CN102759444A - EGR (Exhaust Gas Recirculation) valve detection device of linear motor - Google Patents
EGR (Exhaust Gas Recirculation) valve detection device of linear motor Download PDFInfo
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- CN102759444A CN102759444A CN2012102205755A CN201210220575A CN102759444A CN 102759444 A CN102759444 A CN 102759444A CN 2012102205755 A CN2012102205755 A CN 2012102205755A CN 201210220575 A CN201210220575 A CN 201210220575A CN 102759444 A CN102759444 A CN 102759444A
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Abstract
The invention relates to an EGR (Exhaust Gas Recirculation) valve detection device of a linear motor. The EGR valve detection device is characterized by comprising a feedback voltage detection mechanism and a leakage detection mechanism, wherein the feedback voltage detection mechanism comprises a computer which is connected with a PWM (Pulse Width Modulation) electromagnetic signal input end and a feedback voltage output end; the leakage detection mechanism comprises an air pump, and a two-stage pressure stabilizing mechanism is arranged behind the air pump; and the two-stage pressure stabilizing mechanism is connected with a flowmeter which is connected with the computer. The invention has the beneficial effects that the EGR valve detection device is reasonable in design, complete in detection functions, convenient to use, high in efficiency and good in reliability, and the advantages of completely eradicating misjudgement phenomena, guaranteeing the quality of ex-factory products, and simultaneously reducing the manpower cost greatly are achieved.
Description
Technical field
The present invention relates to a kind of valve detection device.
Background technology
The EGR technology, promptly EGR Technology (Exhaust Gas Recycle) is the emission-control equipment that is provided with to harmful gas (NOx).It gets into combusted cylinder after a part of exhaust cycle is got into draft tube and fresh air mixes once more, and to increase the thermal capacity of combination gas, the maximum temperature when reducing burning suppresses the generation of NOx; Simultaneously can reduce engine consumption.In said process, the EGR valve has been brought into play enormous function as the executive component of a key; The EGR valve is according to the engine actual working state; Adjust the aperture of valve, thereby adjustment gets into the exhausted air quantity of engine in good time and accurately, play the purpose that improves emission standard then.
Linear electric machine EGR valve product in process of production owing to receive parts quality, influences such as assembly technology; The existence of substandard product is arranged all the time; Showing as of substandard product: the curved line relation of input pwm signal and output feedback is not linear, and valve seat leaks with the orienting sleeve flow and exceed standard, if with this type of substandard product use on automobile; Will cause being short of power of automobile, discharge the appearance of problems such as exceeding standard.
Flow out for fear of substandard product, linear electric machine EGR valve production firm all can be to the product of producing
Detect one by one, and in testing process, because the requirement of properties of product; Leakage parameters and feedback voltage to valve seat and orienting sleeve when guaranteeing not damage product appearance detect; The detection method of present stage is to utilize manual detection fully, under the situation of no special inspecting equipment, is prone to the high shortcoming of False Rate; And efficient is too low, and human cost is high.My company is the outflow of stopping unacceptable product, improves the quality of products, and improves detection efficiency, reduces human cost, developed this efficient, accurately, linear electric machine EGR valve detection device that automaticity is high.
Summary of the invention
The object of the invention; Provide that a kind of automaticity is high, precision is high, the product data trackability is good; Operation labour intensity is low; The fail-test function that possesses these series of products simultaneously, and adopt portable construction, can realize providing the on-the-spot equipment that detects to remedy the deficiency of prior art for the client easily.
The technical scheme that the present invention adopted is: linear electric machine EGR valve detection device is characterized in that: comprise feedback voltage testing agency and leak detection mechanism; Feedback voltage testing agency comprises computing machine, and computing machine is connected with PWM electromagnetic signal input end and feedback voltage output terminal; Leak detection mechanism comprises air pump, and two-stage voltage stabilizing mechanism is arranged behind the air pump; Secondary voltage stabilizing mechanism is connected with flowmeter, and flowmeter connects computing machine.
One-level voltage stabilizing mechanism is a gas-holder; Secondary voltage stabilizing mechanism comprises gas-holder, pressure transducer and electric control valve.
Beneficial effect of the present invention is: pick-up unit is reasonable in design, and measuring ability is complete, and is easy to use, and efficient is high, and good reliability has been stopped the erroneous judgement phenomenon, and the quality of the product that guaranteed to dispatch from the factory has lowered human cost simultaneously greatly.
Below in conjunction with accompanying drawing, and, the present invention is done further description through embodiment.
Description of drawings
Fig. 1 is a detection schematic diagram of the present invention.
Fig. 2 is the structural representation of the EGR valve of the embodiment of the invention.
Embodiment
Embodiment:
The detection of feedback voltage:
In the time of the testing product feedback voltage; Import pwm signal continuously through the computing machine adjustment; Drive valve 1 through the inner electromagnet portion 8 of driven product and produce displacement; Valve 1 displacement converts feedback voltage signal V to through position transducer 9 and is transported to computing machine, and system is through continuous acquisition, thus the relation of formation valve displacement (aperture) and feedback voltage and driving dutycycle; Simultaneously, through measuring flow sensor data and valve opening relation curve, the product index of promptly measuring.The data of surveying get into database simultaneously and carry out corresponding stored.
In like manner, whole operating modes of linear electric machine EGR valve have been included in the design of our pwm signal, have promptly designed a plurality of apertures of valve rod; Corresponding a plurality of point is just arranged on the display device; After annexation was accomplished, these points had been formed curve, different dutycycle--aperture--flow curve and aperture----the feedback voltage curve of corresponding generation; Through intuitively checking curve whether within predefined bound scope, promptly whether system can judge qualified products automatically.
Leak detection:
When the testing product flow leaks, source of the gas input malleation signal, flowmeter promptly produces a reading; Gas is opened product valve 1 after getting into product, and the gas medium of the certain mass of source of the gas input is through valve 1; Thereby produce a pressure reduction with the gas of input, this pressure reduction feeds back to computing machine through flowmeter, can obtain a point; This closes from coordinate fastens the relation that shows valve opening and flow, is exactly the product index that we need measure.
During practical application, be provided with air pump 2, be used for producing malleation at malleation inlet end end; In order to reduce the fluctuation of air pressure, be provided with two-stage voltage stabilizing mechanism, one-level voltage stabilizing mechanism is simple gas-holder 3; Can reduce the undulating quantity of downstream air pressure, the higher pressure-stabilized air source of precision if desired, just must use secondary voltage stabilizing mechanism: secondary voltage stabilizing mechanism is except also having pressure-stabilized air source 3; Also have pressure transducer 5 and electric control valve 4, when air pressure is greater than or less than setting value, after pressure transducer 5 detects; Feed back signal to electric control valve 4, system regulates through driving electric control valve 4 automatically, to reach the stable purpose of source of the gas.The malleation inlet end is received the air intake opening C of linear electric machine EGR valve 10, and so, air intake opening C just has stable air pressure all the time, feeds back data on flows Q to computing machine 7 through the flowmeter between pressure-stabilized air source and the product air intake opening 6.
Simultaneously, the data computer of all detections and storage are got up, and are convenient to follow-up of product quality, guarantee the trackability of product.
Claims (2)
1. linear electric machine EGR valve detection device is characterized in that: comprise feedback voltage testing agency and leak detection mechanism; Feedback voltage testing agency comprises computing machine, and computing machine is connected with PWM electromagnetic signal input end and feedback voltage output terminal; Leak detection mechanism comprises air pump, and two-stage voltage stabilizing mechanism is arranged behind the air pump; Secondary voltage stabilizing mechanism is connected with flowmeter, and flowmeter connects computing machine.
2. according to the described linear electric machine EGR of claims valve detection device, it is characterized in that: one-level voltage stabilizing mechanism is a gas-holder; Secondary voltage stabilizing mechanism comprises gas-holder, pressure transducer and electric control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102205755A CN102759444A (en) | 2012-06-29 | 2012-06-29 | EGR (Exhaust Gas Recirculation) valve detection device of linear motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102205755A CN102759444A (en) | 2012-06-29 | 2012-06-29 | EGR (Exhaust Gas Recirculation) valve detection device of linear motor |
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| CN102759444A true CN102759444A (en) | 2012-10-31 |
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| CN2012102205755A Pending CN102759444A (en) | 2012-06-29 | 2012-06-29 | EGR (Exhaust Gas Recirculation) valve detection device of linear motor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105388006A (en) * | 2015-11-13 | 2016-03-09 | 无锡隆盛科技股份有限公司 | Response time detection method for position feedback-free EGR valve |
| CN111693275A (en) * | 2020-05-09 | 2020-09-22 | 山东泰展机电科技股份有限公司 | EGR valve performance test system and use method thereof |
| CN112855390A (en) * | 2021-03-17 | 2021-05-28 | 太仓源凯汽车配件有限公司 | EGR valve on-line measuring platform |
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| JPH1019156A (en) * | 1996-06-28 | 1998-01-23 | Daikin Ind Ltd | Solenoid valve driving method and its device |
| CN101770240A (en) * | 2010-02-24 | 2010-07-07 | 衡阳北方光电信息技术有限公司 | Control method for intelligent valve positioner |
| CN101881704A (en) * | 2010-06-08 | 2010-11-10 | 武汉科技大学 | Vacuum valve quality detection platform |
| CN102359872A (en) * | 2011-09-06 | 2012-02-22 | 宜宾天瑞达汽车零部件有限公司 | Detection device of vacuum solenoid valve |
| CN202693663U (en) * | 2012-06-29 | 2013-01-23 | 宜宾天瑞达汽车零部件有限公司 | Exhaust gas recirculation (EGR) valve detection device of linear motor |
-
2012
- 2012-06-29 CN CN2012102205755A patent/CN102759444A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1019156A (en) * | 1996-06-28 | 1998-01-23 | Daikin Ind Ltd | Solenoid valve driving method and its device |
| CN101770240A (en) * | 2010-02-24 | 2010-07-07 | 衡阳北方光电信息技术有限公司 | Control method for intelligent valve positioner |
| CN101881704A (en) * | 2010-06-08 | 2010-11-10 | 武汉科技大学 | Vacuum valve quality detection platform |
| CN102359872A (en) * | 2011-09-06 | 2012-02-22 | 宜宾天瑞达汽车零部件有限公司 | Detection device of vacuum solenoid valve |
| CN202693663U (en) * | 2012-06-29 | 2013-01-23 | 宜宾天瑞达汽车零部件有限公司 | Exhaust gas recirculation (EGR) valve detection device of linear motor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105388006A (en) * | 2015-11-13 | 2016-03-09 | 无锡隆盛科技股份有限公司 | Response time detection method for position feedback-free EGR valve |
| CN111693275A (en) * | 2020-05-09 | 2020-09-22 | 山东泰展机电科技股份有限公司 | EGR valve performance test system and use method thereof |
| CN112855390A (en) * | 2021-03-17 | 2021-05-28 | 太仓源凯汽车配件有限公司 | EGR valve on-line measuring platform |
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Application publication date: 20121031 |