CN109900482A - A kind of research and development of special vehicle and detection service system - Google Patents
A kind of research and development of special vehicle and detection service system Download PDFInfo
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Abstract
The present invention provides a kind of research and development of special vehicle and detection service systems, including special vehicle engine detection subsystem, special vehicle gearbox and power assembly detection subsystem and special vehicle to design service subsystem；The special vehicle engine detection subsystem is for each performance indicator of engine in testing；The special vehicle gearbox and power assembly detection subsystem are verified for power assembly vehicle steady state test and dynamic test；The special vehicle design service subsystem is for generating examining report after acquisition testing data, level of confidentiality processing is carried out to examining report, disparate databases storage is divided into after examining report circulation by level of confidentiality processing, designer carries out specific aim improvement by consulting the examining report of disparate databases.Compared with prior art, special vehicle research and development provided by the invention and detection service system carry out precise measurement to each measurement parameter of special vehicle engine, speed changer and power assembly, and the examining report of generation is stored to special vehicle and designs service subsystem.
Description
Technical Field
The invention relates to the field of automobiles, in particular to a special vehicle research and development and detection service system.
Background
The automobile part manufacturing industry in China still mainly adopts the traditional design and manufacturing mode, and the integration depth of informatization and industrialization is very limited. The development is far lagged behind the development of the whole vehicle technology, although the output value scale of the part industry is large, the medium-sized and small enterprises are more, the industrial concentration is low, the innovation capability is weak, and the development investment is insufficient. The synchronous research and development and even advanced research and development of the part products relative to the whole automobile are important guarantees of technical innovation of the automobile industry, and the development of the automobile part industry is the basis of the automobile industry in China which is greatly enhanced.
Special vehicles are special-purpose vehicles with dimensions, weights, etc. exceeding the design limits of the vehicle, which are specially made or modified, equipped with fixed equipment, and the main function of which is not for motor vehicles carrying people or goods. Compared with standard vehicles, special vehicles have higher requirements on the stability of an engine and a gearbox and the fuel economy due to special service. Therefore, in order to meet the development requirements, various test and assessment tasks need to be completed, the tests require manual operation, the difficulty is high, the control cost is high, the hidden danger of manual operation errors is increased, and an effective solution is not provided at present.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a special vehicle research and development and detection service system to meet the special requirements of the special vehicle on an engine and a gearbox.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
a special vehicle research and development and detection service system comprises a special vehicle engine detection subsystem, a special vehicle gearbox and power assembly detection subsystem and a special vehicle design service subsystem;
the special vehicle engine detection subsystem is used for controlling the temperature of engine cooling liquid and engine oil, the running speed of the engine in the test and completing the torque measurement, the oil consumption measurement, the engine emission measurement and the thermodynamic calibration of the engine;
the special vehicle gearbox and power assembly detection subsystem is used for power assembly vehicle steady-state test and dynamic test verification;
the special vehicle design service subsystem is used for generating a detection report after collecting detection data, performing security classification processing on the detection report, dividing the detection report subjected to security classification processing into different databases for storage after circulation, and performing targeted improvement by a designer by looking up the detection reports of the different databases;
the special vehicle engine detection subsystem comprises an engine performance test bench module, an engine combustion analysis module, an engine direct-sampling emission analysis module and an engine test bench calibration module;
the engine performance test stand module is used for carrying out torque measurement, engine oil consumption measurement and pressure and temperature measurement of the special vehicle engine, and complete machine sound power test and evaluation, complete machine vibration intensity test and evaluation, crankshaft torsional vibration test analysis, noise source identification and sequencing, vibration and noise reduction measure verification test, noise sound quality test, evaluation and optimization of the special vehicle engine;
the engine combustion analysis module is used for testing the control precision of the processes of fuel injection, mixing and combustion of the air inlet, the spraying and the combustion chamber of the special vehicle engine;
the engine direct-collecting emission analysis module is used for analyzing the emission of the direct-exhaust tail gas of the special vehicle engine;
the engine test bench calibration module is used for calibrating SA loss, AF loss, EOIT, Throttle Flow, VVT opening selection, ignition angle, temperature model, correction torque model, VE model and KNOCK of the engine of the special vehicle.
Preferably, the engine performance test bench module and the engine test bench calibration module both comprise a bench, a bench damping system, a data acquisition system and a temperature control system, wherein the bench is provided with a power measurement unit, a torque and rotation speed measurement unit, an accelerator opening measurement unit, an oil consumption measurement unit, an emergency stop device and a power supply device;
the power measuring unit is used for measuring the power of the automobile engine, the torque and rotating speed measuring unit is used for measuring the torque and rotating speed of the automobile engine, the accelerator opening measuring unit is used for measuring the accelerator opening of the automobile engine, and the oil consumption measuring unit is used for measuring the oil consumption of the automobile engine;
the emergency stop device is used for emergency stop, the power supply device supplies power to the engine performance test bed frame module, the engine NVH performance test bed frame module and the engine reliability test bed frame module, the bed damping system is used for bed damping, the data acquisition system is used for data acquisition of each measurement unit, and the temperature control system is used for controlling the temperature of each measurement unit;
and the power measuring unit, the torque and rotating speed measuring unit, the accelerator opening measuring unit and the oil consumption measuring unit transmit measured data to the data acquisition system.
Preferably, the engine combustion analysis module comprises an engine combustion analyzer.
Preferably, the special vehicle development and detection service system further comprises a detection control module,
the detection unit is used for acquiring measurement data in the test channels of the test bench modules;
the imaging unit is used for acquiring images and serial numbers of the power assembly to be measured;
the communication unit is used for sending the acquired measurement data, the acquired images and the acquired serial numbers to the data processing unit;
and the data processing unit is used for generating a powertrain evaluation report from the received data.
Preferably, the engine direct collection and emission analysis module comprises an engine single-path direct collection and emission analyzer and an engine double-path direct collection and emission analyzer.
Preferably, the special vehicle gearbox and power assembly detection subsystem comprises a power assembly driving test bench rack module, a road simulation test bench rack module and a dynamic development test bench rack module;
the power assembly driving test bench module is used for steady-state test and dynamic test of the special vehicle power assembly driving;
the road simulation test bench rack module is used for a special vehicle power assembly driving energy recovery test, a power performance test, a special vehicle whole vehicle circulation condition simulation test and a driver characteristic test (acceleration, deceleration, parking, economical driving, sporty driving and the like);
the dynamic development test bench frame module is used for HCU control strategy development test, HCU control system calibration test, energy distribution and recovery strategy development and calibration test, power assembly calibration test and dynamic development test of an automatic transmission and an electromechanical coupling device.
Preferably, the special vehicle engine detection subsystem, the special vehicle gearbox and the powertrain detection subsystem are all provided with an image shooting unit and a transmission unit; the image shooting unit is used for collecting images and numbers of an engine, a transmission or a power assembly of the special vehicle to be tested, and the transmission unit is used for sending the images or the images collected by the image shooting unit to the special vehicle design service subsystem.
Preferably, the special vehicle design service subsystem is formed by connecting a test sensor, a human-computer interaction communication terminal, a mobile communication network, a special vehicle information server and a 3D printing terminal; wherein,
the test sensors are positioned in the test channels of the test stand modules and used for acquiring the detection data of the engine, the gearbox and the power assembly of the special vehicle;
the man-machine interactive communication terminal generates a special vehicle state detection report by detecting state information of the special vehicle acquired by the test sensor, performs security classification processing on the detection report, and divides the detection report after the security classification processing into different databases of the special vehicle information server for storage;
the mobile communication network is connected and communicated with the man-machine interactive communication terminal and the special vehicle information server in a wired mode or a short-distance wireless mode and is used for sending the special vehicle state detection report to the special vehicle information server;
the special vehicle information server is connected with the 3D printing terminal and used for obtaining a detection report of the state of the special vehicle, and a designer analyzes detection report data by looking up the detection reports of different databases, adjusts a design idea and inputs an improvement instruction to perform 3D printing;
the 3D printing terminal is connected with the special vehicle engine detection subsystem, the special vehicle gearbox and the power assembly detection subsystem and used for automatically detecting states of the special vehicle engine, the gearbox and the power assembly designed by a designer.
More preferably, the special vehicle information server comprises a first sub information server and a second sub information server, the first sub information server and the second sub information server are respectively provided with a plurality of security databases, the first sub information server is physically isolated, the other sub information server is connected with the mobile communication network, and after the first sub information server of the special vehicle information server is matched with detection reports, images and number information of an engine, a transmission or a power assembly of the special vehicle, the detection reports matched with the security degrees are transferred to different security databases through a preset program.
Further, the second sub information server is respectively connected with the mobile communication network and the 3D printing terminal, and designers access different security databases of the second sub information server through remote login to look up detection reports, images and serial number information of the engine, the transmission or the power assembly of the special vehicle.
More preferably, each detection subsystem is provided with a control unit and an emergency stop device connected with the control unit, and the man-machine interactive communication terminal can finish the detection of the special vehicle, the transmission and the power assembly through the control unit, automatically record after finishing the detection, and select the detection of newly added equipment during the next detection or continue to finish the detection.
Compared with the prior art, the special vehicle research and development and detection service system provided by the invention can be used for accurately measuring various measurement parameters of the special vehicle engine, the transmission and the power assembly, storing the generated detection report into the special vehicle design service subsystem, and enabling a designer to log in a sub-information server of the special vehicle design service subsystem to look up the detection report of the special vehicle engine, the transmission and the power assembly on line; in addition, unqualified products or the existing structure of the unqualified products are improved, the arranged 3D printing terminal can be used for directly designing the automobile motor, the state detection of the improved products is rapidly carried out, the functions of 3D scanning, industrial design, reverse engineering, entity presentation and the like are included, the assistance is provided for automobile manufacturing enterprises, the transition from the traditional manufacturing mode to modernization and digital manufacturing is accelerated, the modernization of the traditional product design method is promoted, and the core competitiveness of the products is improved.
Drawings
Fig. 1 is a topological diagram of a special vehicle research and development and detection service system according to an embodiment of the present invention.
Detailed Description
In order to more clearly describe the technical contents of the present invention, the following further description is given in conjunction with specific embodiments.
The invention provides a special vehicle research and development and detection service system, which comprises a special vehicle engine detection subsystem, a special vehicle gearbox and power assembly detection subsystem and a special vehicle design service subsystem, wherein the special vehicle engine detection subsystem comprises a vehicle engine detection subsystem, a vehicle transmission and power assembly detection subsystem and a vehicle engine detection subsystem;
the special vehicle engine detection subsystem is used for controlling the temperature of engine cooling liquid and engine oil, the running speed of the engine in the test and completing the torque measurement, the oil consumption measurement, the engine emission measurement and the thermodynamic calibration of the engine;
the special vehicle gearbox and power assembly detection subsystem is used for power assembly vehicle steady-state test and dynamic test verification;
the special vehicle design service subsystem is used for generating a detection report after collecting detection data, performing security classification processing on the detection report, dividing the detection report subjected to security classification processing into different databases for storage after circulation, and performing targeted improvement by a designer by looking up the detection reports of the different databases;
the special vehicle engine detection subsystem comprises an engine performance test bench module, an engine combustion analysis module, an engine direct-sampling emission analysis module and an engine test bench calibration module;
the engine performance test stand module is used for carrying out torque measurement, engine oil consumption measurement and pressure and temperature measurement of the special vehicle engine, and complete machine sound power test and evaluation, complete machine vibration intensity test and evaluation, crankshaft torsional vibration test analysis, noise source identification and sequencing, vibration and noise reduction measure verification test, noise sound quality test, evaluation and optimization of the special vehicle engine;
the engine combustion analysis module is used for testing the control precision of the processes of fuel injection, mixing and combustion of the air inlet, the spraying and the combustion chamber of the special vehicle engine;
the engine direct-collecting emission analysis module is used for analyzing the emission of the direct-exhaust tail gas of the special vehicle engine;
the engine test bench calibration module is used for calibrating SA loss, AF loss, EOIT, Throttle Flow, VVT opening selection, ignition angle, temperature model, correction torque model, VE model and KNOCK of the engine of the special vehicle.
In this embodiment, the engine performance test bench module and the engine test bench calibration module both include a bench, a bench damping system, a data acquisition system and a temperature control system, and the bench is provided with a power measurement unit, a torque and rotation speed measurement unit, an accelerator opening measurement unit, an oil consumption measurement unit, an emergency stop device and a power supply device;
the power measuring unit is used for measuring the power of the automobile engine, the torque and rotating speed measuring unit is used for measuring the torque and rotating speed of the automobile engine, the accelerator opening measuring unit is used for measuring the accelerator opening of the automobile engine, and the oil consumption measuring unit is used for measuring the oil consumption of the automobile engine;
the emergency stop device is used for emergency stop, the power supply device supplies power to the engine performance test bed frame module, the engine NVH performance test bed frame module and the engine reliability test bed frame module, the bed damping system is used for bed damping, the data acquisition system is used for data acquisition of each measurement unit, and the temperature control system is used for controlling the temperature of each measurement unit;
and the power measuring unit, the torque and rotating speed measuring unit, the accelerator opening measuring unit and the oil consumption measuring unit transmit measured data to the data acquisition system.
In this embodiment, the engine combustion analysis module includes an engine combustion analyzer.
In this embodiment, the engine direct sampling and emission analysis module includes an engine single-path direct sampling and emission analyzer and an engine double-path direct sampling and emission analyzer.
In this embodiment, the special vehicle development and detection service system further includes a detection control module including,
the detection unit is used for acquiring measurement data in the test channels of the test bench modules;
the imaging unit is used for acquiring images and serial numbers of the power assembly to be measured;
the communication unit is used for sending the acquired measurement data, the acquired images and the acquired serial numbers to the data processing unit;
and the data processing unit is used for generating a powertrain evaluation report from the received data.
In this embodiment, the special vehicle transmission and powertrain detection subsystem includes a powertrain driving test bed rack module, a road simulation test bed rack module and a dynamic development test bed rack module;
the power assembly driving test bench module is used for steady-state test and dynamic test of the special vehicle power assembly driving;
the road simulation test bench rack module is used for a special vehicle power assembly driving energy recovery test, a power performance test, a special vehicle whole vehicle circulation condition simulation test and a driver characteristic test (acceleration, deceleration, parking, economical driving, sporty driving and the like);
the dynamic development test bench frame module is used for HCU control strategy development test, HCU control system calibration test, energy distribution and recovery strategy development and calibration test, power assembly calibration test and dynamic development test of an automatic transmission and an electromechanical coupling device.
In the embodiment, the special vehicle engine detection subsystem, the special vehicle gearbox and the power assembly detection subsystem are all provided with an image shooting unit and a transmission unit; the image shooting unit is used for collecting images and numbers of an engine, a transmission or a power assembly of the special vehicle to be tested, and the transmission unit is used for sending the images or the images collected by the image shooting unit to the special vehicle design service subsystem.
In the embodiment, the special vehicle design service subsystem is formed by connecting a test sensor, a man-machine interactive communication terminal, a mobile communication network, a special vehicle information server and a 3D printing terminal; wherein,
the test sensors are positioned in the test channels of the test stand modules and used for acquiring the detection data of the engine, the gearbox and the power assembly of the special vehicle;
the man-machine interactive communication terminal generates a special vehicle state detection report by detecting state information of the special vehicle acquired by the test sensor, performs security classification processing on the detection report, and divides the detection report after the security classification processing into different databases of the special vehicle information server for storage;
the mobile communication network is connected and communicated with the man-machine interactive communication terminal and the special vehicle information server in a wired mode or a short-distance wireless mode and is used for sending the special vehicle state detection report to the special vehicle information server;
the special vehicle information server is connected with the 3D printing terminal and used for obtaining a detection report of the state of the special vehicle, and a designer analyzes detection report data by looking up the detection reports of different databases, adjusts a design idea and inputs an improvement instruction to perform 3D printing;
the 3D printing terminal is connected with the special vehicle engine detection subsystem, the special vehicle gearbox and the power assembly detection subsystem and used for automatically detecting states of the special vehicle engine, the gearbox and the power assembly designed by a designer.
In this embodiment, the special vehicle information server includes a first sub information server and a second sub information server, the first and second sub information servers are respectively provided with a plurality of security databases, the first sub information server is physically isolated, the other sub information server is connected to the mobile communication network, and after the first sub information server of the special vehicle information server matches detection reports, images and serial number information of an engine, a transmission or a power assembly of the special vehicle, the detection reports of matching security degrees are transferred to different security databases through a preset program.
In this embodiment, the second sub information server is connected to the mobile communication network and the 3D printing terminal, and a designer accesses different security databases of the second sub information server through remote login to search the detection report, the image and the serial number information of the engine, the transmission or the powertrain of the special vehicle.
In this embodiment, each detection subsystem is provided with a control unit and an emergency stop device connected with the control unit, and the man-machine interactive communication terminal can finish the detection of the special vehicle, the transmission and the power assembly through the control unit, automatically record after the detection is finished, and select the detection of a newly added device during the next detection or continue to finish the detection.
In this specification, the invention has been described with reference to specific embodiments thereof. It will, however, be evident that various modifications and changes may be made thereto without departing from the broader spirit and scope of the invention. The specification and drawings are, accordingly, to be regarded in an illustrative rather than a restrictive sense.
Claims (10)
1. A special vehicle research and development and detection service system is characterized in that: the system comprises a special vehicle engine detection subsystem, a special vehicle gearbox and power assembly detection subsystem and a special vehicle design service subsystem;
the special vehicle engine detection subsystem is used for controlling the temperature of engine cooling liquid and engine oil, the running speed of the engine in the test and completing the torque measurement, the oil consumption measurement, the engine emission measurement and the thermodynamic calibration of the engine;
the special vehicle gearbox and power assembly detection subsystem is used for power assembly vehicle steady-state test and dynamic test verification;
the special vehicle design service subsystem is used for generating a detection report after collecting detection data, performing security classification processing on the detection report, dividing the detection report subjected to security classification processing into different databases for storage after circulation, and performing targeted improvement by a designer by looking up the detection reports of the different databases;
the special vehicle engine detection subsystem comprises an engine performance test bench module, an engine combustion analysis module, an engine direct-sampling emission analysis module and an engine test bench calibration module;
the engine performance test stand module is used for carrying out torque measurement, engine oil consumption measurement and pressure and temperature measurement of the special vehicle engine, and complete machine sound power test and evaluation, complete machine vibration intensity test and evaluation, crankshaft torsional vibration test analysis, noise source identification and sequencing, vibration and noise reduction measure verification test, noise sound quality test, evaluation and optimization of the special vehicle engine;
the engine combustion analysis module is used for testing the control precision of the processes of fuel injection, mixing and combustion of the air inlet, the spraying and the combustion chamber of the special vehicle engine;
the engine direct-collecting emission analysis module is used for analyzing the emission of the direct-exhaust tail gas of the special vehicle engine;
the engine test bench calibration module is used for calibrating SA loss, AF loss, EOIT, Throttle Flow, VVT opening selection, ignition angle, temperature model, correction torque model, VE model and KNOCK of the engine of the special vehicle.
2. The special vehicle development and detection service system of claim 1, wherein: the engine performance test bench module and the engine test bench calibration module respectively comprise a bench, a bench damping system, a data acquisition system and a temperature control system, wherein a power measurement unit, a torque and rotating speed measurement unit, an accelerator opening measurement unit, an oil consumption measurement unit, an emergency stop device and a power supply device are arranged on the bench;
the power measuring unit is used for measuring the power of the automobile engine, the torque and rotating speed measuring unit is used for measuring the torque and rotating speed of the automobile engine, the accelerator opening measuring unit is used for measuring the accelerator opening of the automobile engine, and the oil consumption measuring unit is used for measuring the oil consumption of the automobile engine;
the emergency stop device is used for emergency stop, the power supply device supplies power to the engine performance test bed frame module, the engine NVH performance test bed frame module and the engine reliability test bed frame module, the bed damping system is used for bed damping, the data acquisition system is used for data acquisition of each measurement unit, and the temperature control system is used for controlling the temperature of each measurement unit;
and the power measuring unit, the torque and rotating speed measuring unit, the accelerator opening measuring unit and the oil consumption measuring unit transmit measured data to the data acquisition system.
3. The special vehicle development and detection service system of claim 1, wherein: the special vehicle development and detection service system also comprises a detection control module,
the detection unit is used for acquiring measurement data in the test channels of the test bench modules;
the imaging unit is used for acquiring images and serial numbers of the power assembly to be measured;
the communication unit is used for sending the acquired measurement data, the acquired images and the acquired serial numbers to the data processing unit;
and the data processing unit is used for generating a powertrain evaluation report from the received data.
4. The special vehicle development and detection service system of claim 1, wherein: the engine direct-sampling emission analysis module comprises an engine single-path direct-sampling emission analyzer and an engine double-path direct-sampling emission analyzer.
5. The special vehicle development and detection service system of claim 1, wherein: the special vehicle gearbox and power assembly detection subsystem comprises a power assembly driving test bench rack module, a road simulation test bench rack module and a dynamic development test bench rack module;
the power assembly driving test bench module is used for steady-state test and dynamic test of the special vehicle power assembly driving;
the road simulation test bench rack module is used for a special vehicle power assembly driving energy recovery test, a power performance test, a whole vehicle circulation condition simulation test and a driver characteristic test of the special vehicle;
the dynamic development test bench frame module is used for HCU control strategy development test, HCU control system calibration test, energy distribution and recovery strategy development and calibration test, power assembly calibration test and dynamic development test of an automatic transmission and an electromechanical coupling device.
6. The special vehicle development and detection service system of claim 1, wherein: the special vehicle engine detection subsystem, the special vehicle gearbox and the power assembly detection subsystem are all provided with an image shooting unit and a transmission unit; the image shooting unit is used for collecting images and numbers of an engine, a transmission or a power assembly of the special vehicle to be tested, and the transmission unit is used for sending the images or the images collected by the image shooting unit to the special vehicle design service subsystem.
7. The special vehicle development and detection service system of claim 1, wherein: the special vehicle design service subsystem is formed by connecting a test sensor, a man-machine interactive communication terminal, a mobile communication network, a special vehicle information server and a 3D printing terminal; wherein,
the test sensors are positioned in the test channels of the test stand modules and used for acquiring the detection data of the engine, the gearbox and the power assembly of the special vehicle;
the man-machine interactive communication terminal generates a special vehicle state detection report by detecting state information of the special vehicle acquired by the test sensor, performs security classification processing on the detection report, and divides the detection report after the security classification processing into different databases of the special vehicle information server for storage;
the mobile communication network is connected and communicated with the man-machine interactive communication terminal and the special vehicle information server in a wired mode or a short-distance wireless mode and is used for sending the special vehicle state detection report to the special vehicle information server;
the special vehicle information server is connected with the 3D printing terminal and used for obtaining a detection report of the state of the special vehicle, and a designer analyzes detection report data by looking up the detection reports of different databases, adjusts a design idea and inputs an improvement instruction to perform 3D printing;
the 3D printing terminal is connected with the special vehicle engine detection subsystem, the special vehicle gearbox and the power assembly detection subsystem and used for automatically detecting states of the special vehicle engine, the gearbox and the power assembly designed by a designer.
8. The special vehicle development and detection service system of claim 7, wherein: the special vehicle information server comprises a first sub information server and a second sub information server, wherein the first sub information server and the second sub information server are respectively provided with a plurality of security level databases, the first sub information server is physically isolated, the other sub information server is connected with a mobile communication network, and after the first sub information server of the special vehicle information server is matched with detection reports, images and serial number information of an engine, a transmission or a power assembly of a special vehicle, the detection reports matched with the security level degrees are transferred to different security level databases through a preset program.
9. The special vehicle development and detection service system of claim 8, wherein: the second sub information server is respectively connected with the mobile communication network and the 3D printing terminal, and designers access different security databases of the second sub information server through remote login to look up detection reports, images and serial number information of the engine, the transmission or the power assembly of the special vehicle.
10. The special vehicle development and detection service system of claim 7, wherein: each detection subsystem is provided with a control unit and an emergency stop device connected with the control unit, and the man-machine interactive communication terminal can finish the detection of the special vehicle, the transmission and the power assembly through the control unit, automatically record after finishing the detection, and select the detection of newly added equipment during the next detection or continue to finish the detection.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110588630A (en) * | 2019-08-29 | 2019-12-20 | 北京航天发射技术研究所 | Energy distribution control method and device for electromechanical composite driving system |
| CN112213109A (en) * | 2020-09-16 | 2021-01-12 | 哈尔滨东安汽车发动机制造有限公司 | Initial phase test method for variable valve timing system of engine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110588630A (en) * | 2019-08-29 | 2019-12-20 | 北京航天发射技术研究所 | Energy distribution control method and device for electromechanical composite driving system |
| CN110588630B (en) * | 2019-08-29 | 2020-10-16 | 北京航天发射技术研究所 | Energy distribution control method and device for electromechanical composite driving system |
| CN112213109A (en) * | 2020-09-16 | 2021-01-12 | 哈尔滨东安汽车发动机制造有限公司 | Initial phase test method for variable valve timing system of engine |
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Application publication date: 20190618 |