CN102128710B - Air leakage testing device and method for air inlet pipe of turbo supercharged engine - Google Patents
Air leakage testing device and method for air inlet pipe of turbo supercharged engine Download PDFInfo
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- CN102128710B CN102128710B CN 201010600410 CN201010600410A CN102128710B CN 102128710 B CN102128710 B CN 102128710B CN 201010600410 CN201010600410 CN 201010600410 CN 201010600410 A CN201010600410 A CN 201010600410A CN 102128710 B CN102128710 B CN 102128710B
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Abstract
The invention discloses an air leakage testing device and method for an air inlet pipe of a turbo supercharged engine. The testing device is characterized in that one or more hollow bolts and a set of nuts matched with the hollow bolts are installed on a first air inlet pipe and/or a second air inlet pipe; and the set of nuts comprise at least one solid nut and a plurality of open nuts, and the open areas of the plurality of open nuts are not completely same. The air leakage testing method comprises the following steps of: firstly, obtaining the ratio of air quantity in a turbocharger during no air leakage to pressure in the second air inlet pipe; then measuring the ratio of the air quantity in the turbocharger with different air leakage sectional areas to the pressure in the second air inlet pipe; and finally, judging which air leakage sectional area needs to give an alarm according to the running states of the engine and an entire vehicle. Through the air leakage testing device and method disclosed by the invention, different air leakage sectional area conditions of air inlet pipes can be simulated precisely and quantitatively, and the air leakage of the air inlet pipes of a turbo supercharged engine system can be tested reliably.
Description
Technical field
The present invention relates to a kind of automobile testing device, particularly relate to a kind of leakage testing device of draft tube of the engine with turbosupercharger (turbocharger).
Background technology
See also Fig. 1, existing turbocharged engine system comprises turbosupercharger 10, cylinder 20 and charge air cooler 30.Have blower outlet 11 on turbosupercharger 10, have air throttle 21 on cylinder 20, draft tube 1 connects blower outlet 11 and charge air cooler 30 entrances, and draft tube 2 32 connects charge air cooler 30 outlet and air throttles 21.Charge air cooler 30, draft tube 1, draft tube 2 32 have consisted of the draft tube of turbosupercharged engine jointly.
Principal fault may occur the draft tube of turbosupercharged engine, specifically comprises: blower outlet 11 breaks with the junction of draft tube 1; Draft tube 1 is broken with the junction of charge air cooler 30; Charge air cooler 30 breaks with the junction of draft tube 2 32; Draft tube 2 32 is broken with the junction of air throttle 21; Charge air cooler 30 gas leakage; Draft tube one 31 gas leakage; Draft tube 2 32 gas leakage.In case leak air, if can not in time diagnosing, EMS (engine management system) is out of order, may cause occurring in driving process engine kill, draft tube lose vacuum tightness, continuously brake invalid, turn to malfunctioning and the situation such as can't start, this life security to the driver and conductor will produce serious threat.
In present automobile OBD (in-circuit diagnostic system), the effectively apparatus and method of simulation are not carried out in the draft tube gas leakage of turbosupercharged engine.Therefore, can't the precise quantification evaluation leak gas on the impact of engine operation, also be difficult to complete gas leakage test reliably comparatively accurately.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of leakage testing device of turbosupercharged engine draft tube, difference gas leakage sectional area situation that can precise quantification simulation draft tube, analyze different gas leakage sectional areas to the impact of engine operating state, thereby the gas leakage of draft tube is tested reliably.For this reason, the present invention also will provide the gas leakage method of testing of described turbosupercharged engine draft tube.
For solving the problems of the technologies described above, turbosupercharged engine draft tube of the present invention comprises that blower outlet is to the draft tube one between the charge air cooler entrance; Charge air cooler; Charge air cooler is exported to the draft tube two between air throttle; The leakage testing device of described turbosupercharged engine draft tube comprises: on draft tube one and/or draft tube two, one or more hollow bolts are installed, with the supporting one group of nut of described hollow bolt; Described one group of nut comprises at least one solid nut and a plurality of opening nut, and the aperture area on described a plurality of opening nuts is incomplete same.
The gas leakage method of testing of described turbosupercharged engine draft tube comprises the steps:
In the 1st step, in a turbocharged engine system, for all hollow bolts on draft tube one and/or draft tube two are all installed solid nut, measure air capacity A, the pressure B in draft tube two in turbosupercharger, and calculate both ratio A/B;
The 2nd step, a plurality of opening nuts with different openings area are installed respectively at least one hollow bolt on draft tube one and/or draft tube two, air capacity A ' after each opening nut of measurement installation in turbosupercharger, and the pressure B ' in draft tube two, and calculate both ratio A '/B ';
In the 3rd step, in the situation that turbocharger operation is worked as A '/B '＞A/Bf1 and A '/B '≤A/Bf2, the draft tube of the actual turbocharged engine system of judgement is little gas leakage; Work as A '/B '＞A/Bf2, the draft tube of the actual turbocharged engine system of judgement is large gas leakage;
In the idle situation of turbosupercharger, work as A '/B '＞A/Bf3, the draft tube of the actual turbocharged engine system of judgement is large gas leakage;
1＜f1≤f2≤f3＜2；
In the situation that turbocharger operation and gas are floored, fault is all reported in little gas leakage, large gas leakage;
In the situation that turbocharger operation and gas are not floored, only fault is reported in large gas leakage;
In the idle situation of turbosupercharger, only to large gas leakage newspaper fault.
Turbosupercharged engine draft tube leakage testing device of the present invention and its implementation can precise quantification simulation draft tube difference gas leakage sectional area situation, and the gas leakage of the draft tube of turbocharged engine system is tested reliably.
Description of drawings
Fig. 1 is the air intake duct system schematic diagram of turbosupercharged engine of the present invention;
Fig. 2 is the schematic diagram of turbosupercharged engine draft tube gas leakage method of testing of the present invention.
Description of reference numerals in figure:
The 10-turbosupercharger; The 11-blower outlet; The 20-cylinder; The 21-air throttle; The 30-charge air cooler; 31-draft tube one; 32-draft tube two.
Embodiment
See also Fig. 1, turbosupercharged engine draft tube of the present invention comprises that blower outlet 11 is to the draft tube 1 between charge air cooler 30 entrances; Charge air cooler 30; Charge air cooler 30 is exported to the draft tube 2 32 between air throttle 21.The leakage testing device of described turbosupercharged engine draft tube comprises: one or more hollow bolts (not shown) are installed, with the supporting one group of nut (not shown) of described hollow bolt on draft tube 1 and/or draft tube 2 32.This group nut comprises at least one solid nut and a plurality of opening nut, and the aperture area on a plurality of opening nuts is incomplete same.
For example, each circular hole that to make a call to a diameter be 10mm on the tube wall of draft tube 1 and draft tube 2 32, at these two circular holes hollow bolt that respectively to install a diameter additional be 10mm, each hollow bolt is furnished with one group of nut, and the circular open area on this group nut is respectively 0mm, 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm.The nut that described circular open area is 0mm is solid nut, and the aperture area on all the other nuts presents different sizes.Use the nut of different openings area to be installed on hollow bolt, just can simulate the situation of corresponding gas leakage sectional area.
See also Fig. 2, the gas leakage method of testing of described turbosupercharged engine draft tube comprises the steps:
In the 1st step, in a turbocharged engine system, for all hollow bolts on draft tube one and/or draft tube two are all installed solid nut, measure air capacity A, the pressure B in draft tube two in turbosupercharger, and calculate both ratio A/B.This ratio represents the situation the when draft tube of whole turbocharged engine system is air tight.
For example, the air capacity A in turbosupercharger is measured by the air flow meter in turbosupercharger (HFM), and the pressure B in draft tube two is measured by the pressure transducer in draft tube two.
The 2nd step, a plurality of opening nuts with different openings area are installed respectively at least one hollow bolt on draft tube one and/or draft tube two, air capacity A ' after each opening nut of measurement installation in turbosupercharger, and the pressure B ' in draft tube two, and calculate both ratio A '/B '.
For example, the opening total area of the nut that each hollow bolt is installed is in the situation of m, and the ratio A ' that obtains/B ' represents the situation when the draft tube gas leakage sectional area of whole turbocharged engine system is m.
The 3rd step, in the situation that turbocharger operation, when namely boost control is worked, the A ' that obtains when the 2nd step/B '＞A/Bf1 and A '/B '≤A/Bf2, the draft tube of the actual turbocharged engine system of judgement is little gas leakage; Work as A '/B '＞A/Bf2, the draft tube of the actual turbocharged engine system of judgement is large gas leakage.
In the idle situation of turbosupercharger, when namely boost control is inoperative, the A '/B '＞A/Bf3 that obtains when the 2nd step, the draft tube of the actual turbocharged engine system of judgement be to leak gas greatly.
Wherein, 1＜f1≤f2≤f3＜2.
In the situation that turbocharger operation and gas are floored (being full load), little gas leakage, large gas leakage are all reported to the police.
In the situation that turbocharger operation and gas do not floor, only to large leakage alarm.
In the idle situation of turbosupercharger, only to large leakage alarm.
The three kind alarm condition of described method in the 3rd step are all to occur when vehicle performance is had considerable influence.This warning makes engine enter safe limping pattern on the one hand, and after the fault that leaks air, the peak load of EMS meeting limiting engine makes engine operate in safe and reliable condition range; Also reminding driver in time keeps in repair on the other hand.
Turbosupercharged engine draft tube leakage testing device of the present invention and its implementation, can be used for the difference gas leakage sectional area of precise quantification simulation draft tube to the impact of engine operating state, can also improve engine with supercharger gas leakage diagnostic reliability, reduce the risk of gas leakage diagnosis wrong report, can also search out further the draft tube gas leakage actual internal area that must diagnose out principal fault (otherwise engine can't normally move) corresponding.
Above by embodiment, the present invention is described in detail; but these are not to be construed as limiting the invention; those skilled in the art also can make some distortion and improvement in the situation that do not break away from the principle of the invention, and these also should be considered as protection scope of the present invention.
Claims (2)
1. the leakage testing device of a turbosupercharged engine draft tube, the draft tube of described turbosupercharged engine comprises that blower outlet is to the draft tube one between the charge air cooler entrance; Charge air cooler; Charge air cooler is exported to the draft tube two between air throttle; It is characterized in that, described leakage testing device comprises: on draft tube one and/or draft tube two, one or more hollow bolts are installed, with the supporting one group of nut of described hollow bolt; Described one group of nut comprises at least one solid nut and a plurality of opening nut, and the aperture area on described a plurality of opening nuts is incomplete same.
2. right to use requires the gas leakage method of testing of the leakage testing device of 1 described turbosupercharged engine draft tube, it is characterized in that, comprises the steps:
In the 1st step, in a turbocharged engine system, for all hollow bolts on draft tube one and/or draft tube two are all installed solid nut, measure air capacity A, the pressure B in draft tube two in turbosupercharger, and calculate both ratio A/B;
The 2nd step, a plurality of opening nuts with different openings area are installed respectively at least one hollow bolt on draft tube one and/or draft tube two, air capacity A ' after each opening nut of measurement installation in turbosupercharger, and the pressure B ' in draft tube two, and calculate both ratio A '/B ';
In the 3rd step, in the situation that turbocharger operation is worked as A '/B '＞A/Bf1 and A '/B '≤A/Bf2, the draft tube of the actual turbocharged engine system of judgement is little gas leakage; Work as A '/B '＞A/Bf2, the draft tube of the actual turbocharged engine system of judgement is large gas leakage;
In the idle situation of turbosupercharger, work as A '/B '＞A/Bf3, the draft tube of the actual turbocharged engine system of judgement is large gas leakage;
1＜f1≤f2≤f3＜2；
In the situation that turbocharger operation and gas are floored, fault is all reported in little gas leakage, large gas leakage;
In the situation that turbocharger operation and gas are not floored, only fault is reported in large gas leakage;
In the idle situation of turbosupercharger, only to large gas leakage newspaper fault.
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| CN 201010600410 CN102128710B (en) | 2010-12-22 | 2010-12-22 | Air leakage testing device and method for air inlet pipe of turbo supercharged engine |
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| CN 201010600410 CN102128710B (en) | 2010-12-22 | 2010-12-22 | Air leakage testing device and method for air inlet pipe of turbo supercharged engine |
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| CN102128710B true CN102128710B (en) | 2013-06-26 |
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| CN104515655A (en) * | 2013-09-29 | 2015-04-15 | 天津台信检测技术有限公司 | Engine part and whole engine airtightness detection platform |
| CN105352676B (en) * | 2015-09-29 | 2017-11-10 | 北京理工大学 | A kind of supercharger air compressor and turbine gas leakage measuring method |
| CN109374234B (en) * | 2018-12-06 | 2019-08-23 | 中国航发沈阳发动机研究所 | Examine the pilot system and method for becoming circulation compressor adsorption system leakproofness |
| CN109781364B (en) * | 2019-03-28 | 2021-01-19 | 中国飞机强度研究所 | Air leakage detection device and method |
| CN111024331B (en) * | 2019-12-31 | 2022-03-22 | 广西玉柴机器股份有限公司 | Method for simulating different EGR leakage amounts |
| CN111157182B (en) * | 2020-01-15 | 2021-02-19 | 东风汽车集团有限公司 | Engine oil sealing test method of supercharger |
| CN117419858A (en) * | 2023-12-19 | 2024-01-19 | 潍柴动力股份有限公司 | Air leakage detection method and air leakage detection device for air inlet side of engine |
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| KR100435682B1 (en) * | 2001-10-11 | 2004-06-12 | 현대자동차주식회사 | A method for monitoring leakage in an air induction system of a diesel engine provided with an intercoolered turbo-charger |
| CN1594950A (en) * | 2004-06-24 | 2005-03-16 | 徐宗民 | Combustion gas leakage detection valve |
| KR101339216B1 (en) * | 2008-11-25 | 2013-12-09 | 현대자동차 주식회사 | Method for monitoring intake line of diesel engine |
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