EP1482149B1 - Agencement d'un capteur pour un moteur à combustion interne - Google Patents

Agencement d'un capteur pour un moteur à combustion interne Download PDF

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Publication number
EP1482149B1
EP1482149B1 EP04253156A EP04253156A EP1482149B1 EP 1482149 B1 EP1482149 B1 EP 1482149B1 EP 04253156 A EP04253156 A EP 04253156A EP 04253156 A EP04253156 A EP 04253156A EP 1482149 B1 EP1482149 B1 EP 1482149B1
Authority
EP
European Patent Office
Prior art keywords
sensor
crankcase
cover member
wall
engine
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.)
Expired - Lifetime
Application number
EP04253156A
Other languages
German (de)
English (en)
Other versions
EP1482149A1 (fr
Inventor
Azmi Yamaha Engine Developments Co.Ltd. Osman
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.)
Petroliam Nasional Bhd Petronas
Original Assignee
Petroliam Nasional Bhd Petronas
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 Petroliam Nasional Bhd Petronas filed Critical Petroliam Nasional Bhd Petronas
Publication of EP1482149A1 publication Critical patent/EP1482149A1/fr
Application granted granted Critical
Publication of EP1482149B1 publication Critical patent/EP1482149B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/08—Safety, indicating, or supervising devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P7/00—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices
    • F02P7/06—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices of circuit-makers or -breakers, or pick-up devices adapted to sense particular points of the timing cycle
    • F02P7/067—Electromagnetic pick-up devices, e.g. providing induced current in a coil
    • F02P7/0677—Mechanical arrangements

Definitions

  • This invention relates to a sensor mounting structure for an engine.
  • a sensor is mounted to an outer wall of a crankcase.
  • a conventional sensor mounting structure for an engine is disclosed in JP-A-Hei 6-288329.
  • the engine has a crankcase, a crankshaft supported with the crankcase to rotate around an axis extending approximately in the horizontal direction, a cylinder supported on a top of the crankcase, and a sensor mounted to an outer wall of the crankcase for detecting engine driving conditions.
  • the sensor a crank angle detecting sensor, is mounted to the outer wall of the crankcase above the axis of the crankshaft.
  • the sensor includes a protrusion that protrudes outward from the outer wall of the crankcase.
  • the protrusion of the sensor is provided in a space between an outer surface of the crankcase and an inner surface of a flywheel fixedly attached to an end of the crankshaft.
  • the sensor detects a crank angle and ignition timing is determined generally based on the output signal so that the engine can obtain a desired driving condition.
  • the sensor described in the above prior art is mounted to the outer wall of the crankcase above the axis of the crankshaft. This results in the sensor being placed closer to the outer wall of the cylinder. In addition to that, the protrusion of the sensor protrudes outward from the outer wall of the crankcase, facing the cylinder.
  • the cylinder is heated to high temperature due to the engine driving.
  • exhaust pipes extending from the cylinder are generally provided in an area adjacent to the outer side of the crankcase and the cylinder.
  • the protrusion of the sensor faces the exhaust pipes which are also heated to high temperature. This causes the protrusion of the sensor to tend to be subjected to high radiant heat generated by the cylinder and the exhaust pipes, which may involve a problem with sensor service life.
  • the sensor described in the prior art is also covered from the outside with the flywheel, which interferers with works including mounting of the sensor to the crankcase and sensor maintenance. This causes these works to be more complicated.
  • JP07286537 Another conventional sensor mounting is disclosed in JP07286537 in which the sensor 32 is mounted away from the pistion, below the crank axis.
  • This invention is made in view of the preceding circumstances, and the object of examples is to provide a sensor mounting structure to prevent the sensor mounted to the outer wall of the crankcase from being subjected to radiant heat generated by the cylinder and the exhaust pipes, and to facilitate works including mounting of the sensor to the crankcase and the sensor maintenance.
  • a sensor mounting structure for an engine is as follows.
  • Reference numerals denoting the terms herein are not to be interpreted as a limitation of the technical scope of the present invention to the descriptions of embodiments of the invention to be discussed later, or as a limitation in any way.
  • crankcase (2) with a sensor (25) according to claim 1.
  • the engine has exhaust pipes 10 provided in an area adjacent to the outer side of the crankcase 2, wherein the cover member 29 is provided between the exhaust pipes 10 and the sensor 25.
  • the cover member 29 is placed so as to cover the sensor 25 from below.
  • the engine has the crankcase 2 including upper and lower cases 13 and 14 which are separated approximately relative to the axis 3 of the crankshaft 4, the lower case 14 having the outer wall 11 comprising a vertical wall 16 extending vertically, upper and lower outward flanges 17 and 18 formed integrally with upper and lower edges of the vertical wall 16, respectively, and ribs 20 formed integrally with an outer surface of the vertical wall 16 and vertically extending; wherein at least any one of the upper and lower outward flanges 17 and 18, and the rib 20 integrally extends outward from the crankcase 2 to form the cover member 29.
  • reference numeral 1 designates a multi-cylinder (four-cylinder) four-cycle engine (internal combustion engine) mounted on a vehicle such as an automobile.
  • the engine 1 has a crankcase 2 supported on a vehicle body, a crankshaft 4 supported with the crankcase 2 to rotate around an axis 3 extending approximately in the horizontal direction, a cylinder 6 integrally attached to and supported with the top of the crankcase 2, an oil pan 8 attached to and supported with the bottom of the crankcase 2, intake pipes 9 extending outward in the radial direction of the crankshaft 4 from one side of the cylinder 6, and exhaust pipes 10 extending outward from the other side of the cylinder 6 and then extending downward.
  • the exhaust pipes 10 each have an extending portion provided across an area adjacent to the outer side of the other side of the cylinder 6, and an area adjacent to the outer side of the outer wall 11 of the crankcase 2 and continuing below the other side of the cylinder 6.
  • the extending portions of the respective exhaust pipes 10 are provided in the axial direction of the crankshaft 4 in an area adjacent to the outer side of an approximate midsection between the crankcase 2 and the cylinder 6.
  • the crankcase 2 includes an upper case 13 and a lower case 14 which are separated approximately relative to the axis 3 of the crankshaft 4.
  • the crankshaft 4 is supported between the upper case 13 and the lower case 14.
  • the lower case 14 is a bulkhead or rudder frame.
  • the outer wall 11 of the lower case 14 comprises a vertical wall 16 extending vertically, upper and lower outward flanges 17 and 18 integrally formed with upper and lower edges of the vertical wall 16 respectively, an edge outward flange 19 integrally formed with an edge of the vertical wall 16 in the axial direction of the crankshaft 4, and plural ribs 20 integrally formed with the outer surface of the vertical wall 16 and vertically extending to reinforce the vertical wall 16.
  • the bottom of the upper case 13 and the upper outward flange 17 of the lower case 14 are fastened to each other with a fastener 22.
  • the engine 1 comprises a sensor 25 mounted to the outer wall 11 of the crankcase 2 with a fastener 24 for detecting engine driving conditions, and a disc-shaped detected element 26 to be detected by the sensor 25, which rotates with the crankshaft 4.
  • the sensor 25, a crank angle detecting sensor, uses a magnetic sensor or an optical sensor. On an outer circumferential surface of the detected element 26 are formed multiple detected teeth.
  • the sensor 25 outputs an electrical pulse signal as a detection signal every time each detected tooth approaches the sensor 25.
  • the sensor 25 outputs a crankshaft angle detection signal. Ignition timing is determined based on the detection signal, which allows the engine 1 to be driven under desired conditions.
  • the sensor 25 is mounted to the vertical wall 16 of the outer wall 11 of the lower case 14 provided below the axis 3 of the crankshaft 4.
  • the sensor 25 is mounted to the end on the edge outer flange 19 in the axial direction of the crankshaft 4.
  • the sensor 25 includes a protrusion 25a protruding outward from the vertical wall 16 of the outer wall 11 of the lower case 14.
  • a cover member 29 for covering the protrusion 25a of the sensor 25 from the outside is integrally formed to protrude outward from the outer wall 11 of the lower case 14 in the direction along the outer surface of the outer wall 11 of the crankcase 2.
  • the cover member 29 comprises upper and lower cover members 30 and 31 formed by integrally extending outer peripheries of the upper and lower outward flanges 17 and 18 outward from the lower case 14 of the crankcase 2, and a side cover member 32 formed by extending an outer periphery of one of the ribs 20, which is adjacent to the edge outward flange 19 in the axial direction of the crankshaft 4.
  • the sensor 25 is provided in a space 33 enclosed by the edge outward flange 19, the upper cover member 30, the lower cover member 31, and the side cover member 32.
  • the space 33 is opened to the outside of the lower case 14 of the crankcase 2.
  • the sensor 25 can be inserted in the space 33 through its opening.
  • the space 33 is used as a part of the working space to mount the sensor 25 to the lower case 14 and maintain the sensor 25.
  • the senor 25 is mounted to the outer wall 11 of the crankcase 2 below the axis 3 of the crankshaft 4.
  • the cover member 29 for covering at least a part of the sensor 25 from the outside is integrally formed to protrude outward from the outer wall 11 of the crankcase 2 in the direction along the outer surface of the crankcase 2.
  • the cover member 29 can therefore prevent the radiant heat generated by the cylinder 6 and the exhaust pipes 10 in the direction along the outer surface of the crankcase 2 from reaching the protrusion 25a of the sensor 25. This can avoid the protrusion 25a of the sensor 25 from being subjected to the radiant heat more reliably.
  • the cover member 29 covers the protrusion 25a of the sensor 25 as described above, which also prevents the sensor 25 from being accidentally subjected to external forces generated by objects external to the sensor 25 during assembly and the deliveries of the engine 1. The sensor 25 is therefore protected from these external forces, and from damage.
  • cover member 29 integrally protrudes outward from the outer wall 11 of the crankcase 2, which differs from the conventional art in which the sensor 25 is covered from the outside. This can prevent the cover member 29 from interfering with works, including mounting of the sensor 25 to the outer wall 11 of the crankcase 2 and maintenance of the sensor 25, to be performed from the outside of the crankcase 2, which facilitates these works.
  • the upper cover member 30 and the side cover member 32 of the cover member 29 are provided between the exhaust pipes 10 and the protrusion 25a of the sensor 25.
  • the lower cover member 31 of the cover member 29 is placed so as to cover the sensor 25 from below.
  • the lower cover member 31 of the cover member 29 prevents small stones thrown up by the wheels while driving from hitting the sensor 25, which avoid damage to the sensor 25.
  • the cover member 29 is formed by allowing the upper and lower outward flanges 17 and 18, and the ribs 20 to integrally extend outward from the crankcase 2.
  • the cover member 29 is formed with the upper and lower outward flanges 17 and 18, and the ribs 20. This means that the sensor 25 can be prevented from being subjected to heat and being damaged by the simply-structured cover member 29.
  • the upper and lower outward flanges 17 and 18, and the ribs 20 have high strength for their functions. Accordingly, the cover member 29 formed with them can readily have high strength. Therefore, the cover member 29 can more reliably prevent the sensor 25 from being damaged due to external forces.
  • the lower outward flange 18 and the lower cover member 31 have the respective bottom surfaces flush with each other.
  • the lower cover member 31 of the cover member 29 is placed on the workbench. This allows the lower cover member 31 to be used to fix the lower case 14 thereto with the cramps.
  • the senor 25 may be mounted to the outer wall 11 constituting an end face of the crankcase 2 in the axial direction of the crankshaft 4.
  • the cover member 29 may be provided separately from the upper and lower outward flanges 17 and 18, and the ribs 20.
  • the protrusion 25a of the sensor 25, which protrudes from the outer wall 11 of the crankcase 2, may be smaller in dimension than that of the cover member 29. This can more reliably prevent the protrusion 25a of the sensor 25 from being subjected to the external radiant heat and being damaged due to the external forces.
  • An aspect of the present invention provides a sensor mounting structure for an engine having a crankcase, a crankshaft supported with the crankcase to rotate around an axis extending approximately in the horizontal direction, a cylinder supported on a top of the crankcase, and a sensor, mounted to an outer wall of the crankcase, for detecting engine driving conditions; wherein the sensor is mounted to the outer wall of the crankcase below the axis of the crankshaft.
  • the cover member for covering the sensor from the outside is preferably integrally formed to protrude outward from the outer wall of the crankcase in the direction along the outer surface of the crankcase.
  • a cover member can therefore prevent the radiant heat generated by the cylinder and the exhaust pipes in the direction along the outer surface of the crankcase from reaching the sensor. This can avoid the sensor from being subjected to the radiant heat more reliably.
  • the cover member preferably covers the sensor as described above, which also prevents the sensor from being accidentally subjected to external forces generated by objects external to the sensor during engine assembly and the deliveries. The sensor is therefore protected from these external forces, and from damage.
  • the cover member preferably integrally protrudes outward from the outer wall of the crankcase, which differs from the conventional art in which the sensor is covered from the outside. This can prevent the cover member from interfering with works, including mounting of the sensor to the outer wall of the crankcase and maintenance of the sensor, to be performed from the outside of the crankcase, which facilitates these works.
  • the engine has exhaust pipes provided in an area adjacent to the outer side of the crankcase; wherein the cover member is provided between the exhaust pipes and the sensor.
  • the cover member can therefore avoid the sensor from being subjected to the radiant heat generated by the exhaust pipes more reliably.
  • the cover member is placed so as to cover the sensor from below.
  • the cover member prevents small stones thrown up by the wheels while driving from hitting the sensor, which avoid damage to the sensor.
  • the crankcase including upper and lower cases which are separated approximately relative to the axis of the crankshaft, the lower case having the outer wall comprising a vertical wall extending vertically, upper and lower outward flanges formed integrally with upper and lower edges of the vertical wall, respectively, and ribs formed integrally with an outer surface of the vertical wall and vertically extending; wherein at least any one of the upper and lower outward flanges, and the rib integrally extends outward from the crankcase to form the cover member.
  • the cover member is preferably formed with the upper and lower outward flanges, and the ribs. This means that the sensor can be prevented from being subjected to heat and being damaged by the simply-structured cover member.
  • the upper and lower outward flanges, and the ribs preferably have high strength for their functions. Accordingly, the cover member formed with them can readily have high strength. Therefore, the cover member can more reliably prevent the sensor from being damaged due to external forces.
  • an engine 1 has a crankcase 2, a crankshaft supported with the crankcase 2 to rotate around an axis 3 extending approximately in the horizontal direction, a cylinder 6 supported on a top of the crankcase 2, and a sensor 25, mounted to an outer wall 11 of the crankcase 2, for detecting engine driving conditions.
  • the sensor 25 is mounted to the outer wall 11 of the crankcase 2 below the axis 3 of the crankshaft.
  • a cover member 29 for covering the sensor 25 from the outside is integrally formed to protrude outward from the outer wall 11 of the crankcase 2 in the direction along the outer surface of the crankcase 2.
  • Such an arrangement can prevent a sensor mounted to an outer wall of a crankcase from being subjected to radiant heat generated by a cylinder and exhaust pipes, and to facilitate works including mounting of the sensor to the crankcase and the sensor maintenance.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Exhaust Silencers (AREA)

Claims (4)

  1. Carter de moteur (2) avec un capteur (25) comprenant une structure de montage de capteur pour un moteur à combustion interne (1) ayant un vilebrequin (4) soutenu avec le carter de moteur pour tourner autour d'un axe (3) s'étendant approximativement dans la direction horizontale, un cylindre (6) soutenu sur le haut du carter de moteur, et un capteur, monté sur une paroi extérieure (11) du carter de moteur, pour détecter les conditions de conduite du moteur à combustion interne,
    dans lequel le capteur est monté sur la paroi extérieure du carter de moteur sous l'axe du vilebrequin, et caractérisé en ce qu'un organe de couvercle (29) pour couvrir le capteur de l'extérieur est formé intégralement pour dépasser vers l'extérieur à partir de la paroi extérieure du carter de moteur en direction de la surface extérieure du carter du moteur.
  2. Carter de moteur (2) avec un capteur (25) comprenant une structure de montage de capteur pour un moteur à combustion interne selon la revendication 1, le moteur à combustion interne ayant des tuyaux d'échappement (10) prévus dans une zone adjacente à la face externe du carter de moteur,
    dans lequel l'organe de couvercle est prévu entre les tuyaux d'échappement et le capteur.
  3. Carter de moteur (2) avec un capteur (25) comprenant une structure de montage de capteur pour un moteur à combustion interne selon la revendication 1,
    dans lequel l'organe de couvercle est placé de façon à recouvrir le capteur depuis le dessous.
  4. Carter de moteur (2) avec un capteur (25) comprenant une structure de montage de capteur pour un moteur à combustion interne selon l'une des revendications 1 à 3, le carter de moteur comportant des carters supérieur et inférieur (13, 14) qui sont séparés approximativement selon l'axe du carter de moteur, le carter inférieur ayant la paroi extérieure comprenant un paroi verticale s'étendant essentiellement verticalement, des flasques de vilebrequin supérieure et inférieure vers l'extérieur, respectivement, formés intégralement avec des bords supérieur et inférieur de la paroi verticale respectivement, et des nervures (20) formées intégralement avec la surface extérieure de la paroi verticale et s'étendant essentiellement verticalement,
    dans lequel au moins l'une des flasques supérieure et inférieure vers l'extérieur, et la nervure s'étendent intégralement vers l'extérieur à partir du carter de moteur pour former l'organe de couvercle.
EP04253156A 2003-05-28 2004-05-28 Agencement d'un capteur pour un moteur à combustion interne Expired - Lifetime EP1482149B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2003150312 2003-05-28
JP2003150312A JP2004353508A (ja) 2003-05-28 2003-05-28 エンジンにおけるセンサー取付部構造

Publications (2)

Publication Number Publication Date
EP1482149A1 EP1482149A1 (fr) 2004-12-01
EP1482149B1 true EP1482149B1 (fr) 2007-01-17

Family

ID=32677678

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04253156A Expired - Lifetime EP1482149B1 (fr) 2003-05-28 2004-05-28 Agencement d'un capteur pour un moteur à combustion interne

Country Status (6)

Country Link
EP (1) EP1482149B1 (fr)
JP (1) JP2004353508A (fr)
CN (1) CN100445533C (fr)
DE (1) DE602004004313T2 (fr)
GB (1) GB2402490B (fr)
MY (1) MY136810A (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5107822B2 (ja) * 2008-08-11 2012-12-26 日立建機株式会社 排気ガス浄化装置
JP4715892B2 (ja) * 2008-09-17 2011-07-06 マツダ株式会社 車両用エンジンのセンサ配設構造
JP6132093B2 (ja) * 2013-07-08 2017-05-24 スズキ株式会社 エンジンの排気装置
JP6332396B2 (ja) * 2016-10-14 2018-05-30 マツダ株式会社 ハーネスの取付け構造
CN110520613B (zh) * 2017-03-28 2022-04-12 本田技研工业株式会社 内燃机
BR112019019950A2 (pt) * 2017-03-30 2020-04-28 Honda Motor Co Ltd motor de combustão interna
JP6487959B2 (ja) * 2017-03-30 2019-03-20 本田技研工業株式会社 内燃機関
JP6992435B2 (ja) * 2017-11-22 2022-01-13 スズキ株式会社 クランク角センサの取付構造
JP7310870B2 (ja) * 2017-11-22 2023-07-19 スズキ株式会社 クランク角センサの取付構造
JP6902072B2 (ja) * 2019-07-12 2021-07-14 本田技研工業株式会社 車両用パワーユニット

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Publication number Priority date Publication date Assignee Title
JPH07286537A (ja) * 1994-04-19 1995-10-31 Yasuo Ushio 模型用エンジン

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JPH07286537A (ja) * 1994-04-19 1995-10-31 Yasuo Ushio 模型用エンジン

Also Published As

Publication number Publication date
DE602004004313D1 (de) 2007-03-08
JP2004353508A (ja) 2004-12-16
CN100445533C (zh) 2008-12-24
GB0412046D0 (en) 2004-06-30
CN1573088A (zh) 2005-02-02
GB2402490B (en) 2006-12-20
DE602004004313T2 (de) 2007-10-18
MY136810A (en) 2008-11-28
EP1482149A1 (fr) 2004-12-01
GB2402490A (en) 2004-12-08

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