozzle needs to be replaced, acquiring a nozzle power-on pulse width correction code assembled on the nozzle of the engine, recording the nozzle power-on pulse width correction code as an updating comparison and storing the nozzle power-on pulse width correction code to the ECU, and after the nozzle needs to be replaced and is eliminated after monitoring, acquiring the nozzle power-on pulse width correction code assembled on the nozzle of the engine again, and judging whether the acquired nozzle power-on pulse width correction code is consistent with the nozzle power-on pulse width correction code stored in the ECU or not;
when the vehicle is not in the warranty period, the following steps can be selected not to be carried out: when the nozzle needs to be replaced, acquiring a nozzle power-on pulse width correction code of a nozzle assembled on the engine, recording the nozzle power-on pulse width correction code as an updating comparison and storing the nozzle power-on pulse width correction code to the ECU, and after the nozzle needs to be replaced and is eliminated after monitoring, acquiring the nozzle power-on pulse width correction code of the nozzle assembled on the engine again, and judging whether the acquired nozzle power-on pulse width correction code is consistent with the nozzle power-on pulse width correction code stored in the ECU or not.
In the embodiment of the invention, the nozzle to be assembled on the engine specifically comprises a first assembling condition and a second assembling condition; the first assembly condition is that the nozzle is assembled on the engine when the vehicle leaves a factory; the second assembly condition is when the nozzle is replaced due to a failure of the nozzle, a new nozzle is assembled to the engine. The method comprises the steps of monitoring an operation signal of the engine in real time, judging that a nozzle of the engine breaks down when the air-fuel ratio correction value of the engine obtained through monitoring exceeds a maximum threshold value or is lower than a minimum threshold value, monitoring a vehicle at the moment, monitoring to obtain that the nozzle needs to be replaced, and eliminating the nozzle needs to be replaced after the nozzle can be replaced by a nozzle which can work normally. The failure of the nozzle is a stuck-at failure or a normally open failure, although failure of the nozzle also includes other types of failures.
The power-on pulse width correction and verification method of the gas engine nozzle of the embodiment of the invention comprises the steps of detecting the nozzle when the nozzle leaves factory to obtain the injection deviation characteristic of the nozzle, obtaining the power-on compensation amount for correcting the injection power-on time based on the injection deviation characteristic of the nozzle, recording the power-on compensation amount to obtain the power-on pulse width correction code of the nozzle, encrypting the power-on pulse width correction code of the nozzle based on the preset algorithm, writing the decrypted power-on pulse width correction code of the nozzle into an ECU after the power-on pulse width correction code of the nozzle is decrypted successfully and the using times are verified successfully when the nozzle is assembled in the engine, thereby correcting the injection power-on time of the nozzle based on the power-on compensation amount corresponding to the power-on pulse width correction code of the nozzle, effectively improving the gas injection precision, improving the air-fuel ratio regulation response speed, improving the engine efficiency, reducing the original engine emission and reducing the load of an engine post-processing system, the service life of the post-processing system is prolonged, higher economical efficiency is brought to the vehicle, meanwhile, after decryption succeeds and the using times are verified successfully, the nozzle power-on pulse width correction code is written into the ECU, replacement of the imitation nozzle is avoided, and legal benefits of a manufacturer are protected.
An embodiment of the present invention further provides a readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the power-on pulse width correction verification method described above.
The storage medium may take any combination of one or more computer-readable media. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. The computer-readable storage medium may be, for example but not limited to: an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
A computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wire, fiber optic cable, RF, etc., or any suitable combination of the foregoing.
Computer program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider).
The embodiment of the invention also provides a power-on pulse width correction and verification system of the gas engine nozzle, which comprises a detection module, an encryption module and a flash module.
The detection module is used for detecting the nozzle when the nozzle leaves a factory to obtain the spraying deviation characteristic of the nozzle, and obtaining the power-on compensation quantity for correcting the spraying power-on time based on the spraying deviation characteristic of the nozzle to form a nozzle power-on pulse width correction code; the encryption module is used for encrypting the nozzle power-on pulse width correction code of the nozzle based on a preset algorithm; the brush writing module is used for writing the decrypted nozzle power-on pulse width correction code into the ECU after the nozzle is assembled in the engine, the nozzle power-on pulse width correction code of the nozzle is decrypted successfully and the using times are verified successfully, so that the injection power-on time of the nozzle is corrected based on the power-on compensation amount corresponding to the nozzle power-on pulse width correction code.
The flash module in the embodiment of the invention also comprises an encryption validity verification module and a uniqueness verification module, and is used for judging whether the nozzle which is replaced currently is a genuine product. The encryption validity verification module is used for decrypting the nozzle power-on pulse width correction code of the nozzle; the uniqueness verification module is used for networking to verify the use times of the nozzle power-on pulse width correction codes of the nozzles; when the encryption validity verification module successfully decrypts the current nozzle energizing pulse width correction code and the uniqueness verification module obtains that the current nozzle energizing pulse width correction code is never written into the ECU based on cloud database networking comparison verification, the nozzle energizing pulse width correction code after current decryption is written into the ECU.
After the nozzle power-on pulse width correction code is read in by the flash module, the encryption validity verification module firstly judges the encryption validity, if the nozzle power-on pulse width correction code accords with the encryption algorithm and can be decrypted successfully, the nozzle power-on pulse width correction code passes the validity verification, then the uniqueness verification module detects whether the nozzle power-on pulse width correction code is never used or not in a networking mode, if the nozzle power-on pulse width correction code passes the uniqueness verification, the corresponding nozzle is considered to be a genuine product, the nozzle power-on pulse width correction code is written into the ECU, and if not, the writing operation is not executed.
The power-on pulse width correction verification system of the embodiment of the invention also comprises a nozzle replacement monitoring module and a background guarantee period recording module.
The nozzle replacement monitoring module is used for acquiring a nozzle power-on pulse width correction code of a nozzle assembled on an engine when the nozzle replacement fault is monitored, recording the nozzle power-on pulse width correction code as an update comparison and storing the nozzle power-on pulse width correction code to an ECU, acquiring the nozzle power-on pulse width correction code of the nozzle assembled on the engine again after the nozzle replacement fault is eliminated after the nozzle replacement fault is monitored, and judging whether the acquired nozzle power-on pulse width correction code is consistent with the nozzle power-on pulse width correction code stored in the ECU: if not, the processing is not carried out, and if the processing is consistent, the alarm of the abnormity of the nozzle power-on pulse width correction code is carried out.
The method comprises the steps of monitoring an operation signal of the engine in real time, judging that a nozzle of the engine breaks down when the air-fuel ratio correction value of the engine exceeds a maximum threshold value or is lower than a minimum threshold value obtained through monitoring, and monitoring to obtain that the nozzle needs to be replaced. The failure of the nozzle includes nozzle sticking, nozzle normally open, etc.
When the fault of the nozzle is detected to be repaired, the fault that the nozzle needs to be replaced is eliminated. Specifically, whether the failure of the nozzle has been repaired is detected by the ECU.
The background warranty period recording module is used for judging whether the vehicle is in a warranty period or not, driving the nozzle replacement monitoring module to work when the vehicle is in the warranty period, and selectively stopping the nozzle replacement monitoring module when the vehicle is not in the warranty period.
In the running process of a vehicle in a warranty period, when a nozzle fault module in an ECU reports a fault that a nozzle needs to be replaced, a nozzle replacement monitoring module is started, the nozzle replacement monitoring module is used for recording a nozzle power-on pulse width correction code of the nozzle and monitoring whether the nozzle fault is eliminated in real time, if the fault elimination is detected, the nozzle power-on pulse width correction code of the nozzle currently assembled on an engine is judged to be consistent with the previously recorded nozzle power-on pulse width correction code: if the nozzle energizing pulse width correction code of the nozzle which is currently assembled on the engine is inconsistent with the nozzle energizing pulse width correction code which is recorded before, the nozzle replacement processing is indicated, the nozzle energizing pulse width correction code is written normally, and the processing is not performed; and if the nozzle energizing pulse width correction code of the nozzle currently assembled on the engine is consistent with the nozzle energizing pulse width correction code recorded before, alarming that the nozzle energizing pulse width correction code is abnormal.
In the invention, an engine nozzle supplier carries out factory detection on each nozzle to obtain the injection deviation characteristic of each nozzle, and records the injection deviation characteristic parameters, namely the power-on pulse width correction code of the nozzle, by using a two-dimensional code or other forms of identifiers; the nozzle power-on pulse width correction code comprises the spray deviation characteristic of the corresponding nozzle, the nozzle power-on compensation calculation module decodes the spray deviation characteristic in the ECU, and the power-on compensation amount of each nozzle under the current working condition is calculated through a specific algorithm according to the obtained spray deviation characteristic parameter and is used for correcting the power-on time signal; a specific encryption algorithm is adopted for the nozzle power-on pulse width correction code, and the nozzle power-on pulse width correction code can pass the verification after decryption and is a valid code; the nozzle power-on pulse width correction code has uniqueness, and the background of the host factory records the used nozzle power-on pulse width correction code to prevent copying; the nozzle power-on pulse width correction code flash tool in the aftermarket verifies the effectiveness and the uniqueness of the nozzle power-on pulse width correction code and judges whether the nozzle which is replaced currently is a genuine product; when the engine has a fault which can be repaired only by replacing the nozzle, and then if the fault is eliminated but the power-on pulse width correction code of the nozzle is not changed, the fault that the power-on pulse width correction code of the nozzle is abnormal is reported; the nozzle verification measure sets a time limit, i.e., is enabled during vehicle warranty, and the nozzle verification function is selected to be turned off after vehicle warranty.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Claims (10)
1. A power-on pulse width correction verification method for a gas engine nozzle is characterized by comprising the following steps:
detecting a delivery nozzle based on a spray detection mode to obtain the spray deviation characteristic of the nozzle;
obtaining an energization compensation amount for correcting an energization time of the injection based on an injection deviation characteristic of the nozzle;
recording the power-on compensation quantity to obtain a nozzle power-on pulse width correction code, and encrypting the nozzle power-on pulse width correction code based on a preset algorithm;
when the nozzle is assembled on the engine, and the power-on pulse width correction code of the nozzle is decrypted successfully and the using times are verified successfully, writing the decrypted power-on pulse width correction code of the nozzle into the ECU;
and correcting the jet power-on time of the nozzle based on the power-on compensation amount corresponding to the nozzle power-on pulse width correction code.
2. The power-on pulse width correction verification method for a gas engine nozzle as claimed in claim 1, wherein said decrypting the power-on pulse width correction code for the nozzle and verifying the number of times of use successfully write the decrypted power-on pulse width correction code for the nozzle into the ECU, and the specific steps include:
acquiring a nozzle power-on pulse width correction code after the nozzle is decrypted, and verifying the acquired nozzle power-on pulse width correction code, wherein the verification comprises decryption verification and use time verification;
and when the nozzle power-on pulse width correction code is successfully decrypted and the nozzle power-on pulse width correction code is obtained by networking comparison and verification based on the cloud database and is never written into the ECU, the verification is successful, the decrypted nozzle power-on pulse width correction code is written into the ECU, and otherwise, the operation is finished.
3. The method of claim 1, further comprising: when the nozzle needs to be replaced and the fault is monitored, acquiring a nozzle power-on pulse width correction code of a nozzle assembled on an engine, recording the nozzle power-on pulse width correction code as an updating comparison and storing the nozzle power-on pulse width correction code to an ECU (electronic control Unit), and after the nozzle needs to be replaced and the fault is eliminated, carrying out the following operations:
acquiring the power-on pulse width correction code of the nozzle assembled on the engine again, judging whether the acquired power-on pulse width correction code of the nozzle is consistent with the power-on pulse width correction code of the nozzle compared with the update ratio stored in the ECU:
if the difference is not consistent, the nozzle replacement processing is indicated, the nozzle power-on pulse width correction code is written normally, and the processing is not performed;
and if the detected signals are consistent with each other, alarming that the nozzle power-on pulse width correction code is abnormal.
4. A method of verifying the power-on pulse width correction of a gas engine nozzle as set forth in claim 3, wherein:
when the vehicle is in the warranty period, the following steps are carried out: when the nozzle needs to be replaced, acquiring a nozzle power-on pulse width correction code assembled on the nozzle of the engine, recording the nozzle power-on pulse width correction code as an updating comparison and storing the nozzle power-on pulse width correction code to the ECU, and after the nozzle needs to be replaced and is eliminated after monitoring, acquiring the nozzle power-on pulse width correction code assembled on the nozzle of the engine again, and judging whether the acquired nozzle power-on pulse width correction code is consistent with the nozzle power-on pulse width correction code stored in the ECU or not;
when the vehicle is not in the warranty period, the following steps can be selected not to be carried out: when the nozzle needs to be replaced, acquiring a nozzle power-on pulse width correction code of a nozzle assembled on the engine, recording the nozzle power-on pulse width correction code as an updating comparison and storing the nozzle power-on pulse width correction code to the ECU, and after the nozzle needs to be replaced and is eliminated after monitoring, acquiring the nozzle power-on pulse width correction code of the nozzle assembled on the engine again, and judging whether the acquired nozzle power-on pulse width correction code is consistent with the nozzle power-on pulse width correction code stored in the ECU or not.
5. A method of verifying the power-on pulse width correction of a gas engine nozzle as set forth in claim 1, wherein:
the nozzle to be injected is assembled on the engine, and specifically comprises a first assembling condition and a second assembling condition;
the first assembling condition is that the nozzle is assembled on the engine when the vehicle leaves a factory;
and the second assembling condition is that when the nozzle is replaced due to the failure of the nozzle, a new nozzle is assembled on the engine.
6. A system for calibrating a power-on pulse width correction of a gas engine nozzle, comprising:
the detection module is used for detecting the nozzle when the nozzle leaves a factory to obtain the spraying deviation characteristic of the nozzle, and obtaining the power-on compensation quantity for correcting the spraying power-on time based on the spraying deviation characteristic of the nozzle to form a power-on pulse width correction code of the nozzle;
the encryption module is used for encrypting the nozzle power-on pulse width correction codes of the nozzles based on a preset algorithm;
and the flash module is used for writing the decrypted nozzle power-on pulse width correction code into the ECU after the nozzle is assembled in the engine, the nozzle power-on pulse width correction code of the nozzle is decrypted successfully and the using times are verified successfully, so that the injection power-on time of the nozzle is corrected based on the power-on compensation amount corresponding to the nozzle power-on pulse width correction code.
7. A system for verification of power-on pulse width correction of a gas engine nozzle as set forth in claim 6 wherein:
the flash module also comprises an encryption validity verification module and a uniqueness verification module;
the encryption validity verification module is used for decrypting the nozzle power-on pulse width correction code of the nozzle;
the uniqueness verification module is used for networking to verify the use times of the nozzle power-on pulse width correction codes of the nozzles;
when the encryption validity verification module successfully decrypts the current nozzle energizing pulse width correction code and the uniqueness verification module obtains that the current nozzle energizing pulse width correction code is never written into the ECU based on cloud database networking comparison verification, the nozzle energizing pulse width correction code after current decryption is written into the ECU.
8. A system for verification of power-on pulse width correction of a gas engine nozzle as set forth in claim 6 wherein:
the device also comprises a nozzle replacement monitoring module;
the nozzle replacement monitoring module is used for acquiring a nozzle power-on pulse width correction code of a nozzle assembled on an engine when a nozzle replacement fault is monitored, recording the nozzle power-on pulse width correction code as an update comparison and storing the nozzle power-on pulse width correction code to an ECU (electronic control unit), acquiring the nozzle power-on pulse width correction code of the nozzle assembled on the engine again after the nozzle replacement fault is eliminated after the nozzle replacement fault is monitored, and judging whether the acquired nozzle power-on pulse width correction code is consistent with the nozzle power-on pulse width correction code stored in the ECU or not: if not, the processing is not carried out, and if the processing is consistent, the alarm of the abnormity of the nozzle power-on pulse width correction code is carried out.
9. A method of verifying the power-on pulse width correction of a gas engine nozzle as set forth in claim 8, wherein:
monitoring an operation signal of the engine in real time, and when the air-fuel ratio correction value of the engine exceeds a maximum threshold value or is lower than a minimum threshold value through monitoring, judging that a nozzle of the engine breaks down, and monitoring to obtain that the nozzle needs to be replaced;
when the fault of the nozzle is detected to be repaired, the fault that the nozzle needs to be replaced is eliminated.
10. A system for verification of power-on pulse width correction of a gas engine nozzle as set forth in claim 8 wherein:
the system also comprises a background guarantee period recording module;
the background warranty period recording module is used for judging whether the vehicle is in a warranty period or not, driving the nozzle replacement monitoring module to work when the vehicle is in the warranty period, and selectively stopping the nozzle replacement monitoring module when the vehicle is not in the warranty period.
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