CN114088406A - Calibration method, device and equipment for cold start of engine and computer storage medium - Google Patents
Calibration method, device and equipment for cold start of engine and computer storage medium Download PDFInfo
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- CN114088406A CN114088406A CN202111456051.1A CN202111456051A CN114088406A CN 114088406 A CN114088406 A CN 114088406A CN 202111456051 A CN202111456051 A CN 202111456051A CN 114088406 A CN114088406 A CN 114088406A
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- 230000005540 biological transmission Effects 0.000 claims description 14
- 238000012360 testing method Methods 0.000 claims description 14
- 230000007613 environmental effect Effects 0.000 claims description 7
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- 238000004891 communication Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 239000000446 fuel Substances 0.000 description 5
- 238000005457 optimization Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000010705 motor oil Substances 0.000 description 2
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- 239000000203 mixture Substances 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
Abstract
The invention discloses a calibration method, a device and equipment for cold start of an engine and a computer storage medium, wherein the method comprises the following steps: 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; acquiring a resistance difference value of the first starting resistance and the second starting resistance; when the engine is not installed in the vehicle, loading the engine by resistance corresponding to the resistance difference; the engine is started to determine calibration data for the engine. The invention can load the engine according to the resistance error when the engine is installed in the vehicle or not installed in the vehicle during calibration, so that the starting resistance of the engine during calibration is consistent with the starting resistance of the engine during actual use, thereby improving the accuracy of calibration data.
Description
Technical Field
The invention relates to the technical field of cold start, in particular to a calibration method, a device, equipment and a computer storage medium for cold start of an engine.
Background
In the winter where the temperature is low, particularly at-10 to 30 ℃, methanol fuel cannot form a good fuel mixture gas, and the engine efficiency is greatly reduced. And the methanol fuel is easy to be adsorbed on the air channel wall under the influence of low temperature, the oil viscosity of the gearbox is also increased, the rotation resistance is also large, the engine is difficult to start, and the probability of vehicle starting failure is increased finally. Therefore, calibration for the cold start of the vehicle is needed to reduce the failure of the cold start of the vehicle.
At present, the environment of a severe cold area is simulated through an environment cabin, and an engine is calibrated in the environment cabin. 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 calibration method, a device and equipment for cold start of an engine and a computer storage medium, aiming at improving the accuracy of calibration data for cold start of the engine.
In order 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 installed in the vehicle, and acquiring a second starting resistance when the engine is not installed in the vehicle;
acquiring a resistance difference value of the first starting resistance and the second starting resistance;
when the engine is not installed in the vehicle, loading the engine by resistance corresponding to the resistance difference;
the engine is started to determine calibration data for the engine.
Optionally, 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 cabin with a preset test temperature;
towing the engine backwards to enable the rotating speed of the engine to reach a preset starting rotating speed;
detecting a first torque value adopted by the engine to be towed backwards when the rotating speed of the engine reaches a preset starting rotating speed;
a first starting resistance is determined from the first torque value.
Optionally, the step of determining a first starting resistance from 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 based on the gear ratio and the first torque value.
Optionally, the step of obtaining a second starting resistance when the engine is not installed in the vehicle comprises:
placing an engine which is not installed in a vehicle in an environment cabin with a preset test temperature;
towing the engine backwards to enable the rotating speed of the engine to reach a preset starting rotating speed;
detecting a second torque value adopted by the engine to be towed backwards when the rotating speed of the engine reaches a preset starting rotating speed;
a second launch resistance is determined based on the second torque value.
Optionally, the step of loading the engine with the resistance corresponding to the resistance difference comprises:
connecting the engine with a dynamometer to use 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 for the engine comprises:
starting the engine according to preset ECU data to detect whether the engine is normally started;
and when the engine is normally started, 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 normally started, the method further includes:
when the engine is not normally started, adjusting preset ECU data;
and returning to the step of starting the engine according to the preset ECU data by adopting the adjusted preset ECU data so as to detect whether the engine is normally started.
In addition, in order to achieve the above object, the present invention further provides a calibration apparatus for a cold start of an engine, including: the calibration program for the cold start of the engine is stored on the memory and can run on the processor, and when executed by the processor, the calibration program for the cold start of the engine realizes the steps of the calibration method for the cold start of the engine as described in any one of the above.
In addition, in order to achieve the above object, the present invention further provides a calibration apparatus for cold start of an engine, the calibration apparatus for cold start of an engine includes an environmental chamber for placing a vehicle mounted with the engine and/or for placing the engine not mounted in the vehicle, a dynamometer for loading the engine with resistance corresponding to a difference of the resistance, and a controller for executing the steps of the calibration method for cold start of an engine as described in any one of the above.
In addition, to achieve the above object, the present invention further provides a computer storage medium having a calibration program for an engine cold start stored thereon, wherein the calibration program for the engine cold start, when executed by a processor, implements the steps of the calibration method for the engine cold start as described in any one of the above.
The calibration method, the calibration device, the calibration equipment and the computer storage medium for the cold start of the engine provided by the embodiment of the invention are used for acquiring a first starting resistance when the engine is installed in a vehicle and acquiring a second starting resistance when the engine is not installed in the vehicle; acquiring a resistance difference value of the first starting resistance and the second starting resistance; when the engine is not installed in the vehicle, loading the engine by resistance corresponding to the resistance difference; the engine is started to determine calibration data for the engine. The invention can load the engine according to the resistance error when the engine is installed in the vehicle or not installed in the vehicle during calibration, so that the starting resistance of the engine during calibration is consistent with the starting resistance of the engine during actual use, thereby improving the accuracy of calibration data.
Drawings
FIG. 1 is a schematic flow chart diagram illustrating an embodiment of a method for calibrating a cold start of an engine according to the present invention;
FIG. 2 is a schematic flow chart diagram illustrating another embodiment of a method for calibrating a cold start of an engine according to the present invention;
FIG. 3 is a schematic flow chart diagram illustrating a method for calibrating a cold start of an engine according to yet another embodiment of the present invention;
FIG. 4 is a schematic flow chart diagram illustrating a method for calibrating a cold start of an engine according to another embodiment of the present invention;
fig. 5 is a schematic terminal structure diagram of a hardware operating environment according to an embodiment of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The embodiment of the invention provides a solution, which is characterized in that the starting resistance of the engine during calibration is consistent with the starting resistance of the engine during actual use by detecting the resistance error of the engine when the engine is installed in a vehicle or not installed in the vehicle and loading the engine according to the resistance error during calibration, so that 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:
a step S10 of 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 starting load of the engine alone is not consistent with the starting load of the engine in the entire vehicle, the first starting resistance when the engine is mounted in the vehicle and the second starting resistance when the engine is not mounted in the vehicle can be obtained. The first starting resistance is the starting load of the engine in the entire vehicle. The second starting resistance is a starting load of the engine alone.
Alternatively, the engine may be towed backwards by a dynamometer, a rotating drum, or the like to tow the engine speed backwards to a preset starting speed, and the first starting resistance and/or the second starting resistance may be determined according to the torque of the towed engine. For example, when the first starting resistance is acquired, the engine mounted in the vehicle may be reversed by the drum drag, the rotation speed at the time of the engine reverse reaches the preset starting rotation speed, a first torque value at the time of the drum drag 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 separate engine not mounted in the vehicle may be reversed by the dynamometer for dragging, the rotation speed when the engine is reversed reaches the preset starting rotation speed, the second torque value when the dynamometer is dragged for dragging is recorded, and the second starting resistance is determined based on 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 previous test.
Step S20, acquiring a resistance difference value between the first starting resistance and the second starting resistance;
in the embodiment, the starting load of the engine in the whole vehicle is usually larger than the starting load of the engine alone, that is, the first starting resistance is larger than the second starting resistance, so that the resistance difference between the first starting resistance and the second starting resistance can be obtained, that is, the difference between the starting load of the engine in the whole vehicle and the starting load of the engine alone is obtained.
Step S30, when the engine is not installed in the vehicle, loading the engine with resistance corresponding to the resistance difference;
in the embodiment, in order to calibrate the cold start of the engine, the resistance corresponding to the difference of the resistances is applied to the engine which is not installed in the vehicle, so that the extra load is added to the engine to offset the difference between the starting load of the engine in the whole vehicle and the single starting load of the engine, and 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 to an output shaft connected to the engine to use the dynamometer as a load of the engine, so that the dynamometer needs to be driven to operate when the engine is cold started, and the load increases. The loading torque of the dynamometer can be set as 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 single starting load of the engine can be more accurately offset.
In step S40, the engine is started to determine calibration data for the engine.
In this embodiment, after loading the engine with the resistance corresponding to the difference in resistance, ignition may be performed to attempt to start the engine, calibrating for a cold start of the engine. Specifically, by starting the engine with a designated ECU (electronic control unit) data, it is detected whether the engine can be successfully started, and the ECU data can be optimized according to the starting condition of the engine, completing the calibration for the cold start of the engine. The ECU data comprise 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 extra fuel consumption and the like can be achieved through the optimization of the ECU data.
It should be noted that, in order to simulate the environment of the engine cold start, the steps of this embodiment are all performed in the environment cabin, and the environment cabin 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 environment cabin 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 environmental chamber 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 the product is shortened.
In the technical scheme disclosed by the embodiment, the resistance error of the engine is detected when the engine is installed in the vehicle and not installed in the vehicle, and the engine is loaded according to the resistance error during calibration, so that the starting resistance of the engine during calibration is consistent with the starting resistance of the engine during actual use, the accuracy of calibration data is improved, the load of the engine is larger, the carbon deposit of a spark plug can be better eliminated, the carbon deposit is closer to the actual use process of the whole vehicle, and the actual application of the vehicle in the actual environment is better met.
In another embodiment, as shown in fig. 2, based on the embodiment shown in fig. 1, the step of obtaining the first starting resistance when the engine is installed in the vehicle in step S10 includes:
step S11, placing the vehicle with the engine in an environment cabin with a preset test temperature;
in this embodiment, the first starting resistance is measured within the environmental chamber. Specifically, the entire vehicle with the engine mounted thereon 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-30 ℃. The cold environment in which the vehicle is in cold start is simulated through the environment cabin.
Step S12, dragging the engine backwards to make the rotating speed of the engine reach the preset starting rotating speed;
in this embodiment, the engine in the vehicle is towed by the drum to rotate and the engine speed is brought to the preset starting speed to simulate the condition when the engine is successfully cold started.
Step S13, detecting a first torque value adopted by the engine to be towed backwards when the rotating speed of the engine reaches a preset starting rotating speed;
in step S14, a first starting resistance is determined based on the first torque value.
In the embodiment, when the rotating speed of the engine reaches the preset starting rotating speed, the starting load of the engine in the whole vehicle can be determined according to the first torque value adopted by the engine in the back-dragging mode. Wherein, the first torque value can be obtained by measuring the rotating drum by 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, when the first starting resistance is determined from the first torque value, the first torque value may be converted into the first starting resistance. In particular, the transmission ratio of the gearbox and of the propeller shaft can be obtained, which is used to convert the first torque value into a first starting resistance of the engine itself. The transmission ratio refers to the ratio of the rotating speeds of the front transmission mechanism and the rear transmission mechanism of the transmission device in the vehicle transmission system.
In the technical scheme disclosed in the embodiment, a vehicle provided with an engine is placed in an environment cabin with a preset test temperature, the engine is dragged backwards to enable the rotating speed of the engine to reach a preset starting rotating speed, when the rotating speed of the engine reaches the preset starting rotating speed, a first torque value adopted by the engine dragging backwards is detected, a 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, the step of obtaining the second starting resistance when the engine is not installed in the vehicle in step S10 on the basis of the embodiment shown in any one of fig. 1 to 2 includes:
step S15, placing an engine which is not installed in the vehicle in an environment cabin with a preset test temperature;
in this embodiment, the second starting resistance is measured within the environmental chamber. Specifically, a separate engine not mounted in the vehicle may be placed in the environmental compartment. 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-30 ℃. The cold environment in which the vehicle is in cold start is simulated through the environment cabin.
Step S16, dragging the engine backwards to make the rotating speed of the engine reach the preset starting rotating speed;
in this embodiment, the dynamometer provides power to pull the engine alone back up and bring the engine speed to the preset starting speed to simulate the condition when the engine is successfully cold started.
Step S17, when the rotating speed of the engine reaches the preset starting rotating speed, detecting a second torque value adopted by the engine to be dragged backwards;
in step S18, a second starting resistance is determined based on the second torque value.
In the present embodiment, when the rotational speed of the engine reaches the preset starting rotational speed, the engine-only starting load may be determined based on the second torque value employed for towing the engine upside down. Wherein the second torque value is readable from the dynamometer.
Alternatively, the second torque value may be directly used as the second starting resistance, or the second torque value may be corrected by using a preset torque correction parameter 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 cabin with a preset test temperature, the engine is dragged backwards to enable the rotating speed of the engine to reach a preset starting rotating speed, a second torque value adopted by the engine dragging backwards is detected when the rotating speed of the engine reaches the preset starting rotating speed, 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 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 the preset ECU data to detect whether the engine is started normally;
in the present embodiment, ECU (electronic control unit) data is set in advance in an ECU to attempt to start the engine in accordance with the ECU data and verify the cold start capability of the engine. The ECU data comprise 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 extra fuel consumption and the like can be achieved through the optimization of the ECU data.
In step S42, when the engine is normally started, calibration data of the engine is determined based on the preset ECU data.
In the present embodiment, at the time of normal engine start, it is indicated that the current cold start capability of the engine is good, and therefore the calibration data of the engine can be determined based on the preset ECU data. For example, a calibration load model of the cold start of the engine is established according to preset ECU data, and the calibration of the cold start of the engine is completed.
Alternatively, the preset ECU data may be adjusted to optimize the preset ECU data when the engine is not normally started, indicating that the current cold start capability of the engine is poor. And returning to the step of 41 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 in the embodiment, the engine is started according to the preset ECU data to detect whether the engine is normally started or not, and when the engine is normally started, the calibration data of the engine is determined according to the preset ECU data to realize the verification of the cold starting capability of the engine.
In addition, an embodiment of the present invention further provides a calibration apparatus for engine cold start, where the calibration apparatus for engine cold start includes: the calibration program for the cold start of the engine is stored on the memory and can run on the processor, and when being executed by the processor, the calibration program for the cold start of the engine realizes the steps of the calibration method for the cold start of the engine as described in the above embodiments.
In addition, the embodiment of the invention also provides a calibration device for the cold start of the engine, which comprises an environment cabin, a dynamometer and a controller, wherein the environment cabin is used for placing a vehicle provided with the engine and/or placing the engine not arranged 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 calibration method for the cold start of the engine in the above embodiments.
As shown in fig. 5, fig. 5 is a schematic terminal structure diagram of a hardware operating environment according to an embodiment of the present invention.
The embodiment of the invention is terminated by a calibration device for cold start of an engine, for example, a console for calibrating cold start of a vehicle.
As shown in fig. 5, the terminal may include: a processor 1001, such as a CPU, DSP, MCU, network interface 1004, user interface 1003, memory 1005, communication bus 1002. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also 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 non-volatile memory (e.g., a magnetic disk memory). The memory 1005 may alternatively be a storage device separate from the processor 1001.
Those skilled in the art will appreciate that the terminal structure shown in fig. 5 is not intended to be limiting and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 5, a memory 1005, which is a kind of computer storage medium, may include therein a network communication module, a user interface module, and a calibration program for cold start of the engine.
In the terminal shown in fig. 5, the network interface 1004 is mainly used for connecting to a backend server and performing data communication with the backend 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 a calibration routine for a cold start of the engine stored in the memory 1005 and perform the following operations:
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;
acquiring a resistance difference value of the first starting resistance and the second starting resistance;
when the engine is not installed in the vehicle, loading the engine by resistance corresponding to the resistance difference;
the engine is started to determine calibration data for the engine.
Further, the processor 1001 may call a calibration routine for a cold start of the engine stored in the memory 1005, and also perform the following operations:
placing a vehicle provided with an engine in an environment cabin with a preset test temperature;
towing the engine backwards to enable the rotating speed of the engine to reach a preset starting rotating speed;
detecting a first torque value adopted by the engine to be towed backwards when the rotating speed of the engine reaches a preset starting rotating speed;
a first starting resistance is determined from the first torque value.
Further, the processor 1001 may call a calibration routine for a cold start of the engine stored in the memory 1005, and also perform the following operations:
acquiring the transmission ratio of a gearbox and a transmission shaft of a vehicle;
a first starting resistance is determined based on the gear ratio and the first torque value.
Further, the processor 1001 may call a calibration routine for a cold start of the engine stored in the memory 1005, and also perform the following operations:
placing an engine which is not installed in a vehicle in an environment cabin with a preset test temperature;
towing the engine backwards to enable the rotating speed of the engine to reach a preset starting rotating speed;
detecting a second torque value adopted by the engine to be towed backwards when the rotating speed of the engine reaches a preset starting rotating speed;
a second launch resistance is determined based on the second torque value.
Further, the processor 1001 may call a calibration routine for a cold start of the engine stored in the memory 1005, and also perform the following operations:
connecting the engine with a dynamometer to use 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 routine for a cold start of the engine stored in the memory 1005, and also perform the following operations:
starting the engine according to preset ECU data to detect whether the engine is normally started;
and when the engine is normally started, determining the calibration data of the engine according to the preset ECU data.
Further, the processor 1001 may call a calibration routine for a cold start of the engine stored in the memory 1005, and also perform the following operations:
when the engine is not normally started, adjusting preset ECU data;
and returning to the step of starting the engine according to the preset ECU data by adopting the adjusted preset ECU data so as to detect whether the engine is normally started.
In addition, an embodiment of the present invention further provides a computer storage medium, where the computer storage medium stores a calibration program for an engine cold start, and the calibration program for the engine cold start, when executed by a processor, implements the steps of the calibration method for the engine cold start described in the above embodiments.
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 an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A method for calibrating a cold start of an engine, the method comprising:
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;
acquiring a resistance difference value of the first starting resistance and the second starting resistance;
when the engine is not installed in the vehicle, loading the engine by resistance corresponding to the resistance difference;
the engine is started to determine calibration data for the engine.
2. The method for calibrating a cold start of an engine as recited in claim 1, wherein said step of obtaining a first starting resistance when the engine is installed in a vehicle comprises:
placing a vehicle provided with an engine in an environment cabin with a preset test temperature;
towing the engine backwards to enable the rotating speed of the engine to reach a preset starting rotating speed;
detecting a first torque value adopted by the engine to be towed backwards when the rotating speed of the engine reaches a preset starting rotating speed;
a first starting resistance is determined from the first torque value.
3. A method of calibrating a cold start of an engine as recited in claim 2, wherein said step of determining a first starting resistance based on a first torque value comprises:
acquiring the transmission ratio of a gearbox and a transmission shaft of a vehicle;
a first starting resistance is determined based on the gear ratio and the first torque value.
4. The method for calibrating a cold start of an engine as recited in claim 1, wherein said step of obtaining a second starting resistance when the engine is not installed in a vehicle comprises:
placing an engine which is not installed in a vehicle in an environment cabin with a preset test temperature;
towing the engine backwards to enable the rotating speed of the engine to reach a preset starting rotating speed;
detecting a second torque value adopted by the engine to be towed backwards when the rotating speed of the engine reaches a preset starting rotating speed;
a second launch resistance is determined based on the second torque value.
5. The method for calibrating a cold start of an engine as recited in claim 1, wherein said step of loading the engine with a resistance corresponding to the difference in resistance comprises:
connecting the engine with a dynamometer to use 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.
6. A method of calibrating a cold start of an engine as recited in claim 1, wherein said 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 normally started;
and when the engine is normally started, determining the calibration data of the engine according to the preset ECU data.
7. The method for calibrating a cold start of an engine as recited in claim 6, wherein said step of starting the engine according to predetermined ECU data to detect whether the engine is normally started further comprises:
when the engine is not normally started, adjusting preset ECU data;
and returning to the step of starting the engine according to the preset ECU data by adopting the adjusted preset ECU data so as to detect whether the engine is normally started.
8. A calibration device for cold start of an engine is characterized by comprising: memory, a processor and a calibration routine for a cold start of an engine stored on the memory and operable on the processor, the calibration routine for a cold start of an engine when executed by the processor implementing the steps of the calibration method for a cold start of an engine as claimed in any one of claims 1 to 7.
9. Calibration device for cold start of an engine, characterized in that it comprises an environmental chamber for housing a vehicle with the engine mounted thereon and/or for housing an engine not mounted in the vehicle, a dynamometer for loading the engine with a resistance corresponding to the difference in resistance, and a controller for carrying out the steps of the calibration method for cold start of an engine as claimed in any one of claims 1 to 7.
10. A computer storage medium, characterized in that the computer storage medium has stored thereon a calibration program for a cold start of an engine, which when executed by a processor implements the steps of a calibration method for a cold start of an engine as claimed in any one of claims 1 to 7.
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 |
Publications (2)
| Publication Number | Publication Date |
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| CN115144175B (en) * | 2022-04-27 | 2024-04-30 | 中国北方车辆研究所 | Low-temperature starting resistance test and data processing method for comprehensive transmission device |
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