WO2000018599A1 - Detecteur de gaz pour vehicules - Google Patents

Detecteur de gaz pour vehicules Download PDF

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Publication number
WO2000018599A1
WO2000018599A1 PCT/JP1999/003202 JP9903202W WO0018599A1 WO 2000018599 A1 WO2000018599 A1 WO 2000018599A1 JP 9903202 W JP9903202 W JP 9903202W WO 0018599 A1 WO0018599 A1 WO 0018599A1
Authority
WO
WIPO (PCT)
Prior art keywords
air
filter
case
gas
passage
Prior art date
Application number
PCT/JP1999/003202
Other languages
English (en)
Japanese (ja)
Inventor
Yoshihide Gunji
Original Assignee
Bosch Automotive Systems Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bosch Automotive Systems Corporation filed Critical Bosch Automotive Systems Corporation
Priority to DE19983611T priority Critical patent/DE19983611T1/de
Publication of WO2000018599A1 publication Critical patent/WO2000018599A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
    • G01N33/0011—Sample conditioning
    • G01N33/0014—Sample conditioning by eliminating a gas

Definitions

  • the present invention relates to a vehicle gas detection device.
  • FIG. 7 is a sectional view of a conventional gas detector for a vehicle.
  • the vehicle gas detector 101 has an air inlet 110 for taking air into the case 105, an air outlet 120 for discharging air from the case 105 to the outside, and air Pass the air passage 130 connecting the intake port 110 and the air discharge port 120, the filter 140 provided in the middle of the air passage 130, and the filter 140.
  • a gas sensor 150 for detecting the concentration of gas in the air that has passed is provided (see Japanese Patent Application Laid-Open No. Hei 8-192716).
  • the upper rear surface 144 of the filter 140 is pressed by the filter holding part 144, and the lower end surface 141 and the rear surface 144 of the filter 140 are subjected to ff pressure by the ribs 144. Thus, a slight gap is formed between the air passage 130 and the inner wall surface 147 of the air passage 130.
  • a drain passage (not shown) extending downward is formed between the side surface of the filter 140 and the inner wall surface of the case 105.
  • this vehicle gas detection device has the following problems. Since the gap formed by the ribs 146 is very small, the gap is closed by water or dust that has entered the air passage 130 together with air, and the air is supplied stably to the gas sensor 150. This may not be possible.
  • the drainage passage is narrow, water is not drained through the drainage passage due to surface tension, and may accumulate in the drainage passage.
  • An object of the present invention is to provide a vehicle gas detection device capable of reliably removing water and dust entering a case and supplying a stable air to a gas sensor.
  • a case an air inlet formed in the case to take in air into the case, and air formed in the case to discharge air in the case to the outside
  • An air outlet formed in the case so as to connect the air inlet and the air outlet
  • a vehicle including a filter disposed in the middle of an air passage and having an end surface on an air intake side, and a gas sensor disposed in the case and detecting a gas concentration of air passing through the filter.
  • a gas detection device is provided.
  • the gas detection device for a vehicle includes a plurality of air introduction paths which form a part of the air passage, and guide the air flowing in from the air intake to the air intake side end face of the filter. And restricting the merging of the air guided to the vicinity of the air intake side end face of the filter through each of the air introduction paths, and the air intake side end face of the filter through the plurality of air introduction paths.
  • the inlet is located at a position higher than the end face on the air intake side of the filter.
  • the air introduced from the air intake located at a position higher than the air intake side end face of the filter is separated from the air intake side of the filter by the end face dividing means.
  • the confluence of air is restricted. Therefore, when the filter has an imbalance in the airflow resistance at the air intake side end face due to water exposure or dust, the air passes through the end face dividing means and has a low airflow resistance from the air introduction path with high airflow resistance. Since the air flows into the air introduction passage, stable air can be supplied to the gas sensor, and the gas concentration can be accurately detected.
  • water separated from the air introduced into the air introduction passage is discharged from a drain hole formed in the lower part of the case.
  • the gas detecting device for a vehicle includes the plurality of airs.
  • a gas-liquid separation unit is provided in the introduction path and separates water from the air introduced into the air introduction path.
  • the air introduction path is provided with the gas-liquid separation means for separating water from the air introduced into the air introduction path
  • water contained in the air introduced into the air introduction path is provided.
  • the dust and the dust are discharged to the outside of the case through the drain hole, so that water and dust can be effectively removed upstream of the air intake side end face of the filter. it can.
  • the gas-liquid separation means comprises a maze structure formed upstream of the filter, in the air introduction path.
  • the maze structure is formed by the end face dividing means and the partition wall in the case.
  • the drainage hole includes a hole that opens in the middle of the air introduction path.
  • the water draining hole includes a hole in the middle of the air introduction path, so that water separated by the gas-liquid separation means is efficiently discharged to the outside through the hole. Is discharged.
  • the drainage hole comprises a hole opening in the vicinity of the end face dividing means. .
  • the drainage hole includes a hole that opens in the vicinity of the end face separating means, the water separated by the end face separating means acting as the gas-liquid separation means is drained. It is discharged outside through the hole.
  • the vehicular gas detection device includes an auxiliary drainage hole that is provided downstream of the filter and discharges water in the case to the outside.
  • the auxiliary drainage hole is provided downstream of the filter, water that has entered downstream of the filter is discharged to the outside from the auxiliary drainage hole.
  • water that has infiltrated into the downstream area of the filter is discharged to the outside through the auxiliary drainage hole, preventing the gas sensor from being flooded and reliably preventing a gas sensor short circuit accident.
  • an auxiliary air passage is provided from the middle of the air introduction passage to the side surface of the filter, and the middle of the passage is narrowed.
  • the auxiliary air passage is provided from the middle of the air introduction passage to the side of the filter, and the middle of the passage is narrowed.
  • air is guided to the filter via the auxiliary air passage. Therefore, air is supplied to the gas sensor, and the gas concentration can be detected.
  • FIG. 1 is a front view of a vehicle gas detection device according to a first embodiment of the present invention.
  • FIG. 2 is a side view of the vehicle gas detector of FIG.
  • FIG. 3 is a bottom view of the vehicular gas detector of FIG.
  • FIG. 4 is a rear view of the vehicle gas detector of FIG.
  • FIG. 5 is a cross-sectional view taken along the line v-V in FIG.
  • FIG. 6 is a sectional view taken along the line VI-VI in FIG.
  • FIG. 7 is a sectional view of a conventional gas detector for a vehicle. BEST MODE FOR CARRYING OUT THE INVENTION
  • FIG. 1 is a front view of a vehicle gas detection device according to a first embodiment of the present invention
  • FIG. 2 is a side view of the vehicle gas detection device of FIG. 1
  • FIG. 3 is a vehicle gas detection device of FIG.
  • Figure 4 is a bottom view of the gas detector
  • Figure 4 is a rear view of the vehicular gas detector of Figure 1
  • Figure 5 is a cross-sectional view taken along the line V-V of Figure 2
  • Figure 6 is a VI- view of Figure 1 VI is a sectional view taken in the direction of the arrows.
  • the vehicle gas detection device 1 includes an air inlet 10, an air outlet 20, an air passage 30, a filter 40, and a gas sensor 50.
  • Case 5 is composed of two cover members 5A and 5B.
  • the air intake 10 is located higher than the air intake side end surface 41 of the filter 40, and the air introduced from the air intake 10 is provided with two independent air introduction passages 3 respectively. It is led to the air intake side end face 41 of the filter 40 through 1.
  • the air introduction passage 31 forms a part of the air passage 30.
  • the air passage 30 is a passage connecting the air inlet 10 and the air outlet 20.
  • the air introduction path 31 is formed symmetrically as viewed from the front of the case 5.
  • the air introduction path 31 is constructed in a maze structure with partition walls (end face dividing means) 32 to 34, and the partition walls 32 to 34 are on the left. Restrict the confluence of air flowing in from the right air inlet 10.
  • the partition walls 32 to 34 are arranged such that a communication path 36 connecting the left and right air introduction passages 31 is formed between the partition wall 32 and the partition walls 33, 34. Is established.
  • the partition wall 3 2 divides the air intake side end face 41 of the filter 40 into two sections.
  • a drain hole 5a is formed at the rear of the partition wall 32 so as to open at the back of the case 5.
  • a maze structure is formed in the middle of the air introduction passage 31 by the partition walls 31a to 31c. This maze structure is different from the maze structure of the communication path 36 formed by the partition walls 32 to 34. Together, they constitute gas-liquid separation means.
  • Drain holes 5b and 5c are formed in the lower part of the case 5 in the middle of the air introduction passage 31 for discharging water separated from the air introduced into the air introduction passage 31 to the outside. I have.
  • auxiliary air passage 35 extending upward from the air introduction passage 31 and communicating with a side surface of the filter 40 is formed in the middle of the air introduction passage 31.
  • a throttle 35a is formed in the auxiliary air passage 35.
  • the air outlet 20 is provided on the upper left side of the case 5 and discharges the air inside the case 5 to the outside.
  • the air outlet 20 has an arc-shaped wall 21 for preventing water from entering the case 5 from the air outlet 20.
  • auxiliary water drain holes 5d for guiding water that has entered the space S, in which the gas sensor 50 is disposed, along the arc-shaped wall 6 and discharging the water to the outside. Is provided.
  • the filter 40 is provided in the middle of an air passage 30 connecting the air inlet 10 and the air outlet 20.
  • the filter 40 is held on the case 5 by a wedge-shaped pin 7 provided on the case 5. At this time, the filter 40 is held by two pins 7 on the downstream side of the air passage 30 and by one pin 7 on the upstream side. That is, each pin 7 is arranged at each vertex of the inverted triangle when viewed from the front of case 5.
  • the gas sensor 50 is attached to the substrate 60 fixed to the case 5, and detects the gas concentration in the air that has passed through the filter 40.
  • Gasuse capacitors 5 0, semiconductor metal oxides (e.g., S n ⁇ 2 to a small amount of precious metal that is added as the main component) and good Ri becomes test known devices, heaters Toka et heating the sensing element to a high temperature It is composed.
  • the air introduced from each air intake 10 is sent to the air intake side end face 41 of the filter 40 via the air introduction path 31.
  • gas-liquid separation is performed by the air introduction passage 31 having a maze structure, and the water separated from the air is discharged to the outside of the case 5 from the drain holes 5b and 5c. .
  • the air that has flowed into the filter 40 from the air intake side end 41 of the filter 40 divided into two by the partition plate 32 passes through the filter 40. Reach space S. At this time, dust is removed.
  • the air is discharged from the air outlet 20.
  • the gas sensor 50 is a gas sensor in the air staying in the space S. Detect the concentration of the gas.
  • the air intake side end faces 41 communicate with each other through a maze structure of a communication path 36 formed by the partition walls 32 to 34, water and dust are discharged from the air intake port 10. If one of the end faces 41 of the air intake side at evening 40 gets wet or clogged, the air that passes through each end face 41 of the air intake side The resistance becomes unbalanced, and the communication path between the partition wall 3 2 and the partition walls 3 3, 3 4 from the air introduction path 31 with high ventilation resistance to the air introduction path 31 with low ventilation resistance from the 1 side Air flows through 3 6.
  • the air introduced from the two air introduction passages 31 flows into the filter 40 from the air intake side end face 41 with low airflow resistance, and flows through the filter 40. Passes through and is discharged from air outlet 20.
  • the gas concentration in the air staying in the space S is detected by the gas sensor 50.
  • Gas-liquid separation is also performed by the partition walls 32, 33, and 34, and water separated from the air is discharged to the outside of the case 5 from the drain hole 5a.
  • the water that has entered the space S is discharged to the outside of the case 5 through the auxiliary drain hole 5d. .
  • the water that has entered the space S can be drained through the auxiliary drain hole 5d, and water does not stay in the space S where the gas sensor 50 is installed. It can be reliably prevented.
  • the air intake side end surface 41 is divided into two, but may be divided into three or more according to the number of air introduction paths. Industrial applicability.
  • the vehicular gas detection device of the present invention when the air is imbalanced in the ventilation resistance of the air intake side end face due to water or dust, air passes through the end face dividing means. Since the air flows from the air introduction channel with a large ventilation resistance to the air introduction channel with a small ventilation resistance, a stable air supply to the gas sensor can be achieved, and the gas concentration can be accurately detected.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Combustion & Propulsion (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

La présente invention concerne un détecteur de gaz pour véhicules pouvant éliminer de manière sûre l'eau et la poussière accumulées dans un boîtier, et fournir de l'air stable dans un détecteur de gaz. Une résistance à l'écoulement de l'air traversant chaque surface terminale du côté de l'amenée d'air (41) se déséquilibre lorsque l'eau et la poussière pénètrent par les amenées d'air (10). L'une des surfaces terminales du côté de l'amenée d'air (41) d'un filtre (40) divisée en deux parties est immergée dans l'eau, ou obstruée. L'air s'écoulant du côté d'un chemin d'amenée d'air (31) présentant une résistance supérieure à l'écoulement par un passage de communication (36) cloisonné (32 à 34) aboutit du côté du chemin d'amenée d'air (31), présentant une moindre résistance à l'écoulement. Ainsi, l'air amené depuis les deux chemins d'amenée d'air (31) présentant une résistance supérieure s'écoule depuis la surface terminale du côté d'amenée d'air (41) présentant une moindre résistance à l'écoulement pour arriver dans un filtre (40) qu'il traverse de manière à en éliminer la poussière. L'air est déchargé par un orifice de décharge (20) après avoir été accumulé dans un espace (S) où le détecteur de gaz (50) est disposé, le détecteur de gaz (50) détectant la concentration de gaz dans l'air accumulé dans l'espace (S).
PCT/JP1999/003202 1998-09-28 1999-06-16 Detecteur de gaz pour vehicules WO2000018599A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19983611T DE19983611T1 (de) 1998-09-28 1999-06-16 Gasdetektiervorrichtung für Fahrzeuge mit Eigenantrieb

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP27298698A JP2942256B1 (ja) 1998-09-28 1998-09-28 車両用ガス検出装置
JP10/272986 1998-09-28

Publications (1)

Publication Number Publication Date
WO2000018599A1 true WO2000018599A1 (fr) 2000-04-06

Family

ID=17521561

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1999/003202 WO2000018599A1 (fr) 1998-09-28 1999-06-16 Detecteur de gaz pour vehicules

Country Status (3)

Country Link
JP (1) JP2942256B1 (fr)
DE (1) DE19983611T1 (fr)
WO (1) WO2000018599A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7189363B2 (en) 2002-05-24 2007-03-13 Ngk Spark Plug Co., Ltd. Gas detector

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004111627A1 (fr) * 2003-06-12 2004-12-23 Fis Inc. Detecteur de gaz de vehicule automobile
CN105522887B (zh) * 2015-05-14 2018-01-12 株式会社电装 车用空调装置
WO2018117828A1 (fr) * 2016-12-23 2018-06-28 Hubtech B.V. Roue de véhicule, notamment roue de bicyclette, moyeu pour une telle roue et véhicule équipé d'une telle roue

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08192617A (ja) * 1994-11-17 1996-07-30 Nippondenso Co Ltd 車両用ガス検出装置
JPH09274003A (ja) * 1996-04-08 1997-10-21 Denso Corp ガス検出装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08192617A (ja) * 1994-11-17 1996-07-30 Nippondenso Co Ltd 車両用ガス検出装置
JPH09274003A (ja) * 1996-04-08 1997-10-21 Denso Corp ガス検出装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7189363B2 (en) 2002-05-24 2007-03-13 Ngk Spark Plug Co., Ltd. Gas detector
DE10323884B4 (de) * 2002-05-24 2007-08-02 NGK Spark Plug Co., Ltd., Nagoya Gasdetektor

Also Published As

Publication number Publication date
JP2942256B1 (ja) 1999-08-30
JP2000094943A (ja) 2000-04-04
DE19983611T1 (de) 2002-06-06

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