CN104729839A - Testing method and evaluating method for performance of hydraulic tappet - Google Patents
Testing method and evaluating method for performance of hydraulic tappet Download PDFInfo
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Abstract
The invention provides a testing method for performance of a hydraulic tappet. The method includes the following steps that S1, the hydraulic tappet is assembled on an engine; S2, the engine is subjected to running-in; S3, the engine operates at a high idle speed for a first preset time and then operates at an idle speed, and whether noise of the hydraulic tappet is normal is judged; S4, the engine is shut down for a second preset time; S5, the engine operates at the high idle speed for a third preset time and then is shut down for a fourth preset time; S6, every a fifth preset time, the engine is started to operate at the idle speed for a sixth preset time, and noise is recorded every time the hydraulic tappet operates at the idle speed in the sixth preset time. According to the testing method for the performance of the hydraulic tappet, by analyzing and recording the noise of the hydraulic tappet, whether the nose of the hydraulic tappet assembled on the engine is normal can be obtained, the design of the hydraulic tappet can be adjusted in the early stage of a project after an anomaly is found, and follow-up development and a reliability test will not be affected.
Description
Technical field
The present invention relates to the parts performance test technical field of engine valve actuating mechanism, particularly relate to a kind of hydraulic tappet method for testing performance and hydraulic tappet method of evaluating performance.
Background technology
Hydraulic tappet belongs to an important spare part in engine valve actuating mechanism, its Main Function uses the oil pressure of hydraulic oil (being generally engine motor oil) to carry out valve gap adjustment, valve clearance is eliminated rapidly, the noise that during reduction engine running, valve clearance is brought and vibration after making engine start.
At present, the performance test of hydraulic tappet is mainly by hydraulic tappet settling time tester, this tester is mainly used in the performance requirement of hydraulic tappet supplier to hydraulic tappet itself and detects, and the noise of the valve actuating mechanism after needing the hydraulic tappet paid close attention to coordinate with concrete engine for main engine factory there is no investigation.
Further, the existing noise to engine valve actuating mechanism is studied, and is only confined to the research to valve motion noise, does not relate to hydraulic tappet noise category.
Summary of the invention
Technical matters to be solved by this invention be for existing hydraulic tappet method for testing performance do not consider hydraulic tappet coordinate with engine after the defect of hydraulic tappet noise problem, a kind of hydraulic tappet method for testing performance is provided.
Embodiments provide a kind of hydraulic tappet method for testing performance for solving the problems of the technologies described above, described method comprises:
S1, to be tested one group of hydraulic tappet is assembled to engine;
S2, break-in is carried out to engine;
S3, high idle speed of piloting engine operate after the first Preset Time and fall back idle running, judge that whether hydraulic tappet noise is now normal, if there is extraordinary noise, then again change one group of hydraulic tappet and test; If noise is normal, then enter next step;
The second Preset Time shut down by S4, engine;
The 4th Preset Time is shut down after S5, high idle speed of piloting engine running the 3rd Preset Time;
S6, to pilot engine idle running the 6th Preset Time every the 5th Preset Time, record the noise of hydraulic tappet idle running in described 6th Preset Time each time.
Further, described first Preset Time is 1 ~ 2 hour.
Further, described second Preset Time is more than or equal to 12 hours.
Further, described 3rd Preset Time, the 4th Preset Time and the 5th Preset Time are 1 hour.
Further, described 6th Preset Time is 10 ~ 30 seconds.
Further, in step S2, the break-in of engine is carried out according to car load break-in operating mode or engine pedestal break-in operating mode.
Further, to pilot engine in step S6 idle running 20 times.
Further, also step is comprised after step S6:
S7, repetition step S4 ~ S6 at least twice.
Further, hydraulic tappet to be tested has two groups, and wherein one group of hydraulic tappet has the maximum settling time, and another group hydraulic tappet has the minimum settling time.
Present invention also offers a kind of hydraulic tappet method of evaluating performance, described method comprises:
S1, to be tested one group of hydraulic tappet is assembled to engine.
S2, break-in is carried out to engine.
S3, high idle speed of piloting engine operate after the first Preset Time and fall back idle running, judge that whether hydraulic tappet noise is now normal, if there is extraordinary noise, then again change one group of hydraulic tappet and test; If noise is normal, then enter next step.
The second Preset Time shut down by S4, engine.
The 4th Preset Time is shut down after S5, high idle speed of piloting engine running the 3rd Preset Time.
S6, to pilot engine idle running the 6th Preset Time every the 5th Preset Time, record the noise of hydraulic tappet idle running in described 6th Preset Time each time, and the noise of all number of times of record is classified as one group.
Occur the number of times of noise exception in this group noise of this group hydraulic tappet that S7, judgement obtain, if occur in this group noise of this group hydraulic tappet, a noise is abnormal, then the performance evaluation of this group hydraulic tappet is defective; Otherwise if do not occur in this group noise of this group hydraulic tappet, noise is abnormal, then the performance evaluation of this group hydraulic tappet is qualified.
In addition, present invention also offers another kind of hydraulic tappet method of evaluating performance, described method comprises:
S1, to be tested one group of hydraulic tappet is assembled to engine;
S2, break-in is carried out to engine;
S3, high idle speed of piloting engine operate after the first Preset Time and fall back idle running, judge that whether hydraulic tappet noise is now normal, if there is extraordinary noise, then again change one group of hydraulic tappet and test; If noise is normal, then enter next step;
The second Preset Time shut down by S4, engine;
The 4th Preset Time is shut down after S5, high idle speed of piloting engine running the 3rd Preset Time;
S6, to pilot engine idle running the 6th Preset Time every the 5th Preset Time, record the noise of hydraulic tappet idle running in described 6th Preset Time each time, and the noise of all number of times of record is classified as one group;
S7, repetition step S4 ~ S6 at least twice, to obtain many groups noise of this group hydraulic tappet;
Occur the number of times of the group of noise exception in many groups noise of this group hydraulic tappet that S8, judgement obtain, if occur in many groups noise of this group hydraulic tappet, the group of noise exception is at least one times minority, then the performance evaluation of this group hydraulic tappet is qualified; Otherwise if occur in many groups noise of this group hydraulic tappet, the group of noise exception is at least one times for most, then the performance evaluation of this group hydraulic tappet is defective.
According to hydraulic tappet method for testing performance of the present invention, the noise of hydraulic tappet idle running in described 6th Preset Time each time can be recorded, like this by the noise of the hydraulic tappet of analytic record, whether the noise that can obtain this group hydraulic tappet after being assembled to engine is abnormal, just can adjust the design of hydraulic tappet in early days in project after noting abnormalities, subsequent development and fail-test can not be had influence on, avoid the engine valve actuating mechanism after the testing machine in fail-test stage in later stage and volume production to damage.
In addition, according to the extraordinary noise that hydraulic tappet occurs, hydraulic pressure charge oil pressure size in operating after can checking settling time of hydraulic tappet and hydraulic tappet and Engine Matching in addition, with this verify the settling time of hydraulic tappet arrange whether rationally and in operating after hydraulic tappet and Engine Matching hydraulic pressure charge oil pressure whether meet the demands.
Accompanying drawing explanation
Fig. 1 is the process flow diagram of the hydraulic tappet method for testing performance that one embodiment of the invention provides;
Fig. 2 is the process flow diagram of the hydraulic tappet method for testing performance that another embodiment of the present invention provides.
Embodiment
In order to make technical matters solved by the invention, technical scheme and beneficial effect clearly understand, below in conjunction with drawings and Examples, the present invention is described in further detail.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
As shown in Figure 1, the hydraulic tappet method for testing performance that one embodiment of the invention provides, comprising:
S1, to be tested one group of hydraulic tappet is assembled to engine; Preferably, hydraulic tappet to be tested has two groups, and wherein one group of hydraulic tappet has the maximum settling time, and another group hydraulic tappet has the minimum settling time.Like this, two groups of hydraulic tappets of test cover maximal value and the minimum value of settling time, as long as these two groups of hydraulic tappet checkings are qualified, the hydraulic tappet of other settling time of same design is also inevitable qualified.
S2, according to car load break-in operating mode or engine pedestal break-in operating mode, break-in is carried out to engine.If carry out break-in according to car load break-in operating mode to engine, then need in advance by engine assembly to car load.
After S3, engine break-in complete, high idle speed of piloting engine running fell back idle running after 1 ~ 2 hour, judged that whether hydraulic tappet noise is now normal, if there is extraordinary noise, then again changed one group of hydraulic tappet and test; If noise is normal, then enter next step.
S4, engine are shut down at least 12 hours.Because the oil pressure of engine operationally hydraulic tappet is full (when engine does not work; hydraulic tappet draining); therefore; shut down herein and within 12 hours, be draining 12 hours; like this; can simulate the real work situation (car owner stop evening time be generally all more than or equal to 12 hours) of hydraulic tappet, deflection is true more to make test.
Shut down 1 hour after S5, high idle speed of piloting engine operate 1 hour.
S6, shut down after 1 hour, the idle running 10 ~ 30 seconds of piloting engine every 1 hour, record the noise of hydraulic tappet idle running in 10 ~ 30 seconds each time, the noise of all number of times of step S6 record is classified as one group.The number of times of idle running of piloting engine in this step can be 20 times, namely records the noise 20 times of hydraulic tappet.Due to the impact of draining factor, engine can only start once for 1 hour, and thus in the present embodiment, described 5th Preset Time is 1 hour, and namely in step S6, engine often starts once, need shut down 1 hour.Because car owner is normally stopped a period of time every a break time, therefore shutting down and start once for 1 hour, is also the real work situation in order to make the test of hydraulic tappet more be partial to hydraulic tappet.
In the embodiment shown in fig. 1, step S6 only carries out once, when the noise analysis in later stage, if occur in this group noise of this group hydraulic tappet, a noise is abnormal, then the test evaluation of this group hydraulic tappet is not by (namely the performance evaluation of this group hydraulic tappet is defective); Otherwise if do not occur in this group noise of this group hydraulic tappet, noise is abnormal, then the test evaluation of this group hydraulic tappet is by (namely the performance evaluation of this group hydraulic tappet is qualified).
Hydraulic tappet method for testing performance according to the above embodiment of the present invention, the noise of hydraulic tappet idle running in described 6th Preset Time each time can be recorded, like this by the noise of many groups hydraulic tappet of analytic record, whether the noise that can obtain this group hydraulic tappet after being assembled to engine is abnormal, just can adjust the design of hydraulic tappet in early days in project after noting abnormalities, subsequent development and fail-test can not be had influence on, avoid the engine valve actuating mechanism after the testing machine in fail-test stage in later stage and volume production to damage.In addition, according to the extraordinary noise that hydraulic tappet occurs, hydraulic pressure charge oil pressure size in operating after can checking settling time of hydraulic tappet and hydraulic tappet and Engine Matching in addition, with this verify the settling time of hydraulic tappet arrange whether rationally and in operating after hydraulic tappet and Engine Matching hydraulic pressure charge oil pressure whether meet the demands.
As shown in Figure 2, the hydraulic tappet method for testing performance that another embodiment of the present invention provides, comprising:
S1, to be tested one group of hydraulic tappet is assembled to engine; Preferably, hydraulic tappet to be tested has two groups, and wherein one group of hydraulic tappet has the maximum settling time, and another group hydraulic tappet has the minimum settling time.Like this, two groups of hydraulic tappets of test cover maximal value and the minimum value of settling time, as long as these two groups of hydraulic tappet checkings are qualified, the hydraulic tappet of other settling time of same design is also inevitable qualified.
S2, according to car load break-in operating mode or engine pedestal break-in operating mode, break-in is carried out to engine.If carry out break-in according to car load break-in operating mode to engine, then need in advance by engine assembly to car load.
After S3, engine break-in complete, high idle speed of piloting engine running fell back idle running after 1 ~ 2 hour, judged that whether hydraulic tappet noise is now normal, if there is extraordinary noise, then again changed one group of hydraulic tappet and test; If noise is normal, then enter next step.
S4, engine are shut down at least 12 hours.
Shut down 1 hour after S5, high idle speed of piloting engine operate 1 hour.
S6, to shut down after 1 hour; to pilot engine every 1 hour idle running 10 ~ 30 seconds; record the noise of hydraulic tappet idle running in 10 ~ 30 seconds each time; the noise of all number of times of step S6 record is classified as one group; if occur in one group of noise, a noise is abnormal, then think that this group noise is defective.In addition, due to the impact of draining factor, engine can only start once for 1 hour, and thus in the present embodiment, described 5th Preset Time is 1 hour, and namely in step S6, engine often starts once, need shut down 1 hour.
S7, repetition step S4 ~ S6 preset times (at least twice).It can be such as four times.Like this, step S4 ~ S6 has carried out 5 times, altogether obtains five groups of noises of hydraulic tappet.
In the embodiment shown in Figure 2, step S4 ~ S6 to carry out repeatedly, and then obtain many groups noise of same group of hydraulic tappet, when the noise analysis in later stage, if occur in many groups noise of this group hydraulic tappet, the group of noise exception is at least one times minority, then the test evaluation of this group hydraulic tappet is by (namely the performance evaluation of this group hydraulic tappet is qualified); Otherwise, if the group occurring noise exception at least one times in many groups noise of this group hydraulic tappet is for most, then this group hydraulic tappet test evaluation be not by (namely the performance evaluation of this group hydraulic tappet is defective).Such as, step S4 ~ S6 has carried out five times, and then obtain five groups of noises of same group of hydraulic tappet, when the noise analysis in later stage, if occur in many groups noise of this group hydraulic tappet, the group of noise exception is at least one times minority (being namely less than or equal to two groups), then the test evaluation of this group hydraulic tappet is by (namely the performance evaluation of this group hydraulic tappet is qualified); Otherwise if occur in many groups noise of this group hydraulic tappet, the group of noise exception is at least one times for most, and (being namely more than or equal to three groups), then testing of this group hydraulic tappet examination is evaluated as not by (namely the performance evaluation of this group hydraulic tappet is defective).
The present embodiment is compared with embodiment illustrated in fig. 1, more loose when evaluating hydraulic tappet test and whether passing through, the experiment abberation that some other factorses cause can be avoided like this, namely the noise of hydraulic tappet is abnormal is not likely that hydraulic tappet itself brings, but causes due to other external factors such as environment temperatures.
In addition, one embodiment of the invention additionally provides a kind of hydraulic tappet method of evaluating performance, and described method comprises:
S1, to be tested one group of hydraulic tappet is assembled to engine.
S2, break-in is carried out to engine.
S3, high idle speed of piloting engine operate after the first Preset Time and fall back idle running, judge that whether hydraulic tappet noise is now normal, if there is extraordinary noise, then again change one group of hydraulic tappet and test; If noise is normal, then enter next step.
The second Preset Time shut down by S4, engine.
The 4th Preset Time is shut down after S5, high idle speed of piloting engine running the 3rd Preset Time.
S6, to pilot engine idle running the 6th Preset Time every the 5th Preset Time, record the noise of hydraulic tappet idle running in described 6th Preset Time each time, and the noise of all number of times of record is classified as one group.
Occur the number of times of noise exception in this group noise of this group hydraulic tappet that S7, judgement obtain, if occur in this group noise of this group hydraulic tappet, a noise is abnormal, then the performance evaluation of this group hydraulic tappet is defective; Otherwise if do not occur in this group noise of this group hydraulic tappet, noise is abnormal, then the performance evaluation of this group hydraulic tappet is qualified.
In addition, another embodiment of the present invention additionally provides a kind of hydraulic tappet method of evaluating performance, and described method comprises:
S1, to be tested one group of hydraulic tappet is assembled to engine;
S2, break-in is carried out to engine;
S3, high idle speed of piloting engine operate after the first Preset Time and fall back idle running, judge that whether hydraulic tappet noise is now normal, if there is extraordinary noise, then again change one group of hydraulic tappet and test; If noise is normal, then enter next step;
The second Preset Time shut down by S4, engine;
The 4th Preset Time is shut down after S5, high idle speed of piloting engine running the 3rd Preset Time;
S6, to pilot engine idle running the 6th Preset Time every the 5th Preset Time, record the noise of hydraulic tappet idle running in described 6th Preset Time each time, and the noise of all number of times of record is classified as one group;
S7, repetition step S4 ~ S6 at least twice, to obtain many groups noise of this group hydraulic tappet;
Occur the number of times of the group of noise exception in many groups noise of this group hydraulic tappet that S8, judgement obtain, if occur in many groups noise of this group hydraulic tappet, the group of noise exception is at least one times minority, then the performance evaluation of this group hydraulic tappet is qualified; Otherwise if occur in many groups noise of this group hydraulic tappet, the group of noise exception is at least one times for most, then the performance evaluation of this group hydraulic tappet is defective.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a hydraulic tappet method for testing performance, is characterized in that, described method comprises:
S1, to be tested one group of hydraulic tappet is assembled to engine;
S2, break-in is carried out to engine;
S3, high idle speed of piloting engine operate after the first Preset Time and fall back idle running, judge that whether hydraulic tappet noise is now normal, if there is extraordinary noise, then again change one group of hydraulic tappet and test; If noise is normal, then enter next step;
The second Preset Time shut down by S4, engine;
The 4th Preset Time is shut down after S5, high idle speed of piloting engine running the 3rd Preset Time;
S6, to pilot engine idle running the 6th Preset Time every the 5th Preset Time, record the noise of hydraulic tappet idle running in described 6th Preset Time each time.
2. hydraulic tappet method for testing performance according to claim 1, is characterized in that, described first Preset Time is 1 ~ 2 hour.
3. hydraulic tappet method for testing performance according to claim 1, is characterized in that, described second Preset Time is more than or equal to 12 hours.
4. hydraulic tappet method for testing performance according to claim 1, is characterized in that, described 3rd Preset Time, the 4th Preset Time and the 5th Preset Time are 1 hour, and described 6th Preset Time is 10 ~ 30 seconds.
5. hydraulic tappet method for testing performance according to claim 1, is characterized in that, carries out in step S2 to the break-in of engine according to car load break-in operating mode or engine pedestal break-in operating mode.
6. hydraulic tappet method for testing performance according to claim 1, is characterized in that, the idle running 20 times of piloting engine in step S6.
7. hydraulic tappet method for testing performance according to claim 1, is characterized in that, also comprise step after step S6:
S7, repetition step S4 ~ S6 at least twice.
8. the hydraulic tappet method for testing performance according to claim 1 to 7 any one, is characterized in that, hydraulic tappet to be tested has two groups, and wherein one group of hydraulic tappet has the maximum settling time, and another group hydraulic tappet has the minimum settling time.
9. a hydraulic tappet method of evaluating performance, is characterized in that, described method comprises:
S1, to be tested one group of hydraulic tappet is assembled to engine;
S2, break-in is carried out to engine;
S3, high idle speed of piloting engine operate after the first Preset Time and fall back idle running, judge that whether hydraulic tappet noise is now normal, if there is extraordinary noise, then again change one group of hydraulic tappet and test; If noise is normal, then enter next step;
The second Preset Time shut down by S4, engine;
The 4th Preset Time is shut down after S5, high idle speed of piloting engine running the 3rd Preset Time;
S6, to pilot engine idle running the 6th Preset Time every the 5th Preset Time, record the noise of hydraulic tappet idle running in described 6th Preset Time each time, and the noise of all number of times of record is classified as one group;
Occur the number of times of noise exception in this group noise of this group hydraulic tappet that S7, judgement obtain, if occur in this group noise of this group hydraulic tappet, a noise is abnormal, then the performance evaluation of this group hydraulic tappet is defective; Otherwise if do not occur in this group noise of this group hydraulic tappet, noise is abnormal, then the performance evaluation of this group hydraulic tappet is qualified.
10. a hydraulic tappet method of evaluating performance, is characterized in that, described method comprises:
S1, to be tested one group of hydraulic tappet is assembled to engine;
S2, break-in is carried out to engine;
S3, high idle speed of piloting engine operate after the first Preset Time and fall back idle running, judge that whether hydraulic tappet noise is now normal, if there is extraordinary noise, then again change one group of hydraulic tappet and test; If noise is normal, then enter next step;
The second Preset Time shut down by S4, engine;
The 4th Preset Time is shut down after S5, high idle speed of piloting engine running the 3rd Preset Time;
S6, to pilot engine idle running the 6th Preset Time every the 5th Preset Time, record the noise of hydraulic tappet idle running in described 6th Preset Time each time, and the noise of all number of times of record is classified as one group;
S7, repetition step S4 ~ S6 at least twice, to obtain many groups noise of this group hydraulic tappet;
Occur the number of times of the group of noise exception in many groups noise of this group hydraulic tappet that S8, judgement obtain, if occur in many groups noise of this group hydraulic tappet, the group of noise exception is at least one times minority, then the performance evaluation of this group hydraulic tappet is qualified; Otherwise if occur in many groups noise of this group hydraulic tappet, the group of noise exception is at least one times for most, then the performance evaluation of this group hydraulic tappet is defective.
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