EP2977593B1 - Air intake device for engine for two-wheeled motor vehicle - Google Patents

Air intake device for engine for two-wheeled motor vehicle Download PDF

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Publication number
EP2977593B1
EP2977593B1 EP14770552.9A EP14770552A EP2977593B1 EP 2977593 B1 EP2977593 B1 EP 2977593B1 EP 14770552 A EP14770552 A EP 14770552A EP 2977593 B1 EP2977593 B1 EP 2977593B1
Authority
EP
European Patent Office
Prior art keywords
air intake
sensor
pressure
throttle
path
Prior art date
Legal status (The legal status 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 status listed.)
Active
Application number
EP14770552.9A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2977593A1 (en
EP2977593A4 (en
Inventor
Daichi INAGAKI
Shinichirou MORITA
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Keihin Corp
Original Assignee
Keihin Corp
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Filing date
Publication date
Application filed by Keihin Corp filed Critical Keihin Corp
Publication of EP2977593A1 publication Critical patent/EP2977593A1/en
Publication of EP2977593A4 publication Critical patent/EP2977593A4/en
Application granted granted Critical
Publication of EP2977593B1 publication Critical patent/EP2977593B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
    • F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
    • F02D9/1035—Details of the valve housing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
    • F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
    • F02D9/1035—Details of the valve housing
    • F02D9/105—Details of the valve housing having a throttle position sensor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10373—Sensors for intake systems
    • F02M35/1038—Sensors for intake systems for temperature or pressure

Definitions

  • the present invention relates to an improvement of an air intake device for an engine for a two-wheeled motor vehicle, the air intake device including a throttle body that has a horizontal air intake path in a central part thereof, a throttle valve that has a valve shaft horizontally supported on the throttle body and that opens and closes the air intake path, and a sensor unit that includes, attached to a sensor housing mounted on a mounting face on one side of the throttle body, an air intake temperature sensor that detects an air intake temperature of the air intake path further upstream than the throttle valve, and a negative pressure sensor that detects an air intake negative pressure of the air intake path further downstream than the throttle valve.
  • EP 1 947 317 A1 shows an air intake device according to the preamble of claim 1.
  • JP H03-122246 U shows the passage extending long in the axial direction of air intake passage defined in the throttle body.
  • the throttle body must be formed thick in order to have such long passage formed therein as a whole.
  • the present invention has been accomplished in light of such points, and it is an object thereof to provide an air intake device for an engine for a two-wheeled motor vehicle that enables the dimension in the axial direction of a throttle body to be reduced and enables the sensor housing to be made compact.
  • an air intake device for an engine for a two-wheeled motor vehicle according to claim 1.
  • the device further comprises a throttle sensor that is on an axis of the valve shaft of the throttle valve and that detects rotation of the valve shaft as a degree of opening of the throttle valve, the center of the throttle sensor being disposed on one of the apexes of a triangle where the axis of the valve shaft is positioned.
  • the sensor chip is disposed so as to be offset higher than a part of the air intake pressure-transmitting passage that opens in the pressure-receiving chamber.
  • the air intake temperature sensor and the air intake pressure sensor are disposed so that their centers are positioned on apexes of the triangle including the axis of the valve shaft in the sensor housing further upstream in the air intake path than the axis of the valve shaft, the air intake temperature sensor, and the air intake pressure sensor are disposed in a concentrated manner further upstream in the air intake path than the axis of the valve shaft in the sensor housing, and it therefore becomes possible to reduce the axial length of the throttle body further downstream in the air intake path than the valve shaft without interfering with the air intake pressure sensor in particular, and it also becomes possible to make the throttle body compact, lighten the weight, and at the same time make the sensor housing compact.
  • the air intake pressure sensor is disposed so that its center is at the uppermost apex of the triangle, the pressure-receiving chamber of the air intake pressure sensor, which the sensor chip faces, communicates with the detection hole, which opens in the air intake path further downstream than the throttle valve, via the air intake pressure-transmitting passage, a part of which goes by way of a position above the axis of the air intake path, the part of the air intake pressure-transmitting passage opening in the pressure-receiving chamber is disposed above the part of the detection hole opening in the air intake path, and the part of the detection hole opening in the air intake path is disposed above the axis of the air intake path.
  • the part of the air intake pressure-transmitting passage opening in the pressure-receiving chamber occupies a position above the part of the detection hole opening in the air intake path
  • the part of the detection hole opening in the air intake path occupies a position above the axis of the air intake path
  • the part of the air intake pressure-transmitting passage extending from the detection hole to the pressure-receiving chamber of the air intake pressure sensor is one that is long and goes by way of a position above the axis of the air intake path.
  • the detection hole is formed into a longitudinal groove shape that opens on the downstream side end face of the throttle body, to which the air intake tube of the engine is joined, and the air intake pressure-transmitting passage is formed from the first sideways hole, which bends from the upper end of the detection hole and extends in the upstream side direction of the air intake path, the second sideways hole, which bends from the first sideways hole and heads toward the mounting face, the through groove in the mounting face, which bends from the second sideways hole and extends so as to cross above the valve shaft, and the third sideways hole, which bends from the through groove and opens in the pressure-receiving chamber, it is difficult for foreign matter such as soot or moisture contained in blow-back gas of the engine to enter the detection hole.
  • the throttle sensor since the center of the throttle sensor is disposed on the axis of the valve shaft which is one of the apexes of the triangle, the throttle sensor, together with the air intake temperature sensor and the air intake pressure sensor, is disposed in a concentrated manner further upstream in the air intake path than the axis of the valve shaft, and it therefore becomes possible to reduce the axial length of the throttle body further, and it also becomes possible to make the throttle body further compact, lighten the weight, and make the sensor housing further compact.
  • the sensor chip is disposed so as to be offset higher than the part of the air intake pressure-transmitting passage that opens in the pressure-receiving chamber, even if the foreign matter enters the pressure-receiving chamber from the air intake pressure-transmitting passage, since the sensor chip, which faces the pressure-receiving chamber, is disposed so as to be offset higher than the third sideways hole, it is possible to prevent foreign matter that has dropped from the air intake pressure-transmitting passage into the pressure-receiving chamber from coming into contact with the sensor chip.
  • the air intake device for an engine for a two-wheeled motor vehicle of the present invention includes a throttle body 1 connected to an air intake tube 55 of the engine, and a horizontal air intake path 2 communicating with the interior of the air intake tube 55 is formed in a central part of the throttle body 1, the air intake path 2 extending in the fore-and-aft direction of the vehicle.
  • a pair of bearing holes 3 and 4 are formed in a peripheral wall of the throttle body 1 so as to be arranged in the horizontal direction with the air intake path 2 sandwiched therebetween; these bearing holes 3 and 4 rotatably support a valve shaft 5a of a butterfly type throttle valve 5 that opens and closes the air intake path 2, and this valve shaft 5a is disposed horizontally so as to extend in the left-and-right direction of the vehicle.
  • Fixed to one end part of the valve shaft 5a projecting outward from the bearing hole 3 is a throttle drum 8 that is operated by an operator via a throttle wire.
  • a mounting face 15 is formed on a side face of the throttle body 1 on the opposite side to the throttle drum 8, the mounting face 15 being stepped higher than other faces, and a sensor unit 16 is mounted on the mounting face 15.
  • the sensor unit 16 is formed by mounting a throttle sensor 18, an air intake temperature sensor 19, an air intake pressure sensor 20, and a signal processor 21 on a sensor housing 17 joined to the mounting face 15, these components being explained in sequence.
  • the sensor housing 17 integrally has a pair of mounting bosses 25 and 25 on mutually opposing corners of the outer periphery, threaded holes 26 corresponding to these mounting bosses 25 and 25 are provided in the mounting face 15, and the sensor housing 17 is secured to the mounting face 15 by screwing and tightening a bolt 27 inserted through the respective mounting boss 25 into the corresponding threaded hole 26.
  • the sensor housing 17 is made of a synthetic resin, and a positioning tube 51 fitted into the positioning recess 50 (see FIG. 1 ) and a positioning pin 53 fitted into the positioning hole 52 (see FIG. 3 ) are formed together with the mounting bosses 25 at the time of molding the sensor housing 17.
  • a rotor support hole 28 disposed coaxially with the bearing hole 4, rotatably supported by the rotor support hole 28 is a rotor 18a linked to an end part of the valve shaft 5a, and fixed to the sensor housing 17 is a stator 18b that forms the throttle sensor 18 in cooperation with the rotor 18a.
  • the throttle sensor 18 detects rotation of the valve shaft 5a as a degree of opening of the throttle valve 5 by means of the rotor 18a and outputs an electric signal corresponding thereto via the stator 18b.
  • a through hole 29 extending from the mounting face 15 to the air intake path 2 further upstream than the throttle valve 5, formed integrally with the sensor housing 17 is a sensor-retaining tube 30 extending through the through hole 29 and having its extremity facing the air intake path 2, and fitted into the sensor-retaining tube 30 is a sensor chip 19a of the air intake temperature sensor 19 that detects the air intake temperature on the upstream side of the air intake path 2.
  • a sensor-retaining recess 31 is formed in an outside face of the sensor housing 17, and the air intake pressure sensor 20 is fitted into the sensor-retaining recess 31.
  • the air intake temperature sensor 19 is disposed further upstream in the air intake path 2 than the throttle sensor 18, and the air intake pressure sensor 20 is disposed further upstream in the air intake path 2 than the throttle sensor 18 and above the air intake temperature sensor 19.
  • the throttle sensor 18, the air intake temperature sensor 19, and the air intake pressure sensor 20 are disposed so that their centers are positioned on the apexes of a triangle 35 further upstream in the air intake path 2 than an axis Y of the valve shaft 5a of the sensor housing 17, and the air intake pressure sensor 20 is disposed so that the center thereof is at the uppermost apex.
  • the uppermost apex is disposed above the axis of the air intake path 2.
  • a detection hole 37 communicates with a pressure-receiving chamber 20a via an air intake pressure-transmitting passage 38, a sensor chip 20b of the air intake pressure sensor 20 facing the pressure-receiving chamber 20a, and the detection hole 37 opening downward in the air intake path 2 further downstream than the throttle valve 5.
  • the part of the detection hole 37 opening in the air intake path 2 is disposed above the axis of the air intake path 2.
  • the detection hole 37 is formed into a longitudinal groove shape on a downstream side end face of the throttle body 1 to which the air intake tube 55 is joined.
  • the air intake pressure-transmitting passage is formed from a first sideways hole 38a that bends from the upper end of the detection hole 37 and extends in the upstream side direction (that is, rearward) of the air intake path 2, a second sideways hole 38b that bends from the first sideways hole 38a and heads toward the mounting face 15, a through groove 38c in the mounting face 15 that bends from the second sideways hole 38b and extends so as to pass a position above the axis of the air intake path 2, and a third sideways hole 38d that bends from the through groove 38c and opens in the pressure-receiving chamber 20a.
  • the third sideways hole 38d is provided with an orifice 39 that attenuates pulsations of the air intake pressure.
  • the sensor chip 20b which faces the pressure-receiving chamber 20a, is disposed so as to be offset higher than the third sideways hole 38d (see FIG. 4 ).
  • the detection hole 37, the first and second sideways holes 38a and 38b, and the through groove 38c are provided in the throttle body 1, and the third sideways hole 38d is provided in the sensor housing 17. In this way, the part of the air intake pressure-transmitting passage 38 that opens in the pressure-receiving chamber 20a is disposed above the part of the detection hole 37 opening in the air intake path 2.
  • An O ring 40 is fitted into a downstream side end face of the throttle body 1, the O ring 40 being in intimate contact with the air intake tube 55 while surrounding the air intake path 2 and the detection hole 37, and an O ring 41 is fitted into the mounting face 15, the O ring 41 being in intimate contact with the sensor housing 17 while surrounding the throttle sensor 18 and the through groove 38c.
  • a board 45 of the signal processor 21 is placed on an outer end part of the sensor housing 17.
  • terminals of the throttle sensor 18, the air intake temperature sensor 19, and the air intake pressure sensor 20 are connected to the board 45.
  • a coupler 47 is formed integrally with one side of the sensor housing 17, the coupler 47 taking out output signals of the various types of sensors 18 to 20 to the outside via the signal processor 21.
  • Mounted on the sensor housing 17 is a cover 48 that covers an open outside face of the sensor housing 17.
  • output signals of each of the throttle sensor 18, the air intake temperature sensor 19, and the air intake pressure sensor 20 are used to control the fuel injection volume, the ignition timing, the fast idle air intake volume, etc. in the engine.
  • the throttle sensor 18, the air intake temperature sensor 19, and the air intake pressure sensor 20 are disposed so that their centers are positioned on apexes of the triangle 35 in the sensor housing 17 further upstream in the air intake path 2 than the axis Y of the valve shaft 5a of the throttle valve 5, the throttle sensor 18, the air intake temperature sensor 19, and the air intake pressure sensor 20 are disposed in a concentrated manner further upstream in the air intake path 2 than the axis Y of the valve shaft 5a in the sensor housing 17, and it therefore becomes possible to reduce the axial length of the throttle body 1 further downstream in the air intake path 2 than the valve shaft 5a without interfering with the air intake pressure sensor 20 in particular, and it also becomes possible to make the throttle body 1 compact, lighten the weight, and at the same time make the sensor housing 17 compact.
  • the air intake pressure sensor 20 is disposed so that its center is at the uppermost apex of the triangle, the pressure-receiving chamber 20a of the air intake pressure sensor 20, which the sensor chip 20b faces, communicates with the detection hole 37, which opens in the air intake path 2 further downstream than the throttle valve 5, via the air intake pressure-transmitting passage 38, a part of which goes by way of a position above the axis of the air intake path 2, the part of the air intake pressure-transmitting passage 38 opening in the pressure-receiving chamber 20a is disposed above the part of the detection hole 37 opening in the air intake path 2, and the part of the detection hole 37 opening in the air intake path 2 is disposed above the axis of the air intake path 2.
  • the part of the air intake pressure-transmitting passage 38 opening in the pressure-receiving chamber 20a occupies a position above the part of the detection hole opening in the air intake path 2
  • the part of the detection hole 37 opening in the air intake path 2 occupies a position above the axis of the air intake path 2
  • the part of the air intake pressure-transmitting passage 38 extending from the detection hole 37 to the pressure-receiving chamber 20a of the air intake pressure sensor 20 is one that is long and goes by way of a position above the axis of the air intake path 2.
  • the detection hole 37 is formed into a longitudinal groove shape that opens on the downstream side end face of the throttle body 1, to which the air intake tube 55 of the engine is joined, and the air intake pressure-transmitting passage 38 is formed from the first sideways hole 38a, which bends from the upper end of the detection hole 37 and extends in the upstream side direction of the air intake path 2, the second sideways hole 38b, which bends from the first sideways hole 38a and heads toward the mounting face 15, the through groove 38c in the mounting face 15, which bends from the second sideways hole 38b and extends so as to cross above the valve shaft 5a, and the third sideways hole 38d, which bends from the through groove 38c and opens in the pressure-receiving chamber 20a, it is difficult for foreign matter such as soot or moisture contained in blow-back gas of the engine to enter the detection hole 37.
  • the air intake pressure sensor 20 to always appropriately detect the air intake pressure of the downstream side of the air intake path 2.
  • the longitudinal groove-shaped detection hole 37 and the through groove 38c can be molded at the same time as casting the throttle body 1 and, moreover, the longitudinal groove-shaped detection hole 37 contributes to a reduction in the axial length of the throttle body 1 further downstream in the air intake path 2 than the valve shaft 5a.
  • the detection hole 37 opening in the air intake path 2 is disposed so as to be relatively close to the valve shaft 5a when the air intake path 2 is viewed from the axial direction of the valve shaft 5a, at the time of an idle degree of opening of the throttle valve 5, the detection hole 37 can be sufficiently separated from the throttle valve 5 to the downstream side without particularly extending the downstream side end part of the throttle body 1 with respect to the throttle valve 5, and it is possible to appropriately detect a boost pressure of the engine.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
EP14770552.9A 2013-03-21 2014-03-11 Air intake device for engine for two-wheeled motor vehicle Active EP2977593B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013057732A JP6020916B2 (ja) 2013-03-21 2013-03-21 自動二輪車用エンジンの吸気装置
PCT/JP2014/056254 WO2014148302A1 (ja) 2013-03-21 2014-03-11 自動二輪車用エンジンの吸気装置

Publications (3)

Publication Number Publication Date
EP2977593A1 EP2977593A1 (en) 2016-01-27
EP2977593A4 EP2977593A4 (en) 2017-01-25
EP2977593B1 true EP2977593B1 (en) 2018-09-12

Family

ID=51579989

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14770552.9A Active EP2977593B1 (en) 2013-03-21 2014-03-11 Air intake device for engine for two-wheeled motor vehicle

Country Status (5)

Country Link
EP (1) EP2977593B1 (ja)
JP (1) JP6020916B2 (ja)
CN (1) CN105189987B (ja)
BR (1) BR112015023654B1 (ja)
WO (1) WO2014148302A1 (ja)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI616587B (zh) * 2014-08-26 2018-03-01 Kwang Yang Motor Co Engine throttle body structure
CN105464815B (zh) * 2014-08-29 2020-03-24 光阳工业股份有限公司 引擎节流阀体结构
DE102016101622B4 (de) * 2016-01-29 2021-10-21 Pierburg Gmbh Abgasregelvorrichtung für eine Verbrennungskraftmaschine
IT201700060141A1 (it) * 2017-06-01 2018-12-01 Magneti Marelli Spa Valvola a farfalla per un motore a combustione interna e provvista di un sensore di pressione e di un sensore di temperatura
JP2022017602A (ja) 2018-10-11 2022-01-26 ヤマハ発動機株式会社 単一の燃焼室用スロットルボディアセンブリ
JP7444616B2 (ja) * 2020-01-17 2024-03-06 株式会社ミクニ スロットル装置
JP2022082388A (ja) * 2020-11-20 2022-06-01 株式会社ミクニ バタフライ弁装置

Family Cites Families (13)

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Publication number Priority date Publication date Assignee Title
JPS6081234U (ja) * 1983-11-08 1985-06-05 愛三工業株式会社 電子制御式燃料噴射装置におけるセンサ取付構造
JPS62162360U (ja) * 1986-04-04 1987-10-15
JPH03122246U (ja) * 1990-03-26 1991-12-13
JP4289691B2 (ja) * 1997-08-21 2009-07-01 株式会社日本自動車部品総合研究所 吸気管圧力検出装置
JP2002089348A (ja) * 2000-09-19 2002-03-27 Keihin Corp スロットル装置
JP4474080B2 (ja) * 2001-08-31 2010-06-02 本田技研工業株式会社 エンジンの吸気量制御装置
JP4065115B2 (ja) * 2001-08-31 2008-03-19 株式会社ケーヒン エンジンの吸気量制御装置
TW200422514A (en) * 2003-02-20 2004-11-01 Mikuni Kogyo Kk Sensor module unit and throttle device with the same
BRPI0415832A (pt) * 2003-10-22 2007-01-02 Mikuni Kogyo Kk dispositivo de entrada de ar, unidade de sensor, veìculo de duas rodas e método de detecção de temperatura de ar de entrada
JP2005155515A (ja) * 2003-11-27 2005-06-16 Mikuni Corp スロットル装置
JP4191721B2 (ja) * 2005-11-07 2008-12-03 株式会社ケーヒン エンジンの吸気装置
EP1947317A4 (en) * 2005-11-07 2014-12-24 Keihin Corp AIR INTAKE DEVICE FOR A MOTOR
JP4635924B2 (ja) * 2006-03-22 2011-02-23 株式会社デンソー 吸気モジュール

Non-Patent Citations (1)

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Title
None *

Also Published As

Publication number Publication date
WO2014148302A1 (ja) 2014-09-25
EP2977593A1 (en) 2016-01-27
CN105189987A (zh) 2015-12-23
CN105189987B (zh) 2018-11-13
EP2977593A4 (en) 2017-01-25
JP2014181646A (ja) 2014-09-29
JP6020916B2 (ja) 2016-11-02
BR112015023654B1 (pt) 2022-03-15
BR112015023654A2 (pt) 2017-07-18

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