CN107143429B - Electronic Unit Pump Diesel Engine ECU redundant system and design method - Google Patents
Electronic Unit Pump Diesel Engine ECU redundant system and design method Download PDFInfo
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- CN107143429B CN107143429B CN201710548288.XA CN201710548288A CN107143429B CN 107143429 B CN107143429 B CN 107143429B CN 201710548288 A CN201710548288 A CN 201710548288A CN 107143429 B CN107143429 B CN 107143429B
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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
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/26—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor
- F02D41/266—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor the computer being backed-up or assisted by another circuit, e.g. analogue
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2400/00—Control systems adapted for specific engine types; Special features of engine control systems not otherwise provided for; Power supply, connectors or cabling for engine control systems
- F02D2400/08—Redundant elements, e.g. two sensors for measuring the same parameter
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Abstract
The invention discloses security PLC, main ECU, standby ECU, power supply, the first drive module and the second drive modules by a kind of Electronic Unit Pump Diesel Engine ECU redundant system and design method, including machine；Security PLC is connect with main ECU and standby ECU respectively by the machine, and the main ECU is connect with standby ECU, and main ECU and standby ECU are connected to power supply respectively, and main ECU is connect with the first drive module, and standby ECU is connect with the second drive module；Security PLC for monitoring the working condition of main ECU and standby ECU, and judges switching condition as main website by the machine, when meeting switching condition, controls and switches between main ECU and standby ECU.The present invention improves the reliability of Electronic Unit Pump Diesel Engine control system.
Description
Technical field
The invention belongs to Electronic Unit Pump Diesel Engine control technologies, and in particular to a kind of Electronic Unit Pump Diesel Engine ECU is superfluous
Remaining system and design method.
Background technique
Electronic controlled diesel is increasingly becoming the mainstream of diesel engine industry development due to advantages such as its fuel consumption and emissions
Trend, but the development of electronic controlled diesel is also restricted by several factors, such as: the reliability of control.Improve control system can
It by property, is particularly important to guaranteeing that diesel engine 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 diesel engine under fault condition.
In addition, the requirement in the 3rd the 9th chapter of China Classification Society classification rules about electronic controlled diesel is pointed out: electric-control system
It is middle that the equipment that main promotion diesel engine runs well may be influenced because of functional fault, there should be 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.
In order to promote the reliability of Electronic Unit Pump Diesel Engine control system, while being also able to satisfy China Classification Society and entering grade rule
The requirement of model, the invention proposes a kind of Electronic Unit Pump Diesel Engine ECU redundant system and design methods.
Summary of the invention
It is automatically controlled to improve the object of the present invention is to provide a kind of Electronic Unit Pump Diesel Engine ECU redundancy system and design method
The reliability of monoblock pump diesel engine control system.
Electronic Unit Pump Diesel Engine ECU redundant system of the present invention: including security PLC by machine, main ECU, standby ECU,
Power supply, the first drive module and the second drive module；
Security PLC connect with main ECU and standby ECU respectively by the machine, and the main ECU is connect with for ECU, main ECU and standby
ECU is connected to power supply respectively, and main ECU is connect with the first drive module, and standby ECU is connect with the second drive module；
Security PLC is as main website by the machine, for monitoring the working condition of main ECU and standby ECU, and judges to switch item
Part is controlled and is switched between main ECU and standby ECU when meeting switching condition.
It further include the first relay and the second relay；
First relay and the second relay connect to power supply respectively；
First relay and the second relay are also connect with security PLC by machine respectively；
First relay is connect with the first drive module；
Second relay is connect with the second drive module；Solenoid valve can be driven by relay after failure
Dynamic part is disconnected with power supply, the failure of any one ECU will not impact another ECU, to effectively realize event
Phragma from.
It is connected between the main ECU and standby ECU by two-way communication bus；Main ECU and standby ECU passes through respectively to be communicated all the way
Bus is connect with security PLC by machine.Due to main ECU by communication bus be transferred to standby ECU be all diesel engine important parameter,
Play the role of vital to the steady switching of diesel engine, so the communication line needs to carry out redundancy, prevents due to failure
Lead to communicating interrupt, the running parameter of diesel engine cannot be transmitted in time.When main ECU and standby ECU pass through wherein communication bus all the way
Mutual heartbeat frame cannot be normally received, needs to switch to the transmitting that another communication bus carries out Diesel Engine Parameters at this time.
The main ECU and standby ECU are each configured to have monitoring and self-diagnosis of trouble cutting capacity, and periodically pass through diagnostic message
Communication bus is transferred to security PLC by machine；Such as crucial electricity of electromagnetic valve driving current, communicating circuit, tach signal Acquisition Circuit
The monitoring on road and self-diagnosis of trouble cutting capacity, and diagnostic message is passed into security PLC by machine by communication every 10s.
A kind of Electronic Unit Pump Diesel Engine ECU redundancy design method of the present invention, using of the present invention automatically controlled
Monoblock pump diesel engine ECU redundant system, first drive module and the second drive module are connect with electronically controlled unit pump respectively；Its
Method includes:
(1) after working on power, main ECU is in running order, implements to control to diesel engine, and standby ECU is in standby；
(2) using security PLC by machine as main website, the working condition of main ECU and standby ECU is monitored in real time, receives main ECU's
After error code, determine whether to meet switching condition, if it is satisfied, then issuing switching command, main ECU is taken over by standby ECU to control
Diesel engine work；
(3) after main ECU is powered on again, main ECU carries out self diagnosis, and diagnosis situation is passed to security PLC by machine, machine
After other security PLC determines main ECU fault-free, then switching command is issued, standby ECU control diesel engine work is taken over by main ECU.
Further, the transmitting for carrying out Diesel Engine Parameters between the main ECU and standby ECU by two-way communication bus, works as master
ECU and standby ECU is total by when wherein communication bus cannot normally receive mutual heartbeat frame all the way, switching to another way communication
The transmitting of line progress Diesel Engine Parameters.
Further, the main ECU and standby ECU acquire diesel engine speed signal in real time.
Further, security PLC acquires the relevant sensor signal of diesel engine security in real time by the machine, and total by communication
Line is transferred to main ECU and standby ECU, in the case where main ECU failure, standby ECU work, important Diesel Engine Parameters is transferred to standby
ECU, to guarantee the stability contorting of diesel engine.
Further.The main ECU and standby ECU are each configured to the heartbeat producer, and heart beat cycle is identical；
Security PLC is by monitoring the heartbeat of main ECU and standby ECU by the machine, to judge the communication of main ECU and standby ECU
Situation；If main ECU and standby ECU carries out Diesel Engine Control all in normal communication state, using the main ECU of default, if main ECU
Occur can not normal communication, security PLC can then start standby ECU at once and carry out control work by machine；It is controlled when using standby ECU
When, machine side security PLC still can monitor the heartbeat of main ECU, if main ECU heartbeating recovery is normal, and based on the diagnosis letter received
Breath judges that main ECU is working properly, then security PLC can switch again as main ECU work by machine.
Further, the main ECU periodically sends Diesel Engine Parameters to standby ECU by way of communication, in standby ECU
Main ECU is taken over come when controlling diesel engine work, standby ECU is using the Diesel Engine Parameters received in advance as control initial parameter, with reality
Existing smooth transition.
Beneficial effects of the present invention:
(1) security PLC can monitor main ECU and standby ECU working condition in real time, receive main ECU's as main website by machine
After error code, determine whether to meet switching condition, if it is satisfied, then issuing instructions to spare ECU, takes over main ECU control diesel oil
Machine work, can guarantee the normal operation of diesel engine.
(2) the important sensor signal of security PLC acquisition passes to standby ECU by communication bus by machine, ensure that diesel oil
Machine even running.
(3) transmitting that main ECU and standby ECU have two-way communication bus to carry out Diesel Engine Parameters, guarantees that Diesel Engine Parameters are real-time
The reliability of transmitting, when there is catastrophe failure in main ECU, standby ECU can according to the newest Diesel Engine Parameters passed over,
Steadily switched and controlled diesel engine steady operation after taking over main ECU.
(4) ECU has monitoring and self-diagnosis of trouble cutting capacity, such as electromagnetic valve driving current, communicating circuit, tach signal acquisition
The monitoring of the Key Circuits such as circuit and self-diagnosis of trouble cutting capacity, and at regular intervals transmit diagnostic message by communication bus
To security PLC by machine.
(5) has stronger trouble isolation serviceability, connection is all using bus form, the confession of solenoid-driven part
Electricity is attached by relay, can be disconnected solenoid-driven part and power supply by relay, be appointed after failure
It anticipates the failure of an ECU, another ECU will not be impacted, to effectively realize Fault Isolation.
Detailed description of the invention
Fig. 1 is ECU Redundancy Design scheme block diagram of the invention；
Fig. 2 is main ECU in the present invention, for data transfer logic block diagram between security PLC by ECU and machine
Fig. 3 is speed curves figure of the present invention using heat engine switching on Mr. Yu's diesel engine；
Wherein: 1, security PLC by machine, 2, main ECU, 3, standby ECU, 4, power supply, the 5, first relay, the 6, first driving mould
Block, 7, electronically controlled unit pump, the 8, second drive module, the 9, second relay.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings.
Electronic Unit Pump Diesel Engine ECU redundant system as shown in Figure 1: including security PLC1 by machine, main ECU2, standby ECU3,
Power supply 4, the first drive module 6 and the second drive module 8.Security PLC1 is connect with main ECU2 and standby ECU3 respectively by the machine,
The main ECU2 is connect with standby ECU3, and main ECU2 and standby ECU3 are connect with power supply 4 respectively, and main ECU2 and the first drive module 6 connect
It connects, standby ECU3 is connect with the second drive module 8；Security PLC1 is as main website by the machine, for monitoring main ECU2 and standby ECU3
Working condition, and judge switching condition, when meeting switching condition, control and switched between main ECU2 and standby ECU3.
It further include the first relay 5 and the second relay in Electronic Unit Pump Diesel Engine ECU redundant system of the present invention
9；First relay 5 and the second relay 9 are connect with power supply 4 respectively；First relay 5 and the second relay 9 are also
It is connect respectively with security PLC1 by machine；First relay 5 is connect with the first drive module 6；Second relay 9 and
The connection of two drive modules 8.Solenoid-driven part and power supply can be disconnected by relay after failure, any one
The failure of ECU will not impact another ECU, to effectively realize Fault Isolation.
As shown in Figure 1, due to main ECU2 by communication bus be transferred to standby ECU3 be all diesel engine important parameter, it is right
The steady switching of diesel engine play the role of it is vital, so the communication line needs to carry out redundancy, i.e., by main ECU2 with it is standby
It is connected between ECU3 by two-way communication bus (i.e. communication bus 1 and communication bus 2), to prevent from causing in communication due to failure
It is disconnected, the running parameter of diesel engine cannot be transmitted in time.When main ECU2 and standby ECU3 are by the way that wherein communication bus cannot be normal all the way
Receive mutual heartbeat frame, need to switch to the transmitting that another communication bus carries out Diesel Engine Parameters at this time.
In Electronic Unit Pump Diesel Engine ECU redundant system of the present invention, security PLC1 has 3 effects by machine, first is that
The heartbeat and diagnostic message for monitoring main ECU2, standby ECU3 in real time, judge whether main ECU2 and standby ECU3 work normally；Second is that hair
It instructs out, appoints the work of an ECU catcher control diesel engine；Third is that the relevant sensor signal of acquisition diesel engine security,
In the case where main ECU2 failure, standby ECU3 work, important Diesel Engine Parameters (such as lubricating oil pressure) are transferred to standby ECU3, to protect
Demonstrate,prove the stability contorting of diesel engine.
In Electronic Unit Pump Diesel Engine ECU redundant system of the present invention, the main ECU2 and standby ECU3 are each configured to have
There are monitoring and self-diagnosis of trouble cutting capacity, and diagnostic message is periodically transferred to security PLC1 by machine by communication bus；Such as electromagnetism
The monitoring of the Key Circuits such as electrohydraulic valve actuator stream, communicating circuit, tach signal Acquisition Circuit and self-diagnosis of trouble cutting capacity, and every
Diagnostic message is passed to security PLC by machine by communication by 10s.
When catastrophe failure occurs for main ECU2, there are two types of situations, first is that main ECU2 can also be diagnosed to be the failure of itself, by event
Barrier code passes to security PLC1 by machine by communication bus (i.e. communication bus 3 in Fig. 1) all the way, second is that the failure of main ECU2 is
Seriously being arrived paralysis, diagnosis and communication work completely can not carry out, and security PLC1 can not receive the heartbeat frame of main ECU2 by this opportunity,
Both of which can be determined that catastrophe failure occurs for main ECU2, and security PLC1 issues instructions to standby ECU3 by machine, and standby ECU3 is opened
Begin to prepare to substitute the control work that main ECU2 takes over diesel engine.The power supply and plug for disconnecting main ECU2 repair either more
It changes, after determining it there is no problem, the plug of main ECU2 is plugged again, carries out self diagnosis after powering on, it will diagnosis after diagnosis
Information passes to security PLC1 by machine, after security PLC1 determines that it can be worked normally completely according to diagnostic message by machine, simultaneously
Main ECU2 and standby ECU3 are sent instructions to, standby ECU3 is made to stop working, main ECU2 substitutes the control work of standby ECU3 catcher diesel engine
Make.
A kind of Electronic Unit Pump Diesel Engine ECU redundancy design method of the present invention, using of the present invention automatically controlled
Monoblock pump diesel engine ECU redundant system, the first drive module 6 and the second drive module 8 are connect with electronically controlled unit pump 7 respectively；
Its method includes:
(1) after working on power, main ECU2 is in running order, implements to control to diesel engine, and standby ECU3 is in standby；
(2) using security PLC1 by machine as main website, the working condition of main ECU2 and standby ECU3 is monitored in real time, receives master
After the error code of ECU2, determine whether to meet switching condition, if it is satisfied, then issuing switching command, master is taken over by standby ECU3
ECU2 works to control diesel engine；
(3) after main ECU2 is powered on again, main ECU2 carries out self diagnosis, and diagnosis situation is passed to security by machine
PLC1 then issues switching command after machine side security PLC1 determines main ECU2 fault-free, takes over standby ECU3 by main ECU2 and controls diesel oil
Machine work.
Diesel engine sensor signal is divided into three classes, be respectively signals of rotational speed sensor, safety and protection monitoring sensor signal and
Other sensors signal, diesel engine speed signal the stable operation of diesel engine, security are controlled play the role of it is vital, and
The requirement of real-time of signal acquisition is higher, needs to carry out redundancy, is respectively fed to main ECU2 and standby ECU3；Safety and protection monitoring sensor
Signal carries out Real-time Feedback to the safe operation situation of diesel engine, if cannot find or handle in time, it is possible to can be to bavin
Oil machine causes irreversible damage, such as lubricating oil pressure, and sensors with auxiliary electrode and security PLC by machine are attached, and will adopt
The signal of collection is spaced specified time tranfer to main ECU2 and standby ECU3, in main ECU2 failure, standby ECU3 work by communication bus 3
In the case where work, important Diesel Engine Parameters are transferred to standby ECU3, to guarantee the stability contorting of diesel engine.Using program energy
The enough effective redundancy quantity for reducing sensor, improves the service efficiency of sensor.
It is as shown in Figure 2 main ECU2, for data transfer logic block diagram between security PLC1 by ECU3 and machine, communication is redundancy
The key technology of design, the main data exchange of system are present in by machine between security PLC1, main ECU2 and standby ECU3.Bus is logical
News are for transmitting heartbeat data, conversation test and control data between main ECU2 and standby ECU3.When the system is operating, on the one hand main
ECU2 and standby ECU3 sends heartbeat message to security PLC1 by machine by communication bus 3, with the main ECU2 of determination and standby ECU3 whether
It operates normally, once security PLC1 detects that main ECU2 heartbeat message stops by machine, standby ECU3 will be immediately switched to and worked.In addition
On the one hand, to guarantee that Diesel Engine Control keeps continuous-stable after control switching, the control system of work periodically will be various
Diesel engine critical operational parameters are sent to standby ECU3 by way of communication, and after sending control switching, standby ECU3 is switching
It is realized a smooth transition afterwards according to the data received in advance as control initial parameter.Wherein, security PLC1 plays Coordinated Communication by machine
Effect, Diesel Engine Control mainly completed by main ECU2 or standby ECU3.In this scenario, main ECU2 and standby ECU3 are each configured to the heart
The producer is jumped, and heart beat cycle is identical.Security PLC1 is by monitoring main ECU2 or for the heartbeat of ECU3 by machine, to judge to lead
The communication condition of ECU2 or standby ECU3.If main ECU2 or standby ECU3 are all in normal communication state, using the main ECU2 of default
Diesel Engine Control is carried out, if significant trouble occurs in main ECU2, leads to not normal communication, security PLC1 can then be started at once by machine
Standby ECU3 carries out control work.When being controlled using standby ECU3, security PLC1 still can monitor the heartbeat of main ECU2 by machine,
If main ECU2 heartbeating recovery is normal, and judges that main ECU2 is working properly based on the diagnostic message received, then security PLC1 by machine
It can switching be again that main ECU2 works.
Fig. 3 show the present invention using the speed curves figure of heat engine switching on Mr. Yu's diesel engine, and speed fluctuation rate is controllable
0.8% hereinafter, the requirement steadily switched can be fully met.
Claims (10)
1. a kind of Electronic Unit Pump Diesel Engine ECU redundant system, it is characterised in that: including security PLC(1 by machine), main ECU(2),
For ECU(3), power supply (4), the first drive module (6) and the second drive module (8)；
Security PLC(1 by the machine) connect, the main ECU(2 with main ECU(2) and standby ECU(3) respectively) connect with standby ECU(3)
Connect, main ECU(2) and standby ECU(3) connect respectively with power supply (4), main ECU(2) connect with the first drive module (6), standby ECU(3)
It is connect with the second drive module (8)；
Security PLC(1 by the machine) be used as main website, for monitoring main ECU(2) and standby ECU(3) working condition, and judge to cut
Change condition, when meeting switching condition, control main ECU(2) and standby ECU(3) between switch over.
2. Electronic Unit Pump Diesel Engine ECU redundant system according to claim 1, it is characterised in that: further include first after
Electric appliance (5) and the second relay (9)；
First relay (5) and the second relay (9) are connect with power supply (4) respectively；
First relay (5) and the second relay (9) are also connect with security PLC(1 by machine) respectively；
First relay (5) connect with the first drive module (6)；
Second relay (9) connect with the second drive module (8).
3. Electronic Unit Pump Diesel Engine ECU redundant system according to claim 1 or 2, it is characterised in that: the main ECU
(2) it is connect between standby ECU(3) by two-way communication bus；Main ECU(2) and standby ECU(3) pass through communication bus all the way respectively
It is connect with security PLC(1 by machine).
4. Electronic Unit Pump Diesel Engine ECU redundant system according to claim 3, it is characterised in that: the main ECU(2)
It is each configured to that there is monitoring and self-diagnosis of trouble cutting capacity with standby ECU(3), and is periodically transferred to diagnostic message by communication bus
Security PLC(1 by machine).
5. a kind of Electronic Unit Pump Diesel Engine ECU redundancy design method, which is characterized in that using such as any institute of Claims 1-4
The Electronic Unit Pump Diesel Engine ECU redundant system stated, first drive module (6) and the second drive module (8) respectively with electricity
Control monoblock pump (7) connection；Its method includes:
(1) after working on power, main ECU(2) it is in running order, diesel engine is implemented to control, standby ECU(3) be in standby；
(2) regard security PLC(1 by machine) as main website, monitor main ECU(2 in real time) and standby ECU(3) working condition, receive master
ECU(2 after error code), determine whether to meet switching condition, if it is satisfied, then switching command is issued, by standby ECU(3) it takes over
Main ECU(2) it works to control diesel engine；
(3) in main ECU(2) power on again after, main ECU(2) carry out self diagnosis, and diagnosis situation is passed into security PLC by machine
(1), security PLC(1 by machine) determine main ECU(2) after fault-free, then switching command is issued, by main ECU(2) take over standby ECU(3)
Control diesel engine work.
6. Electronic Unit Pump Diesel Engine ECU redundancy design method according to claim 5, it is characterised in that: the main ECU
(2) and for the transmitting for carrying out Diesel Engine Parameters between ECU(3) by two-way communication bus, as main ECU(2) and standby ECU(3) logical
When crossing that wherein communication bus cannot normally receive mutual heartbeat frame all the way, switches to another way communication bus and carry out diesel engine
The transmitting of parameter.
7. Electronic Unit Pump Diesel Engine ECU redundancy design method according to claim 6, it is characterised in that: the main ECU
(2) and for ECU(3) diesel engine speed signal is acquired in real time.
8. Electronic Unit Pump Diesel Engine ECU redundancy design method according to claim 7, it is characterised in that: by the machine
Security PLC(1) the relevant sensor signal of diesel engine security is acquired in real time, and main ECU(2 is transferred to by communication bus) and it is standby
ECU(3), in main ECU(2) failure, standby ECU(3) work in the case where, important Diesel Engine Parameters are transferred to standby ECU(3),
To guarantee the stability contorting of diesel engine.
9. according to any Electronic Unit Pump Diesel Engine ECU redundancy design method of claim 5 to 8, it is characterised in that: institute
State main ECU(2) and standby ECU(3) it is each configured to the heartbeat producer, and heart beat cycle is identical；
Security PLC(1 by the machine) by monitoring main ECU(2) and standby ECU(3) heartbeat, to judge main ECU(2) and it is standby
ECU(3 communication condition)；If main ECU(2) and standby ECU(3) all in normal communication state, using the main ECU(2 of default)
Diesel Engine Control is carried out, if main ECU(2) occur can not normal communication, security PLC(1 by machine) standby ECU(3 can be started at once)
Carry out control work；When using standby ECU(3) when being controlled, security PLC(1 by machine) still can monitor main ECU(2) heartbeat,
If main ECU(2) heartbeating recovery is normal, and judges main ECU(2 based on the diagnostic message received) working properly, then security by machine
It PLC(1 can switching be again) main ECU(2) work.
10. Electronic Unit Pump Diesel Engine ECU redundancy design method according to claim 9, it is characterised in that: the master
ECU(2) periodically send Diesel Engine Parameters to by way of communication standby ECU(3), in standby ECU(3) take over main ECU(2)
When working to control diesel engine, standby ECU(3) using the Diesel Engine Parameters received in advance as control initial parameter, it is steady to realize
Transition.
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| CN201710548288.XA CN107143429B (en) | 2017-07-06 | 2017-07-06 | Electronic Unit Pump Diesel Engine ECU redundant system and design method |
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| US11255287B2 (en) * | 2015-09-28 | 2022-02-22 | Westinghouse Air Brake Technologies Corporation | Apparatus and methods for allocating and indicating engine control authority |
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| CN105089856A (en) * | 2015-07-15 | 2015-11-25 | 江苏科技大学 | Self-sufficient type internal combustion engine gas fuel supply system and gas packet pressure control method |
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