CN115434840B - Method, device and storage medium for interventional identification of engine oil pumping time - Google Patents
Method, device and storage medium for interventional identification of engine oil pumping time Download PDFInfo
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- CN115434840B CN115434840B CN202211190126.0A CN202211190126A CN115434840B CN 115434840 B CN115434840 B CN 115434840B CN 202211190126 A CN202211190126 A CN 202211190126A CN 115434840 B CN115434840 B CN 115434840B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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Abstract
The application relates to a method, a device and a storage medium for identifying engine oil pumping time in an intervention mode. It comprises the following steps: determining that the engine enters a waiting over run working condition; for an engine entering a waiting over run working condition, when the engine is determined to meet an intervention identification condition under the waiting over run working condition, configuring an intervention set rail pressure; and determining a pumping tooth number meeting pumping characteristics under the working cycle of the engine based on the current rail pressure state of the working teeth corresponding to all the working teeth under the working cycle of the engine so as to utilize the pumping tooth number to represent the pumping moment of the oil pump, wherein the pumping tooth number is the number of the working tooth meeting the pumping characteristics under the working cycle of the engine. The application can effectively identify the oil pumping time of the engine, and has high identification precision, safety and reliability.
Description
Technical Field
The application relates to a method, a device and a storage medium, in particular to a method, a device and a storage medium for identifying engine oil pumping time in an intervention mode.
Background
Currently, in the installation of diesel engines, the installation position of an oil pump is not fixed in most cases. Any engine can cause the difference of the oil pumping relative to the oil injection time due to the difference of the installation positions of the oil pumps.
For high pressure common rail fuel systems, rail pressure fluctuations have a number of influencing factors, two of which are pumping and injection, and for manufacturers desiring to optimize rail pressure fluctuations, the first difficulty to overcome is to determine the timing of pumping of each engine itself, which is often difficult. Therefore, how to effectively identify the oil pumping time of the engine is a technical problem which needs to be solved urgently at present.
Disclosure of Invention
The application aims to overcome the defects in the prior art and provides a method, a device and a storage medium for identifying the oil pumping moment of an engine in an intervening way, which can effectively identify the oil pumping moment of the engine, and are high in identification precision, safe and reliable.
According to the technical scheme provided by the application, the method for identifying the oil pumping time of the engine in an intervention way comprises the following steps:
determining that the engine enters a waiting over run working condition;
for an engine entering a waiting over run working condition, when the engine is determined to meet an intervention identification condition under the waiting over run working condition, configuring an intervention setting rail pressure so that the engine pumps oil based on the intervention setting rail pressure;
collecting the current rail pressure of the disk teeth corresponding to each signal disk tooth on a crankshaft signal disk for an engine working cycle based on the intervening set rail pressure so as to obtain the current rail pressure state of the working teeth of the corresponding working teeth based on the collected current rail pressure of the disk teeth;
and determining a pumping tooth number meeting pumping characteristics under the working cycle of the engine based on the current rail pressure state of the working teeth corresponding to all the working teeth under the working cycle of the engine so as to utilize the pumping tooth number to represent the pumping moment of the oil pump, wherein the pumping tooth number is the number of the working tooth meeting the pumping characteristics under the working cycle of the engine.
And when the intervention recognition condition is met under the waiting over run working condition, the intervention recognition condition is met, wherein the intervention recognition condition comprises that the engine is under the waiting over run working condition, the current rail pressure corresponding to the current signal panel tooth is smaller than a calibrated safe rail pressure threshold value, the engine oil pumping moment is not recognized, and the engine is not affected by the intervention recognition fault currently.
When the intervention setting rail pressure is configured, the following steps are: p (P) Int ＝P 0 +P δ Wherein, the method comprises the steps of, wherein,
P Int setting rail pressure for intervention, P 0 To preset the current rail pressure, P δ Is rail pressure deviation.
For an engine, the crankshaft signal panel rotates for two circles to obtain the current rail pressure of working teeth corresponding to 120 working teeth according to 60 signal panel teeth on the crankshaft signal panel, wherein the number of the 120 working teeth is 0-119;
when determining the pumping tooth number meeting the pumping characteristic based on the current rail pressures of the working teeth corresponding to 120 working teeth, comparing the current rail pressure of one working tooth with the current rail pressure of the previous working tooth of the current rail pressure of the working tooth according to the serial changing sequence of the serial numbers of the working teeth to obtain a current rail pressure difference value of the working tooth after comparison, and counting according to the states of the current rail pressure difference values of two continuous corresponding working teeth;
when the count value is greater than the rail pressure count threshold and the count value reaches a peak value, the number of the working tooth is locked to serve as the pumping tooth number.
When counting according to the state of the current rail pressure difference value of the two continuous corresponding working teeth, when the current rail pressure difference value of the two continuous working teeth is larger than 0, accumulating the current count value by 1;
and when the current rail pressure difference value of two continuous working teeth is smaller than 0, the current count value is reduced by 1, otherwise, the current count value is cleared.
The number of pumping teeth N is also counted at an engine duty cycle when determining the pumping teeth number.
The method also comprises the step of checking the oil pumping moment;
when the oil pumping moment is checked, N oil pumping tooth numbers are arranged according to the sequence of the number sizes, so that the difference value of the corresponding numbers of the two adjacent oil pumping tooth numbers is calculated; when all the number differences meet the check at equal intervals, the determined pumping tooth numbers and the number N of the pumping tooth numbers pass the check.
And after the verification is passed, storing the determined pump oil tooth number.
An apparatus for intrusively identifying the oil pumping time of an engine, comprising
The position sensor is used for acquiring the position state of the signal disc teeth on the crankshaft signal disc;
the rail pressure sensor is used for collecting the current rail pressure of the disk teeth corresponding to the signal disk teeth;
the identifying controller is used for identifying and determining that the engine enters a waiting over run working condition, and configuring an intervention setting rail pressure when the intervention identifying condition is met under the waiting over run working condition so as to control the engine to pump oil based on the intervention setting rail pressure;
for an engine working cycle based on intervention setting rail pressure, the recognition controller collects the position state of a signal disc tooth obtained by a crankshaft position sensor and the current rail pressure of the disc tooth obtained by a rail pressure sensor to generate corresponding working teeth and the current rail pressure state of the working teeth corresponding to the working teeth;
based on the current rail pressure state of the working teeth corresponding to all the working teeth under the working cycle of the engine, the identification controller determines the pumping tooth number meeting the pumping characteristic under the working cycle of the engine so as to utilize the pumping tooth number to represent the pumping moment of the oil pump, wherein the pumping tooth number is the number of the working tooth meeting the pumping characteristic under the working cycle of the engine.
A storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the method described above.
The application has the advantages that: after the engine enters a waiting over run working condition, configuring an intervention setting rail pressure, controlling the engine to pump oil under the intervention setting rail pressure, and performing working circulation on the engine under the intervention setting rail pressure so as to obtain a working tooth current rail pressure state of a corresponding working tooth based on the acquired disc tooth current rail pressure; and determining the pumping oil tooth number meeting the pumping oil characteristic under the working cycle of the engine based on the current rail pressure state of the working teeth corresponding to all the working teeth under the working cycle of the engine so as to utilize the pumping oil tooth number to represent the pumping oil moment of the oil pump, namely, the pumping oil moment of the engine can be effectively identified, and the identification precision is high, safe and reliable.
Drawings
Fig. 1 is a flow chart of the operation of the present application.
FIG. 2 is a diagram of the present application for determining the number of pumping teeth and the number of pumping teeth based on count statistics.
Fig. 3 is a schematic diagram of the present application for checking the oil pumping time.
Fig. 4 is a block diagram showing the structure of the identification device of the present application.
Detailed Description
The application will be further described with reference to the following specific drawings and examples.
As shown in fig. 1: in order to effectively identify the engine oil pumping moment, the method for identifying the engine oil pumping moment in an intervention mode comprises the following steps:
determining that the engine enters a waiting over run working condition;
for an engine entering a waiting over run working condition, when the engine is determined to meet an intervention identification condition under the waiting over run working condition, configuring an intervention setting rail pressure so that the engine pumps oil based on the intervention setting rail pressure;
collecting the current rail pressure of the disk teeth corresponding to each signal disk tooth on a crankshaft signal disk for an engine working cycle based on the intervening set rail pressure so as to obtain the current rail pressure state of the working teeth of the corresponding working teeth based on the collected current rail pressure of the disk teeth;
and determining a pumping tooth number meeting pumping characteristics under the working cycle of the engine based on the current rail pressure state of the working teeth corresponding to all the working teeth under the working cycle of the engine so as to utilize the pumping tooth number to represent the pumping moment of the oil pump, wherein the pumping tooth number is the number of the working tooth meeting the pumping characteristics under the working cycle of the engine.
In one embodiment of the application, when the engine is in the throttle release state, the engine can be determined to enter a waiting over run working condition; when the engine enters the working condition waiting for the over run, the oil injection can be stopped, but the oil pump can pump the oil normally, and under the working condition waiting for the over run, the oil pump and the oil injection can be prevented from being overlapped together, the possible interference generated by the identification is avoided, and the reliability and the accuracy of the identification on the oil pump moment are improved. Therefore, when the waiting over run condition is not entered, the detection state is required to be cycled until the engine enters the waiting over run condition. In specific implementation, the method can detect whether the engine enters the over run working condition by adopting the technical means commonly used in the technical field, specifically determine the mode and the process of the engine entering the over run working condition, and select the mode and the process according to actual needs, so that the requirements of actual application can be met.
After the engine enters the waiting over run working condition, in order to improve the accuracy of identification, the detection of the intervention identification condition is needed, namely, the identification of the oil pumping moment is only carried out after the intervention identification condition is met and the intervention rail pressure configuration is carried out. After the intervention identification condition is met, the intervention setting rail pressure is configured, wherein the configured intervention setting rail pressure is generally larger than the preset current rail pressure. After the intervention setting rail pressure is configured, the control engine presses down the oil pump based on the intervention setting rail pressure, and at the moment, the accuracy and the reliability of oil pump moment identification can be improved.
The working cycle of the engine, namely the engine passes through a complete working process, at the moment, the cylinder in the engine completes the working, exhausting, air inlet and compressing processes, and the specific condition of the working cycle of the engine is consistent with the prior art. From the above description, it is seen that in one embodiment of the present application, an engine operating cycle is performed at the time of pumping, i.e., at the set rail pressure based on intervention.
Generally, a crankshaft signal disc is installed on a crankshaft of an engine, a plurality of signal disc teeth are arranged on the outer ring edge of the crankshaft signal disc, the signal disc teeth are generally uniformly distributed on the outer ring edge of the crankshaft signal disc, and the specific corresponding coordination relationship among the signal disc teeth, the crankshaft signal disc and the crankshaft of the engine is consistent with the prior art and is well known to the person skilled in the art.
When the crankshaft signal panel rotates along with the crankshaft of the engine, the position of the signal panel teeth on the crankshaft signal panel can be obtained by using a position sensor matched with the crankshaft signal panel, the current rail pressure corresponding to the current signal panel teeth can be obtained by using a rail pressure sensor, and the current rail pressure of the panel teeth corresponding to each signal panel tooth on the crankshaft signal panel can be collected. It is known in the art that under an engine duty cycle, the crankshaft signal plate rotates two turns following the engine crankshaft, and therefore, under an engine duty cycle, the number of working teeth is twice the number of signal plate teeth, where the signal plate teeth comprise missing teeth on the crankshaft signal plate. In the process that the crankshaft signal panel follows the rotation of the crankshaft, corresponding working teeth and current rail pressures of the working teeth can be respectively generated according to the current rail pressures of the signal panel teeth and the disk teeth.
In one embodiment of the application, the current rail pressure state of the working teeth corresponding to all the working teeth can be used for determining the pumping tooth number meeting the pumping characteristic under the working cycle of the engine; the characteristic of oil pumping is met, specifically that when oil pumping is performed, the current rail pressure of the working tooth rises and reaches a peak value, the current rail pressure of one working tooth is matched with the intervention set rail pressure, and then the current rail pressure of the working tooth is reduced compared with the intervention set rail pressure. The current rail pressure of the working tooth is matched with the intervention setting rail pressure, specifically, the current rail pressure of the working tooth is consistent with the intervention setting rail pressure, or the difference value between the current rail pressure of the working tooth and the intervention setting rail pressure is in an allowable difference value range, and the allowable difference value can be specifically selected according to the needs so as to meet the actual application scene requirements.
From the above description, determining the number of the pumping teeth satisfying the pumping characteristic is the number of the working teeth satisfying the pumping characteristic under the working cycle of the engine; in one embodiment of the application, the pumping tooth number is used for representing the pumping moment of the oil pump.
In one embodiment of the application, when the intervention identification condition is met under the waiting over run condition, the intervention identification condition is met, wherein the meeting of the intervention identification condition comprises that the engine is under the waiting over run condition, the current rail pressure corresponding to the current signal panel tooth is smaller than a calibrated safe rail pressure threshold value, the engine oil pumping moment is not identified, and the engine does not have a fault influencing the intervention identification currently.
Specifically, the specific case that the engine is in the waiting condition for the over run condition in the intervention identification condition may refer to the above description, and will not be repeated herein. The current rail pressure corresponding to the current signal panel teeth is smaller than a calibrated safe rail pressure threshold, namely, after the engine enters a waiting overload working condition, the current rail pressure of the panel teeth corresponding to each signal panel tooth is required to be compared with the calibrated safe rail pressure threshold, and if the current rail pressure of the panel teeth is larger than the calibrated safe rail pressure threshold, intervention recognition conditions are not met, and at the moment, the intervention recognition conditions are required to be re-detected and waited to be met. The specific condition of the calibrated safe rail pressure threshold value is consistent with the existing condition, and is particularly well known to the person skilled in the art.
The condition that the engine oil pumping time is not identified in the intervention identification condition specifically means that the identification of the oil pumping time is in a state after the oil pump is installed and the oil pump is unknown after the oil pump is installed, and when the engine oil pumping time is identified by the intervention engine oil pumping time identification method or is determined by other modes, the intervention engine oil pumping time identification method is stopped. In specific implementation, the identified engine oil pumping time is generally stored in the memory, so that the identification state of the engine oil pumping time can be determined by adopting a technical means commonly used in the technical field.
The engine does not have a fault influencing the intervention recognition at present, namely if the engine has a fault at present, the intervention recognition is not influenced, so that the reliability and the stability of the whole intervention recognition are ensured; such as the current existing faults of the engine cannot include faults of rail pressure sensors (which influence the acquisition of rail pressure and thus the identification strategy) and faults of oil metering units (which influence oil inlet and rail pressure control and thus the identification strategy).
In one embodiment of the present application, when the intervention set rail pressure is configured, there are: p (P) Int ＝P 0 +P δ Wherein P is Int Setting rail pressure for intervention, P 0 To preset the current rail pressure, P δ Is rail pressure deviation. In specific implementation, the current rail pressure P is preset 0 I.e. the rail pressure under normal condition, presetting the current rail pressure P 0 Is consistent with the prior art. Deviation of rail pressure P δ Is greater than 0 and less than the preset current rail pressure P 0 The rail pressure value of (2) can be specifically selected according to actual needs so as to meet the requirement of identifying the oil pumping moment.
In one embodiment of the application, for an engine duty cycle, the crankshaft signal plate rotates two turns to obtain the current rail pressure of the working teeth corresponding to 120 working teeth according to 60 signal plate teeth on the crankshaft signal plate, wherein the number of the 120 working teeth is 0-119;
when determining the pumping tooth number meeting the pumping characteristic based on the current rail pressures of the working teeth corresponding to 120 working teeth, comparing the current rail pressure of one working tooth with the current rail pressure of the previous working tooth of the current rail pressure of the working tooth according to the serial changing sequence of the serial numbers of the working teeth to obtain a current rail pressure difference value of the working tooth after comparison, and counting according to the states of the current rail pressure difference values of two continuous corresponding working teeth;
when the count value is greater than the rail pressure count threshold and the count value reaches a peak value, the number of the working tooth is locked to serve as the pumping tooth number.
Generally, 60 signal disc teeth which are uniformly distributed are arranged on the edge of the outer ring of the crankshaft signal disc, and when the crankshaft signal disc rotates for two circles along with the crankshaft, the current rail pressure of working teeth corresponding to 120 working teeth can be obtained, wherein the number of the 120 working teeth is 0-119. From the above description, after an engine working cycle, the working tooth current rail pressure corresponding to 120 working teeth can be obtained, and the working tooth number and the specific situation of the working tooth current rail pressure are consistent with the existing situation. In order to improve the reliability of identification, the working cycle of the engine is specifically that the current rail pressure of the corresponding working tooth is sequentially obtained according to the number sequence of the working tooth.
After the current rail pressure of the working tooth corresponding to the working tooth with the number of 0-119 is determined, comparing the current rail pressure of the working tooth with the current rail pressure of the working tooth before the current rail pressure of the working tooth according to the sequence of sequential change of the numbers of the working teeth, such as the sequence of sequential increase of the numbers of the working teeth, and after the comparison, obtaining the current rail pressure difference value of the working tooth.
Fig. 2 shows a case in which a working tooth current rail pressure and a working tooth current rail pressure preceding the working tooth current rail pressure are used to determine a continuous two corresponding working tooth current rail pressure difference value; in fig. 2, the n-1 tooth rail pressure is the current rail pressure of the working tooth corresponding to the working tooth with the number of n-1, the n tooth rail pressure is the current rail pressure of the working tooth corresponding to the working tooth with the number of n, and the n-2 tooth current rail pressure is the current rail pressure of the working tooth corresponding to the working tooth with the number of n-2. The state of the current rail pressure difference value of two continuous corresponding working teeth is specifically: the n-th tooth rail pressure corresponds to the n-1-th tooth rail pressure difference (i.e., rail pressure difference 1 in fig. 2), and the n-1-th tooth rail pressure corresponds to the n-2-th tooth rail pressure difference (i.e., rail pressure difference 2 in fig. 2). In FIG. 2, n may be any one of values 0 to 119; when n is taken as 0 or 1, the n-1 or n-2 tooth rail pressures are set as 0 th tooth rail pressure; so as to satisfy specific calculation processing.
And after comparing and counting the current rail pressures of the working teeth corresponding to the 120 working teeth, locking the number of the working teeth to be used as the pumping oil tooth number when the count value is larger than the rail pressure count threshold and reaches the peak value.
In one embodiment of the application, when counting according to the state of the current rail pressure difference value of two continuous corresponding working teeth, when the current rail pressure difference value of two continuous working teeth is greater than 0, the current count value is accumulated by 1;
and when the current rail pressure difference value of two continuous working teeth is smaller than 0, the current count value is reduced by 1, otherwise, the current count value is cleared.
For the implementation in fig. 2, when the current rail pressure difference value of two continuous working teeth is greater than 0, the current count value is accumulated by 1, that is, when the rail pressure difference value 1 and the rail pressure difference value 2 are both greater than 0, the counter is used for counting, and when the counter counts, the counter is used for counting in a mode of accumulating 1 or subtracting 1 each time. In fig. 2, when the rail pressure difference 1 and the rail pressure difference 2 are both greater than 0, that is, the n-1 th tooth rail pressure is greater than the n-2 th tooth rail pressure, and the n-th tooth rail pressure is greater than the n-1 th tooth rail pressure, it is known from the above description that the oil pumping characteristics are matched. When the current rail pressure difference value of two continuous working teeth is smaller than 0, the current count value is required to be reduced by 1 when the current rail pressure difference value is matched with the oil injection characteristic according to the above description; when the current rail pressure difference value of two continuous working teeth, specifically, one rail pressure difference value is larger than 0 and the other rail pressure difference value is smaller than 0, the error exists in the current change condition, and the current count value needs to be cleared.
In one embodiment of the application, the counter can adopt the existing common counting mode, and after counting, the counter value is larger than the rail pressure counting threshold value and reaches the peak value, the number of the working teeth is locked to be used as the pumping tooth number. In specific implementation, the rail pressure counting threshold value can be obtained by calibration and determination according to experiments, and engines of different models have different rail pressure counting threshold values. Generally, when the intervention rail pressure deviation P is set δ In this case, since the plurality of track pressure rising sections are obtained by performing the experiment, the counts of the plurality of rising sections reaching the peak value are not necessarily equal, and therefore, to identify all the rising sections, the threshold value, that is, the minimum count value, is determined by considering the section with the smallest count. However, this minimum count value cannot be used directly as a threshold value, and a certain margin is left, so that the minimum count value is subtracted by 2 to be used as a rail pressure count threshold value. Peak to peakThe value, specifically, a count value is in an extremum state, and the count value is reduced after reaching the peak value.
When the above-mentioned counting is performed and the pumping tooth number is determined, after the working tooth current rail pressure of the working tooth with the number 119 is obtained after the working cycle of an engine is finished, the above-mentioned comparing and counting determining steps are performed, at this time, the current rail pressures of all the working teeth corresponding to the fixed working teeth can be determined.
In one embodiment of the application, the number of pumping teeth N is also counted during an engine operating cycle when determining the pumping teeth number. The number N of pumping teeth numbers can also be counted after the above-mentioned determination of pumping teeth, as shown in fig. 2.
After counting the number N of the oil pumping teeth, checking the obtained oil pumping teeth, namely checking the oil pumping time;
when the oil pumping moment is checked, N oil pumping tooth numbers are arranged according to the sequence of the number sizes, so that the difference value of the corresponding numbers of the two adjacent oil pumping tooth numbers is calculated; when all the number differences meet the check at equal intervals, the determined pumping tooth numbers and the number N of the pumping tooth numbers pass the check.
FIG. 3 shows a schematic diagram of checking by using N pumping teeth numbers, wherein the N pumping teeth numbers are arranged according to the sequence of the numbers and form a cycle during checking; in fig. 3, the 2 nd pumping tooth number is the pumping tooth number of the second position arranged in sequence; the 1 st pumping tooth number is the pumping tooth number of the first position which is sequentially arranged, and the N pumping tooth number is the pumping tooth number of the N position which is sequentially arranged, so that when the pumping tooth numbers are sequentially arranged in a larger order, the number corresponding to the first pumping tooth number is the smallest, and the number corresponding to the N pumping tooth number is the largest; when arranged in order of successively smaller, the situation is completely reversed.
The characteristic of the engine working cycle oil pumping is known that the oil pumping time is generally in an equidistant distribution rule, namely, after being sequentially distributed, the difference values of adjacent oil pumping tooth numbers are basically equal; and the N pump oil tooth numbers are different, and the pump oil tooth number adjacent to the N pump oil tooth number is the 1 st pump oil tooth number.
In fig. 3, an implementation case of checking by using N pumping teeth numbers is shown, specifically, the difference between the 2 nd pumping teeth number and the 1 st pumping teeth number is obtained, the difference 1 is calculated by an absolute value arithmetic unit, and then compared with 120/n+a, when the absolute value of the difference 1 is less than or equal to 120/n+a, the checking of the difference 1 is passed, a is an allowable tooth number error, the tooth number error a can be generally 1 or 2, and can be specifically selected as required, so as to meet the actual checking requirement.
Other verification cases can be described with reference to the case where the 2 nd pump tooth number is different from the 1 st pump tooth number, and the corresponding verification is performed. When checking the nth pumping tooth number with the 1 st pumping tooth number, the comparison with 120 x (N-1)/n+a is needed.
When the method of fig. 3 is adopted for verification, when the number of verification passes is consistent with N, the verification of the oil pumping moment passes, otherwise, the verification of the oil pumping moment does not pass, resetting is needed, and after resetting, the working condition waiting for over run and the corresponding intervention recognition step need to be re-entered, as shown in fig. 1.
In one embodiment of the application, after verification passes, the determined pumping tooth number is stored.
After the determined oil pumping tooth number is stored, the rail pressure control can be effectively realized when the subsequent engine works, and the problem of large rail pressure fluctuation can be effectively solved. Of course, after the determined pump tooth number is stored, when the intervention recognition condition is judged, the judgment may be made based on the storage state. If the pumping tooth number is stored, the intervention recognition condition is not satisfied, that is, the steps and the processes for recognizing the pumping moment are not needed to be executed. Generally, the pumping tooth number may be stored in an EEPROM, and the location of the specific storage, and the subsequent reading and identification by an engine Electronic Control Unit (ECU) may be consistent with the prior art, as is well known to those skilled in the art, so as to satisfy the actual rail pressure control.
In combination, the device for identifying the oil pumping time of the engine in an interventional way comprises
The position sensor is used for acquiring the position state of the signal disc teeth on the crankshaft signal disc;
the rail pressure sensor is used for collecting the current rail pressure of the disk teeth corresponding to the signal disk teeth;
the identifying controller is used for identifying and determining that the engine enters a waiting over run working condition, and configuring an intervention setting rail pressure when the intervention identifying condition is met under the waiting over run working condition so as to control the engine to pump oil based on the intervention setting rail pressure;
for an engine working cycle based on intervention setting rail pressure, the recognition controller collects the position state of a signal disc tooth obtained by a crankshaft position sensor and the current rail pressure of the disc tooth obtained by a rail pressure sensor to generate corresponding working teeth and the current rail pressure state of the working teeth corresponding to the working teeth;
based on the current rail pressure state of the working teeth corresponding to all the working teeth under the working cycle of the engine, the identification controller determines the pumping tooth number meeting the pumping characteristic under the working cycle of the engine so as to utilize the pumping tooth number to represent the pumping moment of the oil pump, wherein the pumping tooth number is the number of the working tooth meeting the pumping characteristic under the working cycle of the engine.
In fig. 4, the position sensor, the rail pressure sensor and the identification controller may all take the form of a conventional common type, for example, the position sensor may take the form of a conventional common crankshaft position sensor so as to correspond to the signal disc teeth on the crankshaft signal disc, so as to identify the corresponding obtained signal disc teeth; the rail pressure sensor can be used for acquiring the corresponding current rail pressure of the disc teeth, and the mode and principle for specifically acquiring the current rail pressure of the disc teeth can be consistent with the existing mode.
The identification controller comprises an engine electronic control unit, a counter and equipment for identifying the conditions of the engine over run working condition and the like, and can be specifically selected according to the requirements. The process of specifically implementing the intervention recognition of the engine oil pumping time by the recognition controller may refer to the above description, and will not be repeated here.
In one embodiment of the application, there is also provided a storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the above method, for identifying the engine oil pump time.
In one embodiment of the application, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored on a computer readable storage medium. Based on this understanding, the technical solution of the present application may be embodied essentially or in part or all of the technical solution or in part in the form of a software product stored in a storage medium for performing all or part of the steps of the method according to the embodiments of the present application.
In particular, the memory, storage medium may be a computer readable storage medium, which may be, for example, ROM, random Access Memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, etc.
While the preferred embodiment of the present application has been described in detail, the present application is not limited to the above embodiment, and various equivalent modifications and substitutions can be made by those skilled in the art without departing from the spirit of the present application, and these equivalent modifications and substitutions are intended to be included in the scope of the present application as defined in the appended claims. The above-described embodiments of the present application do not limit the scope of the present application. Any other corresponding changes and modifications made in accordance with the technical idea of the present application shall be included in the scope of the claims of the present application.
Claims (8)
1. A method for intrusively identifying the oil pumping moment of an engine, which is characterized in that the identification method comprises the following steps:
determining that the engine enters a waiting over run working condition;
for an engine entering a waiting over run working condition, when the engine is determined to meet an intervention identification condition under the waiting over run working condition, configuring an intervention setting rail pressure so that the engine pumps oil based on the intervention setting rail pressure;
collecting the current rail pressure of the disk teeth corresponding to each signal disk tooth on a crankshaft signal disk for an engine working cycle based on the intervening set rail pressure so as to obtain the current rail pressure state of the working teeth of the corresponding working teeth based on the collected current rail pressure of the disk teeth;
determining a pumping tooth number meeting pumping characteristics under the working cycle of the engine based on the current rail pressure state of the working teeth corresponding to all working teeth under the working cycle of the engine so as to utilize the pumping tooth number to represent the pumping moment of the oil pump, wherein the pumping tooth number is the number of the working tooth meeting the pumping characteristics under the working cycle of the engine;
determining that the intervention recognition condition is met under the waiting over run working condition, wherein the meeting of the intervention recognition condition comprises that the engine is under the waiting over run working condition, the current rail pressure corresponding to the current signal panel tooth is smaller than a calibrated safe rail pressure threshold value, the oil pumping moment of the engine is not recognized, and the engine is not affected by the intervention recognition fault at present;
when the intervention setting rail pressure is configured, the following steps are: p (P) Int ＝P 0 +P δ Wherein, the method comprises the steps of, wherein,
P Int setting rail pressure for intervention, P 0 To preset the current rail pressure, P δ Is rail pressure deviation.
2. The method for intrusively identifying engine oil pumping moments according to claim 1, wherein: for an engine, the crankshaft signal panel rotates for two circles to obtain the current rail pressure of working teeth corresponding to 120 working teeth according to 60 signal panel teeth on the crankshaft signal panel, wherein the number of the 120 working teeth is 0-119;
when determining the pumping tooth number meeting the pumping characteristic based on the current rail pressures of the working teeth corresponding to 120 working teeth, comparing the current rail pressure of one working tooth with the current rail pressure of the previous working tooth of the current rail pressure of the working tooth according to the serial changing sequence of the serial numbers of the working teeth to obtain a current rail pressure difference value of the working tooth after comparison, and counting according to the states of the current rail pressure difference values of two continuous corresponding working teeth;
when the count value is greater than the rail pressure count threshold and the count value reaches a peak value, the number of the working tooth is locked to serve as the pumping tooth number.
3. The method for intrusively identifying engine oil pumping moments according to claim 2, wherein: when counting according to the state of the current rail pressure difference value of the two continuous corresponding working teeth, when the current rail pressure difference value of the two continuous working teeth is larger than 0, accumulating the current count value by 1;
and when the current rail pressure difference value of two continuous working teeth is smaller than 0, the current count value is reduced by 1, otherwise, the current count value is cleared.
4. The method for intrusively identifying engine oil pumping moments according to claim 2, wherein: the number of pumping teeth N is also counted at an engine duty cycle when determining the pumping teeth number.
5. The method for intrusively identifying engine oil pumping moments according to claim 4, wherein: the method also comprises the step of checking the oil pumping moment;
when the oil pumping moment is checked, N oil pumping tooth numbers are arranged according to the sequence of the number sizes, so that the difference value of the corresponding numbers of the two adjacent oil pumping tooth numbers is calculated; when all the number differences meet the check at equal intervals, the determined pumping tooth numbers and the number N of the pumping tooth numbers pass the check.
6. The method for intrusively identifying engine oil pumping moments according to claim 5, wherein: and after the verification is passed, storing the determined pump oil tooth number.
7. An apparatus for intrusively identifying a time of engine oil pumping, comprising
The position sensor is used for acquiring the position state of the signal disc teeth on the crankshaft signal disc;
the rail pressure sensor is used for collecting the current rail pressure of the disk teeth corresponding to the signal disk teeth;
the identifying controller is used for identifying and determining that the engine enters a waiting over run working condition, and configuring an intervention setting rail pressure when the intervention identifying condition is met under the waiting over run working condition so as to control the engine to pump oil based on the intervention setting rail pressure;
for an engine working cycle based on intervention setting rail pressure, the recognition controller collects the position state of a signal disc tooth obtained by a crankshaft position sensor and the current rail pressure of the disc tooth obtained by a rail pressure sensor to generate corresponding working teeth and the current rail pressure state of the working teeth corresponding to the working teeth;
based on the current rail pressure state of the working teeth corresponding to all the working teeth under the working cycle of the engine, the identification controller determines the pumping tooth number meeting the pumping characteristic under the working cycle of the engine so as to utilize the pumping tooth number to represent the pumping moment of the oil pump, wherein the pumping tooth number is the number of the working tooth meeting the pumping characteristic under the working cycle of the engine.
8. A storage medium having stored thereon a computer program for the interventional identification of the moment of pumping oil of an engine, characterized in that the computer program, when executed by a processor, carries out the steps of the method according to any one of claims 1 to 6.
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