CN112710472A - Engine cold start test method and device - Google Patents
Engine cold start test method and device Download PDFInfo
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- CN112710472A CN112710472A CN202011549275.2A CN202011549275A CN112710472A CN 112710472 A CN112710472 A CN 112710472A CN 202011549275 A CN202011549275 A CN 202011549275A CN 112710472 A CN112710472 A CN 112710472A
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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
- G01M15/02—Details or accessories of testing apparatus
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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
- G01M15/04—Testing internal-combustion engines
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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
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
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Abstract
The application relates to the technical field of automobiles, and discloses an engine cold start test method and device, wherein the method comprises the steps of obtaining the engine speed, the engine load and the duration under the working condition of the whole automobile; controlling engine operation based on engine speed and engine load; when the running time of the engine reaches the duration, the engine is shut down; cycling the engine on and engine off process; and when the cold start test of the engine is finished, counting the successful starting times of the engine. The cold start test method and the cold start test device for the engine can test and improve the cold start performance of the vehicle in time.
Description
Technical Field
The application relates to the technical field of vehicles, in particular to a cold start test method and device for an engine.
Background
The use environment of the vehicle is complex and various, and different geographical environments and climatic environments have different requirements on the design of the vehicle. The cold start performance is an important index for evaluating the performance of the whole vehicle.
In the related technology, the test conditions of the low-temperature cold start of the whole vehicle can be generally divided into three types: the system comprises a low-temperature cabin, a low-temperature hub rotating environment cabin and a low-temperature environment road test field. The low-temperature cold start test requires that the engine is filled with enough antifreeze and lubricating oil, and a fully charged storage battery and fuel oil are placed into a specified low-temperature environment together, and the cold start performance of the engine is comprehensively verified when the temperatures of the electrolyte, the antifreeze and the lubricating oil of the storage battery reach +/-1 ℃ of the specified environment temperature. The low-temperature cold start quality of the engine can be matched with the whole vehicle to be put on the market only by fully meeting the design requirement.
In the course of implementing the present application, the inventors found that the related art has at least the following problems:
the existing cold start tests all use the whole vehicle as a test object, and the tests are carried out in the middle and later stages of the development of the whole vehicle, so that the cold start performance of the vehicle cannot be improved in time.
Disclosure of Invention
In view of this, the present application provides an engine cold start testing method and apparatus, which can test and improve the cold start performance of a vehicle in time. Specifically, the method comprises the following technical scheme:
the embodiment of the application provides an engine cold start test method, which comprises the following steps:
acquiring the engine speed, the engine load and the duration under the working condition of the whole vehicle;
controlling engine operation based on the engine speed and the engine load;
shutting down the engine when the operating time of the engine reaches the duration;
cycling the engine on and the engine stall process;
and when the cold start test of the engine is finished, counting the successful starting times of the engine.
In an implementation manner of the embodiment of the application, the working condition of the whole vehicle includes at least one of an idling working condition, a steady-state running working condition, an acceleration working condition, a deceleration working condition and a rapid acceleration working condition.
In one implementation manner of the embodiment of the present application, before controlling the operation of the engine based on the engine speed and the engine load, the method further includes:
and enabling the engine and the whole vehicle to be in the same test condition.
In one implementation of the embodiment of the present application, the cycling the engine operation and the engine stall process includes:
and after the engine is flamed out for a set time, carrying out the operation process of the engine of the next cycle.
In one implementation manner of the embodiment of the present application, when the engine cold start test is finished, counting the number of times of successful start of the engine includes:
when the engine fails to start continuously for three times, ending the cold start test of the engine, and recording the actual cycle number of the engine before the first start failure, wherein the actual cycle number is the successful start number of the engine;
or when the cycle number of the engine reaches a set cycle number, ending the cold start test of the engine, wherein the set cycle number is the successful number of the running of the engine.
The embodiment of the present application further provides an engine cold start test device, the device includes:
the acquisition module is configured to acquire the engine speed, the engine load and the duration under the working condition of the whole vehicle;
an operation module configured to control engine operation based on the engine speed and the engine load;
a shutdown module configured to shutdown the engine after the operating time of the engine reaches the duration;
a cycling module configured to cycle the engine operation and the engine shutdown process;
a counting module configured to count a number of successful starts of the engine at an end of the engine cold start test.
In an implementation manner of the embodiment of the application, the working condition of the whole vehicle includes at least one of an idling working condition, a steady-state running working condition, an acceleration working condition, a deceleration working condition and a rapid acceleration working condition.
In an implementation manner of the embodiment of the present application, the apparatus further includes:
a condition module configured to subject the engine and the entire vehicle to the same test conditions.
In one implementation of the embodiment of the present application, the cycle module is further configured to perform the engine operation process of a next cycle after the engine stall continues for a set time.
In an implementation manner of the embodiment of the present application, the statistics module is further configured to:
when the engine fails to start continuously for three times, ending the cold start test of the engine, and recording the actual cycle number of the engine before the first start failure, wherein the actual cycle number is the successful start number of the engine;
or when the cycle number of the engine reaches a set cycle number, ending the cold start test of the engine, wherein the set cycle number is the successful number of the running of the engine.
The technical scheme provided by the embodiment of the application has the beneficial effects that at least:
compared with the traditional cold start test method using a whole vehicle as a test object, the cold start test method of the engine provided by the embodiment of the application controls the single engine to run under the same working condition in a low-temperature environment according to the engine speed, the engine load and the duration under the working condition of the whole vehicle, and circulates the running and flameout processes of the engine to carry out repeated cold start tests, can evaluate the cold start performance of the vehicle in advance, and reduces the development period and difficulty of low-temperature repeated cold start of the whole vehicle.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram illustrating a cold start test system of an engine according to an embodiment of the present disclosure;
FIG. 2 is a schematic flow chart illustrating a method for testing an engine cold start provided by an embodiment of the present application;
FIG. 3 is a schematic flow chart diagram illustrating another engine cold start test method provided by an embodiment of the present application;
fig. 4 shows a schematic structural diagram of an engine cold start test device provided by an embodiment of the present application.
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 some, but not all, embodiments of the present application. 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. In order to make the technical scheme and advantages of the present application clearer, the engine cold start test method and the like will be described in detail below with reference to the accompanying drawings.
The application provides an engine cold start test method which is applied to an engine cold start test system. As shown in FIG. 1, the engine cold start test system comprises a bench test chamber, a low-temperature chamber, an exhaust system, an air intake system, a cooling system, a dynamometer and a control console.
A cryogenic chamber may be disposed within the bench laboratory, and the temperature within the cryogenic chamber may be regulated. The engine is disposed within the cold chamber, and a cold start environment of the engine can be simulated while maintaining the temperature of the cold chamber at a lower temperature.
One end of the exhaust system is connected to an exhaust pipe of the engine, and the other end of the exhaust system is connected to the outside of the low-temperature cabin, so that tail gas of the engine is exhausted to the outside of the low-temperature cabin, and the temperature environment in the low-temperature cabin is prevented from being influenced.
An intake system is connected to an intake pipe of the engine, and the intake system can provide air required for engine operation to the engine. And, the air intake system may be located entirely within the cold box to maintain the intake air temperature of the engine consistent with the cold start environment.
A cooling system is connected to the cooling passages inside the engine, which may assist the engine in achieving heat dissipation. The running environment of the engine in the whole vehicle can be simulated by the exhaust system, the air intake system and the cooling system.
The dynamometer is connected with the engine and can be positioned in a bench test chamber, so that parameters such as load, torque and the like of the engine can be measured nearby.
A control console is connected to the engine and can be located outside the bench test chamber to ensure the safety of the test personnel. The tester can control the opening and closing of the engine, the rotating speed and the load of the running of the engine and the like through the control console.
FIG. 2 is a schematic flow chart illustrating an engine cold start test method according to an embodiment of the present disclosure. As shown in fig. 2, the engine cold start test method includes:
s201, obtaining the engine speed, the engine load and the duration under the working condition of the whole vehicle;
s202, controlling the engine to run based on the engine speed and the engine load;
s203, stopping the engine when the running time of the engine reaches the duration;
s204, circulating the engine operation and the engine flameout process;
and S205, counting the successful starting times of the engine when the cold starting test of the engine is finished.
Alternatively, the vehicle operating condition may include at least one of an idle operating condition, a steady-state driving operating condition, an acceleration operating condition, a deceleration operating condition, and a rapid acceleration operating condition.
Optionally, before controlling the engine to operate based on the engine speed and the engine load, the method may further include:
the engine and the whole vehicle are in the same test condition.
Alternatively, cycling the engine on and engine off process may include:
and after the engine is flamed out for a set time, carrying out the engine running process of the next cycle.
Optionally, counting the number of successful engine starts at the end of the engine cold start test may include:
when the engine fails to start continuously for three times, ending the cold start test of the engine, and recording the actual cycle number of the engine before the first start failure, wherein the actual cycle number is the successful start number of the engine;
or when the cycle number of the engine reaches the set cycle number, ending the cold start test of the engine, wherein the set cycle number is the successful number of the running of the engine.
Compared with the traditional cold start test method with the whole vehicle as a test object, the cold start test method of the engine provided by the embodiment of the application controls the single engine to run under the same working condition in a low-temperature environment according to the engine speed, the engine load and the duration time under the working condition of the whole vehicle, and circulates the running and flameout processes of the engine to perform repeated cold start tests, can evaluate the cold start performance of the vehicle in advance, and reduces the development period and difficulty of low-temperature repeated cold start of the whole vehicle.
FIG. 3 is a schematic flow chart illustrating another engine cold start test method provided by an embodiment of the present application. As shown in fig. 3, the engine cold start test method includes:
s301, cooling the whole vehicle for a first set time at a set temperature.
In the embodiment of the application, the whole vehicle is firstly required to be placed in a low-temperature environment for a period of time so as to obtain the working condition parameters of the whole vehicle in the cold start environment. The set temperature and the first set time can be selected by a tester independently or according to the test requirements of the cold start test, so that the temperatures of all parts of the whole vehicle are basically consistent and the requirements of the cold start test are met.
For example, the set temperature may be-20 ℃, and the first set time may be 8 hours or more.
In some embodiments of the present application, this step may be performed prior to each cold start test. Or, the working condition of the whole vehicle and the corresponding working condition parameters at the set temperature can be recorded and stored as a historical record. When a cold start test is required, the working condition parameters of the whole vehicle in the cold start environment can be directly obtained from the historical records.
And S302, acquiring the engine speed, the engine load and the duration under the working condition of the whole vehicle.
In the embodiment of the application, the selected and obtained working condition parameters are engine speed, engine load and duration. Based on the working condition parameters, the engine can be controlled to run through a control console in the engine cold start test system.
Alternatively, the vehicle operating condition may include at least one of an idle operating condition, a steady-state driving operating condition, an acceleration operating condition, a deceleration operating condition, and a rapid acceleration operating condition.
The cold start test mode of the engine provided by the embodiment of the application can not only carry out the cold start test on the whole engine, but also can realize the cold start test on parts in the engine. For cold start tests of different test objects, the whole vehicle working condition of the working condition parameters to be acquired can be determined according to the correlation between the test objects and the whole vehicle working condition.
In some embodiments of the present application, a correspondence between the test object and the entire vehicle operating condition may be preset, and the entire vehicle operating condition to be tested may be determined based on the correspondence. Furthermore, the working condition of the whole vehicle at the set temperature can form a corresponding relation with working condition parameters such as the engine speed, the engine load, the duration and the like. Namely, the corresponding relation between the test object and the whole vehicle working condition, the set temperature and the working condition parameters is predetermined. And determining the engine speed, the engine load and the duration of the current test object under different working conditions of the whole vehicle at the set temperature based on the corresponding relation.
The test object can be parts of an engine, a spark plug in the engine, a gearbox in the engine and the like. For example, when performing a cold start test on a spark plug in an engine, a steady state driving condition, an acceleration or deceleration condition, and a rapid acceleration condition may be selected. When a cold start test is carried out on a gearbox in the engine or the whole engine, the idle working condition, the steady-state running working condition, the acceleration working condition, the deceleration working condition and the rapid acceleration working condition can be tested to obtain relevant working condition parameters.
In some embodiments of the present application, the idle condition, the steady-state driving condition, the acceleration condition, the deceleration condition, and the rapid acceleration condition of the entire vehicle may be determined according to a manner known to those skilled in the art, and the engine speed, the engine load, and the duration under the entire vehicle condition may also be obtained by a control system in the vehicle through a common sensor, which is not limited in this embodiment of the present application.
Illustratively, the idling condition refers to a no-load running state of an engine, the steady-state running condition refers to a constant-speed state of a vehicle, the rapid acceleration condition refers to a condition that an accelerator pedal is opened to the maximum degree in a short time, the acceleration condition refers to a condition that the accelerator pedal is opened to a certain degree in a certain time, and the deceleration condition refers to a braking action in the vehicle or a condition that the opening degree of the accelerator pedal is reduced in a certain time.
The method can enter a steady-state running working condition when the rapid acceleration working condition, the acceleration working condition and the deceleration working condition are finished, and can enter an idling working condition or an acceleration working condition, a deceleration working condition and the like when the steady-state running working condition is finished. The duration of each condition may therefore be determined based on the start time for entering each condition and the end time for the end of each condition.
And S303, enabling the engine and the whole vehicle to be in the same test condition.
In the embodiment of the application, before the engine is controlled to run according to the working condition parameters of the whole vehicle working condition, the engine needs to be arranged under the test condition the same as that of the whole vehicle, so that the cold start test performed on the independent engine can be accurately simulated, and the test error is reduced.
Illustratively, the engine is cooled at a set temperature, which may be-20 ℃ for a first set time, which may be 8 hours or more. The set temperature and the first set time are the same as the test conditions of the whole vehicle.
Optionally, when a spark plug in the engine is used as a test object, the enabling the engine and the whole vehicle to be in the same test condition may further include: after the engine is fully heated, cooling the engine for a first set time at a set temperature; and replacing the spark plug in the engine, and cooling at the set temperature for a second set time.
Wherein, the engine is fully warmed up to avoid the influence of carbon deposition in a combustion chamber of the engine on a test result, and the second set time of cooling after the spark plug is replaced is to reduce the temperature of the spark plug after replacement to a set temperature. For example, the second set time may be 15 minutes.
And S304, controlling the engine to operate based on the engine speed and the engine load.
In the embodiment of the application, the running parameters in the engine can be set through a control console in the engine cold start test system, the running parameters of the engine are adjusted to be consistent with the engine speed and the engine load under the whole vehicle working condition, and the corresponding duration time of the running of the engine under the working condition is maintained.
It should be noted that, when the engine speed, the engine load and the duration under the entire vehicle operating condition are obtained, a plurality of entire vehicle operating conditions may be continuously tested. For example, after the steady-state driving condition, the vehicle is accelerated rapidly, enters the deceleration condition after entering the steady-state driving condition again, and finally enters the idling condition. Therefore, when the engine is controlled to operate based on the engine speed and the engine load, the occurrence sequence of all working conditions is consistent with the occurrence sequence of all working conditions in the whole vehicle in the operation process of the engine. In other words, when the working conditions of the whole vehicle comprise a plurality of working conditions, the sequence of the working conditions in the running process of the engine is the same as the sequence of the working conditions in the working conditions of the whole vehicle.
And S305, stopping the engine when the running time of the engine reaches the duration.
In the present embodiment, the engine is turned off for a third set time to allow the engine to re-cool to the set temperature in the test condition. Illustratively, the third set time may be 30 minutes.
And when the working conditions of the whole vehicle comprise a plurality of working conditions, the engine is flamed out for a third set time after completely repeating the plurality of working conditions in sequence, and the third set time is recorded as the completion of one test cycle.
Alternatively, when a spark plug in an engine is taken as a test object, the shunt resistance of the spark plug can be recorded after the engine is shut down. The shunt resistance can be tested by a shunt resistance tester or a megohmmeter, and the change condition of the shunt resistance can be used for reflecting the carbon deposition resistance of the spark plug. When the drop rate of the shunt resistance of the spark plug is fast, it is considered that the spark plug is weak in the carbon deposition resistance. In contrast, when the change speed of the shunt resistance of the spark plug is slow, it is considered that the spark plug is strong in the carbon deposition resistance.
And S306, judging whether the engine fails to start continuously for three times.
In the embodiment of the application, when the engine fails to start continuously for three times, the performance of the engine can be considered to be damaged, so that the cold start test is finished. In other embodiments of the present application, the cold start test may be ended when the engine fails to start.
When the engine does not reach three consecutive failed startups, step S307 described below is executed. When the engine fails to start three times continuously, step S308 described below is executed, in which the number of successful engine starts is the actual number of cycles before the engine fails to start for the first time.
And S307, judging whether the cycle number of the engine reaches the set cycle number.
In the embodiment of the present application, the cycle test to be performed in the cold start test may be set in advance, and may be 20 times, for example. When the engine fails to start continuously for three times and the cycle number reaches the set cycle test, the cold start performance of the engine can be considered to meet the test requirement, so that the cold start test is finished, and the successful start number of the engine is the set cycle number.
When the number of engine cycles reaches the set number of cycles, step S308 described below is executed. When the number of engine cycles has not reached the set number of engine cycles, the process returns to step S304.
And S308, finishing the cold start test of the engine and counting the successful start times of the engine.
In the embodiment of the application, the number of successful starting times of the engine can be increased by 1 at the end of each cycle of the engine. If the engine is not started, the number of successful engine starts is not increased. And after finishing the cold start test of the engine, calculating the superposition sum of the successful starting times of the engine to be used as a statistical value of the successful starting times of the engine.
Compared with the traditional cold start test method with the whole vehicle as a test object, the cold start test method of the engine provided by the embodiment of the application controls the single engine to run under the same working condition in a low-temperature environment according to the engine speed, the engine load and the duration time under the working condition of the whole vehicle, and circulates the running and flameout processes of the engine to perform repeated cold start tests, can evaluate the cold start performance of the vehicle in advance, and reduces the development period and difficulty of low-temperature repeated cold start of the whole vehicle.
The embodiment of the present application further provides an engine cold start test device 400, as shown in fig. 4, the device includes:
the acquisition module 401 is configured to acquire an engine speed, an engine load and a duration under a finished vehicle working condition;
an operation module 402 configured to control engine operation based on engine speed and engine load;
a shutdown module 403 configured to shutdown the engine after the operating time of the engine reaches a duration;
a cycling module 404 configured to cycle the engine operation and the engine shutdown process;
a statistics module 405 configured to count a number of successful starts of the engine at the end of the engine cold start test.
Alternatively, the vehicle operating condition may include at least one of an idle operating condition, a steady-state driving operating condition, an acceleration operating condition, a deceleration operating condition, and a rapid acceleration operating condition.
Optionally, the apparatus further comprises:
the condition module may be configured to subject the engine and the entire vehicle to the same test conditions.
Optionally, the loop module 404 may be further configured to perform the engine operation for the next loop after the engine stall has been sustained for a set time.
Optionally, the statistics module 405 may be further configured to:
when the engine fails to start continuously for three times, ending the cold start test of the engine, and recording the actual cycle number of the engine before the first start failure, wherein the actual cycle number is the successful start number of the engine;
or when the cycle number of the engine reaches the set cycle number, ending the cold start test of the engine, wherein the set cycle number is the successful number of the running of the engine.
The technical scheme provided by the embodiment of the application has the beneficial effects that at least:
compared with the traditional cold start test method using a whole vehicle as a test object, the cold start test method of the engine provided by the embodiment of the application controls the single engine to run under the same working condition in a low-temperature environment according to the engine speed, the engine load and the duration under the working condition of the whole vehicle, and circulates the running and flameout processes of the engine to carry out repeated cold start tests, can evaluate the cold start performance of the vehicle in advance, and reduces the development period and difficulty of low-temperature repeated cold start of the whole vehicle.
The embodiment of the application also provides an engine cold start test system, which at least comprises a control console and a low-temperature cabin. Wherein the console is coupled to the engine to be tested and is configured to:
acquiring the engine speed, the engine load and the duration under the working condition of the whole vehicle;
controlling engine operation based on engine speed and engine load;
when the running time of the engine reaches the duration, the engine is shut down;
cycling the engine on and engine off process;
and when the cold start test of the engine is finished, counting the successful starting times of the engine.
The engine is placed in a cold chamber configured to subject the engine and the vehicle to the same test conditions.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
It should be noted that: the engine cold start test device provided in the above embodiment is only exemplified by the division of the above functional modules, and in practical applications, the above functions may be distributed by different functional modules according to needs, that is, the internal structure of the device may be divided into different functional modules to complete all or part of the above described functions. In addition, the engine cold start test device provided by the above embodiment and the engine cold start test method embodiment belong to the same concept, and the specific implementation process is detailed in the method embodiment and is not described herein again.
In this application, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" means two or more unless expressly limited otherwise.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only.
It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (10)
1. An engine cold start test method, comprising:
acquiring the engine speed, the engine load and the duration under the working condition of the whole vehicle;
controlling engine operation based on the engine speed and the engine load;
shutting down the engine when the operating time of the engine reaches the duration;
cycling the engine on and the engine stall process;
and when the cold start test of the engine is finished, counting the successful starting times of the engine.
2. The method of claim 1, wherein the vehicle operating conditions include at least one of idle conditions, steady state driving conditions, acceleration conditions, deceleration conditions, and hard acceleration conditions.
3. The method of claim 1, wherein prior to controlling engine operation based on the engine speed and the engine load, further comprising:
and enabling the engine and the whole vehicle to be in the same test condition.
4. The method of claim 1, wherein the cycling the engine on and the engine off process comprises:
and after the engine is flamed out for a set time, carrying out the operation process of the engine of the next cycle.
5. The method of claim 1, wherein counting the number of successful starts of the engine at the end of the engine cold start test comprises:
when the engine fails to start continuously for three times, ending the cold start test of the engine, and recording the actual cycle number of the engine before the first start failure, wherein the actual cycle number is the successful start number of the engine;
or when the cycle number of the engine reaches a set cycle number, ending the cold start test of the engine, wherein the set cycle number is the successful number of the running of the engine.
6. An engine cold start test device, characterized in that the device comprises:
the acquisition module is configured to acquire the engine speed, the engine load and the duration under the working condition of the whole vehicle;
an operation module configured to control engine operation based on the engine speed and the engine load;
a shutdown module configured to shutdown the engine after the operating time of the engine reaches the duration;
a cycling module configured to cycle the engine operation and the engine shutdown process;
a counting module configured to count a number of successful starts of the engine at an end of the engine cold start test.
7. The apparatus of claim 6, wherein the vehicle operating conditions include at least one of idle, steady state, acceleration, deceleration, and rapid acceleration operating conditions.
8. The apparatus of claim 6, further comprising:
a condition module configured to subject the engine and the entire vehicle to the same test conditions.
9. The apparatus of claim 6,
the cycle module is further configured to perform the engine operation for a next cycle after the engine stall continues for a set time.
10. The apparatus of claim 6, wherein the statistics module is further configured to:
when the engine fails to start continuously for three times, ending the cold start test of the engine, and recording the actual cycle number of the engine before the first start failure, wherein the actual cycle number is the successful start number of the engine;
or when the cycle number of the engine reaches a set cycle number, ending the cold start test of the engine, wherein the set cycle number is the successful number of the running of the engine.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113358361A (en) * | 2021-06-23 | 2021-09-07 | 哈尔滨东安汽车动力股份有限公司 | Novel engine starting performance evaluation method |
| CN114216686A (en) * | 2021-12-17 | 2022-03-22 | 奇瑞汽车股份有限公司 | Automobile engine development test system |
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| CN114216686A (en) * | 2021-12-17 | 2022-03-22 | 奇瑞汽车股份有限公司 | Automobile engine development test system |
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