CN109162818A - A kind of control system of engine, control method and engine - Google Patents
A kind of control system of engine, control method and engine Download PDFInfo
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- CN109162818A CN109162818A CN201811286352.2A CN201811286352A CN109162818A CN 109162818 A CN109162818 A CN 109162818A CN 201811286352 A CN201811286352 A CN 201811286352A CN 109162818 A CN109162818 A CN 109162818A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
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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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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The invention discloses a kind of control system of engine, control method and engines.The control system includes the first ECU, the 2nd ECU, the first communication bus and at least one the second communication bus；First ECU sends heartbeat signal for controlling engine operation, and by the first communication bus and all second communication bus；2nd ECU sends heartbeat feedback signal when detecting heartbeat signal for detecting heartbeat signal；When the heartbeat signal transmitted on the first communication bus is not detected in the 2nd ECU in the first preset time period, the heartbeat signal transmitted on the second communication bus is detected；When the heartbeat signal transmitted on the second communication bus is not detected in the 2nd ECU in the second preset time period, determine that the first ECU breaks down, is switched to the 2nd ECU control engine operation.Technical solution of the present invention can avoid the problem of the first ECU failure caused by the first communication bus failure is judged by accident, improve the reliability of engine control.
Description
Technical field
The present embodiments relate to engine control technologies more particularly to a kind of control systems of engine, control method
And engine.
Background technique
Electric-control motor is increasingly becoming the main trend of industry development due to advantages such as its fuel consumption and emissions,
But the development of electric-control motor is also restricted by several factors, such as: the reliability of control system.Improve the reliable of control system
Property, it is particularly important to guaranteeing that engine machine operates normally, especially in field peculiar to vessel, even more requires to occur in control system
It still is able to maintain the normal operation of engine under fault condition.
In addition, the requirement in the 3rd the 9th chapter of China Classification Society classification rules about electric-control motor is pointed out: electric-control system
The middle equipment that main engine normal operation may be influenced because of functional fault, should have duplexed system, such as electronic controller, song
The type of Shaft angle measuring device, two systems is identical with function, when one of them malfunctions, another set of system energy
It is a set of before automatic replacement to work on, to maintain the normal operation of diesel engine, and it is simultaneously emitted by relative alarm.
Available engine electric-control system Redundancy Design scheme, core are to monitor active and standby electronics control by security system by machine
The working condition of unit ECU processed, spare ECU are in standby.Specific work process is as follows: active and standby ECU is generated as heartbeat
Side, by same communication bus (such as can be controller area network bus), passes to security system for heartbeat inspecting frame
System.Security system monitors the heartbeat and diagnostic message of active and standby ECU in real time, judges whether active and standby ECU works normally, and according to switching
Condition is controlled and is switched between active and standby ECU.The prior art mainly has the disadvantage that: one, active and standby ECU is made by security module
Condition monitoring is carried out for third party, active and standby ECU only passes through a CAN line and security module communication, when the CAN line breaks down
When, active and standby ECU will be unable to not receive heartbeat inspecting signal with security module normal communication, security module, lead to security module
It can not correctly judge ECU failure or CAN line failure；Two, active and standby ECU switching must be controlled by security module, security and
The joint development risk and difficulty of ECU control unit are larger.
Summary of the invention
The embodiment of the present invention provides the control system, control method and engine of a kind of engine, starts electromechanics to realize
The Redundancy Design of control system improves the reliability of active and standby ECU condition monitoring, electric-control system caused by reducing because of network line problem
Paralysis problem.
In a first aspect, the embodiment of the present invention provides a kind of control system of engine, comprising: the first electronic control unit
ECU, the second electronic control unit ECU, the first communication bus for connecting the first ECU and the 2nd ECU and connection the first ECU
With at least one the second communication bus of the 2nd ECU；
First ECU passes through first communication bus and all described for controlling engine operation
Two communication bus send heartbeat signal to the 2nd ECU；
2nd ECU is used to detect the heartbeat on first communication bus and/or second communication bus
Signal, and when detecting the heartbeat signal to the first communication bus or the second communication bus for detecting the heartbeat signal
Send heartbeat feedback signal；
When the heartbeat letter transmitted on first communication bus is not detected in the 2nd ECU in the first preset time period
Number when, detect the heartbeat signal transmitted on second communication bus；
When the heartbeat letter transmitted on second communication bus is not detected in the 2nd ECU in the second preset time period
Number when, determine that the first ECU breaks down, be switched to the 2nd ECU and control the engine operation.
Second aspect, the embodiment of the present invention also provide a kind of control method of engine, suitable for above-mentioned control system,
Include:
First ECU sends heartbeat signal to the first communication bus and all second communication bus；
2nd ECU detects the heartbeat signal transmitted on first communication bus in the first preset time period；
When the heartbeat letter transmitted on first communication bus is not detected in the 2nd ECU in the first preset time period
Number when, detect the heartbeat signal transmitted on second communication bus；
If the heartbeat letter transmitted on second communication bus is not detected in the 2nd ECU in the second preset time period
Number, determine that the first ECU breaks down, is switched to the 2nd ECU and controls the engine operation.
The third aspect, the embodiment of the present invention also provide a kind of engine, including above-mentioned control system.
The control system of engine provided in an embodiment of the present invention include: the first ECU, the 2nd ECU, connection the first ECU and
At least one the second communication bus of the first communication bus of 2nd ECU and connection the first ECU and the 2nd ECU；First ECU is used
Heartbeat signal is sent to the 2nd ECU in control engine operation, and by the first communication bus and all second communication bus；The
Two ECU are used to detect heartbeat signal on the first communication bus and/or the second communication bus, and when detecting heartbeat signal to
The first communication bus or the second communication bus for detecting heartbeat signal send heartbeat feedback signal；When the 2nd ECU is pre- first
If the heartbeat signal transmitted on the first communication bus is not detected in the period, the heartbeat transmitted on the second communication bus is detected
Signal；When the heartbeat signal transmitted on the second communication bus is not detected in the 2nd ECU in the second preset time period, the is determined
One ECU breaks down, and is switched to the 2nd ECU control engine operation.By being arranged at least between the first ECU and the 2nd ECU
Second communication bus of one redundancy, when the 2nd ECU can't detect the first ECU from the first communication bus and the second communication bus
When the heartbeat signal of transmission, the first ECU failure is determined, the 2nd ECU control engine operation is switched to, it is possible to prevente effectively from first
The problem of first ECU failure caused by communication bus failure is judged by accident improves the reliability of engine control, reduces because of network line
The paralysis problem of electric-control system caused by problem.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the control system of engine provided in an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of the control system of another engine provided in an embodiment of the present invention；
Fig. 3 is the structural schematic diagram of the control system of another engine provided in an embodiment of the present invention；
Fig. 4 is the structural schematic diagram of the control system of another engine provided in an embodiment of the present invention；
Fig. 5 is the structural schematic diagram of the control system of another engine provided in an embodiment of the present invention；
Fig. 6 is the partial structural diagram that relay connects in Fig. 5；
Fig. 7 is a kind of flow diagram of the control method of engine provided in an embodiment of the present invention；
Fig. 8 is the first ECU provided in an embodiment of the present invention and the 2nd ECU heartbeat signal testing process schematic diagram.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limiting the invention.It also should be noted that in order to just
Only the parts related to the present invention are shown in description, attached drawing rather than entire infrastructure.
Fig. 1 show a kind of structural schematic diagram of the control system of engine provided in an embodiment of the present invention, the control system
System includes: the first electronic control unit ECU10, the second electronic control unit ECU20, connection the first ECU10 and the 2nd ECU20
At least one the second communication bus 31 of the first communication bus 30 and connection the first ECU10 and the 2nd ECU20；First ECU10
The heart is sent to the 2nd ECU20 for controlling engine operation, and by the first communication bus 30 and all second communication bus 31
Jump signal；2nd ECU20 is used to detect the heartbeat signal on the first communication bus 30 and/or the second communication bus 31, and is examining
Heartbeat feedback letter is sent to the first communication bus 30 for detecting heartbeat signal or the second communication bus 31 when measuring heartbeat signal
Number；When the heartbeat signal transmitted on the first communication bus 30 is not detected in the 2nd ECU20 in the first preset time period, detection
The heartbeat signal transmitted on second communication bus 31；When the second communication is not detected in the 2nd ECU20 in the second preset time period
When the heartbeat signal transmitted in bus 31, determine that the first ECU10 breaks down, is switched to the 2nd ECU20 control engine operation.
It is understood that electronic control unit (Electronic Control Unit, ECU) and common computer one
Sample, by microprocessor (CPU), memory (ROM, RAM), input/output interface (I/O), analog-digital converter (A/D) and whole
The large scale integrated circuits such as shape, driving composition has the function of operation and control, and at runtime, it acquires each sensing to engine
The signal of device carries out operation, and the result of operation is changed into control signal, controls the work of controlled device.It is also carried out pair
The control of memory (ROM/FLASH/EEPROM, RAM), input/output interface (I/O) and other external circuits；Memory ROM
The program of middle storage is to write out with based on the data of many experiments acquirement by accurately calculating, this intrinsic program exists
When engine operation, the signal of each sensor constantly come with acquisition is compared and calculates.The result for comparing and calculating
For to engine igniting, air-fuel ratio, idling, exhaust gas recycling etc. multiple parameters control.In order to improve control system
Stability, the first ECU are used as standby ECU as main ECU, the 2nd ECU.When the first ECU breaks down, the 2nd ECU takes over first
ECU controls engine operation.Control system shown in Fig. 1 shows schematically second communication bus 31, wherein first
It is total that communication bus 30 and the second communication bus 31 can be controller LAN (Controller Area Network, CAN)
Any one of the communication bus such as line, local interconnect network (Local Interconnect Network, LIN) bus, can be with
According to specific requirements flexible choice.
The course of work of the present embodiment is introduced below with reference to Fig. 1: when normal work, the first ECU10 controls engine operation,
And heartbeat signal can be sent to the first communication bus 30 and the second communication bus 31, the 2nd ECU20 is used for from the first communication bus
Heartbeat signal is obtained on 30, and sends heartbeat feedback signal, when the 2nd ECU20 cannot lead in the first preset time period from first
Heartbeat signal is obtained in letter bus 30, wherein the first preset time period can be the time interval of three heartbeat signals (for example, just
A heartbeat signal is received every 1ms in normal situation, and 3ms does not receive heartbeat signal), then it may be the first ECU10 hair
Raw failure, it is also possible to which 30 failure of the first communication bus, at this moment the 2nd ECU20 detects the heartbeat letter on the second communication bus 31
Number, if (such as can be 3ms) also detect heartbeat signal in the second preset time period, determine the first ECU10
It breaks down, eliminates the erroneous judgement that the first communication bus 30 breaks down to the first ECU10 in this way, the 2nd ECU20 automatically takes over
The function of first ECU10, control engine operation, the stability of Guarantee control system.
The technical solution of the present embodiment, it is logical by least one redundancy is arranged between the first ECU and the 2nd ECU second
Bus is believed, when the 2nd ECU can't detect the heartbeat signal that the first ECU is sent from the first communication bus and the second communication bus
When, determine the first ECU failure, the 2nd ECU control engine operation is switched to, it is possible to prevente effectively from the first communication bus failure is led
The problem of the first ECU failure erroneous judgement caused, the reliability of engine control is improved, it is automatically controlled caused by reducing because of network line problem
Systemic breakdown problem.In addition, control system provided in this embodiment, which does not introduce security module as third party, carries out state prison
Control, redundancy control capability and security system no interactions reduce system development difficulty, increase without developing jointly with security module
The flexibility of system independence, stability and market application.
Based on the above technical solution, Fig. 2 show the control of another engine provided in an embodiment of the present invention
The structural schematic diagram of system.Optionally, which further includes first sensor group 40, third communication bus 32, oil pump list
Member 50 and electric-controlled fuel injector 60, oil pump unit 50 and electric-controlled fuel injector 60 connect；First sensor group 40 is started for acquiring
First parameter information of machine；First ECU10 is electrically connected with first sensor group 40, for obtaining the first parameter information；Third is logical
Letter bus 32 is connect with the first ECU10 and the 2nd ECU20 respectively, for sending the from the first ECU10 for the first parameter information
Two ECU20；Oil pump unit 50 is electrically connected with the first ECU10 and the 2nd ECU20 respectively, and the first ECU10 is used for control oil pump unit
50 pressure, so that 60 oil spout of electric-controlled fuel injector, the 2nd ECU20 is used to determine the first ECU10 failure time control liquefaction pump unit
50 pressure, so that 60 oil spout of electric-controlled fuel injector；Electric-controlled fuel injector 60 is electrically connected with the first ECU10 and the 2nd ECU20 respectively, the
One ECU10 is for controlling 60 oil spout of electric-controlled fuel injector, and the 2nd ECU20 is for controlling automatically controlled spray when determining the first ECU10 failure
Oily 60 oil spout of device.
It is understood that first sensor group 40 includes the sensor for obtaining engine operating parameter, such as ship
With engine, including crankshaft rotational speed sensor, camshaft speed sensor, rail pressure sensor, water temperature sensor, intake air temperature pressure
Force snesor, engine oil pressure temperature sensor, fuel pressure transmitter, fuel temperature sensor, low temperature water pressure sensor, combustion
Oily leak sensor, engine oil liquid level sensor etc..Third communication bus 32 is used for transmission above-mentioned operating parameter, guarantees first
When ECU10 failure, the 2nd ECU20 can be inputted according to current working and sensor, rapidly adapter tube engine control function.Guarantee
Engine has lasting power output in the case where not parking.
Fig. 3 show the structural schematic diagram of the control system of another engine provided in an embodiment of the present invention.Optionally,
The control system further include: second sensor group 70, for obtaining the second parameter information of engine；2nd ECU20 and second
Sensor group 70 is electrically connected, for obtaining the second parameter information；2nd ECU20 is also used to determining the first ECU10 failure and not
When getting the first parameter information from third communication bus 32, according to the pressure of the second parameter information control oil pump unit 50, with
Make 60 oil spout of electric-controlled fuel injector.
It is understood that the engine of the acquisition of first sensor group 40 cannot be obtained if the first ECU10 paralyses completely
Operating parameter, then the 2nd ECU20 can not continue to control engine operation.Therefore setting second sensor group 70 including the second tunnel
Crankshaft rotational speed sensor, the second road camshaft speed sensor, the second rail pressure sensor, the second tunnel water temperature sensor, second
Road admission pressure temperature sensor, second road engine oil pressure temperature sensor etc. is required into the 2nd ECU20, for first
After ECU10 failure, the 2nd ECU20 can be computed correctly distributive value accordingly, guarantee the output of engine normal kinetic.
Fig. 4 show the structural schematic diagram of the control system of another engine provided in an embodiment of the present invention.Optionally,
Oil pump unit 50 includes that the first oil pump 51 and the second oil pump 52, the first ECU10 are electrically connected with the first oil pump 20, the 2nd ECU20 and
The electrical connection of second oil pump 52；First ECU10 controls the pressure of the first oil pump 51, and the 2nd ECU20 controls the pressure of the second oil pump 52,
First ECU10 is for controlling 60 oil spout of electric-controlled fuel injector；2nd ECU20 is automatically controlled for controlling when determining the first ECU10 failure
60 oil spout of fuel injector.
Under normal circumstances, the first ECU10 is as control unit of engine, carries out sensor, actuator (such as oil pump list
Member) signal processing and control, control the operating status of engine, the first ECU10 controls the first oil pump 51, the 2nd ECU20 control
The second oil pump 52 is made, the control of oil mass is realized by pressure closed loop, the 2nd ECU20 is other than controlling the second oil pump 52, without other
Fuction output.If a set of oil pump of any of them goes wrong, it is left a set of power that can be worked independently and guarantee separate unit oil pump
Meet engine output requirement.When system meets following two condition, the first ECU and the 2nd ECU need to switch: 1,
Significant trouble occurs for one ECU10, is quoted by fault alarm mechanism, and the 2nd ECU20 is notified to start, and adapter tube engine controls function
Energy；2, the heartbeat inspecting between the first ECU10 and the 2nd ECU20 does not pass through, and includes the first communication bus 30 and the second communication bus
31 all monitor obstructed out-of-date, and the 2nd ECU20 automatically takes over engine control function, and carries out oil spout according to current work information
Amount calculates, and guarantees that engine has lasting power output.
Fig. 5 show the structural schematic diagram of the control system of another engine provided in an embodiment of the present invention, and Fig. 6 is figure
The partial structural diagram that relay connects in 5.Optionally, which further includes relay 80, and relay 80 includes control
End a and single-pole double-throw switch (SPDT) b processed, the control terminal a of relay 80 are electrically connected with the relay control terminal of the 2nd ECU20, and hilted broadsword is double
The first driving end of the first end b1 and the first ECU10 of throw switch b are electrically connected, the second end b2 of single-pole double-throw switch (SPDT) b and second
The second driving end electrical connection of ECU20, the third end b3 of single-pole double-throw switch (SPDT) b are electrically connected with the first end of electric-controlled fuel injector 60,
The second driving end of first ECU10 and the second driving end of the 2nd ECU20 are all electrically connected with the second end of electric-controlled fuel injector 60；When
When the relay control terminal of 2nd ECU20 does not send control signal to relay, the first end b1 and third of single-pole double-throw switch (SPDT) b
B3 closure is held, the first ECU10 controls 60 oil spout of electric-controlled fuel injector；When the 2nd ECU20 determines that the first ECU10 breaks down, the
The relay control terminal of two ECU20 is to the transmission of relay 80 control signal so that the second end b2 and third of single-pole double-throw switch (SPDT) b
B3 closure is held, the 2nd ECU20 controls 60 oil spout of electric-controlled fuel injector.
With reference to Fig. 6, when relay 80 is not enabled, contact default is connect with the first ECU10, when the 2nd ECU20 is received
Instruction, when adapter tube engine being needed to control, the 2nd ECU20 needs to enable relay driving stitch at once, guarantee the 2nd ECU20 with
Electric-controlled fuel injector 60 quickly establishes connection.The advantages of relay controls be, by the first of the first ECU and the 2nd ECU the driving end every
From, either work normally or ECU fault condition under, will not all influence each other.The benefit of single-pole double throw is, relay not
When enabled, default is connect with the first ECU, greatly reduces the enabled number of relay, increases the reliability that relay system uses.
Fig. 7 show a kind of flow diagram of the control method of engine provided in an embodiment of the present invention, and this method can
To be executed by above-mentioned control system, specifically comprise the following steps:
Step 110, the first ECU send heartbeat signal to the first communication bus and all second communication bus.
Step 120, the 2nd ECU detect the heartbeat signal transmitted on the first communication bus in the first preset time period.
Step 130 is believed when the heartbeat transmitted on the first communication bus is not detected in the 2nd ECU in the first preset time period
Number when, detect the heartbeat signal that transmits on the second communication bus.
If the heartbeat letter transmitted on the second communication bus is not detected in step 140, the 2nd ECU in the second preset time period
Number, determine that the first ECU breaks down, is switched to the 2nd ECU control engine operation.
When normal work, the first ECU controls engine operation, and can send to the first communication bus and the second communication bus
Heartbeat signal, the 2nd ECU sends heartbeat feedback signal for obtaining heartbeat signal from the first communication bus, as the 2nd ECU
Heartbeat signal cannot be obtained from the first communication bus in the first preset time period, wherein the first preset time period can be three
(for example, receiving a heartbeat signal every 1ms under normal circumstances, and 3ms does not receive the heart to the time interval of a heartbeat signal
Jump signal), then it may be that the first ECU breaks down, it is also possible to the first communication bus failure, at this moment the 2nd ECU detection second
Heartbeat signal on communication bus, if (such as can be 3ms) detect that heartbeat is believed yet in the second preset time period
Number, then determine that the first ECU breaks down, and eliminates the erroneous judgement that the first communication bus breaks down to the first ECU in this way, second
ECU automatically takes over the function of the first ECU, control engine operation, the stability of Guarantee control system.
The technical solution of the present embodiment, it is logical by least one redundancy is arranged between the first ECU and the 2nd ECU second
Bus is believed, when the 2nd ECU can't detect the heartbeat signal that the first ECU is sent from the first communication bus and the second communication bus
When, determine the first ECU failure, the 2nd ECU control engine operation is switched to, it is possible to prevente effectively from the first communication bus failure is led
The problem of the first ECU failure erroneous judgement caused, the reliability of engine control is improved, it is automatically controlled caused by reducing because of network line problem
Systemic breakdown problem.In addition, control system provided in this embodiment, which does not introduce security module as third party, carries out state prison
Control, redundancy control capability and security system no interactions reduce system development difficulty, increase without developing jointly with security module
The flexibility of system independence, stability and market application.
Based on the above technical solution, optionally, the control method further include:
If the 2nd ECU detects the heartbeat signal transmitted on the second communication bus, and first in the second preset time period
ECU detects the heartbeat feedback signal transmitted on the second communication bus, then determines that the first communication bus breaks down.
It is understood that when the 2nd ECU receives heartbeat signal from the second communication bus, and the first ECU is logical from second
Letter bus receives heartbeat feedback signal, illustrates that the first ECU and the 2nd ECU are working properly, due to can't detect the first communication
The heartbeat signal transmitted in bus, it is possible to determine that the first communication bus failure can export the fault message, remind staff
The first communication bus is overhauled in time.
Optionally, the control method further include:
If the 2nd ECU detects the fault-signal that the first ECU is sent from the first communication bus or the second communication bus,
It is switched to the 2nd ECU control engine operation.
It is understood that ECU has self-checking function, when the first ECU detects faults itself, and communication function is normal
When, the first ECU can send the 2nd ECU by the first communication bus or the second communication bus for fault message, and the 2nd ECU can
It is controlled with adapter tube engine in time, guarantees that engine operates normally.
Optionally, control system includes first sensor group, third communication bus, oil pump unit and electric-controlled fuel injector,
Control method further include:
The pressure of first ECU control oil pump unit, the first ECU control electric-controlled fuel injector oil spout；
When the 2nd ECU is when determining the first ECU failure, the pressure of the 2nd ECU control oil pump unit, and control electronic control injection
Device oil spout.
Optionally, engine further includes second sensor group, control method further include:
2nd ECU is determining the first ECU failure and when not getting the first parameter information from third communication bus, according to the
The pressure of two parameter information control oil pump units, so that electric-controlled fuel injector oil spout.
Optionally, oil pump unit includes the first oil pump and the second oil pump, and the first ECU is electrically connected with the first oil pump, the 2nd ECU
It is electrically connected with the second oil pump；Control method further include:
When the 2nd ECU determines the first ECU failure, the 2nd ECU controls electric-controlled fuel injector oil spout.
Optionally, control system further includes relay；Control method further include:
When the 2nd ECU determines that the first ECU breaks down, the relay control terminal of the 2nd ECU is sent to relay to be controlled
Signal, so that the second end of the single-pole double-throw switch (SPDT) of relay and third end closure；
2nd ECU controls electric-controlled fuel injector oil spout.
Optionally, the control method further include:
First ECU detects the heartbeat feedback signal transmitted on the first communication bus in third preset time period；
When the heartbeat feedback signal transmitted on the first communication bus is not detected in the first ECU in third preset time period,
Detect the heartbeat feedback signal transmitted on the second communication bus；
If the heartbeat feedback signal transmitted on the second communication bus is not detected in the first ECU in the 4th preset time period,
Then determine that the 2nd ECU breaks down；
Export the prompt information that the 2nd ECU breaks down.
It is understood that the first ECU can be by whether the heartbeat feedback signal for receiving the 2nd ECU transmission judges second
Whether ECU breaks down, and when normal work, after the 2nd ECU is used to from the first communication bus obtain heartbeat signal, and sends the heart
Jump feedback signal, when the first ECU cannot in third preset time period from the first communication bus obtain heartbeat feedback signal,
Middle third preset time period can be the time interval of three heartbeat signals (for example, receiving a heart every 1ms under normal circumstances
Signal is jumped, and 3ms does not receive heartbeat feedback signal), then it may be that the 2nd ECU breaks down, it is also possible to the first communication
Bus failure, at this moment the first ECU detects the heartbeat feedback signal on the second communication bus, if in the 4th preset time period
(such as can be 3ms) detect heartbeat feedback signal yet, then determines that the 2nd ECU breaks down, eliminate first in this way
The erroneous judgement that communication bus breaks down to the 2nd ECU exports the 2nd ECU fault message, and staff is reminded to overhaul in time.
Fig. 8 show the first ECU provided in an embodiment of the present invention and the 2nd ECU heartbeat signal testing process schematic diagram.With
For first communication bus and the second communication bus are all CAN bus, wherein the first ECU is main ECU, and the 2nd ECU is standby ECU,
With reference to Fig. 8, main ECU and standby ECU pass through the progress heartbeat frame check of the channel two-way CAN.CAN1 is normal verification channel, and CAN2 is superfluous
Remaining CAN.Under normal circumstances, main ECU and the 2nd ECU carries out the transmitting of heartbeat frame by CAN1, main ECU as heartbeat generation side,
Standby ECU is used as heartbeat recipient, and when the heartbeat frame that main ECU is sent, when can correctly respond for ECU, system thinks main ECU and standby
ECU is working properly, if standby ECU can not receive heartbeat verification frame for a long time, is monitored by redundancy CAN 2, if CAN2 can
Normally to monitor, show that CAN1 network failure, main ECU and ECU are in normal operating conditions, at this time without carrying out main ECU and ECU
Switching.If redundancy CAN 2 can not also carry out heartbeat inspecting, illustrate that main ECU can not send heartbeat frame, main ECU should at this time
Catastrophe failure occurs, needs to be immediately switched to the Injection Control that standby ECU carries out engine., whereas if main ECU is not received for a long time
It to the feedback frame of standby ECU, excludes outside CAN1 network failure, then it is assumed that standby ECU breaks down, and needs by way of alarm at this time
It notifies user, checks standby ECU failure in time.
The embodiment of the present invention also provides a kind of engine, including any one control system provided by the above embodiment.
Since engine provided in an embodiment of the present invention includes the control system that above-mentioned any embodiment provides, with included control
System has identical and corresponding beneficial effect, and details are not described herein again.
Note that the above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that
The invention is not limited to the specific embodiments described herein, be able to carry out for a person skilled in the art it is various it is apparent variation,
It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out by above embodiments to the present invention
It is described in further detail, but the present invention is not limited to the above embodiments only, without departing from the inventive concept, also
It may include more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (14)
1. a kind of control system of engine characterized by comprising the first electronic control unit ECU, the second electronic control are single
First ECU, the first communication bus for connecting the first ECU and the 2nd ECU and connection the first ECU and the 2nd ECU are extremely
Few second communication bus；
First ECU is led to for controlling the engine operation by first communication bus and all described second
Believe that bus sends heartbeat signal to the 2nd ECU；
2nd ECU is used to detect the heartbeat signal on first communication bus and/or second communication bus,
And it is sent when detecting the heartbeat signal to the first communication bus for detecting the heartbeat signal or the second communication bus
Heartbeat feedback signal；
When the heartbeat signal transmitted on first communication bus is not detected in the 2nd ECU in the first preset time period
When, detect the heartbeat signal transmitted on second communication bus；
When the heartbeat signal transmitted on second communication bus is not detected in the 2nd ECU in the second preset time period
When, determine that the first ECU breaks down, is switched to the 2nd ECU and controls the engine operation.
2. control system according to claim 1, which is characterized in that further include first sensor group, third communication bus,
Oil pump unit and electric-controlled fuel injector, the oil pump unit are connected with the electric-controlled fuel injector；
The first sensor group is used to acquire the first parameter information of the engine；
First ECU is electrically connected with the first sensor group, for obtaining first parameter information；
The third communication bus is connect with the first ECU and the 2nd ECU respectively, is used for first parameter information
The 2nd ECU is sent to from the first ECU；
The oil pump unit is electrically connected with the first ECU and the 2nd ECU respectively, and the first ECU is described for controlling
The pressure of oil pump unit, so that the electric-controlled fuel injector oil spout, the 2nd ECU is used for when determining the first ECU failure
The pressure of the oil pump unit is controlled, so that the electric-controlled fuel injector oil spout；
The electric-controlled fuel injector is electrically connected with the first ECU and the 2nd ECU respectively, and the first ECU is for controlling institute
Electric-controlled fuel injector oil spout is stated, the 2nd ECU is for controlling the electric-controlled fuel injector spray when determining the first ECU failure
Oil.
3. control system according to claim 2, which is characterized in that further include:
Second sensor group, for obtaining the second parameter information of the engine；
2nd ECU is electrically connected with the second sensor group, for obtaining second parameter information；
2nd ECU is also used to determining the first ECU failure and do not getting described the from the third communication bus
When one parameter information, the pressure of the oil pump unit is controlled according to second parameter information, so that the electric-controlled fuel injector sprays
Oil.
4. control system according to claim 2, which is characterized in that the oil pump unit includes the first oil pump and the second oil
Pump, the first ECU are electrically connected with first oil pump, and the 2nd ECU is electrically connected with second oil pump；
First ECU controls the pressure of first oil pump, and the 2nd ECU controls the pressure of second oil pump, described
First ECU is for controlling the electric-controlled fuel injector oil spout；
2nd ECU is for controlling the electric-controlled fuel injector oil spout when determining the first ECU failure.
5. control system according to claim 2, which is characterized in that further include relay, the relay includes control
End and single-pole double-throw switch (SPDT), the control terminal of the relay are electrically connected with the relay control terminal of the 2nd ECU, the hilted broadsword
The first end of commutator is electrically connected with the first driving end of the first ECU, the second end of the single-pole double-throw switch (SPDT) and institute
State the second driving end electrical connection of the 2nd ECU, the third end of the single-pole double-throw switch (SPDT) and the first end of the electric-controlled fuel injector
The second driving end of electrical connection, the second driving end of the first ECU and the 2nd ECU all with the electric-controlled fuel injector the
The electrical connection of two ends；
When the relay control terminal of the 2nd ECU does not send control signal to the relay, the single-pole double-throw switch (SPDT)
First end and third end closure, the first ECU control the electric-controlled fuel injector oil spout；
When the 2nd ECU determines that the first ECU breaks down, the relay control terminal of the 2nd ECU to it is described after
Electric appliance sends control signal so that the second end of the single-pole double-throw switch (SPDT) and third end are closed, described in the 2nd ECU control
Electric-controlled fuel injector oil spout.
6. a kind of control method of engine, which is characterized in that suitable for any control system of Claims 1 to 5, packet
It includes:
First ECU sends heartbeat signal to the first communication bus and all second communication bus；
2nd ECU detects the heartbeat signal transmitted on first communication bus in the first preset time period；
When the heartbeat signal transmitted on first communication bus is not detected in the 2nd ECU in the first preset time period
When, detect the heartbeat signal transmitted on second communication bus；
If the heartbeat signal transmitted on second communication bus is not detected in the 2nd ECU in the second preset time period,
Determine that the first ECU breaks down, is switched to the 2nd ECU and controls the engine operation.
7. control method according to claim 6, which is characterized in that further include:
If the 2nd ECU detects the heartbeat signal transmitted on second communication bus in the second preset time period, and
First ECU detects the heartbeat feedback signal transmitted on second communication bus, then determines first communication bus
It breaks down.
8. control method according to claim 6, which is characterized in that further include:
If the 2nd ECU detects that the first ECU is sent from first communication bus or second communication bus
Fault-signal, then be switched to the 2nd ECU and control the engine operation.
9. control method according to claim 6, which is characterized in that the control system includes first sensor group,
Three communication bus, oil pump unit and electric-controlled fuel injector, the control method further include:
First ECU controls the pressure of the oil pump unit, and the first ECU controls the electric-controlled fuel injector oil spout；
When the 2nd ECU is when determining the first ECU failure, the 2nd ECU controls the pressure of the oil pump unit, and
Control the electric-controlled fuel injector oil spout.
10. control method according to claim 9, which is characterized in that the engine further includes second sensor group, institute
State control method further include:
2nd ECU is determining the first ECU failure and is not getting first parameter from the third communication bus
When information, the pressure of the oil pump unit is controlled according to the second parameter information, so that the electric-controlled fuel injector oil spout.
11. control method according to claim 9, which is characterized in that the oil pump unit includes the first oil pump and second
Oil pump, the first ECU are electrically connected with first oil pump, and the 2nd ECU is electrically connected with second oil pump；The control
Method further include:
When the 2nd ECU determines the first ECU failure, the 2nd ECU controls the electric-controlled fuel injector oil spout.
12. control method according to claim 9, which is characterized in that the control system further includes relay；The control
Method processed further include:
When the 2nd ECU determines that the first ECU breaks down, the relay control terminal of the 2nd ECU to it is described after
Electric appliance sends control signal, so that the second end of the single-pole double-throw switch (SPDT) of the relay and third end closure；
2nd ECU controls the electric-controlled fuel injector oil spout.
13. control method according to claim 6, which is characterized in that further include:
First ECU detects the heartbeat feedback signal transmitted on first communication bus in third preset time period；
When the heartbeat feedback letter transmitted on first communication bus is not detected in the first ECU in third preset time period
Number, detect the heartbeat feedback signal transmitted on second communication bus；
If the heartbeat feedback letter transmitted on second communication bus is not detected in the first ECU in the 4th preset time period
Number, then determine that the 2nd ECU breaks down；
Export the prompt information that the 2nd ECU breaks down.
14. a kind of engine, which is characterized in that including the control system as described in Claims 1 to 5 is any.
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| CN111751111A (en) * | 2020-07-08 | 2020-10-09 | 中国第一汽车股份有限公司 | Engine parameter monitoring device and method and vehicle |
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| CN112731794A (en) * | 2020-12-25 | 2021-04-30 | 中联重科土方机械有限公司 | Excavator redundancy control system and method |
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