CN101051036B - Aging system of oxygen sensor and its working method - Google Patents
Aging system of oxygen sensor and its working method Download PDFInfo
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- CN101051036B CN101051036B CN2006100349022A CN200610034902A CN101051036B CN 101051036 B CN101051036 B CN 101051036B CN 2006100349022 A CN2006100349022 A CN 2006100349022A CN 200610034902 A CN200610034902 A CN 200610034902A CN 101051036 B CN101051036 B CN 101051036B
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Abstract
An ageing system of oxygen transducer comprises hardware and application software. It is featured as forming hardware by engine rack including control cabinet, loading motor, engine, air exhaust pipe and air throttle motor; and temperature transducer being set at two ends of air exhaust test section for detecting air exhaust temperature; feeding detected temperature back to control cabinet and controlling rotary speed of engine by control cabinet through regulating said loading motor according to comparison of detected temperature with standard temperature zone.
Description
Technical field
The present invention relates to a kind of lambda sensor degradation testing system and test method, be used for lambda sensor is carried out durable degradation testing.
Background technique
Lambda sensor is as the important component part of electric injection system, and the discharging of motor is had very important effect.According in People's Republic of China's automobile industry standard to the description of automobile-used finger-type heating type oxygen sensors technical specifications, must carry out durable aging test to it.Stipulated in the standard for 12W heating stick lambda sensor and 18W heating stick lambda sensor aging testing method: lambda sensor must be installed in the controlled petrolic vent systems that λ (air fuel ratio) equals 1, speed and load change in the program in one 6 cycle, the temperature curve at its top as shown in Figure 1, be not less than the endurance test of 250h, wherein the first curve T1 represents the temperature of outlet pipe, and the second curve T2 represents the temperature of the hexagon nut position at motor top.At present, do not have a unified experiment porch in the industry, mainly have: with several experiment porch such as real vehicle, simulated combustion and stands, but on requiring, arrange temperature during the course with the very difficult assurance of real vehicle do test and all satisfy area requirement, and on the real vehicle too many lambda sensor can not be installed, only aging several costs were too high in 250 hours; Build the working condition requirement that pilot combustion channel simulated automotive exhaust emissions is difficult to 6 cycles that guaranteed, and equipment is difficult to also on intensity satisfy tested this requirement in 250 hours; Existing employing engine pedestal carries out the lambda sensor degradation testing and mainly relies on operator to monitor whole process, and higher on human cost, the automation and the intelligent degree of whole test are not enough simultaneously, are difficult to satisfy the demand of extensive degradation testing.
Summary of the invention
The purpose of this invention is to provide a kind of lambda sensor degradation testing system, this system realizes that automated intelligent finishes the lambda sensor degradation testing on the test platform basis of engine pedestal, and cost is low, efficient is high.
Another object of the present invention provides a kind of lambda sensor aging testing method, makes this system can finish the ageing process of lambda sensor automatically.
For achieving the above object, the present invention proposes a kind of lambda sensor degradation testing system, comprise hardware components and application software, its hardware components comprises engine pedestal, engine pedestal comprises control cabinet, loading motor, motor, outlet pipe and throttle motor, wherein first output terminal of control cabinet links to each other with the input end of loading motor, second output terminal of control cabinet links to each other with the input end of throttle motor, the output terminal of loading motor links to each other with motor, the output terminal of throttle motor links to each other with motor, outlet pipe links to each other with exhaust opening of engine, and described hardware components also comprises temperature transducer, and temperature transducer is installed in the two ends of outlet pipe test section, detect the temperature of outlet pipe, feed back to control cabinet, control cabinet is according to the comparison of this temperature and standard temperature band, by adjusting the rotating speed of loading motor control motor.
Described application software comprises memory module and control module is set, the magnitude of voltage of first output terminal of the magnitude of voltage of the throttle motor in storage lambda sensor each cycle of degradation testing and control cabinet in the memory module; The function of control module is the data of being responsible for reading in the memory module, and according to the temperature of temperature transducer feedback, control loaded motor and throttle motor.
Described memory module and control module are installed in the control cabinet.
The length of outlet pipe is 1.5m ~ 2m.
Outlet pipe is provided with soaking zone, parcel heat-preservation cotton on it.
Test section on the described outlet pipe is near suction port, and soaking zone is near the air outlet.
Also comprise the power supply that links to each other with the lambda sensor power end.
Lambda sensor aging testing method of the present invention is achieved in that this method is to be read the magnitude of voltage of first output terminal of the magnitude of voltage of throttle motor in each cycle of lambda sensor degradation testing of storage and control cabinet by control cabinet circulation, throttle opening by throttle motor control motor, the rotating speed by loading motor control motor respectively are up to finishing whole degradation testing; In ageing process, the Tail Pipe Temperature of control cabinet reading temperature sensor feedback, and, adjust the rotating speed that loading motor is controlled motor according to the comparative result of this temperature and standard temperature band.
The present invention adopts control cabinet by loading motor and throttle motor control motor, and detect in real time by the temperature of temperature transducer to outlet pipe, adjust loading motor and throttle motor by control cabinet, guarantee to simulate fully the real vehicle situation, entire test need not staff's intervention simultaneously, the automaticity height, cost is low, the efficient height.
Description of drawings
Also the present invention is described in further detail in conjunction with the accompanying drawings below by specific embodiment.
Fig. 1 is the temperature curve schematic representation of outlet pipe in the lambda sensor degradation testing.
Fig. 2 is a structural principle schematic representation of the present invention.
Fig. 3 is a schematic flow sheet of the present invention.
Embodiment
Referring to Fig. 2, the present invention is an a kind of lambda sensor degradation testing system, this system rides on the existing engine pedestal basis and makes up, experimental stand is to come the control loaded motor to satisfy the various operating mode demands of motor with the load that obtains different moment of torsion simulation real vehicles and this basic principle of different opening of controlling closure by the height of adjusting existing stand control cabinet output voltage, the present invention includes hardware components and application software, its hardware components comprises engine pedestal and temperature transducer 6, and engine pedestal comprises control cabinet 1, loading motor 2, motor 3, outlet pipe 4 and throttle motor 5.
Wherein, first output terminal of control cabinet 1 links to each other with the input end of loading motor 2, and second output terminal of control cabinet links to each other with the input end of throttle motor 5.
The output terminal of loading motor 2 links to each other with motor 3, is used to control the rotating speed of motor 3.
The output terminal of throttle motor 5 links to each other with motor 3, is used to regulate the throttle opening of motor 3.
Outlet pipe 4 links to each other with the relief opening of motor 3, is provided with test section near suction port on the outlet pipe 4, and it is provided with the lambda sensor seat, is used to install lambda sensor 8.The length of outlet pipe 4 generally should be controlled at 1.5m～2m, has lacked the quantity that can have influence on the control lambda sensor, thereby reduces the efficient of degradation testing; Grow the heat radiation that can increase outlet pipe, be difficult to reach the needed temperature requirement of test.
Temperature transducer 6 is installed in the two ends of outlet pipe 4 test sections, detect the temperature of outlet pipe, feed back to control cabinet 1, control cabinet 1 is according to the comparison of the standard temperature band of this temperature and lambda sensor degradation testing shown in Figure 1, if being higher than the standard temperature band, detected temperature just adjusts loading motor 2, thereby reduce the rotating speed of motor 3, otherwise then increase the rotating speed of motor 3.
In order to reduce the loss of heat in the process of the test, be provided with soaking zone at outlet pipe 4 near the air outlet, wrap up heat-preservation cotton on the soaking zone, thereby the residing ambient temperature of all lambda sensors is close in the proof test.
In order to make experimental enviroment simulate the real vehicle situation fully, power supply 7 is set, it links to each other with the power end of lambda sensor, and lambda sensor is heated, and is used to simulate the storage battery that heats to lambda sensor on the real vehicle.
Application software comprises memory module and the control module that is arranged in the control cabinet 1, the magnitude of voltage of first output terminal of the magnitude of voltage of the throttle motor 5 in storage lambda sensor each cycle of degradation testing and control cabinet 1 output in the memory module; The function of control module is the data of being responsible for reading in the memory module, and according to temperature, control loaded motor 2 and the throttle motor 5 of temperature transducer 6 feedback.
Referring to Fig. 3, method of work of the present invention comprises the steps:
The magnitude of voltage of first output terminal of the magnitude of voltage of throttle motor 5 in each cycle of lambda sensor degradation testing of storage and control cabinet 1 is read in control cabinet 1 circulation, pass through the rotating speed that throttle motor 5 is controlled the throttle opening of motors 3, passed through loading motor 2 control motors 3 respectively, up to finishing whole degradation testing; In ageing process, outlet pipe 4 temperature of control cabinet 1 reading temperature sensor 6 feedback, and, adjust the rotating speed that loading motor 2 is controlled motors 3 according to the comparative result of this temperature and standard temperature band.
Embodiment, select stable performance, be easy to safeguard and the delivery temperature of three kinds of operating modes of motor can satisfy the motor of temperature range shown in Figure 1, in the present embodiment, selection be the MATIZ motor of Daewoo Corp, its row Wen Keda 820 degree satisfy standard-required.
In order to improve conventional efficient, under the prerequisite of satisfied temperature requirement, 16 sensor holders of on outlet pipe 4, having burn-on; Heat is wanted the least possible loss in the experimentation, accomplish that first and the residing ambient temperature of last sensor are close, on the insulation end of outlet pipe 4, wrapped up heat-preservation cotton, a temperature transducer that detects Tail Pipe Temperature respectively has been installed at the two ends of outlet pipe 4 test sections.
At this experiment, motor only need provide 6 working staties to be circulated, and the criterion of working state is exactly row's temperature scope as shown in Figure 1.As long as the period 1 allows motor arrange temperature under idling operation between 390 ℃-480 ℃, idling row temperature is by the engine performance decision, only need get final product by the working time that control module is controlled motor 3; Require second round motor under sub load, to arrange 630 ℃-710 ℃ of warm scopes, adjust motor (constituent element of engine pedestal) with closure and regulate the engine air throttle aperture, in view of arranging temperature than higher, it is big that valve opening is wanted, determined the later output voltage of stand control cabinet just of loading of just can adjusting of valve opening, the foundation of adjusting just is mounted in two temperature transducers on the outlet pipe, the temperature value of guaranteeing the reflection of two sensors all within scope, is noted the magnitude of voltage of satisfactory throttle motor and the output voltage values of control cabinet.In like manner, determine above-mentioned two values and the record in all the other several cycles, the value in all cycles is stored in the memory module, during the degradation testing process, read the value control throttle motor 5 and the loading motor 2 of this storage again by control module.Because the external environment condition of each experiment has difference, so control module also will be according to the temperature correction delivery temperature of temperature transducer feedback in the test.Specific implementation is by being installed in the value of the temperature transducer at 16 sensor two ends on the outlet pipe 4, temperature value and being presented on the operation interface under the real-time monitoring record of control module, and be that standard temperature band among Fig. 1 carries out comparison with the data that collect and desired value, if find that the value of record exceeds the standard temperature band and just adjusts loading motor reduction engine speed, otherwise just increase rotating speed.
Loading motor role in a whole set of experimental facilities is quite important, in view of the character of this experiment is senile experiment, can be very long on the time, and so motor must be reliable and stable.
For experimental situation is infinitely close to the real vehicle situation, the power end that connects lambda sensor with 12V power supply (or storage battery) heats it.
To check equipment states such as motor, loading motor, control cabinet, power supply earlier before the experiment, operation software, by clicking the Start Button of software interface, enter experimentation, program is read in the rotating speed that two magnitude of voltage in the data file are controlled throttle opening and motor by the time sequencing of prior setting, need repeat such circulation during experiment, up to finishing scheduled time, promptly more than the 250h.
Accordingly, the present invention mainly contains following advantage: the oxygen sensor aging environmental simulation is true to nature, and the engine Exhaust Gas carries out degradation; Automation and intelligentification degree height, 250h, 125 circulations need not manually-operated fully by control module control; Ageing efficiency height, an experiment 16 sensors that can wear out at most.
Claims (7)
1. lambda sensor degradation testing system, comprise hardware components and application software, its hardware components comprises engine pedestal, engine pedestal comprises control cabinet (1), loading motor (2), motor (3), outlet pipe (4) and throttle motor (5), wherein first output terminal of control cabinet (1) links to each other with the input end of loading motor (2), second output terminal of control cabinet links to each other with the input end of throttle motor (5), the output terminal of loading motor (2) links to each other with motor (3), the output terminal of throttle motor (5) links to each other with motor (3), outlet pipe (4) links to each other with the relief opening of motor (3), it is characterized in that: described hardware components also comprises temperature transducer (6), temperature transducer (6) is installed in the two ends of outlet pipe (4) test section, detect the temperature of outlet pipe, feed back to control cabinet (1), control cabinet (1) is according to the comparison of this temperature and standard temperature band, by adjusting the rotating speed of loading motor (2) control motor (3), described application software comprises memory module and control module, the magnitude of voltage of first output terminal of the magnitude of voltage of the throttle motor (5) in storage lambda sensor each cycle of degradation testing and control cabinet (1) in the memory module; The function of control module is the data of being responsible for reading in the memory module, and according to temperature, control loaded motor (2) and the throttle motor (5) of temperature transducer (6) feedback.
2. lambda sensor degradation testing according to claim 1 system, it is characterized in that: described memory module and control module are installed in the control cabinet (1).
3. according to one of them described lambda sensor degradation testing system of claim 1 to 2, it is characterized in that: the length of outlet pipe (4) is 1.5m～2m.
4. according to one of them described lambda sensor degradation testing system of claim 1 to 2, it is characterized in that: outlet pipe (4) is provided with soaking zone, parcel heat-preservation cotton on it.
5. lambda sensor degradation testing according to claim 4 system is characterized in that: the test section on the described outlet pipe (4) is near suction port, and soaking zone is near the air outlet.
6. lambda sensor degradation testing according to claim 1 system is characterized in that: also comprise the power supply (7) that links to each other with the lambda sensor power end.
7. lambda sensor aging testing method, it is characterized in that: this method is to be read the magnitude of voltage of first output terminal of the magnitude of voltage of throttle motor (5) in each cycle of lambda sensor degradation testing of storage and control cabinet (1) by control cabinet (1) circulation, pass through the rotating speed that throttle motor (5) is controlled the throttle opening of motor (3), passed through loading motor (2) control motor (3) respectively, up to finishing whole degradation testing; In ageing process, outlet pipe (4) temperature of control cabinet (1) reading temperature sensor (6) feedback, and, adjust the rotating speed that loading motor (2) is controlled motor (3) according to the comparative result of this temperature and standard temperature band.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101363808B (en) * | 2008-09-12 | 2011-07-20 | 华中科技大学 | Tester for stability of gas sensor and array |
| JP2016008906A (en) * | 2014-06-25 | 2016-01-18 | 株式会社東芝 | Aging apparatus of constant potential electrolysis type gas sensor and aging method of constant potential electrolysis type gas sensor |
| CN110333381B (en) * | 2019-06-25 | 2021-10-29 | 河南美力达汽车有限公司 | Voltage acquisition system for oxygen sensor of automobile engine |
| CN110389958B (en) * | 2019-07-26 | 2022-05-17 | 迈普通信技术股份有限公司 | Method and device for dynamically adjusting aging frequency of hardware table entry and computer storage medium |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1386971A (en) * | 2001-05-22 | 2002-12-25 | 三菱电机株式会社 | Device and method for diagnosing fault of O2 sensor |
| CN1438412A (en) * | 2002-02-15 | 2003-08-27 | 本田技研工业株式会社 | O sensor and air-fuel-ratio control device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1386971A (en) * | 2001-05-22 | 2002-12-25 | 三菱电机株式会社 | Device and method for diagnosing fault of O2 sensor |
| CN1438412A (en) * | 2002-02-15 | 2003-08-27 | 本田技研工业株式会社 | O sensor and air-fuel-ratio control device |
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