CN102465786A - Structure for attaching exhaust gas sensor - Google Patents
Structure for attaching exhaust gas sensor Download PDFInfo
- Publication number
- CN102465786A CN102465786A CN2011103446646A CN201110344664A CN102465786A CN 102465786 A CN102465786 A CN 102465786A CN 2011103446646 A CN2011103446646 A CN 2011103446646A CN 201110344664 A CN201110344664 A CN 201110344664A CN 102465786 A CN102465786 A CN 102465786A
- Authority
- CN
- China
- Prior art keywords
- abgassensor
- exhaust port
- waste gas
- catchall
- mounting construction
- 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
Links
- 238000002485 combustion reaction Methods 0.000 claims abstract description 25
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 12
- 239000002912 waste gas Substances 0.000 claims description 71
- 238000001514 detection method Methods 0.000 claims description 21
- 238000010276 construction Methods 0.000 claims description 19
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 18
- 239000001301 oxygen Substances 0.000 claims description 18
- 229910052760 oxygen Inorganic materials 0.000 claims description 18
- 239000007789 gas Substances 0.000 claims description 10
- 238000005452 bending Methods 0.000 claims description 8
- 238000006073 displacement reaction Methods 0.000 claims description 6
- 239000000446 fuel Substances 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 238000010304 firing Methods 0.000 description 7
- 239000000725 suspension Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000003321 amplification Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 3
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 230000027455 binding Effects 0.000 description 2
- 238000009739 binding Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000027734 detection of oxygen Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000007784 solid electrolyte Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Images
Classifications
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- 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
- 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
- F01N13/08—Other arrangements or adaptations of exhaust conduits
- F01N13/10—Other arrangements or adaptations of exhaust conduits of exhaust manifolds
-
- 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
- F02B61/00—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing
- F02B61/02—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving cycles
-
- 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
- F02B77/085—Safety, indicating, or supervising devices with sensors measuring combustion processes, e.g. knocking, pressure, ionization, combustion flame
- F02B77/086—Sensor arrangements in the exhaust, e.g. for temperature, misfire, air/fuel ratio, oxygen sensors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1439—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the position of the sensor
-
- 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
-
- 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
- F01N2590/00—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines
- F01N2590/04—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines for motorcycles
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Exhaust Silencers (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Electrical Control Of Ignition Timing (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
An exhaust gas collecting groove 64 extending in a direction of a flow of an exhaust gas is provided to an inner wall of an exhaust port 40 between an outlet port 43 and an exhaust pipe attachment portion 74 in a cylinder head 31 of an internal combustion engine 2, the outlet port 43 being an upstream entrance to the exhaust port 40, the exhaust pipe attachment portion 74 being an exhaust port exit, and the exhaust gas sensor 62 is attached in a way that a front end portion of the exhaust gas sensor 62 is situated in the rear of the exhaust gas collecting groove 64.
Description
Technical field
The present invention relates to the mounting construction of Abgassensor.
Background technique
The Abgassensor (no heater oxygen sensor) of preferred following no heater configuration guarantees in early days that promptly it reacts needed temperature, can be from beginning to detect accurately oxygen in early days.On the other hand, because in the on-stream waste gas that is exposed to high temperature, so, there is the stable on heating problem that improves the testing precision of oxygen simultaneously of guaranteeing Abgassensor.
As one of existing technology example; The example that uses controller unit and actuator to control is as follows arranged, and a part that is about to outlet pipe is divided into two streams, and a stream is discharged stream as heavy in section waste gas master; Another stream is installed stream as the Abgassensor of small bore; Discharge stream the waste gas master flow control valve is set, when the component temperature of Abgassensor does not reach activationary temperature, close above-mentioned flow control valve and make the flow of the waste gas that circulates at Abgassensor installation stream increase and realize the temperature rising of element; Reach the temperature that causes thermal degradation when when above at the component temperature of Abgassensor; Open above-mentioned flow control valve and make the flow minimizing that the waste gas of stream circulation is installed at Abgassensor, the temperature of straining element rises (for example, with reference to patent documentation 1.)。
Patent documentation 1: (Japan) real fair 1-43461 communique
Summary of the invention
The present invention provides a kind of mounting construction of Abgassensor; Do not have in the Abgassensor of heater configuration according to the flow control of above-mentioned waste gas;, internal-combustion engine can carry out high-precision oxygen detection in early days after starting working; And can guarantee the stable on heating while, improve the testing precision of oxygen.
For solving above-mentioned problem; First aspect present invention provides a kind of mounting construction of Abgassensor; It is characterized in that, at the inwall of the exhaust port (40) of the cylinder cap (31) of internal-combustion engine (2), be that relief opening (43) exports with exhaust port at the upstream side inlet of exhaust port (40) be between the outlet pipe assembly department (74); Be provided with along the waste gas catchall (64) of the circulating direction of waste gas, and Abgassensor (62) be installed with the mode that the front end of Abgassensor (62) is positioned at the rear of this waste gas catchall (64).
The mounting construction of the Abgassensor of second aspect present invention on the basis of first aspect; It is characterized in that; The base portion of the element protection cap (71) of said Abgassensor (62) is positioned at Abgassensor mounting hole (63), and the front end of element protection cap (71) is positioned on the gas passageway of exhaust port (40).
The mounting construction of the Abgassensor of third aspect present invention on the basis of second aspect; It is characterized in that; Make the passage shape of said exhaust port (40) see (Fig. 3) in the side of relative cylinder axis (C) direction; From the switching mouth of outlet valve (44) be relief opening (43) to outlet pipe assembly department (74) bending, and it sees (Fig. 4) in cylinder axis (C) direction, also is curved shape at left and right directions; Exhaust port internal face (77) in the inboard of this curved shape is provided with waste gas catchall (64), and Abgassensor (62) is installed.
Fourth aspect present invention first or second aspect in the mounting construction of Abgassensor on the basis aspect arbitrary; It is characterized in that said waste gas catchall (64) spreads all over its front and back with respect near the holding part (79) (promptly, the thin neck (80) of exhaust port) of the valve guiding element (45) that keeps being located at exhaust port (40) and forms.
The mounting construction of the Abgassensor of fifth aspect present invention on the basis of fourth aspect; It is characterized in that said waste gas catchall (64) prolongs imaginary terminal part (75) with the rear that the side prolongation downstream of its wall is constituted and forms with the roughly consistent mode of oxygen concentration detection unit (69) of Abgassensor (62).
The mounting construction of the Abgassensor of sixth aspect present invention on the basis aspect the 5th is characterized in that, said internal-combustion engine (2) will suck air through carrying out ignition timing control and fuel injection amount control and be controlled to be necessarily when starting.
Seventh aspect present invention aspect the 4th～the 5th in the mounting construction of Abgassensor on the basis of arbitrary aspect; It is characterized in that said Abgassensor (62) the path center line (E) of exhaust port (40) relatively is disposed in the groove with the mode of giving prominence to towards upstream side from the downstream side.
The mounting construction of the Abgassensor of eighth aspect present invention on the basis aspect the 7th; It is characterized in that the axis (S) of said Abgassensor (62) forms the displacement of given size (d) and disposes apart from the path center line (E) of exhaust port (40) at the interior side direction of exhaust port (40) curved part.
In the invention of first aspect, with the waste gas Abgassensor (62) that leads, therefore, can activate the Abgassensor (62) of internal-combustion engine (2) start of run in advance through waste gas catchall (64).
In the invention of second aspect,, can reduce the expose amount of oxygen concentration detection unit (69) to the hole inner gateway according to the waste gas conducting effect of said waste gas catchall (64); Simultaneously; Expose in the waste gas of HTHP owing to reduce detection unit (69), so the heat resistance of Abgassensor (62) improves.
In the invention of the third aspect, Abgassensor (62) is located at the side of curved part (Fig. 3) and is located at the exhaust port internal face (77) of the inboard of curved shape (Fig. 4), so reduction is exposed in the waste gas of HTHP, the heat resistance of Abgassensor (62) improves.
In the invention of fourth aspect, even therefore also inflow exhaust gas catchall (64) and be sent to Abgassensor (62) of the waste gas of the comparison low speed that the thin neck (80) of exhaust port (40) brings, can activate Abgassensor (62) in advance.
In the invention of the 5th aspect; The waste gas of circulation is directly run into the oxygen concentration detection unit (69) of Abgassensor (62) in waste gas catchall (64); Prevent circuitous to the downstream side of Abgassensor (62), so, the testing precision of the detection unit of Abgassensor (62) can be improved.
In the invention of the 6th aspect, even do not establish suction air quantity control when starting (IACV: internal-combustion engine idle air control valve) (2), also can shorten the reaction elapsed time.
In the invention of the 7th aspect, waste gas can be carried out well, the detection performance can be improved to the inner inflow of oxygen concentration detection unit (69).
In the invention of eight aspect; The axis (S) of said Abgassensor (62) is formed the displacement of given size (d) and disposes apart from the path center line (E) of exhaust port 40 at the interior side direction of the bending of exhaust port (40), therefore, can prevent that the high outlet side at the high flow rate of waste gas from influencing engine performance; Simultaneously; Effectively catch the exhaust that the interior side direction towards the curved part of low speed flow when starting flows through waste gas catchall (64), so, can activate Abgassensor (62) in advance.
Description of drawings
Fig. 1 is the left surface figure of the two-wheeled vehicle of an embodiment of the present invention;
Fig. 2 is the left surface figure of the power unit of above-mentioned two-wheeled vehicle;
Fig. 3 is the figure that observes near the longitudinal section the cylinder cap of above-mentioned internal-combustion engine from left;
Fig. 4 be among Fig. 3 IV-IV to view;
Fig. 5 is that V among Fig. 4 is to view;
Fig. 6 is the sectional arrangement drawing of Abgassensor;
Fig. 7 is the sectional drawing of VII-VII among Fig. 3;
Fig. 8 is the stereoscopic model of the exhaust port that arrow VIII direction is observed from Fig. 7;
Fig. 9 is the stereoscopic model of the exhaust port that arrow IX direction is observed from Fig. 8;
Figure 10 is near the amplification profile the exhaust port among Fig. 3;
Figure 11 is the sectional drawing of XI-XI among Figure 10.
Symbol description
2: internal-combustion engine; 31: cylinder cap; 40: exhaust port; 43: relief opening; 44: outlet valve; 45: the valve guiding element; 62: Abgassensor; 63: the Abgassensor mounting hole; 64: the waste gas catchall; 69: the oxygen concentration detection unit; 71: the element protection cap; 74: the outlet pipe assembly department; 75: the rear of waste gas catchall 64 prolongs imaginary terminal part; 77: the exhaust port internal face of the inboard of curved shape; 78: the exhaust port internal face in the outside of curved shape; 79: valve guiding element holding part; 80: the thin neck of exhaust port 40; C: cylinder axis; D: the displacement scale of Abgassensor; E: the path center line of exhaust port 40; S: the axis of Abgassensor 62
Embodiment
Fig. 1 is the left surface figure of the two-wheeled vehicle 1 of an embodiment of the present invention.This two-wheeled vehicle 1 possess with internal-combustion engine 2 and power transmitting deice 3 integrated power unit 4.Internal-combustion engine 2 is single-cylinder four-stroke circulation engines.Power unit 4 makes bent axle 5 be equipped on the two-wheeled vehicle 1 towards left and right directions.
In this two-wheeled vehicle 1, on the head pipe 7 of the front end that is positioned at vehicle frame 6, can turn to the ground pivot suspension that the pairing left and right front fork 9 of axle supporting front-wheel 8 is arranged via deflecting bar 10.On the top of deflecting bar 10 operating grip 11 is installed.
From the beginning a body frame 12 of the front portion of formation vehicle frame 6 manages 7 towards the below extension of tilting, and bending is rearward stretched with level then.Dispose the pedal 13 that carries driver's pin at this horizontal part.
The rearward end of body frame 12 is engaged in the left and right directions intermediate portion of the crossbearer 14 of direction extension to the left and right.At crossbearer 14 joints pairing left and right pivot plate 15 is arranged, be loaded on the suspension link rod 16 between this pivot plate 15 and the power unit 4 through Jie, power unit 4 is supported at above-below direction swingably.Engage the front end of left back vehicle frame 17L and right back vehicle frame 17R respectively in the left and right end portions of above-mentioned crossbearer 14.
About after back vehicle frame 17L, 17R extend from crossbearer 14 along oblique upper, crooked and slowly inclination.In addition, in the way of back vehicle frame 17L, 17R, it engaged through 18 mutual bindings of crossbeam about extending along oblique upper.The first half of above-mentioned right back vehicle frame 17R is higher than the first half of left back vehicle frame 17L.About the binding parts 19 of rear end through the level of vehicle-width direction of back vehicle frame 17L, 17R link each other and engage.
About back vehicle frame 17L, 17R above be provided with have the driver with and the seat 20 of the seat surface used of co-rider.About lower front between the back vehicle frame 17L, 17R, seat 20 be provided with receiver 21, be provided with fuel tank 22 in the lower rear of seat 20.Vehicle frame 6 is covered by the vehicle body cover that is formed by synthetic resin 23.
The rear portion of power unit 4 is supported on left back vehicle frame 17L via rear shock absorber 24.Rearward end axle at power transmitting deice 3 is supported with trailing wheel 25.Above front-wheel 8, be provided with front mudguard 26, above trailing wheel 25, be provided with rear mudguard 27.
Fig. 2 is the left surface figure of above-mentioned power unit 4.Power unit 4 is made up of internal-combustion engine 2, power transmitting deice 3.The crankcase 28 of internal-combustion engine 2 links to each other with the front portion of the casing 29 of power transmitting deice 3, and bent axle 5 connects the wall in the middle of both.Internal-combustion engine 2 by the cylinder body 30 that forwards combines successively from crankcase 28, cylinder cap 31, and cylinder head cover 32 form.
Fig. 3 is the figure that observes near the longitudinal section the cylinder cap 31 of above-mentioned internal-combustion engine 2 from left.That is, be the figure that sees with respect to the side of cylinder axis C direction.When explanatory drawing, the direction of arrow Fr among the figure as the place ahead, as the top, is described with the direction of arrow Dn the direction of arrow Up as the below.Among the figure, cylinder cap 31 combines with cylinder body 30 through bolt 36, and cylinder head cover 32 combines with cylinder cap 31 through not shown bolt.The top of cylinder cap 31 be formed with upstream extremity towards above opening and inlet hole 39 from downstream to the bending of firing chamber 38 openings.Be formed with in the bottom of cylinder cap 31 upstream extremity to firing chamber 38 openings and downstream downwards opening bending exhaust port 40.
On cylinder cap 31, the suction valve 42 of the suction port 41 of switching firing chamber 38 is flush-mounted in valve guiding element 45 separately slidably with the outlet valve 44 of the relief opening 43 that opens and closes firing chamber 38.Upstream-end opening at inlet hole 39 is connected with suction tude 46.Upstream extremity in suction tude 46 is connected with throttle body 37 (Fig. 2).In suction tude 46 Fuelinjection nozzle 47 is installed, its front-end face is to inlet hole 39.Downstream at exhaust port 40 connects outlet pipe 48 (Fig. 1).
Carry out driven for opening and closing to suction valve that closes the valve direction application of force 42 and outlet valve 44 through the valve gear 51 in the valve cage 50 that forms by cylinder cap 31 and cylinder head cover 32 through valve spring 49.In valve cage 50, a camshaft 52 via ball bearing pivot suspension rotatably flatly, is formed with intake cam 53 and exhaust cam 54 on this camshaft 52.Inlet rocker axle 55 is set up on the cylinder cap 31 in the front upper place of camshaft 52, and exhaust rocker axle 56 is set up on the cylinder cap 31 in the front lower place of camshaft 52.On this inlet rocker axle 55 and exhaust rocker axle 56, distinguish pivot suspension inlet rocker arm 57 and exhaust rocker arm 58 swingably.An end of above-mentioned rocker arm 57,58 respectively pivot suspension be connected to the roller 59 of cam 53,54; The other end in above-mentioned rocker arm 57,58 is installed butt parts 60 respectively; These butt parts 60 are connected to the top of suction valve 42 and outlet valve 44 respectively, and according to the rotating open-close suction valve 42 and outlet valve 44 of camshaft 52.
Offer the mounting hole 63 of Abgassensor 62 at the internal face near the downstream of exhaust port 40, the front end of Abgassensor 62 exposes in exhaust port 40.Be located at the inwall of exhaust port 40 from the waste gas catchall 64 of the upstream side of exhaust port 40 to above-mentioned mounting hole 63.After state the effect of this groove.
Fig. 4 be among Fig. 3 IV-IV to view.That is be to observe the figure that the cylinder axis C direction of cylinder cap 31 is seen from the rear.In addition, above-mentioned Fig. 3 is the sectional drawing of III-III among Fig. 4.The direction of arrow Up among the figure is the top, and the direction of arrow L is a left, and the direction of arrow R is right-hand.Fig. 4 is the figure that 38 sides are observed cylinder cap 31 from the firing chamber.The face of firing chamber 38 peripheries is the bearing surface 65 of relative cylinder body 30.Among the figure, can see the suction port 41 and relief opening 43 of firing chamber 38.Be connected with inlet hole 39 at suction port 41, be connected with exhaust port 40 at relief opening 43.On cylinder cap 31, Abgassensor 62 is installed with mode in the face of the downstream portion of exhaust port 40.
Among Fig. 3 and Fig. 4, the passage shape of above-mentioned exhaust port 40 is seen (Fig. 3) in the relative side of the cylinder axis C direction of internal-combustion engine 2, from relief opening 43 to 74 bendings of outlet pipe assembly department, and, see (Fig. 4) in cylinder axis C direction, also be the shape of direction bending to the left and right.Among the figure,, between relief opening 43 and outlet pipe assembly department 74, be provided with along the waste gas catchall 64 of the flow direction of waste gas at the inwall of exhaust port 40.The mode that is positioned at the rear of above-mentioned waste gas catchall 64 with the front end of Abgassensor 62 is provided with Abgassensor mounting hole 63 and Abgassensor 62 is installed.Thereby, through waste gas catchall 64 waste gas is imported Abgassensor 62, when internal combustion engine start, can activate Abgassensor 62 in advance.
Fig. 5 be among Fig. 4 V to view.The top of this figure is the bearing surface 65 of relative cylinder body 30, and the bottom is the bearing surface 66 of relative cylinder head cover 32.The installation of outlet pipe is represented by imaginary line with flange 67.Abgassensor 62 is installed towards exhaust port 40.
Fig. 6 is the sectional arrangement drawing of Abgassensor 62.Central part at Abgassensor 62 disposes sensor element 68.This is with zirconia (ZrO
2) for the solid electrolyte of main component has formed the bottom tube shape, adhere to the thin layer of platinum (Pt) in its outside.Inboard to sensor element 68 imports atmosphere, and the outside is exposed to waste gas.The front end of Abgassensor 62 is an oxygen concentration detection unit 69.Front end at Abgassensor 62 is provided with the element protection cap 71 with a plurality of apertures 70, and waste gas is invaded the also periphery of feeler element 68 from this aperture 70 to the inside of Abgassensor 62.Atmosphere imports via filter 73 from atmosphere introducing port 72.Inside and outside difference in oxygen concentration between according to element 68 produces electromotive force, detects oxygen concentration thereby measure this electromotive force.In order to measure the electromotive force of Abgassensor 62, extend from the end of Abgassensor 62 with wire connecting inside and outside the element 61.With the chemically correct fuel is the boundary, can learn the variation of oxygen concentration according to electromotive force drastic change.The state that the precision that the oxygen concentration of Abgassensor 62 detects is the highest, be that the temperature of the element 68 under the state of activation is more than 300 ℃ and below 900.Thereby, particularly when internal combustion engine start, require to improve as soon as possible the temperature of element 68, in addition, element 68 can be for crossing high temperature in requiring to turn round.
Fig. 7 is the sectional drawing of VII-VII among Fig. 3, is the figure that observes near the section the exhaust port 40 and Abgassensor 62 Fig. 4 from the behind of Fig. 4.This is the amplification profile of details of the assembly department of expression Abgassensor 62.Outlet valve 44 omits diagram.Upstream side at exhaust port 40 can be seen relief opening 43.The main flow direction of waste gas flows to along arrow F.The front end of the detection unit 69 of Abgassensor 62 exposes from blast air, and waste gas invades the outside of element 68 (Fig. 6) from a plurality of apertures 70 of being located at element protection cap 71.
Among Fig. 7, the exhaust port internal face 77 in the inboard of curved shape is provided with waste gas catchall 64 and Abgassensor 62.When internal-combustion engine 2 runs up; The waste gas edge of HTHP is from exhaust port internal face 78 high speed circulation in the outside of the curved shape of waste gas catchall 64 or Abgassensor 62 separation; Therefore; When running up, Abgassensor 62 alleviates the waste gas that is exposed to HTHP, and the heat resistance of Abgassensor 62 improves.
Fig. 8 and Fig. 9 are the stereoscopic models of exhaust port 40.Exhaust port 40 is insubstantial space, is the stereogram of model that it is made as physical objects, and Fig. 8 is the expression figure that arrow VIII direction is observed from Fig. 7, and Fig. 9 is the figure that arrow IX direction is observed from Fig. 8.
Among Fig. 8, above-mentioned waste gas catchall 64 is to prolong the wall of groove imaginary terminal part 75 and form with the roughly consistent mode of the oxygen concentration detection unit 69 of Abgassensor 62 in the side rear that prolongs the groove that constitutes downstream.Thereby the stream of the waste gas of circulation is directly run into the detection unit 69 of Abgassensor 62 in waste gas catchall 64, prevents to make a circulation to the downstream side of Abgassensor 62, therefore, can improve the testing precision of Abgassensor 62.
Among Fig. 7, above-mentioned Abgassensor 62 disposes towards exhaust port 40 with the mode of giving prominence to towards upstream side from the downstream side with respect to the path center line E of exhaust port 40.The circulating direction F of waste gas main flow is consistent with the path center line E of exhaust port 40.That is, in Fig. 7, the angle α that the circulating direction F of waste gas main flow and the axis S of Abgassensor 62 form is an acute angle.Thus, the inflow of waste gas can be carried out well, the detection performance can be improved to the inside of the detection unit 69 of Abgassensor 62.
Figure 10 is near the amplification profile the exhaust port 40 among Fig. 3.Figure 11 is the XI-XI sectional drawing among Figure 10.Among Figure 10 and Figure 11 separately the bottom be bearing surface 65 with respect to cylinder body 30.The front end of Abgassensor 62 exposes from exhaust port 40.
Among Figure 10, the front and back that above-mentioned waste gas catchall 64 spreads all over the thin neck 80 (also with reference to Fig. 8) of the exhaust port 40 that valve forms because of guiding element holding part 79 form.Even because because also inflow exhaust gas catchall 64 of the waste gas that thin neck 80 becomes comparison low speed, so, can activate the sensor of initial start stage in advance.
Among Figure 11, the base portion 71a of the element protection cap 71 of above-mentioned Abgassensor 62 is positioned at Abgassensor mounting hole 63, and the front end 71b of element protection cap 71 is positioned on the exhaust passageway of exhaust port 40.This be because; The amount of exposing that effect reduces gas passageway in the exhaust port 40 of detection unit 69 of dredging through above-mentioned waste gas; Minimizing is exposed to the waste gas of HTHP with detection unit 69, thereby can improve the heat resistance of Abgassensor 62 and carry out the detection of oxygen concentration.
Among Figure 10 and Figure 11, the axis S of above-mentioned Abgassensor 62 near the crooked inboard of exhaust port 40, be that the direction of the bearing surface 65 of relative cylinder body 30 forms the displacement of size d and disposes apart from the path center line E of exhaust port 40.During low-speed flow when internal-combustion engine 2 starts, in Figure 10, exhaust flow flows along arrow L towards the interior side direction of curved part.Should flow and caught effectively by waste gas catchall 64, so, can activate in advance in initial start stage.When the height output of internal-combustion engine 2, the flow velocity of waste gas is fast, in Figure 10, prints the H circulation in the outside of curved part along vowing, therefore, Abgassensor 62 can not influence flowing of waste gas.
In this mode of execution, when internal-combustion engine 2 starts,, will suck quantitative air control through carrying out ignition timing control and fuel injection amount control.Particularly; Only carry out when starting in the control that does not suck air etc. under the situation of control of increase of advance angle and fuel injection amount of ignition timing; Make under the situation of the structure that the hot machine of the motor that the engine speed increase causes promotes through heating running can not expecting, all can shorten the reaction elapsed time.
As stated, above-mentioned mode of execution can obtain following effect.
(1) through waste gas catchall 64 with the waste gas Abgassensor 62 that leads, therefore, can activate the Abgassensor 62 of start of run in advance.
(2) only the front end of the element protection cap 71 of Abgassensor 62 is positioned at exhaust port 40, therefore, can satisfy the function of Abgassensor 62, reduces simultaneously to be exposed to HTHP waste gas, improves the heat resistance of Abgassensor 62.
(3) exhaust port 40 sees that in cylinder axis C direction (Fig. 4) is curved shape; Above-mentioned waste gas catchall 64 and Abgassensor 62 are located at exhaust port 40 inwalls of the inboard of curved shape; Therefore, can alleviate in the waste gas of HTHP and expose, improve the heat resistance of Abgassensor 62.
(4) gas that becomes low speed through outlet valve guidance holding part 79 is inflow exhaust gas catchall 64 and be sent to Abgassensor 62 also, therefore, can activate Abgassensor 62 in advance.
(5) rear of the waste gas catchall 64 that constitutes so that the inner wall surface thereof downstream is prolonged of waste gas catchall 64 prolongs imaginary terminal part 75 and forms with the roughly consistent mode of the oxygen concentration detection unit 69 of Abgassensor 62; Therefore; The waste gas of circulation concentrates the detection unit 69 to Abgassensor 62 to flow in waste gas catchall 64, can improve the testing precision of the detection unit 69 of Abgassensor 62.
(6) even do not suck the internal-combustion engine 2 of air quantity control, also can shorten activationary time.
(7) above-mentioned Abgassensor 62 disposes the path center line E of the relative exhaust port 40 of its axis S towards upstream side obliquely, so, can make waste gas well in the inflow exhaust gas sensor 62, improve and detect performance.
(8) the above-mentioned Abgassensor 62 interior side direction side (near the relative direction of the bearing surface 65 of cylinder body 30) of looking curved part in the side of exhaust port forms the displacement of given size d and disposes apart from the path center line E of exhaust port; So; Even during the low-speed flow when internal-combustion engine 2 starts; Waste gas catchall 64 also can be caught exhaust-gas flow effectively, can activate in advance in initial start stage.In addition, when the high height of the flow velocity of waste gas is exported, do not hinder exhaust-gas flow.
Claims (8)
1. the mounting construction of an Abgassensor is characterized in that,
Inwall at the exhaust port (40) of the cylinder cap (31) of internal-combustion engine (2); Upstream side inlet at exhaust port (40) is that relief opening (43) and exhaust port outlet are between the outlet pipe assembly department (74); Be provided with along the waste gas catchall (64) of the circulating direction of waste gas, and Abgassensor (62) be installed with the mode that the front end of Abgassensor (62) is positioned at the rear of this waste gas catchall (64).
2. the mounting construction of Abgassensor as claimed in claim 1 is characterized in that,
The base portion of the element protection cap (71) of said Abgassensor (62) is positioned at Abgassensor mounting hole (63), and the front end of element protection cap (71) is positioned on the gas passageway of exhaust port (40).
3. the mounting construction of Abgassensor as claimed in claim 2 is characterized in that,
Make the passage shape of said exhaust port (40) see (Fig. 3) in the side of relative cylinder axis (C) direction; From the switching mouth of outlet valve (44) is that relief opening (43) is to outlet pipe assembly department (74) bending; And it sees (Fig. 4) in cylinder axis (C) direction; At left and right directions also is curved shape, and the exhaust port internal face (77) in the inboard of this curved shape is provided with waste gas catchall (64), and Abgassensor (62) is installed.
4. like the mounting construction of each described Abgassensor in claim 1 or 2, it is characterized in that,
Said waste gas catchall (64) is to spread all near the thin neck (80) of exhaust port before and after it and form with respect to the holding part (79) of the valve guiding element (45) that keeps being located at exhaust port (40).
5. the mounting construction of Abgassensor as claimed in claim 4 is characterized in that,
Said waste gas catchall (64) prolongs imaginary terminal part (75) with the rear that the side prolongation downstream of its wall is constituted and forms with the roughly consistent mode of oxygen concentration detection unit (69) of Abgassensor (62).
6. the mounting construction of Abgassensor as claimed in claim 5 is characterized in that,
Said internal-combustion engine (2) will suck air through carrying out ignition timing control and fuel injection amount control and be controlled to be necessarily when starting.
7. like the mounting construction of each described Abgassensor in claim 4 or 5, it is characterized in that,
Said Abgassensor (62) the path center line (E) of exhaust port (40) relatively is disposed in the groove with the mode of giving prominence to towards upstream side from the downstream side.
8. the mounting construction of Abgassensor as claimed in claim 7 is characterized in that,
The axis (S) of said Abgassensor (62) forms the displacement of given size (d) and disposes apart from the path center line (E) of exhaust port (40) at the interior side direction of exhaust port (40) curved part.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010251442A JP5554687B2 (en) | 2010-11-10 | 2010-11-10 | Exhaust gas sensor mounting structure |
| JP2010-251442 | 2010-11-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102465786A true CN102465786A (en) | 2012-05-23 |
| CN102465786B CN102465786B (en) | 2014-08-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110344664.6A Active CN102465786B (en) | 2010-11-10 | 2011-11-04 | Structure for attaching exhaust gas sensor |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP2453121B1 (en) |
| JP (1) | JP5554687B2 (en) |
| CN (1) | CN102465786B (en) |
| AU (1) | AU2011239341B2 (en) |
| ES (1) | ES2685078T3 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104847468A (en) * | 2014-02-19 | 2015-08-19 | 浙江福爱电子有限公司 | Engine exhaust device |
| CN107237673A (en) * | 2016-03-29 | 2017-10-10 | 神钢建机株式会社 | Exhaust apparatus |
| CN111828149A (en) * | 2019-04-11 | 2020-10-27 | 本田技研工业株式会社 | Saddle-ride type vehicle |
| CN112351935A (en) * | 2018-08-15 | 2021-02-09 | 本田技研工业株式会社 | Oxygen sensor arrangement structure of motorcycle |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| ES2688899T3 (en) * | 2013-03-25 | 2018-11-07 | Honda Motor Co., Ltd. | Straddle Type Vehicle |
| CN105705749B (en) * | 2013-09-19 | 2018-11-27 | 本田技研工业株式会社 | The fixed structure of exhaust sensor for internal combustion engine |
| JP5952246B2 (en) * | 2013-09-30 | 2016-07-13 | 本田技研工業株式会社 | Exhaust gas sensor protection structure for motorcycles |
| CN103674554B (en) * | 2013-10-25 | 2016-03-02 | 浙江吉利罗佑发动机有限公司 | Automotive engine combustion chamber pick-up unit |
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| JP2011208586A (en) * | 2010-03-30 | 2011-10-20 | Toyota Motor Corp | Exhaust manifold |
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- 2010-11-10 JP JP2010251442A patent/JP5554687B2/en active Active
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- 2011-10-26 AU AU2011239341A patent/AU2011239341B2/en not_active Ceased
- 2011-11-04 CN CN201110344664.6A patent/CN102465786B/en active Active
- 2011-11-07 ES ES11188020.9T patent/ES2685078T3/en active Active
- 2011-11-07 EP EP11188020.9A patent/EP2453121B1/en active Active
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| JP2003074389A (en) * | 2001-09-03 | 2003-03-12 | Honda Motor Co Ltd | Fitting structure of intake air temperature sensor |
| CN101111669A (en) * | 2006-01-13 | 2008-01-23 | 本田技研工业株式会社 | IC engine |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104847468A (en) * | 2014-02-19 | 2015-08-19 | 浙江福爱电子有限公司 | Engine exhaust device |
| CN107237673A (en) * | 2016-03-29 | 2017-10-10 | 神钢建机株式会社 | Exhaust apparatus |
| CN107237673B (en) * | 2016-03-29 | 2021-03-26 | 神钢建机株式会社 | Exhaust device |
| CN112351935A (en) * | 2018-08-15 | 2021-02-09 | 本田技研工业株式会社 | Oxygen sensor arrangement structure of motorcycle |
| CN111828149A (en) * | 2019-04-11 | 2020-10-27 | 本田技研工业株式会社 | Saddle-ride type vehicle |
| CN111828149B (en) * | 2019-04-11 | 2022-05-03 | 本田技研工业株式会社 | Saddle-ride type vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5554687B2 (en) | 2014-07-23 |
| EP2453121A3 (en) | 2015-03-04 |
| EP2453121A2 (en) | 2012-05-16 |
| AU2011239341A1 (en) | 2012-05-24 |
| CN102465786B (en) | 2014-08-20 |
| EP2453121B1 (en) | 2018-05-30 |
| ES2685078T3 (en) | 2018-10-05 |
| JP2012102662A (en) | 2012-05-31 |
| AU2011239341B2 (en) | 2013-03-28 |
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