CN110300041B - Cloud-based remote maintenance method for automobile electronic control unit - Google Patents
Cloud-based remote maintenance method for automobile electronic control unit Download PDFInfo
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- CN110300041B CN110300041B CN201910586597.5A CN201910586597A CN110300041B CN 110300041 B CN110300041 B CN 110300041B CN 201910586597 A CN201910586597 A CN 201910586597A CN 110300041 B CN110300041 B CN 110300041B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/40006—Architecture of a communication node
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/02—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP]
- H04L67/025—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP] for remote control or remote monitoring of applications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/38—Services specially adapted for particular environments, situations or purposes for collecting sensor information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
- H04W4/48—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for in-vehicle communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L2012/40208—Bus networks characterized by the use of a particular bus standard
- H04L2012/40215—Controller Area Network CAN
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L2012/40267—Bus for use in transportation systems
- H04L2012/40273—Bus for use in transportation systems the transportation system being a vehicle
Abstract
The invention relates to the field of automobile control, in particular to a remote maintenance method of an automobile electronic control unit based on a cloud, which comprises the following steps: 1) the cloud end establishes an automobile electronic control unit database; 2) when the automobile runs, the automobile electronic control unit acquires the running data of the automobile through a sensor; 3) the vehicle-mounted T-BOX reads the running data stored in the vehicle electronic control unit and uploads the running data to the vehicle electronic control unit database at the cloud end; 4) the manufacturer of the automobile electronic control unit calculates to obtain the calibration parameters matched with the optimal performance of the automobile; 5) a manufacturer of the automobile electronic control unit uploads the calibration parameters to an automobile electronic control unit database at the cloud end for storage; 6) and after receiving the parameter modification instruction sent by the cloud end, the vehicle-mounted T-BOX of the vehicle receives the calibration parameters of the manufacturer of the automobile electronic control unit, covers the former parameters of the automobile electronic control unit and adjusts the automobile to the optimal performance matching state.
Description
Technical Field
The invention relates to the field of automobile control, in particular to a remote maintenance method of an automobile electronic control unit based on a cloud.
Background
An automobile Electronic Control Unit (ECU) is an important functional device on an automobile, and parameters of the ECU are required to be calibrated before all automobiles leave a factory, so that matching of all links controlled by the ECU can achieve the best performance. At present, parameter calibration of an ECU is usually carried out by a vehicle manufacturer, which sends a finished vehicle to be delivered to the ECU manufacturer for parameter calibration of the ECU, and the finished vehicle is delivered to the manufacturer after calibration, so that the transportation cost of the vehicle is high. And once the vehicle breaks down during the transmission, the vehicle cannot be maintained in time, the calibration operation of the broken vehicle is influenced, and the normal operation of the parameter calibration of the vehicle ECU cannot be ensured.
On the other hand, in both the development stage and the owner use stage of the vehicle, problems which are not detected by the ECU manufacturer may exist, once the vehicle fails due to the problems, the vehicle needs to be returned to the vehicle manufacturer for repair in order to correct the problems, or the vehicle manufacturer and the ECU manufacturer need to go out to the site for repair, so that the repair cost is greatly increased.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a remote maintenance method of an automobile electronic control unit based on a cloud end.
The purpose of the invention is realized as follows: a remote maintenance method of an automobile electronic control unit based on a cloud comprises the following steps:
1) the cloud end establishes an automobile electronic control unit database which is used for storing calibration parameters of the automobile electronic control unit and collected operation data;
2) when the automobile runs, the automobile electronic control unit collects the running data of the automobile through the sensor and stores the running data;
3) the vehicle-mounted T-BOX reads the running data stored in the vehicle electronic control unit and uploads the running data to the vehicle electronic control unit database at the cloud end;
4) the manufacturer of the automobile electronic control unit calculates according to the running data of the automobile electronic control unit of the vehicle in the automobile electronic control unit database at the cloud end to obtain the calibration parameters matched with the optimal performance of the vehicle;
5) a manufacturer of the automobile electronic control unit uploads the calibration parameters to an automobile electronic control unit database at the cloud end for storage, and sends a parameter modification instruction to the automobile electronic control unit of the vehicle through the cloud end;
6) after receiving a parameter modification instruction sent by a cloud terminal, an on-board T-BOX of a vehicle receives a calibration parameter of a manufacturer of an automotive electronic control unit; and then storing the received calibration parameters into the automobile electronic control unit, covering the previous parameters of the automobile electronic control unit, adjusting the automobile to the optimal performance matching state, and realizing remote maintenance on the automobile electronic control unit.
And the vehicle-mounted T-BOX in the step 3) transmits data with the vehicle electronic control unit through a CAN bus.
And the vehicle-mounted T-BOX in the step 3) transmits data with the vehicle electronic control unit through Bluetooth.
The automobile electronic control unit in the step 6) sends out control signals to various actuators of the automobile according to the calibration parameters calculated by the manufacturer of the automobile electronic control unit so as to adjust the automobile to the optimal performance matching state.
By adopting the scheme, after the automobile electronic control unit database is established at the cloud end, when the automobile runs, the automobile electronic control unit acquires the running data of the automobile through the sensor, and reads the running data stored by the automobile electronic control unit through the vehicle-mounted T-BOX by utilizing the CAN bus, wherein the vehicle-mounted T-BOX is the automobile electronic control unit database uploaded to the cloud end through the wireless network; the collected operational data includes tank temperature, air quality, excess air factor in the exhaust, etc.
The manufacturer of the automobile electronic control unit calculates according to the running data of the automobile electronic control unit of the vehicle in the automobile electronic control unit database at the cloud end to obtain the calibration parameters matched with the optimal performance of the vehicle; a manufacturer of the automobile electronic control unit uploads the calibration parameters to an automobile electronic control unit database at the cloud end for storage, and sends a parameter modification instruction to the automobile electronic control unit of the vehicle through the cloud end; after receiving a parameter modification instruction sent by a cloud terminal, an on-board T-BOX of a vehicle receives a calibration parameter of a manufacturer of an automotive electronic control unit; and then storing the received calibration parameters into an automobile electronic control unit, and after covering the previous parameters of the automobile electronic control unit, sending control signals to various actuators of the automobile by the automobile electronic control unit to adjust the automobile to the optimal performance matching state, so as to realize remote maintenance on the automobile electronic control unit, wherein the actuators comprise a carbon canister electromagnetic valve, an oil nozzle, an ignition coil and the like.
Therefore, when a vehicle manufacturer sends a finished vehicle about to leave a factory to an ECU manufacturer for ECU parameter calibration, the method is used for remotely calibrating the electronic control unit of the vehicle, so that the transportation cost of the vehicle is greatly reduced, the calibration operation of a fault vehicle is not influenced too much even if the vehicle breaks down in the process of sending, and the normal operation of the parameter calibration of the ECU of the vehicle can be ensured.
On the other hand, in the development stage and the use stage of the vehicle owner, even if the vehicle has a fault caused by the problem which is not detected by an ECU (electronic control unit) manufacturer, the method can be used for remotely maintaining the fault vehicle in time, so that the fault vehicle does not need to be sent back to a vehicle manufacturer and the ECU manufacturer, the fault can be eliminated, the engine can reach scientific and feasible rated power and output torque, and low specific oil consumption is reduced as much as possible, so that the maintenance cost is reduced.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
As shown in fig. 1, a remote maintenance method for a cloud-based automotive electronic control unit includes the following steps:
1) the cloud end establishes an automobile electronic control unit database which is used for storing calibration parameters of the automobile electronic control unit and collected operation data;
2) when the automobile runs, the automobile electronic control unit collects the running data of the automobile through the sensor and stores the running data;
3) the vehicle-mounted T-BOX reads the running data stored by the vehicle electronic control unit and uploads the running data to the vehicle electronic control unit database at the cloud end, and the vehicle-mounted T-BOX transmits data with the vehicle electronic control unit through a CAN bus or transmits data with the vehicle electronic control unit through Bluetooth.
4) The manufacturer of the automobile electronic control unit calculates according to the running data of the automobile electronic control unit of the vehicle in the automobile electronic control unit database at the cloud end to obtain the calibration parameters of the optimal performance matching of the vehicle, and the specific matching process is as follows:
calibrating the oil injection ending time: and determining the most appropriate oil injection end time by taking the content of the hydrocarbon emission in the tail gas as an index.
Calibrating a load model: the amount of fresh air entering the cylinder is accurately judged.
Thirdly, calibrating the fuel injection quantity: the air-fuel ratio is corrected.
Calibrating the ignition advance angle: at different rotation speed and load points, the ignition advance angle which enables the output torque to be maximum is searched on the premise that knocking does not occur.
Matching knock control:
the signal of the knock sensor is input into the automobile electronic control unit, and is subjected to a series of processing such as signal amplification, band-pass filtering, rectification, integration and the like, and the final integrated signal is used for judging whether knocking occurs or not by the automobile electronic control unit, and the knocking is avoided by delaying the ignition advance angle.
Sixthly, hot car performance matching:
in order to prevent fuel vapor from escaping from the fuel tank to cause pollution, the carbon canister is required to have enough ventilation, the opening time of the carbon canister is set at different working points, and the fuel injection quantity is corrected through control feedback control.
The highest catalytic conversion efficiency of the three-way catalyst is ensured, and the dynamic deviation of the concentration of the mixed gas is compensated. And the oxygen sensor is heated and controlled, so that the ceramic body of the oxygen sensor is prevented from cracking.
Matching at starting and idling speed: when the sudden load of an electrical appliance, an air conditioner switch and a power steering engine work, obvious rotation speed oscillation and engine shake are not allowed to occur. The spark advance angle is not typically adjusted to a maximum at idle in order to have a certain torque reserve. The sudden load maintains the stable idling speed by adjusting the ignition advance angle and increasing the air inflow.
Emission matching: the method comprises the steps of searching a region with the best conversion efficiency of the three-way catalytic converter, calibrating the heating function of the three-way catalytic converter, and enabling the mixed gas to be combusted in an exhaust pipe by delaying the ignition advance angle after starting, so that the three-way catalytic converter can reach the working temperature as soon as possible.
Ninthly, driving performance matching: in order to protect vehicle parts such as an engine, tires and the like, when the maximum rotating speed is approached, the rotating speed is limited in a mode of delaying the ignition advance angle and cutting off oil, and the rotating speed is stably increased by adjusting the ignition angle, so that fluctuation is avoided, and acceleration jitter is prevented.
On Board Diagnostic (OBD) and monitoring function matching on the R (R) side
The hardware of the electric control system is monitored, including monitoring whether various sensors and actuators have faults or not, whether sensor signals are credible or not, whether phenomena such as short circuit and open circuit exist or not, and reasonable fault judgment threshold values are set for each sensor and actuator, so that the problem that an engine cannot work normally due to misjudgment is avoided.
The method monitors the accelerator pedal and the electronic throttle body, ensures that a signal output by the accelerator pedal reflects the requirement of a driver in a real-time manner, then ensures that the electronic throttle body correctly executes the requirement of the opening degree of the accelerator, and has to carry out fuel cut control to ensure the safety performance of vehicle running when the signal is not credible.
Finally, by measuring the torque under the conditions of various air-fuel ratios and various ignition angles, the efficiency characteristic about the air-fuel ratio and the efficiency characteristic about the ignition angle can be obtained, and the automobile electronic control unit can calculate and obtain corresponding air intake quantity, fuel injection quantity and ignition advance angle.
5) A manufacturer of the automobile electronic control unit uploads the calibration parameters to an automobile electronic control unit database at the cloud end for storage, and sends a parameter modification instruction to the automobile electronic control unit of the vehicle through the cloud end;
6) after receiving a parameter modification instruction sent by a cloud terminal, an on-board T-BOX of a vehicle receives a calibration parameter of a manufacturer of an automotive electronic control unit; and then the received calibration parameters are stored in the automobile electronic control unit, and the parameters in the past of the automobile electronic control unit are covered, the automobile electronic control unit sends control signals to various actuators of the automobile according to the calibration parameters calculated by a manufacturer of the automobile electronic control unit to adjust the automobile to the optimal performance matching state, and the remote maintenance of the automobile electronic control unit is realized.
The optimal performance matching state of the automobile is the optimal matching state among air intake control, reasonable air distribution phase, throttle valve opening, optimal air-fuel ratio of oil injection and proper ignition advance angle for the automobile with a gasoline engine as an engine, and the air pressure and the air lean degree of different areas are different, so that the fuel quantity required by combustion is different, and the fuel quantity can be identified by a controller and corrected by an actuator.
The engine has good steady-state performance by remote calibration and maintenance of an automobile electronic control unit, the design power, the torque and the oil consumption performance of the engine are achieved under the condition that the engine is ensured to work without knocking and overheating, various electrical loads, a transmission system, a braking system, a three-way catalytic converter and the like of the engine and a vehicle are enabled to work coordinately, the engine is ensured to have good starting idling performance, good driving comfort and emission performance under various environments and working conditions, the matching of a vehicle-mounted diagnosis system is perfected, the engine and the vehicle are ensured to reach strict optimal performance indexes of safety, environmental protection, driving comfort and the like under various conditions, and the transportation cost and the development cost are greatly reduced.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and it is apparent that those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (4)
1. A remote maintenance method of an automobile electronic control unit based on a cloud end is characterized by comprising the following steps:
1) the cloud end establishes an automobile electronic control unit database which is used for storing calibration parameters of the automobile electronic control unit and collected operation data;
2) when an automobile runs, an automobile electronic control unit acquires running data of the automobile through a sensor, stores the running data, and the running data comprises water tank temperature, air quality and an excess air coefficient in waste gas;
3) the vehicle-mounted T-BOX reads the running data stored in the vehicle electronic control unit and uploads the running data to the vehicle electronic control unit database at the cloud end;
4) the manufacturer of the automobile electronic control unit calculates according to the running data of the automobile electronic control unit of the vehicle in the automobile electronic control unit database at the cloud end, and obtains the calibration parameters matched with the optimal performance of the vehicle as follows:
calibrating the oil injection end time, calibrating a load model, calibrating the oil injection quantity, calibrating the ignition advance angle, knocking control matching, hot vehicle performance matching, starting idle speed matching, emission matching, drivability matching, and matching an OBD diagnosis function and a monitoring function;
5) a manufacturer of the automobile electronic control unit uploads the calibration parameters to an automobile electronic control unit database at the cloud end for storage, and sends a parameter modification instruction to the automobile electronic control unit of the vehicle through the cloud end;
6) after receiving a parameter modification instruction sent by a cloud terminal, an on-board T-BOX of a vehicle receives a calibration parameter of a manufacturer of an automotive electronic control unit; and then storing the received calibration parameters into the automobile electronic control unit, covering the previous parameters of the automobile electronic control unit, adjusting the automobile to the optimal performance matching state, and realizing remote maintenance on the automobile electronic control unit.
2. The method of claim 1, wherein: and the vehicle-mounted T-BOX in the step 3) transmits data with the vehicle electronic control unit through a CAN bus.
3. The method of claim 1, wherein: and the vehicle-mounted T-BOX in the step 3) transmits data with the vehicle electronic control unit through Bluetooth.
4. The method of claim 1, wherein: the automobile electronic control unit in the step 6) sends out control signals to various actuators of the automobile according to the calibration parameters calculated by the manufacturer of the automobile electronic control unit so as to adjust the automobile to the optimal performance matching state.
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| CN201910586597.5A CN110300041B (en) | 2019-07-01 | 2019-07-01 | Cloud-based remote maintenance method for automobile electronic control unit |
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| CN110824982A (en) * | 2019-10-23 | 2020-02-21 | 武汉光庭信息技术股份有限公司 | ECU remote debugging method, server and storage medium |
| CN110825073A (en) * | 2019-11-29 | 2020-02-21 | 安徽江淮汽车集团股份有限公司 | Engine remote calibration system and method |
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