CN114088406B - Calibration method, device and equipment for engine cold start and computer storage medium - Google Patents
Calibration method, device and equipment for engine cold start and computer storage medium Download PDFInfo
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- CN114088406B CN114088406B CN202111456051.1A CN202111456051A CN114088406B CN 114088406 B CN114088406 B CN 114088406B CN 202111456051 A CN202111456051 A CN 202111456051A CN 114088406 B CN114088406 B CN 114088406B
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- 238000000034 method Methods 0.000 title claims abstract description 50
- 238000012360 testing method Methods 0.000 claims description 16
- 230000005540 biological transmission Effects 0.000 claims description 12
- 230000007613 environmental effect Effects 0.000 claims description 9
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- 238000004891 communication Methods 0.000 description 6
- 239000000446 fuel Substances 0.000 description 5
- 238000005457 optimization Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000010705 motor oil Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
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- 230000003287 optical effect Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
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Abstract
The invention discloses a calibration method, a device, equipment and a computer storage medium for cold starting of an engine, wherein the method comprises the following steps: acquiring a first starting resistance when the engine is mounted in the vehicle and acquiring a second starting resistance when the engine is not mounted in the vehicle; acquiring a resistance difference value between the first starting resistance and the second starting resistance; when the engine is not installed in the vehicle, loading the engine by the resistance corresponding to the resistance difference value; the engine is started to determine calibration data for the engine. According to the invention, the resistance errors of the engine when the engine is mounted in the vehicle and not mounted in the vehicle are detected, and the engine is loaded according to the resistance errors during calibration, so that the starting resistance of the engine during calibration is consistent with the starting resistance of the engine during actual use, and the accuracy of calibration data is improved.
Description
Technical Field
The present invention relates to the field of cold start technologies, and in particular, to a method, an apparatus, a device, and a computer storage medium for calibrating cold start of an engine.
Background
In winter with lower temperature, especially at-10 to 30 ℃, methanol fuel cannot form good fuel mixture gas, and engine efficiency is greatly reduced. And under the influence of low temperature, methanol fuel is easy to be adsorbed on the wall of the air passage, the viscosity of oil in the gearbox is also increased, the rotation resistance is also increased, the engine is difficult to start, and finally the probability of vehicle start failure is increased. It is therefore desirable to calibrate for a cold start of a vehicle to reduce instances of cold start failure of the vehicle.
At present, the environment in the alpine region is generally simulated through an environment bin, and the engine is calibrated in the environment bin. However, the starting resistance of the engine alone is often inconsistent with the starting resistance of the engine in the whole vehicle, so that the calibration data is not matched with the actual use, and the accuracy of the calibration data is low.
Disclosure of Invention
The invention mainly aims to provide a method, a device, equipment and a computer storage medium for calibrating cold start of an engine, which aim to improve the accuracy of calibration data of the cold start of the engine.
To achieve the above object, the present invention provides a calibration method for cold start of an engine, the method comprising:
acquiring a first starting resistance when the engine is mounted in the vehicle and acquiring a second starting resistance when the engine is not mounted in the vehicle;
acquiring a resistance difference value between the first starting resistance and the second starting resistance;
when the engine is not installed in the vehicle, loading the engine by the resistance corresponding to the resistance difference value;
the engine is started to determine calibration data for the engine.
Optionally, the step of obtaining the first starting resistance when the engine is installed in the vehicle includes:
placing a vehicle provided with an engine in an environment bin with a preset test temperature;
the engine is reversed towed so that the rotating speed of the engine reaches the preset starting rotating speed;
detecting a first torque value adopted by the reverse-towing engine when the rotating speed of the engine reaches a preset starting rotating speed;
a first starting resistance is determined according to the first torque value.
Optionally, the step of determining the first starting resistance according to the first torque value comprises:
acquiring the transmission ratio of a gearbox and a transmission shaft of a vehicle;
a first starting resistance is determined according to the gear ratio and the first torque value.
Optionally, the step of obtaining the second starting resistance when the engine is not mounted in the vehicle includes:
placing an engine which is not installed in a vehicle in an environment bin with a preset test temperature;
the engine is reversed towed so that the rotating speed of the engine reaches the preset starting rotating speed;
detecting a second torque value adopted by the reverse-towing engine when the rotating speed of the engine reaches a preset starting rotating speed;
a second starting resistance is determined from the second torque value.
Optionally, the step of loading the engine with the resistance corresponding to the resistance difference comprises:
connecting the engine with the dynamometer to take the dynamometer as the load of the engine;
and adjusting the loading torque of the dynamometer to the resistance corresponding to the resistance difference value.
Optionally, the step of starting the engine to determine calibration data of the engine comprises:
starting the engine according to preset ECU data to detect whether the engine is started normally;
and when the engine is started normally, determining the calibration data of the engine according to the preset ECU data.
Optionally, after the step of starting the engine according to the preset ECU data to detect whether the engine is started normally, the method further includes:
when the engine is not started normally, adjusting preset ECU data;
and returning to the step of executing the engine starting according to the preset ECU data to detect whether the engine is started normally or not by adopting the adjusted preset ECU data.
In addition, in order to achieve the above object, the present invention also provides a calibration device for cold start of an engine, the calibration device for cold start of an engine comprising: the method comprises the steps of a memory, a processor and a calibration program of the engine cold start, wherein the calibration program of the engine cold start is stored in the memory and can run on the processor, and the calibration program of the engine cold start is executed by the processor to realize the calibration method of the engine cold start.
In addition, in order to achieve the above object, the present invention also provides an engine cold start calibration apparatus, which includes an environmental chamber for placing a vehicle mounted with an engine and/or for placing an engine not mounted in the vehicle, a dynamometer for loading the engine with a resistance corresponding to a difference in resistance, and a controller for executing the steps of the engine cold start calibration method as described in any one of the above.
In addition, in order to achieve the above object, the present invention also provides a computer storage medium having stored thereon a calibration program for cold starting an engine, which when executed by a processor, implements the steps of the calibration method for cold starting an engine as described above.
The method, the device, the equipment and the computer storage medium for calibrating the cold start of the engine acquire the first starting resistance when the engine is installed in the vehicle and acquire the second starting resistance when the engine is not installed in the vehicle; acquiring a resistance difference value between the first starting resistance and the second starting resistance; when the engine is not installed in the vehicle, loading the engine by the resistance corresponding to the resistance difference value; the engine is started to determine calibration data for the engine. According to the invention, the resistance errors of the engine when the engine is mounted in the vehicle and not mounted in the vehicle are detected, and the engine is loaded according to the resistance errors during calibration, so that the starting resistance of the engine during calibration is consistent with the starting resistance of the engine during actual use, and the accuracy of calibration data is improved.
Drawings
FIG. 1 is a flow chart of an embodiment of a calibration method for engine cold start according to the present invention;
FIG. 2 is a flow chart of another embodiment of a calibration method for engine cold start according to the present invention;
FIG. 3 is a flow chart of a calibration method for cold starting of an engine according to another embodiment of the present invention;
FIG. 4 is a flow chart of a calibration method for cold starting of an engine according to yet another embodiment of the present invention;
fig. 5 is a schematic diagram of a terminal structure of a hardware running environment according to an embodiment of the present invention.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The embodiment of the invention provides a solution, by detecting the resistance error of the engine when the engine is mounted in the vehicle or not mounted in the vehicle and loading the engine according to the resistance error during calibration, the starting resistance of the engine during calibration is consistent with the starting resistance of the engine during actual use, and the accuracy of calibration data is improved.
Referring to FIG. 1, in one embodiment, a method for calibrating a cold start of an engine includes the steps of:
step S10, acquiring a first starting resistance when the engine is installed in the vehicle and acquiring a second starting resistance when the engine is not installed in the vehicle;
in the present embodiment, since the engine-alone starting load does not coincide with the starting load of the engine in the whole vehicle, it is possible to obtain the first starting resistance when the engine is mounted in the vehicle and to obtain the second starting resistance when the engine is not mounted in the vehicle. The first starting resistance is the starting load of the engine in the whole vehicle. The second starting resistance is an engine-only starting load.
Alternatively, the engine may be reversed to a preset starting speed by means of a dynamometer, a drum, or the like, and the first starting resistance and/or the second starting resistance may be determined based on the torque of the reversed engine. For example, when the first starting resistance is acquired, the engine mounted in the vehicle may be reversed by the drum reverse-dragging, the rotational speed at the time of reversing the engine reaches the preset starting rotational speed, a first torque value at the time of the drum reverse-dragging is recorded, and the first starting resistance is determined based on the first torque value. For another example, when the second starting resistance is obtained, the individual engine not mounted in the vehicle can be reversed by the dynamometer being reversed, the rotation speed when the engine is reversed reaches the preset starting rotation speed, the second torque value when the dynamometer is reversed is recorded, and the second starting resistance is determined according to the second torque value. The preset starting rotating speed is a standard rotating speed value when the engine is successfully started, and can be measured according to a preliminary test.
Step S20, obtaining a resistance difference value between the first starting resistance and the second starting resistance;
in this embodiment, the starting load of the engine in the whole vehicle is generally greater than the starting load of the engine alone, that is, the first starting resistance is greater than the second starting resistance, so that a resistance difference between the first starting resistance and the second starting resistance, that is, a difference between the starting load of the engine in the whole vehicle and the starting load of the engine alone, can be obtained.
Step S30, when the engine is not installed in the vehicle, loading the engine by the resistance corresponding to the resistance difference value;
in this embodiment, in order to calibrate the cold start of the engine, the engine is loaded with the resistance corresponding to the difference in resistance for the individual engine not installed in the vehicle, and an additional load is added to the engine to offset the difference between the start load of the engine in the whole vehicle and the individual start load of the engine, so that the calibration of the cold start of the engine is more accurate.
Alternatively, the engine may be loaded by a dynamometer. Specifically, the dynamometer is connected with an output shaft connected with the engine so as to be used as a load of the engine, and therefore, the engine needs to drive the dynamometer to operate during cold start, and the load is increased. The loading torque of the dynamometer can be set to be the resistance corresponding to the resistance difference value, so that the difference between the starting load of the engine in the whole vehicle and the independent starting load of the engine can be more accurately counteracted.
Step S40, the engine is started to determine calibration data of the engine.
In this embodiment, after the engine is loaded with a resistance corresponding to the difference in resistance, ignition may be performed to attempt to start the engine, calibrating a cold start of the engine. Specifically, by starting the engine with specified ECU (electronic control unit, computer control module) data, it is detected whether the engine can be started successfully, and ECU data can be optimized according to the starting condition of the engine, to complete the calibration for the cold start of the engine. The ECU data comprises control parameter curves of engine oil supply, ignition and the like, and the aims of increasing the output power of the engine, improving the torque, reducing the additional fuel consumption and the like can be achieved through optimization of the ECU data.
It should be noted that, in order to simulate the cold start environment of the engine, the steps of this embodiment are all performed in the environmental chamber, and the environmental chamber is a low-temperature environment, and the temperature is lower than a preset low-temperature threshold, for example, the preset low-temperature threshold may be-10 ℃, and the temperature of the environmental chamber is set to-30 ℃. The environment bin is used for simulating a cold start calibration environment, and calibration is carried out after the environment temperature meets the test conditions. The environment bin can be used at any time, the time and the place are not limited, the cold start calibration efficiency is greatly improved, and the development period of products is reduced.
In the technical scheme disclosed by the embodiment, the resistance errors of the engine when the engine is mounted in the vehicle and not mounted in the vehicle are detected, and the engine is loaded according to the resistance errors in calibration, so that the starting resistance of the engine in calibration is consistent with the starting resistance of the engine in actual use, the accuracy of calibration data is improved, the load of the engine is larger, the carbon deposit of the spark plug can be better eliminated, the actual use process of the spark plug is closer to that of the whole vehicle, and the actual application of the vehicle in the actual environment is more met.
In another embodiment, as shown in fig. 2, based on the embodiment shown in fig. 1, in step S10, the step of obtaining the first starting resistance when the engine is mounted in the vehicle includes:
step S11, placing a vehicle provided with an engine in an environment bin with a preset test temperature;
in this embodiment, the first actuation resistance is measured within the environmental chamber. Specifically, the whole vehicle with the engine mounted therein may be placed in an environmental bin. The ambient temperature in the ambient bin is set to a preset test temperature that is lower than a preset low temperature threshold, which may be-10 ℃, for example, and the preset test temperature is set to-30 ℃. And simulating the cold environment of the vehicle during cold start through the environment bin.
Step S12, the engine is reversed, so that the rotating speed of the engine reaches the preset starting rotating speed;
in this embodiment, the engine in the reverse-towed vehicle is rotated by the drum power, and the rotational speed of the engine is brought to a preset starting rotational speed to simulate the state of the engine when a successful cold start is performed.
Step S13, detecting a first torque value adopted by the reverse traction engine when the rotation speed of the engine reaches a preset starting rotation speed;
step S14, determining a first starting resistance according to the first torque value.
In this embodiment, when the rotational speed of the engine reaches the preset starting rotational speed, the starting load of the engine in the whole vehicle may be determined according to the first torque value adopted by the reverse-towed engine. The first torque value can be obtained by measuring the rotary drum through a torque tester.
Alternatively, since the vehicle is provided with a power transmission device such as a transmission case, a propeller shaft, or the like, the first torque value may be converted into the first starting resistance when the first starting resistance is determined from the first torque value. Specifically, the gear ratio of the gearbox and the propeller shaft may be obtained, with which the first torque value is converted into a first starting resistance of the engine itself. The transmission ratio refers to the ratio of the rotating speeds of a front transmission mechanism and a rear transmission mechanism of a speed change device in a vehicle transmission system.
In the technical scheme disclosed by the embodiment, a vehicle provided with an engine is placed in an environment bin with preset test temperature, the engine is towed backwards, so that the rotating speed of the engine reaches the preset starting rotating speed, when the rotating speed of the engine reaches the preset starting rotating speed, a first torque value adopted by the towed-backwards engine is detected, the first starting resistance is determined according to the first torque value, and the measurement of the cold starting load of the engine in the whole vehicle is realized.
In still another embodiment, as shown in fig. 3, on the basis of the embodiment shown in any one of fig. 1 to 2, the step of acquiring the second starting resistance when the engine is not mounted in the vehicle in step S10 includes:
step S15, placing an engine which is not installed in a vehicle in an environment bin with a preset test temperature;
in this embodiment, the second starting resistance is measured within the environmental chamber. In particular, a separate engine not mounted in the vehicle may be placed in the environmental chamber. The ambient temperature in the ambient bin is set to a preset test temperature that is lower than a preset low temperature threshold, which may be-10 ℃, for example, and the preset test temperature is set to-30 ℃. And simulating the cold environment of the vehicle during cold start through the environment bin.
S16, reversely dragging the engine to enable the rotating speed of the engine to reach the preset starting rotating speed;
in this embodiment, the dynamometer is used to provide power, and the engine is rotated by pulling the individual engine backward, and the rotational speed of the engine is brought to a preset starting rotational speed, so as to simulate the state of the engine when the engine is successfully cold started.
Step S17, detecting a second torque value adopted by the reverse traction engine when the rotating speed of the engine reaches a preset starting rotating speed;
step S18, determining a second starting resistance according to the second torque value.
In this embodiment, when the rotational speed of the engine reaches the preset starting rotational speed, the individual starting load of the engine may be determined according to the second torque value adopted by the reverse traction engine. Wherein the second torque value is readable from the dynamometer.
Optionally, the second torque value may be directly used as the second starting resistance, or a preset torque correction parameter may be used to correct the second torque value, so as to obtain the second starting resistance.
In the technical scheme disclosed in the embodiment, an independent engine which is not installed in a vehicle is placed in an environment bin with preset test temperature, the engine is towed backward, so that the rotating speed of the engine reaches the preset starting rotating speed, when the rotating speed of the engine reaches the preset starting rotating speed, a second torque value adopted by the towed backward engine is detected, the second starting resistance is determined according to the second torque value, and the measurement of the independent cold starting load of the engine is realized.
In yet another embodiment, as shown in fig. 4, on the basis of the embodiment shown in any one of fig. 1 to 3, step S40 includes:
step S41, starting the engine according to preset ECU data to detect whether the engine is started normally;
in the present embodiment, ECU data is preset in an ECU (electronic control unit, computer control module) to attempt to start the engine in accordance with the ECU data, and to verify the cold start capability of the engine. The ECU data comprises control parameter curves of engine oil supply, ignition and the like, and the aims of increasing the output power of the engine, improving the torque, reducing the additional fuel consumption and the like can be achieved through optimization of the ECU data.
Step S42, when the engine is started normally, the calibration data of the engine are determined according to the preset ECU data.
In this embodiment, when the engine is started normally, it is indicated that the current cold start capability of the engine is good, so that the calibration data of the engine can be determined according to the preset ECU data. For example, a calibration load model of the engine cold start is established according to preset ECU data, and calibration of the engine cold start is completed.
Alternatively, when the engine is not started normally, indicating that the current cold start capability of the engine is poor, the preset ECU data may be adjusted to optimize the preset ECU data. And (4) returning to the execution step S41 by adopting the adjusted preset ECU data, and realizing continuous optimization of the ECU data based on the engine starting effect.
In the technical scheme disclosed by the embodiment, the engine is started according to the preset ECU data so as to detect whether the engine is started normally, and when the engine is started normally, the calibration data of the engine is determined according to the preset ECU data so as to realize the verification of the cold starting capability of the engine.
In addition, the embodiment of the invention also provides a calibration device for cold starting of the engine, which comprises: the system comprises a memory, a processor and a calibration program of the engine cold start, wherein the calibration program of the engine cold start is stored in the memory and can run on the processor, and the calibration program of the engine cold start realizes the steps of the calibration method of the engine cold start according to each embodiment when being executed by the processor.
In addition, the embodiment of the invention also provides an engine cold start calibration device, which comprises an environment cabin, a dynamometer and a controller, wherein the environment cabin is used for placing a vehicle with the engine installed and/or placing an engine which is not installed in the vehicle, the dynamometer is used for loading the engine with resistance corresponding to the resistance difference, and the controller is used for executing the steps of the engine cold start calibration method according to the above embodiments.
As shown in fig. 5, fig. 5 is a schematic diagram of a terminal structure of a hardware running environment according to an embodiment of the present invention.
The terminal of the embodiment of the invention is a calibration device for cold starting of an engine, such as a console for calibrating cold starting of a vehicle.
As shown in fig. 5, the terminal may include: a processor 1001, e.g. CPU, DSP, MCU, a network interface 1004, a user interface 1003, a memory 1005, a communication bus 1002. Wherein the communication bus 1002 is used to enable connected communication between these components. The user interface 1003 may include a Display, an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may further include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory 1005 may be a high-speed RAM memory or a stable memory (non-volatile memory), such as a disk memory. The memory 1005 may also optionally be a storage device separate from the processor 1001 described above.
It will be appreciated by those skilled in the art that the terminal structure shown in fig. 5 is not limiting of the terminal and may include more or fewer components than shown, or may combine certain components, or a different arrangement of components.
As shown in fig. 5, a memory 1005, which is a computer storage medium, may include a network communication module, a user interface module, and a calibration routine for engine cold start.
In the terminal shown in fig. 5, the network interface 1004 is mainly used for connecting to a background server and performing data communication with the background server; the user interface 1003 is mainly used for connecting a client (user side) and performing data communication with the client; and the processor 1001 may be configured to invoke the calibration routine for a cold start of the engine stored in the memory 1005 and to perform the following operations:
acquiring a first starting resistance when the engine is mounted in the vehicle and acquiring a second starting resistance when the engine is not mounted in the vehicle;
acquiring a resistance difference value between the first starting resistance and the second starting resistance;
when the engine is not installed in the vehicle, loading the engine by the resistance corresponding to the resistance difference value;
the engine is started to determine calibration data for the engine.
Further, the processor 1001 may call a calibration procedure for engine cold start stored in the memory 1005, and further perform the following operations:
placing a vehicle provided with an engine in an environment bin with a preset test temperature;
the engine is reversed towed so that the rotating speed of the engine reaches the preset starting rotating speed;
detecting a first torque value adopted by the reverse-towing engine when the rotating speed of the engine reaches a preset starting rotating speed;
a first starting resistance is determined according to the first torque value.
Further, the processor 1001 may call a calibration procedure for engine cold start stored in the memory 1005, and further perform the following operations:
acquiring the transmission ratio of a gearbox and a transmission shaft of a vehicle;
a first starting resistance is determined according to the gear ratio and the first torque value.
Further, the processor 1001 may call a calibration procedure for engine cold start stored in the memory 1005, and further perform the following operations:
placing an engine which is not installed in a vehicle in an environment bin with a preset test temperature;
the engine is reversed towed so that the rotating speed of the engine reaches the preset starting rotating speed;
detecting a second torque value adopted by the reverse-towing engine when the rotating speed of the engine reaches a preset starting rotating speed;
a second starting resistance is determined from the second torque value.
Further, the processor 1001 may call a calibration procedure for engine cold start stored in the memory 1005, and further perform the following operations:
connecting the engine with the dynamometer to take the dynamometer as the load of the engine;
and adjusting the loading torque of the dynamometer to the resistance corresponding to the resistance difference value.
Further, the processor 1001 may call a calibration procedure for engine cold start stored in the memory 1005, and further perform the following operations:
starting the engine according to preset ECU data to detect whether the engine is started normally;
and when the engine is started normally, determining the calibration data of the engine according to the preset ECU data.
Further, the processor 1001 may call a calibration procedure for engine cold start stored in the memory 1005, and further perform the following operations:
when the engine is not started normally, adjusting preset ECU data;
and returning to the step of executing the engine starting according to the preset ECU data to detect whether the engine is started normally or not by adopting the adjusted preset ECU data.
In addition, the embodiment of the invention also provides a computer storage medium, wherein the computer storage medium stores a calibration program of the engine cold start, and the calibration program of the engine cold start realizes the steps of the calibration method of the engine cold start in each embodiment when being executed by a processor.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) as described above, comprising instructions for causing a terminal device (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method according to the embodiments of the present invention.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.
Claims (8)
1. A method for calibrating a cold start of an engine, the method comprising:
acquiring a first starting resistance when the engine is mounted in the vehicle and acquiring a second starting resistance when the engine is not mounted in the vehicle;
acquiring a resistance difference value between the first starting resistance and the second starting resistance;
when the engine is not installed in the vehicle, loading the engine by the resistance corresponding to the resistance difference value;
starting the engine to determine calibration data for the engine;
the starting the engine to determine calibration data for the engine includes:
after loading the engine with the resistance corresponding to the resistance difference, igniting the engine to determine calibration data of the cold start of the engine;
the step of obtaining a first starting resistance when the engine is installed in the vehicle includes:
placing a vehicle provided with an engine in an environment bin with a preset test temperature;
the engine is reversed towed so that the rotating speed of the engine reaches the preset starting rotating speed;
detecting a first torque value adopted by the reverse-towing engine when the rotating speed of the engine reaches a preset starting rotating speed;
determining a first starting resistance according to the first torque value;
the step of obtaining the second starting resistance when the engine is not mounted in the vehicle includes:
placing an engine which is not installed in a vehicle in an environment bin with a preset test temperature;
the engine is reversed towed so that the rotating speed of the engine reaches the preset starting rotating speed;
detecting a second torque value adopted by the reverse-towing engine when the rotating speed of the engine reaches a preset starting rotating speed;
a second starting resistance is determined from the second torque value.
2. The method of calibrating a cold start of an engine according to claim 1, wherein the step of determining a first starting resistance based on the first torque value comprises:
acquiring the transmission ratio of a gearbox and a transmission shaft of a vehicle;
a first starting resistance is determined according to the gear ratio and the first torque value.
3. The method for calibrating a cold start of an engine according to claim 1, wherein the step of loading the engine with a resistance corresponding to the difference in resistance comprises:
connecting the engine with the dynamometer to take the dynamometer as the load of the engine;
and adjusting the loading torque of the dynamometer to the resistance corresponding to the resistance difference value.
4. The method of calibrating a cold start of an engine according to claim 1, wherein the step of starting the engine to determine calibration data for the engine comprises:
starting the engine according to preset ECU data to detect whether the engine is started normally;
and when the engine is started normally, determining the calibration data of the engine according to the preset ECU data.
5. The method for calibrating a cold start of an engine according to claim 4, wherein after the step of starting the engine according to the preset ECU data to detect whether the engine is started normally, further comprising:
when the engine is not started normally, adjusting preset ECU data;
and returning to the step of executing the engine starting according to the preset ECU data to detect whether the engine is started normally or not by adopting the adjusted preset ECU data.
6. A calibration device for cold starting of an engine, the calibration device comprising: memory, a processor and a calibration procedure for cold starting of an engine stored on the memory and executable on the processor, which calibration procedure for cold starting of an engine, when executed by the processor, implements the steps of the calibration method for cold starting of an engine according to any one of claims 1 to 5.
7. An engine cold start calibration apparatus, characterized in that it comprises an environmental compartment for placing a vehicle with an engine mounted therein and/or for placing an engine not mounted therein, a dynamometer for loading the engine with a resistance corresponding to the difference in resistance, and a controller for executing the steps of the engine cold start calibration method according to any one of claims 1 to 5.
8. A computer storage medium, characterized in that it has stored thereon a calibration procedure for a cold start of an engine, which when executed by a processor implements the steps of the calibration method for a cold start of an engine according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111456051.1A CN114088406B (en) | 2021-11-30 | 2021-11-30 | Calibration method, device and equipment for engine cold start and computer storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111456051.1A CN114088406B (en) | 2021-11-30 | 2021-11-30 | Calibration method, device and equipment for engine cold start and computer storage medium |
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