CN111636955A - Heavy diesel vehicle and engine aftertreatment anti-cheating method and system thereof - Google Patents
Heavy diesel vehicle and engine aftertreatment anti-cheating method and system thereof Download PDFInfo
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- CN111636955A CN111636955A CN202010512550.7A CN202010512550A CN111636955A CN 111636955 A CN111636955 A CN 111636955A CN 202010512550 A CN202010512550 A CN 202010512550A CN 111636955 A CN111636955 A CN 111636955A
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- 238000000034 method Methods 0.000 title claims abstract description 40
- 238000001514 detection method Methods 0.000 claims abstract description 39
- 230000008569 process Effects 0.000 claims description 11
- 238000012937 correction Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 12
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 238000012805 post-processing Methods 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 5
- 239000004202 carbamide Substances 0.000 description 5
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 230000002265 prevention Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
- F01N11/002—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring or estimating temperature or pressure in, or downstream of the exhaust apparatus
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Abstract
The application discloses heavy diesel vehicle and engine aftertreatment anti-cheating method and system thereof, and the engine aftertreatment anti-cheating method of the heavy diesel vehicle comprises the following steps: acquiring the rotating speed and the torque of an engine, and determining an exhaust temperature reference range; acquiring an exhaust temperature detection value; judging whether the exhaust temperature detection value is in an exhaust temperature reference range or not; if not, an external torque request command is sent to the ECU to limit the output torque of the engine. The application provides a heavy diesel vehicle's engine aftertreatment anti-cheating method can react when aftertreatment system has the condition of cheating, restricts engine torque output, forces the driver to resume exhaust temperature sensor's normal operating condition, realizes the effect of environmental protection.
Description
Technical Field
The application relates to the technical field of aftertreatment, in particular to a heavy diesel vehicle and an engine aftertreatment cheating prevention method and system thereof.
Background
At the present stage, national emission regulations of heavy-duty diesel engines have certain requirements on the discharge amount of nitrogen oxides in tail gas. In this regard, various engine companies have added aftertreatment systems in their designs that require the addition of urea solutions to react with the nitrogen oxides in the exhaust. The urea solution is a consumable product, and not only does not increase any income for users of the whole vehicle, but also increases the operation cost.
The inventor finds that a part of users improve the position of the exhaust temperature sensor above a catalytic converter of an aftertreatment system by changing the mounting bolt of the exhaust temperature sensor, so that the aftertreatment temperature acquired by the exhaust temperature sensor is greatly deviated from the actual exhaust temperature (the actual exhaust temperature may be 300 ℃, and the acquired temperature may be only 200 ℃), the aftertreatment system cannot normally perform urea injection, and the purposes of saving urea and even not injecting urea are achieved. But the cheating mode causes certain pollution to the environment.
Therefore, how to provide a solution to the above technical problem is a problem that needs to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, an object of the present application is to provide a heavy-duty diesel vehicle and an engine aftertreatment cheating prevention method and system thereof, which can respond to a cheating condition of an exhaust gas temperature sensor, limit engine torque output or give an alarm, force a driver to recover a normal working state of the exhaust gas temperature sensor, and achieve an effect of protecting the environment.
In order to achieve the above purpose, the present application provides the following technical solutions:
an engine aftertreatment anti-cheating method for a heavy-duty diesel vehicle, comprising:
acquiring the rotating speed and the torque of an engine, and determining an exhaust temperature reference range according to the rotating speed and the torque;
acquiring an exhaust temperature detection value;
judging whether the exhaust temperature detection value is in the exhaust temperature reference range or not;
if not, an external torque request command is sent to the ECU to limit the output torque of the engine.
Optionally, when the exhaust temperature detection value is not within the exhaust temperature reference range, the method further includes:
and sending an alarm instruction to the ECU so as to enable the alarm device to give an alarm.
Optionally, the process of determining the exhaust temperature reference range by the rotation speed and the torque includes:
determining a theoretical exhaust temperature through the rotating speed and the torque;
broadening the theoretical exhaust temperature to obtain the reference range of the exhaust temperature; wherein the theoretical exhaust temperature is greater than the minimum value of the exhaust temperature reference range and less than the maximum value of the exhaust temperature reference range.
Optionally, before widening the theoretical exhaust temperature to obtain the exhaust temperature reference range, the method further includes:
and correcting the theoretical exhaust temperature according to the pressure and/or the temperature of the environment, and assigning the corrected value to the theoretical exhaust temperature.
An engine aftertreatment anti-cheating system for a heavy-duty diesel vehicle, comprising:
the exhaust temperature reference range determining module is used for acquiring the rotating speed and the torque of the engine and determining an exhaust temperature reference range according to the rotating speed and the torque;
the exhaust temperature detection value acquisition module is used for acquiring an exhaust temperature detection value;
the judging module is used for judging whether the exhaust temperature detection value is in the exhaust temperature reference range or not;
and the first execution module is used for sending an external torque request instruction to the ECU to limit the output torque of the engine when the judgment result of the judgment module is negative.
Optionally, the method further includes:
and the second execution module is used for sending an alarm instruction to the ECU when the exhaust temperature detection value is not in the exhaust temperature reference range so as to enable an alarm device to give an alarm.
Optionally, the exhaust temperature reference range determination module includes:
the theoretical exhaust temperature determining module is used for determining theoretical exhaust temperature through the rotating speed and the torque;
the broadening module is used for broadening the theoretical exhaust temperature to obtain the reference range of the exhaust temperature; wherein the theoretical exhaust temperature is greater than the minimum value of the exhaust temperature reference range and less than the maximum value of the exhaust temperature reference range.
Optionally, the exhaust temperature reference range determining module further includes:
and the correction module is used for correcting the theoretical exhaust temperature according to the pressure and/or temperature of the environment before the theoretical exhaust temperature is widened to obtain the exhaust temperature reference range, and assigning the corrected value to the theoretical exhaust temperature.
A heavy-duty diesel vehicle comprises an engine, an ECU, an exhaust gas temperature sensor and an EXT anti-cheating device for executing any one engine aftertreatment anti-cheating method of the heavy-duty diesel vehicle; the EXT anti-cheating device is electrically connected with the exhaust temperature sensor, and an exhaust temperature detection value is determined through the exhaust temperature sensor; the EXT anti-cheating device is electrically connected with the ECU, the EXT anti-cheating device obtains the rotating speed and the torque of the engine through the ECU and determines an exhaust temperature reference range, and the EXT anti-cheating device is used for sending an external torque request instruction to the ECU under the condition that the exhaust temperature detection value is out of the exhaust temperature reference range so as to limit the output torque of the engine.
Through above-mentioned scheme, the beneficial effect of the engine aftertreatment anti-cheating method of the heavy diesel vehicle that this application provided lies in:
the application provides a heavy diesel vehicle's engine aftertreatment anti-cheating method includes the following step: acquiring the rotating speed and the torque of an engine, and determining an exhaust temperature reference range; acquiring an exhaust temperature detection value; judging whether the exhaust temperature detection value is in an exhaust temperature reference range or not; if not, an external torque request command is sent to the ECU to limit the output torque of the engine.
In the working process, when the engine is in a certain working state, the exhaust temperature reference range can be determined by reading the torque of the corresponding engine speed, the exhaust temperature detection value detected by the exhaust temperature sensor in the current state is compared with the exhaust temperature reference range, if the exhaust temperature detection value is in the exhaust temperature reference range, the exhaust temperature sensor in the post-processing system of the engine is not changed, and the EXT anti-cheating device does not act. If the exhaust temperature detection value is not within the exhaust temperature reference range, the engine is considered to carry out relevant modification on the exhaust temperature sensor, the engine has a post-processing cheating condition, the EXT cheating preventer requests the engine to limit the torque output of the engine through a CAN bus, meanwhile, corresponding fault information is reported, a driver is required to process the cheating condition, the exhaust temperature sensor is recovered to a normal state, and the effect of protecting the environment is achieved.
Further, it should be appreciated that the engine aftertreatment anti-cheating system for a heavy-duty diesel vehicle and the heavy-duty diesel vehicle provided by the present application also have the beneficial effects described above.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a flow chart of an engine aftertreatment anti-cheating method for a heavy-duty diesel vehicle according to an embodiment of the present application;
FIG. 2 is a schematic structural diagram of an engine aftertreatment anti-cheating system of a heavy-duty diesel vehicle according to an embodiment of the present application;
fig. 3 is a control schematic diagram of a heavy-duty diesel vehicle according to an embodiment of the present disclosure.
Detailed Description
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 only a part of the embodiments of the present application, and not all of the 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, the present application provides a method for preventing cheating by engine post-treatment of a heavy-duty diesel vehicle, comprising the steps of:
step S1, obtaining the rotating speed and the torque of the engine 1, and determining an exhaust temperature reference range according to the rotating speed and the torque;
specifically, the rotation speed of the engine 1 and the torque of the engine 1 can be directly read by an ECU (Electronic control unit) 2. Different engine 1 speeds and different engine 1 torques correspond to a predetermined exhaust gas temperature reference range, i.e. the exhaust gas temperature reference range can be uniquely determined by both the speed and torque parameters. The correspondence between the rotational speed, the torque, and the exhaust temperature reference range is referred to as a reference model, which is stored in the EXT cheater 3 in advance and is called directly when in use.
And step S2, acquiring an exhaust temperature detection value. The exhaust temperature detection value is detected by an exhaust temperature sensor 4.
Step S3, judging whether the exhaust temperature detection value is in the exhaust temperature reference range; if yes, the post-processing system is not cheated, and no prompt or external control is needed; if not, indicating that the post-processing system is cheated, then the flow goes to step S4;
step S4, an external torque request command is sent to the ECU2 to limit the output torque of the engine 1.
Specifically, the EXT cheater 3 transmits an external torque request command to the ECU2 via the CAN bus to limit the output torque of the engine 1, and requests the engine 1 to perform a torque limiting operation, thereby forcing the driver to deal with the cheating condition and restoring the normal state of the aftertreatment system. Optionally, if the post-processing system has a cheating condition, an alarm instruction may be sent to the ECU2, so that the alarm device sends out an alarm to report the fault.
In another embodiment provided by the present application, the process of determining the exhaust temperature reference range by the rotation speed and the torque in step S1 includes:
and step S11, determining the theoretical exhaust temperature through the rotating speed and the torque.
Specifically, in an ideal state, the engine 1 has a fixed theoretical exhaust temperature corresponding to different rotation speeds and different torques, and the corresponding relationship between the rotation speed and the torque of the engine 1 and the theoretical exhaust temperature is referred to as an exhaust temperature basic model. The basic model of the exhaust temperature can be determined through an experimental mode, and the experimental process is as follows: theoretical exhaust temperatures corresponding to respective torques at each rotation speed are measured one by one on the bench, and the measured theoretical exhaust temperatures are modeled in the EXT cheater 3. In addition, the whole working condition of the engine 1 is preferably tested in the experimental process, so that the problem that most conditions cannot be monitored due to narrow working condition range is avoided; or in the detection working condition, although cheating is carried out, the problem that effective identification cannot be carried out and the identification precision is low is solved.
Step S12, expanding the theoretical exhaust temperature to obtain an exhaust temperature reference range; the theoretical exhaust temperature is larger than the minimum value of the exhaust temperature reference range, and the theoretical exhaust temperature is smaller than the maximum value of the exhaust temperature reference range.
Specifically, because a certain error may be caused by the establishment of the basic exhaust temperature model, the calibration process, or other reasons, the determined theoretical exhaust temperature needs to be widened, where the widening refers to taking a value smaller than the theoretical exhaust temperature by a first floating value as a minimum value, taking a value larger than the theoretical exhaust temperature by a second floating value as a maximum value, and taking an interval formed by the minimum value and the maximum value as an exhaust temperature reference range. The first floating value and the second floating value are positive numbers, and may be equal or different.
In another embodiment provided by the present application, in order to improve the accuracy of the anti-cheating method for the engine post-processing of the heavy-duty diesel vehicle, between the step S11 and the step S12, the method further comprises:
step S13 corrects the theoretical exhaust temperature according to the pressure and/or temperature of the environment, and assigns the corrected value to the theoretical exhaust temperature.
Specifically, considering that the country has wide regions, the altitude can be more than 0m to 4800m, the ambient temperature can be generally between 40 ℃ below zero and 40 ℃, and even the temperature range is larger, so that the theoretical exhaust temperature can be correspondingly corrected according to different altitudes and different ambient temperatures. In actual work, the theoretical exhaust temperature can be corrected according to one of the two parameters of the temperature and the pressure of the environment, in order to further optimize the accuracy, the theoretical exhaust temperature is preferably corrected according to the two parameters of the temperature and the pressure of the environment, and the sequence of correction is not limited.
The application provides a heavy diesel vehicle's engine aftertreatment anti-cheating method's working process as follows:
when the engine 1 is in a certain working state, the EXT anti-cheating device 3 reads the rotating speed and the torque of the engine 1 and finds the current theoretical exhaust temperature in the exhaust temperature basic model; then correcting the theoretical exhaust temperature according to the current altitude and the current environment temperature to obtain an engine model exhaust temperature; and finally, widening the corrected numerical value to obtain an exhaust temperature reference range in the current state. The EXT anti-cheating device 3 reads the resistance value of the exhaust temperature sensor 4 and converts the resistance value into a currently measured exhaust temperature detection value inside the equipment; the exhaust temperature detection value measured by the exhaust temperature sensor 4 in the present state is compared with the exhaust temperature reference range. If the exhaust temperature detection value is within the exhaust temperature reference range, it is considered that the exhaust temperature sensor 4 in the aftertreatment system of the engine 1 has not been modified, and the EXT cheater 3 does not act. If the exhaust temperature detection value is not in the exhaust temperature reference range, the engine 1 is considered to perform relevant modification on the exhaust temperature sensor 4, the engine 1 has an aftertreatment cheating condition, the EXT cheating prevention device 3 CAN request the engine 1 to limit the torque output of the engine 1 through the CAN bus, and meanwhile, corresponding fault information is reported to require a driver to process the cheating condition and restore the normal state of an aftertreatment system of the engine 1.
According to the embodiment, the method for preventing cheating after engine treatment of the heavy-duty diesel vehicle has the advantages that:
the torque and the rotating speed of the engine 1 are read through the EXT anti-cheating device 3 to establish a temperature exhaust basic model in a corresponding state, the exhaust temperature detection value is judged whether to be in a correct exhaust temperature reference range or not through certain correction on different altitudes and different temperatures, and the control on the engine 1 is realized through communication between a CAN bus and the ECU 2. This heavy diesel vehicle's engine aftertreatment anti-cheating method passes through the model of high accuracy, carries out the exhaust temperature contrast under the operating mode to engine 1, and whether accurate discernment aftertreatment system has the condition of practising cheating, prevents artificial change exhaust temperature sensor 4's purpose, avoids appearing discharging the condition that is not conform to the regulation, realizes the effect of environmental protection.
Referring to fig. 2, the present application provides an engine aftertreatment anti-cheating system for a heavy-duty diesel vehicle, comprising:
an exhaust temperature reference range determination module 100, configured to obtain a rotation speed and a torque of the engine 1, and determine an exhaust temperature reference range according to the rotation speed and the torque;
an exhaust temperature detection value acquisition module 200, configured to acquire an exhaust temperature detection value;
the judging module 300 is used for judging whether the exhaust temperature detection value is in an exhaust temperature reference range;
a first executing module 400, configured to, when the determination result of the determining module 300 is negative,
an external torque request command is sent to the ECU2 to limit the output torque of the engine 1.
Optionally, in an embodiment, the engine aftertreatment anti-cheating system of a heavy-duty diesel vehicle further comprises:
and the second execution module is used for sending a warning instruction to the ECU2 when the exhaust temperature detection value is not in the exhaust temperature reference range so as to enable the warning device to give an alarm.
Optionally, in an embodiment, the exhaust temperature reference range determination module 100 includes:
the theoretical exhaust temperature determining module is used for determining the theoretical exhaust temperature through the rotating speed and the torque;
the expanding module is used for expanding the theoretical exhaust temperature to obtain an exhaust temperature reference range; the theoretical exhaust temperature is larger than the minimum value of the exhaust temperature reference range, and the theoretical exhaust temperature is smaller than the maximum value of the exhaust temperature reference range.
Optionally, in an embodiment, the exhaust temperature reference range determination module 100 further includes:
and the correction module is used for correcting the theoretical exhaust temperature according to the pressure and/or the temperature of the environment before the theoretical exhaust temperature is widened to obtain the exhaust temperature reference range, and assigning the corrected value to the theoretical exhaust temperature.
Referring to fig. 3, the present application provides a heavy duty diesel vehicle including: the engine 1, the ECU2, the exhaust gas temperature sensor 4, and the EXT cheater-preventing device 3. Wherein the EXT anti-cheating device 3 is used for executing the engine aftertreatment anti-cheating method of any one heavy-duty diesel vehicle; the EXT anti-cheating device 3 is directly and electrically connected with the exhaust temperature sensor 4, and the EXT anti-cheating device 3 directly reads the information of the exhaust temperature sensor 4 and analyzes and processes the information to determine the exhaust temperature detection value; or the EXT cheater 3 is indirectly connected with the exhaust gas temperature sensor 4, for example, the EXT cheater 3 and the exhaust gas temperature sensor 4 are respectively connected with the ECU2, the ECU2 directly reads information of the exhaust gas temperature sensor 4, and the EXT cheater 3 indirectly obtains a detected exhaust gas temperature value of the exhaust gas temperature sensor 4 through the ECU 2. In addition, the EXT anti-cheating device 3 communicates with the ECU2 through a CAN bus to realize the control of the engine 1; specifically, the EXT cheater 3 acquires the rotation speed and torque of the engine 1 through the ECU2 and determines an exhaust temperature reference range, and the EXT cheater 3 is configured to transmit an external torque request command to the ECU2 to limit the output torque of the engine 1 in a case where the detected exhaust temperature value is outside the exhaust temperature reference range.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The heavy-duty diesel vehicle and the engine aftertreatment anti-cheating method and system thereof provided by the application are described in detail above. The principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the method and the core idea of the present application. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.
Claims (9)
1. An engine aftertreatment anti-cheating method for a heavy-duty diesel vehicle, comprising:
acquiring the rotating speed and the torque of an engine, and determining an exhaust temperature reference range according to the rotating speed and the torque;
acquiring an exhaust temperature detection value;
judging whether the exhaust temperature detection value is in the exhaust temperature reference range or not;
if not, an external torque request command is sent to the ECU to limit the output torque of the engine.
2. The engine aftertreatment cheat-prevention method of a heavy-duty diesel vehicle of claim 1, wherein when the exhaust temperature detection value is not within the exhaust temperature reference range, further comprising:
and sending an alarm instruction to the ECU so as to enable an alarm device to give an alarm.
3. The heavy-duty diesel vehicle engine post-treatment anti-cheating method according to any one of claims 1 or 2, wherein said process of determining an exhaust gas temperature reference range from said rotation speed and said torque comprises:
determining a theoretical exhaust temperature through the rotating speed and the torque;
broadening the theoretical exhaust temperature to obtain the reference range of the exhaust temperature; wherein the theoretical exhaust temperature is greater than the minimum value of the exhaust temperature reference range and less than the maximum value of the exhaust temperature reference range.
4. The heavy-duty diesel vehicle engine aftertreatment anti-cheating method according to claim 3, further comprising, prior to said broadening said theoretical exhaust temperature into said exhaust temperature reference range:
and correcting the theoretical exhaust temperature according to the pressure and/or the temperature of the environment, and assigning the corrected value to the theoretical exhaust temperature.
5. An engine aftertreatment anti-cheating system for a heavy-duty diesel vehicle, comprising:
the exhaust temperature reference range determining module is used for acquiring the rotating speed and the torque of the engine and determining an exhaust temperature reference range according to the rotating speed and the torque;
the exhaust temperature detection value acquisition module is used for acquiring an exhaust temperature detection value;
the judging module is used for judging whether the exhaust temperature detection value is in the exhaust temperature reference range or not;
and the first execution module is used for sending an external torque request instruction to the ECU to limit the output torque of the engine when the judgment result of the judgment module is negative.
6. The heavy duty diesel vehicle engine aftertreatment anti-cheating system according to claim 5, further comprising:
and the second execution module is used for sending an alarm instruction to the ECU when the exhaust temperature detection value is not in the exhaust temperature reference range so as to enable an alarm device to give an alarm.
7. The heavy-duty diesel vehicle engine aftertreatment anti-cheating system according to any one of claims 5 or 6, wherein said exhaust temperature reference range determination module comprises:
the theoretical exhaust temperature determining module is used for determining theoretical exhaust temperature through the rotating speed and the torque;
the broadening module is used for broadening the theoretical exhaust temperature to obtain the reference range of the exhaust temperature; wherein the theoretical exhaust temperature is greater than the minimum value of the exhaust temperature reference range and less than the maximum value of the exhaust temperature reference range.
8. The heavy-duty diesel vehicle engine aftertreatment anti-cheating system according to claim 7, wherein said exhaust temperature reference range determination module further comprises:
and the correction module is used for correcting the theoretical exhaust temperature according to the pressure and/or temperature of the environment before the theoretical exhaust temperature is widened to obtain the exhaust temperature reference range, and assigning the corrected value to the theoretical exhaust temperature.
9. A heavy-duty diesel vehicle, characterized by comprising an engine, an ECU, an exhaust gas temperature sensor, and an EXT anti-cheater for performing the engine aftertreatment anti-cheating method of the heavy-duty diesel vehicle recited in any one of claims 1 to 4; the EXT anti-cheating device is electrically connected with the exhaust temperature sensor and determines an exhaust temperature detection value through the exhaust temperature sensor; the EXT anti-cheating device is electrically connected with the ECU, the EXT anti-cheating device obtains the rotating speed and the torque of the engine through the ECU and determines an exhaust temperature reference range, and the EXT anti-cheating device is used for sending an external torque request instruction to the ECU under the condition that the exhaust temperature detection value is out of the exhaust temperature reference range so as to limit the output torque of the engine.
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Effective date of registration: 20231113 Address after: 243071 No. 359 Huxinan Road, Economic and Technological Development Zone, Ma'anshan City, Anhui Province Patentee after: Anhui Hanma Engine Co.,Ltd. Address before: 243061 No. 359, Huxi South Road, Ma'anshan economic and Technological Development Zone, Ma'anshan City, Anhui Province Patentee before: ANHUI HUALING AUTOMOBILE Co.,Ltd. |