CN113074937B - Gearbox testing system and method - Google Patents
Gearbox testing system and method Download PDFInfo
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- CN113074937B CN113074937B CN202110358870.6A CN202110358870A CN113074937B CN 113074937 B CN113074937 B CN 113074937B CN 202110358870 A CN202110358870 A CN 202110358870A CN 113074937 B CN113074937 B CN 113074937B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/025—Test-benches with rotational drive means and loading means; Load or drive simulation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
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Abstract
The invention discloses a gearbox testing system and a gearbox testing method, wherein a bench device is used for receiving a testing instruction sent by an upper computer and controlling the operation of a gearbox, an engine and a load motor according to the testing instruction; acquiring gearbox parameters of a gearbox and engine parameters of an engine when the gearbox, the engine and a load motor run through sensors; the gearbox parameter and the engine parameter acquired by the sensor are acquired by the NI acquisition device, and then the gearbox parameter and the engine parameter are uploaded to the upper computer through the CAN bus, so that the upper computer determines a gearbox test result according to the gearbox parameter, the engine parameter and a test instruction sent by the upper computer, the gearbox is tested under different driving working conditions, and the technical problem that uncontrollable factors exist in gearbox debugging work is solved.
Description
Technical Field
The invention relates to the field of automobile testing, in particular to a gearbox testing system and method.
Background
At present, under the condition that an engine, a finished automobile, various electric appliances, peripheral accessories, a software control algorithm and the like are complete, in order to achieve good finished automobile performance, meet national standards and enterprise standards, meet customer requirements and strive for better drivability, the work of finished automobile calibration is generally required to be completed. When the whole vehicle is calibrated, an important work, namely the debugging work of the software of the gearbox, is required to be carried out before the gearbox meets the requirement of delivering the whole vehicle, and the aim of optimal control of the gearbox is fulfilled by optimizing the software data.
The debugging work of the traditional gearbox software is carried out on the whole vehicle, but the debugging and verification of the whole vehicle have the problems of uncontrollable factors of road and environment working conditions, poor repeatability of driving operation, incapability of guaranteeing the debugging fineness, long debugging period and the like.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide a gearbox testing system and a gearbox testing method, and aims to solve the technical problems of how to eliminate uncontrollable factors and solve gearbox debugging.
To achieve the above object, the present invention provides a transmission testing system, comprising:
the device comprises a supporting tool, a rack device, a plurality of sensors and an NI collector;
the supporting tool is used for placing a gearbox and an engine of a vehicle to be tested, and the sensor is arranged at a preset position of the gearbox and the engine;
the rack equipment is used for placing a load motor, receiving a test instruction sent by the upper computer and controlling the transmission case, the engine and the load motor to operate according to the test instruction;
the sensor is used for acquiring gearbox parameters of the gearbox and engine parameters of the engine when the gearbox, the engine and the load motor run;
the NI collector is used for acquiring the gearbox parameters and the engine parameters collected by the sensor;
the NI collector is further used for uploading the gearbox parameters and the engine parameters to the upper computer through a CAN bus, so that the upper computer CAN determine gearbox test results according to the gearbox parameters, the engine parameters and test instructions sent by the upper computer.
Preferably, the sensor comprises: an acceleration sensor, the transmission parameter comprising a vibration acceleration signal;
the acceleration sensor is arranged on a shell of the gearbox and used for collecting the vibration acceleration signals and sending the vibration acceleration signals to the NI collector.
Preferably, the sensor comprises: engine water pressure sensor, engine vent-pipe pressure sensor and engine fuel pressure sensor, the engine parameter includes: an engine inlet/outlet water pressure signal, an engine fuel pressure signal, and an engine exhaust pipe pressure signal;
the engine water pressure sensor is arranged on a water inlet pipe and a water outlet pipe of the engine and is used for collecting water inlet/outlet pressure signals of the engine and sending the water inlet/outlet pressure signals of the engine to the NI collector;
the engine exhaust pipe pressure sensor is arranged on an exhaust pipe of the engine and used for acquiring an engine exhaust pipe pressure signal and sending the engine exhaust pipe pressure signal to the NI collector;
the engine fuel pressure sensor is arranged on a fuel pipe of the engine and used for collecting an engine fuel pressure signal and sending the engine fuel pressure signal to the NI collector.
Preferably, the sensor comprises: the engine water temperature sensor, engine exhaust pipe temperature sensor and engine fuel temperature sensor, the engine parameter includes: engine inlet/outlet water temperature signal, engine exhaust pipe temperature signal and engine fuel temperature signal
The engine water temperature sensor is arranged on a water inlet pipe and a water outlet pipe of the engine and used for acquiring water inlet temperature signals and water outlet temperature signals of the engine and sending the water inlet temperature signals and the water outlet temperature signals of the engine to the NI collector;
the engine exhaust pipe temperature sensor is arranged on an exhaust pipe of the engine and used for acquiring an engine exhaust pipe temperature signal and sending the engine exhaust pipe temperature signal to the NI collector;
the engine fuel temperature sensor is arranged on a fuel pipe of the engine and used for collecting the engine fuel temperature signal and sending the engine fuel temperature signal to the NI collector.
Preferably, the rack equipment is further used for collecting key parameters under different vehicle running conditions through a CAN bus and uploading the key parameters to the upper computer, so that the upper computer evaluates the gearbox test according to the key parameters;
wherein, the vehicle operating mode includes: the method comprises the following steps of (1) carrying out creep working conditions, creep switching working conditions, starting working conditions and gear shifting working conditions;
the key parameters include: the control system comprises a gear shifting handle signal, a brake percentage signal, a vehicle speed signal, a vehicle resistance analog signal, a gearbox oil temperature signal, an engine rotating speed signal, an engine torque signal, a wheel speed signal and an accelerator percentage signal.
The rack equipment is also used for acquiring a brake percentage signal, a gear shifting handle signal, a vehicle speed signal, a vehicle resistance signal and a gearbox oil temperature signal under the creeping working condition;
the rack equipment is also used for sending the brake percentage signal, the gear shifting handle signal, the vehicle speed signal, the vehicle resistance signal and the gearbox oil temperature signal to an upper computer, so that the upper computer evaluates the creeping working condition according to the brake percentage signal, the gear shifting handle signal, the vehicle speed signal, the vehicle resistance signal and the gearbox oil temperature signal.
Preferably, the rack equipment is also used for acquiring a gear shifting handle signal, a brake percentage signal, a vehicle speed signal, a vehicle resistance simulation signal and a gearbox oil temperature signal under a peristaltic switching working condition;
the rack equipment is also used for sending the brake percentage signal, the gear shifting handle signal, the vehicle speed signal, the vehicle resistance signal and the gearbox oil temperature signal to an upper computer, so that the upper computer evaluates the creep switching working condition according to the brake percentage signal, the gear shifting handle signal, the vehicle speed signal, the vehicle resistance signal and the gearbox oil temperature signal.
Preferably, the rack equipment is further used for collecting a gear shifting handle signal, a brake percentage signal, a vehicle speed signal, a vehicle resistance simulation signal, a gearbox oil temperature signal and an engine rotating speed signal under a starting working condition;
the rack equipment is also used for sending the brake percentage signal, the gear shifting handle signal, the vehicle speed signal, the vehicle resistance signal, the gearbox oil temperature signal and the engine rotating speed signal to an upper computer, so that the upper computer evaluates the starting working condition according to the brake percentage signal, the gear shifting handle signal, the vehicle speed signal, the vehicle resistance signal, the gearbox oil temperature signal and the engine rotating speed signal.
Preferably, the rack equipment is further used for acquiring a gear shifting handle signal, a brake percentage signal, a vehicle speed signal, a vehicle resistance simulation signal, a gearbox oil temperature signal, an engine rotating speed signal, an engine torque signal and a wheel speed signal under the gear shifting working condition;
the rack equipment is also used for sending the gear shifting handle signal, the brake percentage signal, the vehicle speed signal, the vehicle resistance analog signal, the gearbox oil temperature signal, the engine rotating speed signal, the engine torque signal and the wheel speed signal to an upper computer under the gear shifting working condition, so that the upper computer evaluates the gear shifting working condition according to the gear shifting handle signal, the brake percentage signal, the vehicle speed signal, the vehicle resistance analog signal, the gearbox oil temperature signal, the engine rotating speed signal, the engine torque signal and the wheel speed signal.
Further, in order to achieve the above object, the present invention further provides a transmission testing method, which is applied to a transmission testing system, and the method includes:
the rack equipment receives a test instruction sent by the upper computer and controls the gearbox, the engine and the load motor to operate according to the test instruction;
the sensor collects gearbox parameters of the gearbox and engine parameters of the engine when the gearbox, the engine and the load motor run;
the NI collector is used for acquiring the gearbox parameters and the engine parameters collected by the sensor;
the NI collector uploads the gearbox parameters and the engine parameters to the upper computer through a CAN bus, so that the upper computer determines gearbox test results according to the gearbox parameters, the engine parameters and test instructions sent by the upper computer.
According to the invention, the bench equipment is used for receiving a test instruction sent by an upper computer, and controlling the operation of the gearbox, the engine and the load motor according to the test instruction; acquiring gearbox parameters of a gearbox and engine parameters of an engine when the gearbox, the engine and a load motor run through sensors; the gearbox parameter and the engine parameter acquired by the sensor are acquired by the NI acquisition device and then uploaded to the upper computer through the CAN bus, so that the upper computer determines a gearbox test result according to the gearbox parameter, the engine parameter and a test instruction sent by the upper computer, the gearbox is tested under different driving conditions, and the technical problem that uncontrollable factors exist in the debugging work of the gearbox is solved.
Drawings
FIG. 1 is a block diagram of a first embodiment of a transmission testing system according to the present invention;
FIG. 2 is a schematic flow diagram of an NI collector in a first embodiment of a transmission testing method of the present invention;
FIG. 3 is a schematic view of a work flow in a support tool according to a first embodiment of a transmission testing method of the present invention;
fig. 4 is a schematic flow chart of a second embodiment of a transmission testing method of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, fig. 1 is a block diagram of a first embodiment of a transmission testing system according to the present invention. The gearbox testing system comprises: support fixture 10, gantry apparatus 20, sensor 30, and NI collector 40.
The supporting tool 10 is used for placing a gearbox and an engine of a vehicle to be tested, and the sensors are arranged at preset positions of the gearbox and the engine;
it is understood that a gearbox is a mechanism for changing the speed and torque from the engine, which can change the transmission ratio of the output shaft to the input shaft in fixed or stepped manner, and may also be referred to as a variator, which consists of a variator and an operating mechanism, and some vehicles also have a power take-off. The transmission mechanism is mainly driven by common gears and also driven by planetary gears. The common gear transmission mechanism generally uses a sliding gear, a synchronizer and the like.
It should be noted that an Engine (Engine) is a machine capable of converting other forms of energy into mechanical energy, and includes, for example, an internal combustion Engine (reciprocating piston Engine), an external combustion Engine (stirling Engine, steam Engine, etc.), a jet Engine, an electric motor, etc. Such as internal combustion engines, typically convert chemical energy into mechanical energy. The engine is suitable for a power generation device, and can also refer to the whole machine (such as a gasoline engine and an aircraft engine) comprising the power device. Engines were first introduced in the united kingdom, and the engine concept is also derived from english, which is meant in its meaning as "power generating machinery".
It should be noted that the preset position is a position where the engine and the transmission are correspondingly installed after the normal vehicle is assembled.
The rack device 20 is used for placing a load motor, receiving a test instruction sent by the upper computer, and controlling the transmission case, the engine and the load motor to operate according to the test instruction.
It is understood that the load motor may be a motor having a load and brake function, and the embodiment is not limited thereto; an Electric machine (Electric machine) refers to an electromagnetic device that converts or transmits Electric energy according to the law of electromagnetic induction. The motor is represented by a letter M (old standard is represented by a letter D) in a circuit, the motor mainly plays a role of generating driving torque and serving as a power source of electrical appliances or various machines, and the generator is represented by a letter G in a circuit and mainly plays a role of converting mechanical energy into electric energy.
It should be noted that the rack device may be a test device with a test bench function, and the embodiment is not limited to this; the upper computer is a computer that can directly issue a control command, and is generally a PC/host computer, which is not limited in this embodiment.
It should be noted that the test instruction is a specific signal sent by the computer, and the test instruction is specifically an operation command of the load motor, for example: and controlling the running direction and speed of a rotor in the load motor.
In specific implementation, the receiving of the instruction sent by the upper computer is realized through a CAN; in conclusion, the CAN bus is mainly characterized in that the CAN is in a multi-master working mode, any node on the network CAN actively send information to other nodes at any time, master and slave are not required, and the mode is flexible; the CAN network nodes CAN arrange a priority order to meet and coordinate different real-time requirements of the CAN network nodes; by adopting a non-destructive bus arbitration technology, when the information is sent by multiple points at the same time, the communication is carried out according to the priority order, the bus conflict arbitration time is saved, and the network paralysis is avoided; the information can be transmitted in a point-to-point, point-to-multipoint and global broadcasting mode; the communication speed can reach up to 1M bps (within 40M), and the longest transmission distance reaches up to 10km (the speed is below 5 kbps); at present, the number of network nodes can reach 110, the message identifier is 2032 (CAN2.0A), and the message identifier in the extended standard (CAN2.0B) is almost not limited; the short frame data structure has short transmission time, strong anti-interference capability and good error detection effect; the communication medium may be twisted wire pairs, coaxial cable, or optical fiber; the network node can automatically close the output function under the condition of serious errors and is separated from the network; standardization and normalization (international standard ISO 11898) are realized.
Further, in order to simulate the environment of the vehicle under various driving conditions, the rack equipment is also used for collecting key parameters under different driving conditions of the vehicle through the CAN and uploading the key parameters to the upper computer, so that the upper computer evaluates the gearbox test according to the key parameters;
the vehicle running condition comprises: the method comprises the following steps of (1) carrying out creep working conditions, creep switching working conditions, starting working conditions and gear shifting working conditions; the key parameters include: the control system comprises a gear shifting handle signal, a brake percentage signal, a vehicle speed signal, a vehicle resistance analog signal, a gearbox oil temperature signal, an engine rotating speed signal, an engine torque signal, a wheel speed signal and an accelerator percentage signal.
Further, in order to simulate the environment of the vehicle under various driving conditions, the rack equipment is also used for collecting a brake percentage signal, a gear shifting handle signal, a vehicle speed signal, a vehicle resistance signal and a gearbox oil temperature signal under the creeping working condition; the rack equipment is also used for sending the brake percentage signal, the gear shifting handle signal, the vehicle speed signal, the vehicle resistance signal and the gearbox oil temperature signal to an upper computer, so that the upper computer evaluates the creeping working condition according to the brake percentage signal, the gear shifting handle signal, the vehicle speed signal, the vehicle resistance signal and the gearbox oil temperature signal.
Furthermore, in order to simulate the environment of the vehicle under various driving working conditions, the rack equipment is also used for collecting a gear shifting handle signal, a brake percentage signal, a vehicle speed signal, a vehicle resistance simulation signal and a gearbox oil temperature signal under a creeping switching working condition; the rack equipment is also used for sending the brake percentage signal, the gear shifting handle signal, the vehicle speed signal, the vehicle resistance signal and the gearbox oil temperature signal to an upper computer, so that the upper computer evaluates the creep switching working condition according to the brake percentage signal, the gear shifting handle signal, the vehicle speed signal, the vehicle resistance signal and the gearbox oil temperature signal.
Furthermore, in order to simulate the environment of the vehicle under various driving working conditions, the rack equipment is also used for collecting a gear shifting handle signal, a brake percentage signal, a vehicle speed signal, a vehicle resistance simulation signal, a gearbox oil temperature signal and an engine rotating speed signal under a starting working condition; the rack equipment is also used for sending the brake percentage signal, the gear shifting handle signal, the vehicle speed signal, the vehicle resistance signal, the gearbox oil temperature signal and the engine rotating speed signal to an upper computer, so that the upper computer evaluates the starting working condition according to the brake percentage signal, the gear shifting handle signal, the vehicle speed signal, the vehicle resistance signal, the gearbox oil temperature signal and the engine rotating speed signal.
Furthermore, in order to simulate the environment of the vehicle under various driving conditions, the bench device is also used for acquiring a gear shifting handle signal, a brake percentage signal, a vehicle speed signal, a vehicle resistance simulation signal, a gearbox oil temperature signal, an engine rotating speed signal, an engine torque signal and a wheel speed signal under the gear shifting condition; the rack equipment is further used for sending the gear shifting handle signal, the brake percentage signal, the vehicle speed signal, the vehicle resistance analog signal, the gearbox oil temperature signal, the engine rotating speed signal, the engine torque signal and the wheel speed signal to an upper computer under the gear shifting working condition, so that the upper computer evaluates the gear shifting working condition according to the gear shifting handle signal, the brake percentage signal, the vehicle speed signal, the vehicle resistance analog signal, the gearbox oil temperature signal, the engine rotating speed signal, the engine torque signal and the wheel speed signal.
The sensor 30 is configured to acquire transmission parameters of the transmission and engine parameters of the engine when the transmission, the engine and the load motor operate;
it should be noted that a sensor (english name: transducer/sensor) is a detection device, which can sense the measured information and convert the sensed information into an electrical signal according to a certain rule or output information in other required forms, so as to meet the requirements of information transmission, processing, storage, display, recording, control, etc. The sensor features include: miniaturization, digitalization, intellectualization, multifunction, systematization and networking. The method is the first link for realizing automatic detection and automatic control. The existence and development of the sensor lead the object to have the senses of touch, taste, smell and the like, and lead the object to slowly become alive. Generally, the sensor is classified into ten categories, i.e., a thermosensitive element, a photosensitive element, a gas-sensitive element, a force-sensitive element, a magnetic-sensitive element, a humidity-sensitive element, a sound-sensitive element, a radiation-sensitive element, a color-sensitive element, and a taste-sensitive element, according to their basic sensing functions.
It will be appreciated that the gearbox parameters of the gearbox include: the temperature of the gearbox, the centre distance of the gearbox and the transmission ratio between each gear set of the gearbox.
The engine parameters of the engine are: the number of cylinders. The number of cylinders of the engine is, for example: there are single cylinder, 3 cylinder, 4 cylinder, 6 cylinder, 8 cylinder, 12 cylinder, etc. Under the same condition, the more the cylinders are, the more power is provided; the number of valves that the valve engine has per cylinder, for example: the valve has two valves, three valves, four valves and five valves. Under the condition of equal displacement, the more the air valves are, the better the air intake and exhaust efficiency is; the arrangement mode of the cylinders; for example: inline (L) type: the engine has the advantages of simple structure, low cost, small size, good stability, less fuel consumption, but lower power, and is not suitable for engines with more than 6 cylinders. The discharge capacity; the volume of space through which the piston moves from top dead center to bottom dead center is called the displacement of the cylinder; if the engine has several cylinders, the sum of all the working volumes of the cylinders is called the engine displacement. Compression ratio is generally expressed in liters (L); the ratio of the total volume of the cylinder above the piston at the bottom dead center to the total volume of the combustion chamber above the piston at the top dead center; maximum power and maximum torque, generally the larger the compression ratio is, the larger the engine displacement is, and the maximum power and torque of each cylinder are; the maximum power and torque of the diesel engine are larger than those of the gasoline engine under the condition of the same displacement. The larger the maximum power of the engine is, the better the dynamic property is, the higher the maximum vehicle speed is, and the larger the acceleration and climbing capacity of the automobile under the condition of no gear shifting in the driving process is.
In a specific implementation, the sensor is used for acquiring the transmission parameters of the transmission and the engine parameters of the engine when the transmission engine and the load motor run, and the acquisition is realized through a specific sensing element of the sensor, such as a temperature sensor, through resistance sensing, the principle of the sensor is that the resistance value of metal changes along with the temperature change, and for different metals, the resistance value changes differently when the temperature changes once, and the resistance value can be directly used as an output signal. The type of sensor detection will vary for different parameter types.
The NI collector 40 is configured to obtain the transmission parameter and the engine parameter collected by the sensor;
it should be noted that the NI collector is a computer and its supporting equipment used in the fields of information science and system science, mechanical engineering, electronic and communication technology, and computer science, and is activated in 2013, 9 months and 11 days.
In specific implementation, in order to realize signal acquisition, as shown in fig. 2, in this embodiment, a USB-CDAQ9185 four card slots are used as an acquisition carrier, and a corresponding module is used to acquire signals of each sensor; the NI collector uses a simulation acquisition card NI9234 which is responsible for acquiring parameters acquired by an accelerator sensor; the NI collector is in charge of collecting parameters obtained by the pressure sensor by using an analog collection card NI 9215; the NI collector is in charge of collecting parameters obtained by the temperature sensor by using an analog collection card 9211;
further, the NI collector is further used for uploading the gearbox parameters and the engine parameters to the upper computer through a CAN bus, so that the upper computer determines gearbox test results according to the gearbox parameters, the engine parameters and test instructions sent by the upper computer.
It can be understood that the upper computer determines the gearbox test result according to the gearbox parameters, the engine parameters and the test instruction sent by the upper computer, and the gearbox test result has the following conditions: detection of engine idle speed: the engine is in idle speed, and when the automatic transmission is placed in the N gear after the normal water temperature is reached, whether the idle speed of the engine is in a normal range or not is judged. If the idling speed is too low, when the transmission is set to be R, D or 2 or 1, the vehicle body can vibrate, engine flameout can occur when riding comfort is seriously affected, and if the idling speed is too high, gear shifting impact can be generated; in an automatic transmission, a throttle cable is connected to a throttle valve of an engine, and an engine throttle opening signal is converted into a throttle oil pressure signal by a displacement variation amount of the throttle valve. The detection of the throttle valve pull wire mainly comprises the steps of detecting the throttle opening representing the load of the engine; the hydraulic test of the automatic transmission is carried out, an engine is closed, when the transmission is placed in P, a node plug of oil pressure to be tested is dismounted, an oil pressure test tube head is connected, an oil pressure hose and an oil pressure gauge are connected, the engine is started, the transmission is in a state that the oil pressure is tested, and whether the connection between a tube joint and an oil tube is reliable or not is checked, and oil leakage exists or not is checked. After the oil temperature of the transmission reaches the normal working temperature, oil pressure calibration values are tested and recorded under various working conditions, and the working condition of the system is judged by comparing the difference between the measured value and the standard value.
It can be understood that the internal workflow of the rack system is shown in fig. 3, where 1 is an engine intake water temperature sensor; 2 is an engine water outlet sensor; 3 is an exhaust temperature sensor; 4 is a fuel temperature sensor; 5 is a water inlet pressure sensor of the engine; 6 is an engine water outlet pressure sensor; 7 is an exhaust pressure sensor; 8 is a fuel pressure sensor; and 9 is an acceleration sensor.
In the embodiment, the test instruction sent by the upper computer is received through the rack device, and the gearbox, the engine and the load motor are controlled to operate according to the test instruction; acquiring gearbox parameters of a gearbox and engine parameters of an engine when the gearbox, the engine and a load motor run through sensors; the gearbox parameter and the engine parameter acquired by the sensor are acquired by the NI acquisition device, and then the gearbox parameter and the engine parameter are uploaded to the upper computer through the CAN bus, so that the upper computer determines a gearbox test result according to the gearbox parameter, the engine parameter and a test instruction sent by the upper computer, the gearbox is tested under different driving working conditions, and the technical problem that uncontrollable factors exist in gearbox debugging work is solved.
Based on the embodiment shown in fig. 1 described above, a second implementation of the transmission testing system of the present invention is presented.
In this embodiment, the sensor 30 includes: an acceleration sensor, the transmission parameters comprising: a vibration acceleration signal;
the acceleration sensor is arranged on a shell of the gearbox and used for collecting the vibration acceleration signals and sending the vibration acceleration signals to the NI collector.
The sensor includes: engine water pressure sensor, engine vent-pipe pressure sensor and engine fuel pressure sensor, the engine parameter includes: an engine inlet/outlet water pressure signal, an engine fuel pressure signal, and an engine exhaust pipe pressure signal;
the engine water pressure sensor is arranged on a water inlet pipe and a water outlet pipe of the engine and is used for collecting water inlet/outlet pressure signals of the engine and sending the water inlet/outlet pressure signals of the engine to the NI collector;
the engine exhaust pipe pressure sensor is arranged on an exhaust pipe of the engine and used for acquiring an engine exhaust pipe pressure signal and sending the engine exhaust pipe pressure signal to the NI collector;
the engine fuel pressure sensor is arranged on a fuel pipe of the engine and used for collecting an engine fuel pressure signal and sending the engine fuel pressure signal to the NI collector.
The sensor includes: the engine water temperature sensor, engine exhaust pipe temperature sensor and engine fuel temperature sensor, the engine parameter includes: engine inlet/outlet water temperature signal, engine exhaust pipe temperature signal and engine fuel temperature signal
The engine water temperature sensor is arranged on a water inlet pipe and a water outlet pipe of the engine and used for acquiring water inlet temperature signals and water outlet temperature signals of the engine and sending the water inlet temperature signals and the water outlet temperature signals of the engine to the NI collector;
the engine exhaust pipe temperature sensor is arranged on an exhaust pipe of the engine and used for acquiring an engine exhaust pipe temperature signal and sending the engine exhaust pipe temperature signal to the NI acquisition unit;
the engine fuel temperature sensor is arranged on a fuel pipe of the engine and used for acquiring the engine fuel temperature signal and sending the engine fuel temperature signal to the NI collector.
In this embodiment, the acceleration sensor is disposed on a housing of the transmission case, and is configured to collect the vibration acceleration signal and send the vibration acceleration signal to the NI collector; the engine water pressure sensor is arranged on a water inlet pipe and a water outlet pipe of the engine and is used for collecting water inlet/outlet pressure signals of the engine and sending the water inlet/outlet pressure signals of the engine to the NI collector; the engine exhaust pipe pressure sensor is arranged on an exhaust pipe of the engine and used for acquiring an engine exhaust pipe pressure signal and sending the engine exhaust pipe pressure signal to the NI collector; the engine fuel pressure sensor is arranged on a fuel pipe of the engine and used for acquiring an engine fuel pressure signal and sending the engine fuel pressure signal to the NI collector. The sensor includes: the engine water temperature sensor, engine exhaust pipe temperature sensor and engine fuel temperature sensor, the engine parameter includes: the engine water temperature sensor is arranged on a water inlet pipe and a water outlet pipe of the engine and used for acquiring the water inlet temperature signal and the water outlet temperature signal of the engine and sending the water inlet temperature signal and the water outlet temperature signal of the engine to the NI collector; the engine exhaust pipe temperature sensor is arranged on an exhaust pipe of the engine and used for acquiring an engine exhaust pipe temperature signal and sending the engine exhaust pipe temperature signal to the NI collector; the engine fuel temperature sensor is arranged on a fuel pipe of the engine and used for collecting the engine fuel temperature signal and sending the engine fuel temperature signal to the NI collector.
Referring to fig. 4, the transmission testing system of the present invention provides a transmission testing method, and fig. 4 is a schematic flow chart of a first embodiment of the transmission testing method of the present invention, and the transmission testing system includes: the system comprises information reading equipment, terminal equipment and bar code generating equipment; the gearbox testing method comprises the following steps:
step S10: and the rack equipment receives the test instruction sent by the upper computer and controls the gearbox, the engine and the load motor to operate according to the test instruction.
It should be noted that, the receiving of the test instruction sent by the upper computer is the start of the whole gearbox detection process, and the sensor and the NI collector do not work until the test instruction is received.
Step S20: the sensor collects gearbox parameters of the gearbox and engine parameters of the engine when the gearbox, the engine and the load motor run.
It can be understood that the sensors are used for acquiring the parameters of the gearbox and the engine through sensing elements of the sensors.
Step S30: and the NI collector acquires the gearbox parameters and the engine parameters collected by the sensor.
Step S40: the NI collector uploads the gearbox parameters and the engine parameters to the upper computer through a CAN bus, so that the upper computer determines gearbox test results according to the gearbox parameters, the engine parameters and test instructions sent by the upper computer.
In the embodiment, the test instruction sent by the upper computer is received through the rack device, and the gearbox, the engine and the load motor are controlled to operate according to the test instruction; acquiring gearbox parameters of a gearbox and engine parameters of an engine when the gearbox, the engine and a load motor run through sensors; the gearbox parameter and the engine parameter acquired by the sensor are acquired by the NI acquisition device and then uploaded to the upper computer through the CAN bus, so that the upper computer determines a gearbox test result according to the gearbox parameter, the engine parameter and a test instruction sent by the upper computer, the gearbox is tested under different driving conditions, and the technical problem that uncontrollable factors exist in the debugging work of the gearbox is solved.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of other like elements in a process, method, article, or system comprising the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
In the unit claims enumerating several means, several of these means can be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structures or equivalent processes performed by the present invention or directly or indirectly applied to other related technical fields are also included in the scope of the present invention.
Claims (9)
1. A transmission testing system, comprising: the device comprises a supporting tool, a rack device, a plurality of sensors and an NI collector;
the supporting tool is used for placing a gearbox and an engine of a vehicle to be tested, and the sensor is arranged at a preset position of the gearbox and the preset position of the engine;
the rack equipment is used for placing a load motor, receiving a test instruction sent by an upper computer and controlling the transmission case, the engine and the load motor to operate according to the test instruction, wherein the load motor is used for generating a driving torque;
the sensor is used for acquiring gearbox parameters of the gearbox and engine parameters of the engine when the gearbox, the engine and the load motor run;
the NI collector is used for obtaining the gearbox parameters and the engine parameters collected by the sensor;
the NI collector is also used for uploading the gearbox parameters and the engine parameters to the upper computer through a CAN bus so that the upper computer CAN determine gearbox test results according to the gearbox parameters, the engine parameters and test instructions sent by the upper computer;
the rack equipment is also used for collecting key parameters under different vehicle running conditions through a CAN bus and uploading the key parameters to the upper computer so that the upper computer evaluates the gearbox test according to the key parameters;
wherein, the vehicle driving condition includes: the method comprises the following steps of (1) working conditions of creeping, creeping switching, starting and gear shifting;
the key parameters include: the system comprises a gear shifting handle signal, a brake percentage signal, a vehicle speed signal, a vehicle resistance simulation signal, a gearbox oil temperature signal, an engine rotating speed signal, an engine torque signal, a wheel speed signal and an accelerator percentage signal;
the upper computer is used for detecting the idling of the engine: if the engine is in the idling state, after the normal water temperature is reached, when the automatic transmission is placed in an N gear, judging whether the idling state of the engine is in a normal range; the upper computer is also used for detecting a throttle valve stay wire, in the automatic transmission, the throttle valve stay wire is connected to a throttle valve on an engine, and an opening signal of the throttle valve of the engine is converted into an oil pressure signal of the throttle valve through the displacement variation of the throttle valve; the throttle opening degree of the engine load is characterized by being detected; the upper computer is also used for carrying out hydraulic test on the automatic transmission, closing the engine, detaching a node plug of oil pressure to be tested when the transmission is arranged in the P position, connecting an oil pressure test tube head, connecting an oil pressure hose and an oil pressure gauge, starting the engine to enable the transmission to be in an oil pressure tested state, and checking whether the connection between the tube joint and the oil tube is reliable or not and whether oil leakage exists or not; after the oil temperature of the transmission reaches the normal working temperature, oil pressure calibration values are tested and recorded under various working conditions, and the working condition of the system is judged by comparing the difference between the measured value and the standard value.
2. A transmission testing system according to claim 1 wherein the sensor comprises an acceleration sensor and the transmission parameter comprises a vibration acceleration signal;
the acceleration sensor is arranged on a shell of the gearbox and used for collecting the vibration acceleration signals and sending the vibration acceleration signals to the NI collector.
3. A transmission testing system as defined in claim 2 wherein said sensors include an engine water pressure sensor, an engine exhaust pressure sensor and an engine fuel pressure sensor, and said engine parameters include: an engine inlet/outlet water pressure signal, an engine fuel pressure signal, and an engine exhaust pipe pressure signal;
the engine water pressure sensor is arranged on a water inlet pipe and a water outlet pipe of the engine and is used for collecting water inlet/outlet pressure signals of the engine and sending the water inlet/outlet pressure signals of the engine to the NI collector;
the engine exhaust pipe pressure sensor is arranged on an exhaust pipe of the engine and used for acquiring an engine exhaust pipe pressure signal and sending the engine exhaust pipe pressure signal to the NI collector;
the engine fuel pressure sensor is arranged on a fuel pipe of the engine and used for collecting an engine fuel pressure signal and sending the engine fuel pressure signal to the NI collector.
4. A transmission testing system according to claim 2, wherein the sensor comprises: the engine water temperature sensor, engine exhaust pipe temperature sensor and engine fuel temperature sensor, the engine parameter includes: an engine inlet/outlet water temperature signal, an engine exhaust pipe temperature signal and an engine fuel temperature signal;
the engine water temperature sensor is arranged on a water inlet pipe and a water outlet pipe of the engine and used for acquiring water inlet temperature signals and water outlet temperature signals of the engine and sending the water inlet temperature signals and the water outlet temperature signals of the engine to the NI collector;
the engine exhaust pipe temperature sensor is arranged on an exhaust pipe of the engine and used for acquiring an engine exhaust pipe temperature signal and sending the engine exhaust pipe temperature signal to the NI collector;
the engine fuel temperature sensor is arranged on a fuel pipe of the engine and used for collecting the engine fuel temperature signal and sending the engine fuel temperature signal to the NI collector.
5. The transmission testing system of claim 1, wherein the stage apparatus is further configured to collect a brake percentage signal, a shift handle signal, a vehicle speed signal, a vehicle resistance signal, and a transmission oil temperature signal during the creep condition;
the rack equipment is also used for sending the brake percentage signal, the gear shifting handle signal, the vehicle speed signal, the vehicle resistance signal and the gearbox oil temperature signal to an upper computer, so that the upper computer evaluates the creeping working condition according to the brake percentage signal, the gear shifting handle signal, the vehicle speed signal, the vehicle resistance signal and the gearbox oil temperature signal.
6. The transmission testing system of claim 1, wherein the stage apparatus is further configured to collect a shift handle signal, a brake percentage signal, a vehicle speed signal, a vehicle resistance analog signal, and a transmission oil temperature signal under a creep shift condition;
the rack equipment is also used for sending the brake percentage signal, the gear shifting handle signal, the vehicle speed signal, the vehicle resistance signal and the gearbox oil temperature signal to an upper computer, so that the upper computer evaluates the creep switching working condition according to the brake percentage signal, the gear shifting handle signal, the vehicle speed signal, the vehicle resistance signal and the gearbox oil temperature signal.
7. The transmission testing system of claim 1, wherein the stage device is further configured to collect a shift handle signal, a brake percentage signal, a vehicle speed signal, a vehicle resistance analog signal, a transmission oil temperature signal, and an engine speed signal during a launch condition;
the rack equipment is also used for sending the brake percentage signal, the gear shifting handle signal, the vehicle speed signal, the vehicle resistance signal, the gearbox oil temperature signal and the engine rotating speed signal to an upper computer, so that the upper computer evaluates the starting working condition according to the brake percentage signal, the gear shifting handle signal, the vehicle speed signal, the vehicle resistance signal, the gearbox oil temperature signal and the engine rotating speed signal.
8. The transmission testing system of claim 1, wherein the stage apparatus is further configured to collect a shift handle signal, a brake percentage signal, a vehicle speed signal, a vehicle resistance analog signal, a transmission oil temperature signal, an engine speed signal, an engine torque signal, and a wheel speed signal during a shift condition;
the rack equipment is further used for sending the gear shifting handle signal, the brake percentage signal, the vehicle speed signal, the vehicle resistance analog signal, the gearbox oil temperature signal, the engine rotating speed signal, the engine torque signal and the wheel speed signal to an upper computer under the gear shifting working condition, so that the upper computer evaluates the gear shifting working condition according to the gear shifting handle signal, the brake percentage signal, the vehicle speed signal, the vehicle resistance analog signal, the gearbox oil temperature signal, the engine rotating speed signal, the engine torque signal and the wheel speed signal.
9. A gearbox testing method, characterised in that it is applied to a gearbox testing system according to any one of claims 1 to 8, the method comprising:
the rack equipment receives a test instruction sent by the upper computer and controls the gearbox, the engine and the load motor to operate according to the test instruction;
the sensor collects gearbox parameters of the gearbox and engine parameters of the engine when the gearbox, the engine and the load motor run;
the NI collector is used for acquiring the gearbox parameters and the engine parameters collected by the sensor;
the NI collector uploads the gearbox parameters and the engine parameters to the upper computer through a CAN bus, so that the upper computer determines gearbox test results according to the gearbox parameters, the engine parameters and test instructions sent by the upper computer;
the rack equipment also collects key parameters under different vehicle running conditions through a CAN bus and uploads the key parameters to the upper computer, so that the upper computer evaluates the gearbox test according to the key parameters; wherein, the vehicle operating mode includes: the method comprises the following steps of (1) carrying out creep working conditions, creep switching working conditions, starting working conditions and gear shifting working conditions; the key parameters include: the system comprises a gear shifting handle signal, a brake percentage signal, a vehicle speed signal, a vehicle resistance simulation signal, a gearbox oil temperature signal, an engine rotating speed signal, an engine torque signal, a wheel speed signal and an accelerator percentage signal;
the upper computer is used for detecting the idling of the engine: if the engine is in idle speed, after the normal water temperature is reached, when the automatic transmission is placed in an N gear, judging whether the idle speed of the engine is in a normal range; the upper computer is also used for detecting a throttle valve stay wire, in the automatic transmission, the throttle valve stay wire is connected to a throttle valve on an engine, and an opening signal of the throttle valve of the engine is converted into an oil pressure signal of the throttle valve through the displacement variation of the throttle valve; detecting the throttle opening degree of the engine load; the upper computer is also used for carrying out hydraulic test on the automatic transmission, closing the engine, detaching a node plug of oil pressure to be tested when the transmission is arranged in the P position, connecting an oil pressure test tube head, connecting an oil pressure hose and an oil pressure gauge, starting the engine to enable the transmission to be in an oil pressure tested state, and checking whether the connection between the tube joint and the oil tube is reliable or not and whether oil leakage exists or not; after the oil temperature of the transmission reaches the normal working temperature, oil pressure calibration values are tested and recorded under various working conditions, and the working condition of the system is judged by comparing the difference between the measured value and the standard value.
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