CN109884879A - A kind of method of principal and subordinate ECU to multi-sensor cooperation management - Google Patents
A kind of method of principal and subordinate ECU to multi-sensor cooperation management Download PDFInfo
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- CN109884879A CN109884879A CN201910241376.4A CN201910241376A CN109884879A CN 109884879 A CN109884879 A CN 109884879A CN 201910241376 A CN201910241376 A CN 201910241376A CN 109884879 A CN109884879 A CN 109884879A
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Abstract
The invention discloses a kind of principal and subordinate ECU to the method for multi-sensor cooperation management, the following steps are included: sensor B exists: when sensors A, B are normal, main ECU carries out deviation verification to the detected value A of acquisition, from the detected value B of ECU transmission, verifies range fault alarm beyond deviation.When sensors A, B are abnormal, principal and subordinate's ECU detected value is default value C, fault alarm.When sensors A, B one are abnormal, principal and subordinate's ECU detected value is provided by nominal sensor, fault alarm.Sensor B is not present: when sensors A is normal, the interaction of principal and subordinate's ECU data, principal and subordinate's ECU detected value is detected value A, fault-free；When sensors A is abnormal, principal and subordinate's ECU detected value is default value C, fault alarm.The present invention can realize the interaction of principal and subordinate's ECU data in sensor failure, complete the reasonable control to sensor parameters to ensure that engine reliable is accurately run.
Description
Technical field
The invention belongs to technical field of engine control more particularly to a kind of principal and subordinate ECU to multi-sensor cooperation management
Method.
Background technique
Engine ECU is the control core of engine management system, and basic function is to be with engine speed and load
Basis acquires sensor signal, and control instruction is sent to related executing agency after mathematical model calculation processing, executes pre-
Fixed control function, to make engine under real-time working condition and extraneous operating condition always in optimal combustion state, greatly
Most engines generally use single ECU and control it.
With the popularization of high-powered engine, the above engine of 8 cylinders is increasingly by customer acceptance.This engine mostly uses
Master/slave ECU control.Currently, the emphasis of most of control strategies relevant to master/slave ECU is " cutting between master/slave ECU
It changes；Engine Redundant Control is carried out using master/slave ECU ".For example, disclosing one in Chinese invention patent CN106593671A
Kind is based on ETPU four-cylinder diesel engine redundancy fuel-injecting method, specifically discloses " by primary engine controller and donkey engine control
Device processed carries out aero-engine Redundant Control, primary engine controller and donkey engine controller Cooperation controlling engine fortune respectively
Row carries out the control of four cylinder fuel-injecteds by primary engine controller, if primary engine controller breaks down, switches immediately
The control of four cylinder fuel-injecteds is carried out to donkey engine controller ".
When using master/slave ECU, operative sensor need to use 2 sets (such as water temperature sensor, engine oil pressure temperature sensor,
Rail pressure sensor etc.), master/slave ECU respectively connects 1 set；Public sensor (CMPS Camshaft Position Sensor and crankshaft position sensor)
It is electrically connected using 1 set, and with master/slave ECU.If not carrying out reasonable collaboration control to sensor, when one or more passes
When sensor method life failure, sensor parameter value will fail, and certainly will influence engine reliable and accurately run.So master/slave ECU
It is vital for how carrying out coordinated management to multisensor.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, present invention solves the technical problem that being to provide a kind of master
From ECU to the method for multi-sensor cooperation management, it can realize master/slave ECU data interaction at sensor failure, complete
Reasonable control to sensor parameter value, to ensure that engine reliable is accurately run.
In order to solve the above technical problems, the embodiment of the present invention provides a kind of principal and subordinate ECU to the side of multi-sensor cooperation management
Method, main ECU with from ECU, by CAN bus communication connection, sensors A is electrically connected with the main ECU, sensor B with it is described from
ECU electrical connection；The method of the coordinated management the following steps are included:
S1, the default value C for reaching fault alarm condition is demarcated and stores in advance, storage deviation verifies range；
S2, exist and when the sensors A and the sensor B normal as the sensor B, the main ECU according to
The sensors A obtains detected value A, described to obtain detected value B according to the sensor B from ECU and be sent to the main ECU,
The main ECU carries out deviation verification to detected value A, B, if determining fault-free within the scope of deviation verification；If
Not within the scope of the deviation verifies, then fault alarm " principal and subordinate's ECU detected value deviation is larger " is carried out；
S3, exist but when the sensors A and the sensor B abnormal as the sensor B, the main ECU, institute
Stating the detected value obtained from ECU is the default value C, is carried out fault alarm " sensors A and sensor B have failure "；
S4, exist but when the sensors A or the sensor B abnormal as the sensor B, it is the main ECU, described
The detected value obtained from ECU is obtained according to normal sensor, and carries out fault alarm for abnormal sensor；
S5, it is not present as the sensor B；When the sensors A is normal, the main ECU is detected according to sensors A
Value A is simultaneously sent to described from ECU, and the main ECU, the detected value obtained from ECU are the detected value A, fault-free hair
It is raw；When the sensors A is abnormal, the main ECU, the detected value obtained from ECU are the default value C, carry out therefore
Barrier alarm " there are failures for sensors A ".
Preferably, the step S4 is specifically included:
S41, when the sensors A is abnormal, it is described that detected value B is obtained according to the sensor B from ECU and is sent to
The main ECU, the main ECU, the detected value obtained from ECU are the detected value B, carry out fault alarm " sensors A
There are failures "；
S42, when the sensor B is abnormal, the main ECU obtains detected value A according to sensors A, and is sent to institute
It states from ECU, the main ECU, the detected value obtained from ECU are the detected value A, and carrying out fault alarm, " sensor B is deposited
In failure ".
Preferably, before executing the step S2, following steps need to be executed:
Judge that the sensor B whether there is；If it exists, then continue to judge whether are the sensors A and the sensor B
Normally；If it does not exist, then need to only judge whether the sensors A is normal.
Preferably, judge that the sensors A and the whether normal step of the sensor B specifically include:
If the electric signal of the sensors A is within the allowable range, and physical quantity signal is within the allowable range；The then sensing
Device A is normal, and otherwise the sensors A is abnormal；
Equally, if the electric signal of the sensor B within the allowable range, and physical quantity signal is within the allowable range；Then institute
It is normal to state sensor B, otherwise the sensor B is abnormal.
Preferably, the sensors A is water temperature sensor A, and the sensor B is water temperature sensor B；
Alternatively, the sensors A is rail pressure sensor A, the sensor B is rail pressure sensor B；
Again alternatively, the sensors A is engine oil pressure temperature sensor A, the sensor B is engine oil pressure temperature sensing
Device B.
Preferably, it public sensor and the main ECU and described is electrically connected from ECU.
Preferably, the public sensor includes CMPS Camshaft Position Sensor and crankshaft position sensor.
After above-mentioned technical proposal, the beneficial effects of the present invention are:
Method of the principal and subordinate ECU of the present invention to multi-sensor cooperation management；Exist including sensor B or sensor B is not deposited
Management process in both cases；In the case of sensor B exists: sensors A and when sensor B normal, main ECU is according to biography
Sensor A obtain detected value A, detected value B is obtained according to sensor B from ECU and is sent to main ECU, main ECU to detected value A, B into
Row deviation verification, if determining fault-free within the scope of deviation verification；If not within the scope of deviation verifies, into
Row fault alarm " principal and subordinate's ECU detected value deviation is larger ".Sensors A and when sensor B abnormal, carries out fault alarm and " passes
There is failure in sensor A and sensor B ".Sensors A or when sensor B abnormal, main ECU, the detected value obtained from ECU are
It is obtained according to normal sensor, carries out fault alarm for abnormal sensor.
In the case of sensor B is not present: when sensors A is normal, main ECU obtains detected value A according to sensors A and is sent to
From ECU, main ECU, the detected value obtained from ECU are detected value A, and fault-free occurs.When sensors A is abnormal, main ECU, from
The detected value that ECU is obtained is default value C, is carried out fault alarm " sensors A has failure ".
Single ECU not only may be implemented to the independent control of sensor in the present invention, and being directed to can under sensor fault mode
To realize the data interaction of principal and subordinate ECU, sensor parameter value is rationally managed, so that it is guaranteed that engine is more reliable accurate
Operation.And the method logic of the coordinated management is novel, control is simple, easy to implement.
Detailed description of the invention
Fig. 1 is the functional block diagram that principal and subordinate ECU of the present invention is connect with respective sensor；
Fig. 2 is method flow diagram of the principal and subordinate ECU of the present invention to multi-sensor cooperation management；
Fig. 3 is flow chart of the principal and subordinate ECU of the present invention to the method for water temperature sensor A, B coordinated management.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It is retouched it should be appreciated that specific embodiment described herein is intended merely to facilitate simplification
It states, to explain the present invention, is not intended to limit the present invention.
As shown in Figure 1, sensors A is electrically connected with main ECU, wherein sensors A includes water temperature sensor A, engine oil pressure temperature
Spend sensors A, rail pressure sensor A etc.；Sensor B is electrically connected with from ECU, and wherein sensor B includes water temperature sensor B, machine oil
Pressure-temperature sensor B, rail pressure sensor B etc.；Public sensor is electrically connected with main ECU and from ECU.Public sensor includes
CMPS Camshaft Position Sensor and crankshaft position sensor.Main ECU and the friendship from ECU by CAN bus communication connection, between data
Mutually lay the foundation.
Under the premise of the sensors A connecting with main ECU there must be, to embodiment principal and subordinate ECU to multi-sensor cooperation
The method of management is described in detail.
As shown in Fig. 2, the method for coordinated management the following steps are included:
S1, the default value C for reaching fault alarm condition is demarcated and stores in advance, storage deviation verifies range.
S2, when sensor B exists and when sensors A and sensor B normal, main ECU obtains detected value according to sensors A
A obtains detected value B according to sensor B from ECU and is sent to main ECU, and main ECU carries out deviation verification to detected value A, B, if
Within the scope of deviation verification, then fault-free is determined；If not carrying out fault alarm " principal and subordinate within the scope of deviation verifies
ECU detected value deviation is larger ".
S3, exist but when sensors A and sensor B abnormal as sensor B, main ECU, the detection obtained from ECU
Value is default value C, is carried out fault alarm " sensors A and sensor B have failure ".
S4, when sensor B exists but when sensors A or sensor B abnormal, main ECU, the detected value obtained from ECU are
It is obtained according to normal sensor, and carries out fault alarm for abnormal sensor.
S5, it is not present as sensor B；When sensors A is normal, main ECU obtains detected value A according to sensors A and is sent to
From ECU, main ECU, the detected value obtained from ECU are detected value A, and fault-free occurs；When sensors A is abnormal, main ECU, from
The detected value that ECU is obtained is default value C, is carried out fault alarm " there are failures for sensors A ".
In the present embodiment, above-mentioned steps S4 is specifically included:
S41, when sensors A is abnormal, detected value B is obtained according to sensor B from ECU and is sent to main ECU, main ECU,
The detected value obtained from ECU is detected value B, is carried out fault alarm " there are failures for sensors A ".
S42, when sensor B is abnormal, main ECU obtains detected value A according to sensors A, and is sent to from ECU, main
ECU, the detected value obtained from ECU are detected value A, are carried out fault alarm " there are failures by sensor B ".
And before executing above-mentioned steps S2, following steps need to be executed:
Judge that sensor B whether there is；If it exists, then continue to judge whether sensors A and the sensor B are normal；If
It is not present, then need to only judge whether sensors A is normal.
In the present embodiment, judge that sensors A and the whether normal step of sensor B specifically include:
If the electric signal of sensors A is within the allowable range, and physical quantity signal is within the allowable range；Then sensors A is normal,
Otherwise sensors A is abnormal.
Equally, if the electric signal of sensor B within the allowable range, and physical quantity signal is within the allowable range, then sensor B
Normally, otherwise sensor B is abnormal.
Single ECU not only may be implemented to the independent control of sensor in the above method, and under sensor fault mode
Sensor parameter value is rationally managed in the data interaction that principal and subordinate ECU may be implemented, so that it is guaranteed that engine is more reliable accurate
Operation.And the method logic of the coordinated management is novel, control is simple, easy to implement.
It should be understood that
Sensor, a kind of detection device can experience measured information and (believe with the physical quantity for having determining relationship is measured
Number), and the signal can be converted into electric signal etc. according to certain rule, to meet to the transmission of signal, processing, storage, show
Show, record and controls.
Sensor fault situation is divided into:
SRC failure: the electric signal of sensor exceeds a certain range, generally comprises shorted to earth, to power supply short circuit, open circuit etc.
Failure.
PRC failure: the physical quantity signal of sensor exceeds a certain range.
In the following, being carried out by taking water temperature sensor A, B as an example to method of the above-mentioned principal and subordinate ECU to multi-sensor cooperation management detailed
Description.The detected value obtained at this time from ECU and main ECU is water temperature value.
As shown in figure 3, the water temperature sensor B that a, judgement are connect with from ECU whether there is.
B, water temperature sensor B is not present, and continues to judge whether already present water temperature sensor A is normal.
If b1, water temperature sensor A are normal, main ECU obtains water temperature detected value A according to water temperature sensor A, and total by CAN
Line is sent to from ECU, completes data interaction, main ECU and the water temperature value obtained from ECU are water temperature detected value A at this time.
If b2, water temperature sensor A are abnormal, main ECU and the water temperature value obtained from ECU are the default demarcated in advance at this time
Value C.Carrying out the water temperature sensor A that fault alarm-is connect with main ECU simultaneously, there are failures.
C, water temperature sensor B exists, and whether normal continues the water temperature sensor A that judgement is connect with main ECU.
If d, water temperature sensor B exists and water temperature sensor A is normal, continue to judge whether water temperature sensor B is normal.
If d1, water temperature sensor B exist and water temperature sensor A, B is normal, main ECU obtains water according to water temperature sensor A
Temperature detector measured value A obtains water temperature detected value B according to water temperature sensor B from ECU and is sent to main ECU, and main ECU is to water temperature detected value
A, B carries out deviation verification, if determining fault-free within the scope of deviation verification；If not within the scope of deviation verifies,
It is larger then to carry out fault alarm-principal and subordinate's ECU water temperature detected value deviation.
If d2, water temperature sensor B exist and water temperature sensor A is normal, water temperature sensor B is abnormal, main ECU is according to water temperature
Sensors A obtains water temperature detected value A, and is sent to from ECU, and main ECU, the water temperature value obtained from ECU are water temperature detection at this time
Value A, carrying out the water temperature sensor B that fault alarm-is connect with from ECU, there are failures.
E, water temperature sensor B exists, A is not normal for water temperature sensor, continues to judge whether water temperature sensor B is normal.
If e1, water temperature sensor B are normal, water temperature detected value B is obtained according to water temperature sensor B from ECU and is sent to master
ECU, main ECU, the water temperature value obtained from ECU are water temperature detected value B at this time, carry out the water temperature that fault alarm-is connect with main ECU
There are failures for sensors A.
If e2, water temperature sensor B are abnormal, main ECU, from the water temperature value of ECU obtained be the default value demarcated in advance
C carries out fault alarm-water temperature sensor A and water temperature sensor B and there is failure.
Similarly, the above method is also suitable rail pressure sensor A, B, and the detected value obtained at this time from ECU and main ECU is fuel oil pressure
Force value.
It is also applied for engine oil pressure temperature sensor A, engine oil pressure temperature sensor B, is obtained at this time from ECU and main ECU
Detected value be engine oil pressure and temperature value.Its specific steps is not repeated herein.
The foregoing is merely the preferred embodiments of the present invention, it is noted that for those of ordinary skill in the art
For, under the premise of not departing from design principle of the present invention, several modifications and improvements can be also made, these also should be regarded as belonging to this
The protection scope of invention.
Claims (7)
1. a kind of principal and subordinate ECU, by CAN bus communication connection, passes the method for multi-sensor cooperation management, main ECU with from ECU
Sensor A is electrically connected with the main ECU, and sensor B is electrically connected with described from ECU；It is characterized in that, the method for the coordinated management
The following steps are included:
S1, the default value C for reaching fault alarm condition is demarcated and stores in advance, storage deviation verifies range；
S2, when the sensor B exists and when the sensors A and the sensor B normal, the main ECU is according to
Sensors A obtains detected value A, described to obtain detected value B according to the sensor B from ECU and be sent to the main ECU, described
Main ECU carries out deviation verification to detected value A, B, if determining fault-free within the scope of deviation verification；If not existing
Within the scope of the deviation verification, then fault alarm " principal and subordinate's ECU detected value deviation is larger " is carried out；
S3, exist but when the sensors A and the sensor B abnormal as the sensor B, the main ECU, it is described from
The detected value that ECU is obtained is the default value C, is carried out fault alarm " sensors A and sensor B have failure "；
S4, exist but when the sensors A or the sensor B abnormal as the sensor B, the main ECU, it is described from
The detected value that ECU is obtained is to be obtained according to normal sensor, and carry out fault alarm for abnormal sensor；
S5, it is not present as the sensor B；When the sensors A is normal, the main ECU obtains detected value A according to sensors A
And from ECU described in being sent to, the main ECU, the detected value obtained from ECU are the detected value A, and fault-free occurs；
When the sensors A is abnormal, the main ECU, the detected value obtained from ECU are the default value C, carry out failure report
Alert " there are failures for sensors A ".
2. principal and subordinate ECU as described in claim 1 is to the method for multi-sensor cooperation management, which is characterized in that the step S4
It specifically includes:
S41, when the sensors A is abnormal, it is described that detected value B is obtained according to the sensor B from ECU and is sent to described
Main ECU, the main ECU, the detected value obtained from ECU are the detected value B, and carrying out fault alarm, " sensors A exists
Failure "；
S42, when the sensor B is abnormal, the main ECU obtains detected value A according to sensors A, and be sent to it is described from
ECU, the main ECU, the detected value obtained from ECU are the detected value
A is carried out fault alarm " there are failures by sensor B ".
3. principal and subordinate ECU as described in claim 1 is to the method for multi-sensor cooperation management, which is characterized in that described in execution
Before step S2, following steps need to be executed:
Judge that the sensor B whether there is；If it exists, then continue whether just to judge the sensors A and the sensor B
Often；If it does not exist, then need to only judge whether the sensors A is normal.
4. principal and subordinate ECU as claimed in claim 3 is to the method for multi-sensor cooperation management, which is characterized in that judge the biography
The sensor A and sensor B whether normal step specifically includes:
If the electric signal of the sensors A is within the allowable range, and physical quantity signal is within the allowable range；The then sensors A
Normally, otherwise the sensors A is abnormal；
Equally, if the electric signal of the sensor B within the allowable range, and physical quantity signal is within the allowable range；The then biography
Sensor B is normal, and otherwise the sensor B is abnormal.
5. principal and subordinate ECU as described in claim 1 is to the method for multi-sensor cooperation management, which is characterized in that
The sensors A is water temperature sensor A, and the sensor B is water temperature sensor B；
Alternatively, the sensors A is rail pressure sensor A, the sensor B is rail pressure sensor B；
Again alternatively, the sensors A is engine oil pressure temperature sensor A, the sensor B is engine oil pressure temperature sensor B.
6. principal and subordinate ECU as described in claim 1 is to the method for multi-sensor cooperation management, which is characterized in that public sensor
With the main ECU and described be electrically connected from ECU.
7. principal and subordinate ECU as claimed in claim 6 is to the method for multi-sensor cooperation management, which is characterized in that the public biography
Sensor includes CMPS Camshaft Position Sensor and crankshaft position sensor.
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| CN201910241376.4A CN109884879B (en) | 2019-03-28 | 2019-03-28 | Method for cooperative management of master-slave ECU (electronic control unit) on multiple sensors |
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| CN109884879B (en) | 2021-11-16 |
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