EP2599975A2 - Véhicule de type à enfourcher - Google Patents

Véhicule de type à enfourcher Download PDF

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Publication number
EP2599975A2
EP2599975A2 EP12192151.4A EP12192151A EP2599975A2 EP 2599975 A2 EP2599975 A2 EP 2599975A2 EP 12192151 A EP12192151 A EP 12192151A EP 2599975 A2 EP2599975 A2 EP 2599975A2
Authority
EP
European Patent Office
Prior art keywords
oxygen sensor
exhaust path
recess
type vehicle
riding type
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.)
Granted
Application number
EP12192151.4A
Other languages
German (de)
English (en)
Other versions
EP2599975B1 (fr
EP2599975A3 (fr
Inventor
Hironari Suzuki
Masayuki Aoyama
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.)
Yamaha Motor Co Ltd
Original Assignee
Yamaha Motor Co Ltd
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 Yamaha Motor Co Ltd filed Critical Yamaha Motor Co Ltd
Publication of EP2599975A2 publication Critical patent/EP2599975A2/fr
Publication of EP2599975A3 publication Critical patent/EP2599975A3/fr
Application granted granted Critical
Publication of EP2599975B1 publication Critical patent/EP2599975B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/008—Mounting or arrangement of exhaust sensors in or on exhaust apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
    • F01N2560/02—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor
    • F01N2560/025—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting O2, e.g. lambda sensors

Definitions

  • the present invention relates to a structure of an engine for a saddle riding type vehicle.
  • An example of a saddle riding type vehicle is a motorcycle.
  • motorcycles are provided with oxygen sensors.
  • An oxygen sensor is provided in an exhaust path. The oxygen sensor detects oxygen included in exhaust gas.
  • JP-A 2004-316430 discloses a motorcycle including an oxygen sensor.
  • the disclosed motorcycle includes a cylinder head.
  • the cylinder head includes an exhaust port.
  • the oxygen sensor is attached to the exhaust port.
  • a saddle riding type vehicle includes an engine provided with an exhaust path through which exhaust gas is passed and an oxygen sensor attached to the engine and used to detect oxygen included in exhaust gas, the engine has a recess provided at an inner surface of the exhaust path to increase a path sectional area of the exhaust path and an insertion hole opened at an inner surface of the recess and having the oxygen sensor inserted therein, and the oxygen sensor is inserted in the insertion hole as at least a part of a tip end of the oxygen sensor is positioned in the recess.
  • the saddle riding type vehicle according to the invention is capable of improving detection accuracy by the oxygen sensor while reducing ventilation resistance in the exhaust path.
  • Fig. 1 is a left side view of a motorcycle 10 according to the embodiment of the invention. Note that in the following description, the front, rear, left, and right refer to these directions viewed from a rider seated on the seat 28 of the motorcycle 10.
  • the arrow F designates the forward direction of the motorcycle 10
  • the arrow U designates the upward direction of the motorcycle 10.
  • the motorcycle 10 includes a vehicle body frame 12.
  • a head pipe 14 is provided at a front end of the vehicle body frame 12.
  • a steering shaft 16 is inserted in the head pipe 14 in a rotatable manner to the left and right.
  • a handle 18 is attached at an upper end of the steering shaft 16. The steering shaft 16 is rotated by operating the handle 18.
  • a bracket 20 is attached at a lower end of the steering shaft 16. Upper end of a front fork 22 is attached to the bracket 20. The front fork 22 supports a front wheel 24 in a rotatable manner.
  • the vehicle body frame 12 is covered with a vehicle body cover 26.
  • the vehicle body cover 26 is for example made of synthetic resin.
  • the seat 28 is provided above the vehicle body frame 12 on the rear side. There is a storage space under the seat 28.
  • the storage space for example stores a helmet or the like.
  • a power unit 30 is provided under the vehicle body frame 12 on the rear side.
  • the vehicle body frame 12 supports the power unit 30 swingably in the vertical direction.
  • a rear wheel 32 is attached in a rotatable manner at a rear end of the power unit 30. As the motive power of the power unit 30 is transmitted to the rear wheel 32, the rear wheel 32 rotates.
  • Fig. 2 is a left side view of the power unit 30.
  • the arrow F designates the forward direction of the motorcycle 10 and the arrow U designates the upward direction of the motorcycle 10.
  • the power unit 30 includes an engine 34 and a transmission 36.
  • the engine 34 is a 4-stroke single cylinder engine.
  • the engine 34 generates the motive power of the motorcycle 10.
  • the engine 34 may be either an air-cooled engine or a water-cooled engine.
  • the transmission 36 is a continuously variable transmission.
  • the transmission 36 transmits motive power generated by the engine 34 to the rear wheel 32 (see Fig. 1 ).
  • Fig. 3 is a left side view of the engine 34 and an air cleaner 48.
  • Fig. 4 is a right side view of the engine 34 and the air cleaner 48.
  • Fig. 5 is a front view of the engine 34.
  • Fig. 6 is a bottom view of a part of the air cleaner 48 and the engine 34.
  • the air cleaner 48 is positioned in front of the engine 34.
  • Fig. 6 shows a part of the air cleaner 48 positioned in front of the engine 34.
  • Fig. 5 the air cleaner 48 is not shown.
  • the arrow F designates the forward direction of the motorcycle 10 and the arrow U designates the upward direction of the motorcycle 10.
  • the arrow L designates the leftward direction of the motorcycle 10 and the arrow U designates the upward direction of the motorcycle 10.
  • the arrow F designates the forward direction of the motorcycle 10 and the arrow L designates the leftward direction of the motorcycle 10.
  • the engine 34 has a cylinder 38.
  • the cylinder 38 guides a piston to move linearly in a reciprocating manner.
  • the cylinder 38 has an axial line (cylinder axial line L) slightly inclined with respect to the front-rear direction of the vehicle.
  • the cylinder axial line L extends obliquely upward in the forward direction.
  • a front end of the cylinder 38 is positioned above a rear end of the cylinder 38.
  • the cylinder 38 has a cylinder body 40 and a cylinder head 42.
  • the cylinder body 40 is attached at a front end of a transmission case 37 that stores the transmission 36.
  • the piston is provided in the cylinder body 40.
  • the cylinder head 42 has a head main body 44 and a head cover 46.
  • the head main body 44 is attached to a front portion of the cylinder body 40.
  • the head main body 44 forms a combustion chamber together with the piston.
  • the head main body 44 is provided with a cam shaft.
  • the cam shaft drives a valve.
  • the valve carries out air intake/exhaust to/from the combustion chamber.
  • the head cover 46 is attached to a front portion of the head main body 44.
  • the head cover 46 covers the camshaft.
  • An intake system 47 is provided near the cylinder head 42.
  • the intake system 47 produces air-fuel mixture and supplies the mixture to the combustion chamber.
  • the intake system 47 is provided upward from the front of the cylinder head 42.
  • the intake system 47 includes an air cleaner 48, an intake pipe 49, a throttle body 50, a manifold 51, an injector 52 and a sensor 53.
  • the air cleaner 48 stores air cleaner elements.
  • the air cleaner 48 is provided in front of the cylinder head 42.
  • the intake pipe 49 is positioned above the air cleaner 48.
  • the intake pipe 49 has one end connected to the air cleaner 48.
  • the intake pipe 49 has the other end connected to the throttle body 50.
  • the intake pipe 49 guides air passed through the air cleaner elements into the throttle body 50.
  • the throttle body 50 is positioned behind the intake pipe 49.
  • the throttle body 50 has one end connected to the intake pipe 49.
  • the throttle body 50 has the other end connected to the manifold 51.
  • the throttle body 50 stores the throttle valve.
  • the throttle valve adjusts the flow rate of the air.
  • the manifold 51 is positioned behind the throttle body 50.
  • the manifold 51 has one end connected to the throttle body 50.
  • the manifold 51 has the other end connected to the head main body 44.
  • the manifold 51 guides air having its flow rate adjusted by the throttle valve to the head main body 44.
  • the injector 52 is attached to the head main body 44.
  • the injector 52 is for example attached to an intake port provided at the head main body 44.
  • the intake port is connected with the other end of the manifold 51.
  • the injector 52 injects fuel into air passed through the air cleaner elements and having its flow rate adjusted by the throttle valve. In this way, air-fuel mixture is generated.
  • the amount of air-fuel mixture supplied to the combustion chamber changes depending on the opening/closing amount of the throttle valve.
  • a sensor 53 (see Fig. 3 ) is attached to the throttle body 50.
  • the sensor 53 detects a state of the engine 34.
  • the sensor 53 for example outputs a signal used to control the output of the engine 34.
  • the sensor 53 is for example an intake pipe pressure sensor, an intake temperature sensor, and a throttle position sensor.
  • the intake pipe pressure sensor detects intake air pressure.
  • the intake temperature sensor detects intake air temperature.
  • the throttle position sensor detects the opening degree of the throttle valve.
  • the sensor 53 is an integrated sensor capable of functioning as an intake pipe pressure sensor, an intake temperature sensor and a throttle position sensor.
  • a fuel injection amount by the injector 52 is determined based on intake air pressure detected by the sensor 53.
  • an ignition plug 58 is attached at a right side surface of the head main body 44.
  • the ignition plug 58 ignites air-fuel mixture compressed in the combustion chamber. In this way, air-fuel mixture explodes/combusts.
  • an ignition coil 60 is provided at a left side surface of the head cover 46.
  • the ignition coil 60 generates voltage necessary for the ignition plug 58 to ignite air-fuel mixture.
  • the ignition plug 58 and the ignition coil 60 are connected by a plug cord 62.
  • the plug cord 62 passes high voltage current generated by the ignition coil 60 to the ignition plug 58.
  • an exhaust port 64 is provided at a lower surface of the head main body 44.
  • the exhaust port 64 is connected with an exhaust pipe 66.
  • the head main body 44 is provided with an exhaust path 68.
  • Fig. 7 is an enlarged view of the exhaust port 64 of the head main body 44.
  • Fig. 8 is a sectional view taken along line VIII-VIII in Fig. 7 .
  • Fig. 9 is a sectional view taken along IX-IX in Fig. 7 .
  • the exhaust path 68 is connected to the combustion chamber.
  • the exhaust path 68 passes exhaust gas generated in the combustion chamber to the exhaust pipe 66. More specifically, at least a part of the exhaust path 68 is formed at the exhaust port 64.
  • the vertical direction in Fig. 7 (the axial direction of the cylinder 38) is a first direction
  • the path direction of the exhaust path 68 is a second direction
  • the left-right direction in Fig. 7 (the left-right direction of the vehicle) is a third direction.
  • the exhaust path 68 is curved in the third direction. More specifically, as shown in Fig. 9 , the path is curved to one side (right side) in the vehicle widthwise direction.
  • the exhaust port 64 has a recess 70.
  • the recess 70 is provided at an inner circumferential surface of the exhaust path 68.
  • the exhaust path 68 has its path sectional area increased in a position where the recess 70 is formed.
  • the recess 70 is positioned more on one side (right side) in the vehicle widthwise direction than a center C of the exhaust path 68.
  • the center C of the exhaust path 68 is a center of the exhaust path 68 in the first direction and a center of the exhaust path 68 in the third direction. More specifically, the recess 70 is positioned on an inner circumferential side of the exhaust path 68.
  • the width in the exhaust path 68 in the third direction is larger in a position where the recess 70 is formed.
  • the exhaust port 64 is provided with an oxygen sensor 72.
  • the oxygen sensor 72 has a detector 74.
  • the detector 74 is positioned at one end of the oxygen sensor 72 in the axial direction.
  • the detector 74 detects oxygen included in exhaust gas.
  • the oxygen sensor 72 is a heater-less oxygen sensor.
  • the oxygen sensor 72 is attached at the exhaust port 64 more on the side of the head cover 46 than the center C of the exhaust path 68.
  • the exhaust port 64 has an insertion hole 76.
  • the insertion hole 76 is positioned more on the side of the head cover 46 than the center C of the exhaust path 68 and on one side (right side) in the vehicle widthwise direction.
  • the insertion hole 76 extends in the first direction. More specifically, the direction in which the insertion hole 76 extends is the first direction. In other words, the lengthwise direction of the insertion hole 76 is the first direction.
  • a thread groove is provided at an inner circumferential surface of the insertion hole 76.
  • the oxygen sensor 72 has an attachment portion 78.
  • the attachment portion 78 extends in an axial direction of the oxygen sensor 72.
  • a screw thread is formed at an outer circumferential surface of the attachment portion 78.
  • the oxygen sensor 72 is inserted into the insertion hole 76. As shown in Figs. 7 and 8 , the oxygen sensor 72 is inserted into the insertion hole 76 from the outside of the exhaust port 64. More specifically, the oxygen sensor 72 is inserted into the insertion hole 76 from the outside of the exhaust path 68. At the time, the screw thread of the attachment portion 78 engages with the thread groove of the insertion hole 76. As a result, the oxygen sensor 72 is attached to the exhaust port 64. In this state, the axial line of the oxygen sensor 72 extends in the direction (first direction) in which the axial line (cylinder axial line L in Figs. 2 and 3 ) of the cylinder 38 extends.
  • the insertion hole 76 is opened at the inner surface of the recess 70.
  • the tip end (detector 74) of the oxygen sensor 72 is positioned in the recess 70. More specifically, the detector 74 is exposed to the space in the recess 70.
  • the entire tip end (detector 74) of the oxygen sensor 72 does not have to be positioned in the recess 70. At least a part of the tip end (detector 74) of the oxygen sensor 72 needs only be in the recess 70.
  • the width of the recess 70 in the third direction gradually increases from the upstream side of the exhaust path 68 to the downstream side.
  • a space having a greater width on the downstream side than on the upstream side of the exhaust path 68 is formed at least for one of the first and third directions.
  • the tip end of the oxygen sensor 72 is positioned in the recess 70.
  • the ventilation resistance in the exhaust path 68 is reduced.
  • the tip end (detector 74) of the oxygen sensor 72 comes into contact with exhaust gas more easily. This makes it easier to activate the detector 74.
  • the detection accuracy using the oxygen sensor 72 increases.
  • the oxygen sensor 72 is offset in the third direction from the center C of the exhaust path 68. This reduces the projection amount of the oxygen sensor 72 to the side of the head cover 46.
  • the exhaust path 68 is curved in the third direction.
  • the oxygen sensor 72 is provided on the inner circumferential side of the exhaust path 68. In this way, the oxygen sensor 72 can be closer to the combustion chamber.
  • the oxygen sensor 72 is a heater-less oxygen sensor. Therefore, the oxygen sensor 72 has a reduced size.
  • the oxygen sensor 72 is attached to the exhaust port 64. This makes it easier to attach the oxygen sensor 72.
  • the oxygen sensor 72 does not have to be offset from the center C of the exhaust path 68 in the third direction.
  • the oxygen sensor 72 may be positioned immediately above the center C of the exhaust path 68.
  • Fig. 10 is an enlarged view of a port showing another application example of the attachment position for the oxygen sensor.
  • Fig. 11 is a sectional view taken along XI-XI in Fig. 10 .
  • the recess 70 is positioned immediately above the center C of the exhaust path 68 as shown in Fig. 10 .
  • the exhaust path 68 has an expanded width in the first direction at a position where the recess 70 is formed.
  • the oxygen sensor 72 is offset to the inner circumferential side from the center C of the exhaust path 68, but it may be offset to the outer circumferential side. More specifically, the oxygen sensor 72 may be offset to the other side (left side) in the vehicle widthwise direction from the center C of the exhaust path 68. In this case, the recess 70 is positioned more on the other side (left side) in the vehicle widthwise direction than the center C of the exhaust path 68. This reduces the projection amount of the exhaust port 64 from the head main body 44 (the total length of the exhaust port 64).
  • the head main body 44 may be compact and lightweight.
  • the lengthwise direction of the insertion hole 76 is orthogonal to the lengthwise direction of the exhaust path 68 but the lengthwise direction of the insertion hole 76 does not have to be orthogonal to the lengthwise direction of the exhaust path 68.
  • an opening formed at an inner surface of the recess 70 in the insertion hole 76 may be shifted in the lengthwise direction of the exhaust path 68 with respect to an opening formed at the surface of the exhaust port 64.
  • the above-described embodiment relates to the motorcycle but the invention is not limited to the above and may be applied to three- or four-wheel leaning vehicles.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Exhaust Silencers (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Measuring Oxygen Concentration In Cells (AREA)
EP12192151.4A 2011-11-30 2012-11-12 Véhicule de type à enfourcher Active EP2599975B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2011262753A JP2013113279A (ja) 2011-11-30 2011-11-30 鞍乗型車両

Publications (3)

Publication Number Publication Date
EP2599975A2 true EP2599975A2 (fr) 2013-06-05
EP2599975A3 EP2599975A3 (fr) 2013-06-26
EP2599975B1 EP2599975B1 (fr) 2017-03-29

Family

ID=47227532

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12192151.4A Active EP2599975B1 (fr) 2011-11-30 2012-11-12 Véhicule de type à enfourcher

Country Status (7)

Country Link
EP (1) EP2599975B1 (fr)
JP (1) JP2013113279A (fr)
CN (1) CN103133171B (fr)
BR (1) BR102012030477B1 (fr)
ES (1) ES2621882T3 (fr)
MY (1) MY164747A (fr)
TW (1) TWI507602B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3067396A1 (fr) * 2017-06-13 2018-12-14 Renault S.A.S Agencement pour mesure de proprietes de gaz

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103437871B (zh) * 2013-08-20 2016-12-28 江门市大长江集团有限公司 氧传感器安装结构
JP6526997B2 (ja) * 2015-03-26 2019-06-05 本田技研工業株式会社 自動二輪車

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004316430A (ja) 2003-04-10 2004-11-11 Honda Motor Co Ltd 内燃機関におけるシリンダヘッドの排気ガスセンサの取付け構造
EP2295762A1 (fr) 2009-08-21 2011-03-16 Yamaha Hatsudoki Kabushiki Kaisha Moteur et véhicule de type à enfourcher l'incluant

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08177503A (ja) * 1994-12-27 1996-07-09 Yamaha Motor Co Ltd ２サイクルエンジンの排気脈動調整装置
JP3627351B2 (ja) * 1996-02-29 2005-03-09 日産自動車株式会社 エンジンの排気浄化装置
JP3378474B2 (ja) * 1997-08-06 2003-02-17 トヨタ自動車株式会社 内燃機関の排気マニホルド
JP4231718B2 (ja) * 2003-03-26 2009-03-04 ヤンマー株式会社 空燃比センサの取付構造

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004316430A (ja) 2003-04-10 2004-11-11 Honda Motor Co Ltd 内燃機関におけるシリンダヘッドの排気ガスセンサの取付け構造
EP2295762A1 (fr) 2009-08-21 2011-03-16 Yamaha Hatsudoki Kabushiki Kaisha Moteur et véhicule de type à enfourcher l'incluant

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3067396A1 (fr) * 2017-06-13 2018-12-14 Renault S.A.S Agencement pour mesure de proprietes de gaz

Also Published As

Publication number Publication date
ES2621882T3 (es) 2017-07-05
JP2013113279A (ja) 2013-06-10
CN103133171B (zh) 2017-05-24
CN103133171A (zh) 2013-06-05
EP2599975B1 (fr) 2017-03-29
BR102012030477B1 (pt) 2021-03-02
BR102012030477A2 (pt) 2014-03-04
TWI507602B (zh) 2015-11-11
TW201341646A (zh) 2013-10-16
EP2599975A3 (fr) 2013-06-26
MY164747A (en) 2018-01-30

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