CN102465786B - Structure for attaching exhaust gas sensor - Google Patents
Structure for attaching exhaust gas sensor Download PDFInfo
- Publication number
- CN102465786B CN102465786B CN201110344664.6A CN201110344664A CN102465786B CN 102465786 B CN102465786 B CN 102465786B CN 201110344664 A CN201110344664 A CN 201110344664A CN 102465786 B CN102465786 B CN 102465786B
- 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.)
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- 238000002485 combustion reaction Methods 0.000 claims abstract description 27
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 12
- 239000002912 waste gas Substances 0.000 claims description 73
- 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 11
- 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
- 238000005452 bending Methods 0.000 description 8
- 230000004087 circulation Effects 0.000 description 8
- 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
- 238000013459 approach 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
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 230000027734 detection of oxygen Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 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
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 without heater configuration being preferably as follows (without heater oxygen sensor), guarantees that it reacts needed temperature in early days, can be from starting in early days to detect accurately oxygen.On the other hand, because on-stream, be exposed in the waste gas of high temperature, so, there is the stable on heating problem that simultaneously improves the testing precision of oxygen of guaranteeing Abgassensor.
As one of prior art example, there is the example that uses controller unit and actuator to control as follows, a part that is about to outlet pipe is divided into two streams, a stream is as the main discharge stream of heavy in section waste gas, another stream is installed stream as the Abgassensor of small bore, at the main discharge stream of waste gas, flow control valve is set, when the component temperature of Abgassensor does not reach activationary temperature, close that flow that above-mentioned flow control valve makes at Abgassensor the waste gas of stream circulation to be installed increases and the temperature that realizes element rises, at the component temperature of Abgassensor, reach while causing that the deteriorated temperature of heat is above, opening above-mentioned flow control valve reduces the flow that the waste gas of stream circulation is installed at Abgassensor, the temperature of straining element (for example rises, with reference to patent documentation 1.)。
Patent documentation 1:(Japan) real fair 1-43461 communique
Summary of the invention
The invention provides a kind of mounting construction of Abgassensor, according to the flow control of above-mentioned waste gas, do not have in the Abgassensor of heater configuration, after starting working, internal-combustion engine can carry out in early days high-precision oxygen detection, 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, inwall at the exhaust port (40) of the cylinder cap (31) of internal-combustion engine (2), upstream side entrance at exhaust port (40) is that relief opening (43) and exhaust port outlet are between outlet pipe assembly department (74), be provided with along the waste gas catchall (64) of the circulating direction of waste gas, and in the mode that the front end of Abgassensor (62) is positioned at the rear of this waste gas catchall (64), Abgassensor (62) be installed.
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 described 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 described exhaust port (40) see (Fig. 3) in the side of relative cylinder axis (C) direction, from the switching mouth of outlet valve (44), be 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, it is also curved shape, exhaust port internal face (77) in the inner side of this curved shape arranges 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 of either side, it is characterized in that, near the holding part (79) (, the thin neck (80) of exhaust port) that described waste gas catchall (64) is located at the valve guiding element (45) of exhaust port (40) with respect to maintenance spreads all over its front and back and forms.
The mounting construction of the Abgassensor of fifth aspect present invention on the basis of fourth aspect, it is characterized in that, described waste gas catchall (64) with by its wall downstream side extend and oxygen concentration detection unit (69) that the rear that forms extends imaginary terminal part (75) and Abgassensor (62) roughly consistent mode form.
The mounting construction of the Abgassensor of sixth aspect present invention on the basis aspect the 5th, is characterized in that, described internal-combustion engine (2) when starting, by carrying out, control and fuel injection amount is controlled and air amount is controlled as certain by ignition timing.
Seventh aspect present invention aspect the four～five in the mounting construction of Abgassensor on the basis of either side, it is characterized in that, the path center line (E) of the relative exhaust port (40) of described Abgassensor (62) is to be disposed in groove from downstream side towards the outstanding mode of upstream side.
The mounting construction of the Abgassensor of eighth aspect present invention on the basis aspect the 7th, it is characterized in that, at the interior side direction of exhaust port (40) curved part, the path center line (E) apart from exhaust port (40) forms the displacement of given size (d) and configures the axis (S) of described Abgassensor (62).
In the invention of first aspect, by waste gas catchall (64), by the waste gas Abgassensor (62) that leads, therefore, can activate in advance the Abgassensor (62) of internal-combustion engine (2) start of run.
In the invention of second aspect, according to the waste gas conducting effect of described waste gas catchall (64), can reduce oxygen concentration detection unit (69) to the amount of exposing of hole inner gateway, simultaneously, owing to reducing detection unit (69), in the waste gas of High Temperature High Pressure, expose, 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 inner side of curved shape (Fig. 4), so, reduce and be exposed in the waste gas of High Temperature High Pressure, the heat resistance of Abgassensor (62) improves.
In the invention of fourth aspect, even the waste gas of the comparison low speed that the thin neck (80) of exhaust port (40) brings is inflow exhaust gas catchall (64) be sent to Abgassensor (62) also, therefore, can activate in advance Abgassensor (62).
In the invention of the 5th aspect, in waste gas catchall (64), the waste gas of circulation is directly encountered the oxygen concentration detection unit (69) of Abgassensor (62), prevent roundabout to the downstream side of Abgassensor (62), so, can improve the testing precision of the detection unit of Abgassensor (62).
In the invention of the 6th aspect, even the air amount amount control while not establishing startup (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 to the inner inflow of oxygen concentration detection unit (69), detection performance can be improved.
In the invention of eight aspect, by the axis of described Abgassensor (62) (S), at the crooked interior side direction of exhaust port (40), the path center line (E) apart from exhaust port 40 forms the displacement of given size (d) and configures, therefore, can be in the high outlet side combustion motor performance impact preventing at the high flow rate of waste gas, simultaneously, the mobile exhaust of interior side direction of the curved part towards low speed flow while effectively catching startup by waste gas catchall (64), so, can activate in advance Abgassensor (62).
Accompanying drawing explanation
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 observes near the figure in the longitudinal section cylinder cap of above-mentioned internal-combustion engine from left;
Fig. 4 be in Fig. 3 IV-IV to view;
Fig. 5 is that V in Fig. 4 is to view;
Fig. 6 is the sectional arrangement drawing of Abgassensor;
Fig. 7 is the sectional drawing of VII-VII in 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 amplification profile exhaust port in Fig. 3;
Figure 11 is the sectional drawing of XI-XI in Figure 10.
Symbol description
2: internal-combustion engine, 31: cylinder cap, 40: exhaust port, 43: relief opening, 44: outlet valve, 45: valve guiding element, 62: Abgassensor, 63: Abgassensor mounting hole, 64: waste gas catchall, 69: oxygen concentration detection unit, 71: element protection cap, 74: outlet pipe assembly department, 75: the rear of waste gas catchall 64 extends imaginary terminal part, 77: the exhaust port internal face of the inner side 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 by 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 two-wheeled vehicle 1 towards left and right directions.
In this two-wheeled vehicle 1, in the head tube 7 of front end that is positioned at vehicle frame 6 via deflecting bar 10 steerably pivot suspension have the pairing left and right front fork 9 of axle supporting front-wheel 8.On the top of deflecting bar 10, operating grip 11 is installed.
An anterior body frame 12 that forms vehicle frame 6 extends towards the below that tilts from head tube 7, and then bending is rearward stretched with level.At this horizontal part, dispose the pedal 13 of carrying driver pin.
The rearward end of body frame 12 is engaged in the left and right directions intermediate portion of the crossbearer 14 that direction is extended to the left and right.At crossbearer 14, engage and have pairing left and right pivot plate 15, by Jie, be loaded on the suspension link rod 16 between this pivot plate 15 and power unit 4, power unit 4 is supported swingably at above-below direction.In the left and right end portions of above-mentioned crossbearer 14, engage respectively the front end of left back vehicle frame 17L and right back vehicle frame 17R.
Behind left and right, vehicle frame 17L, 17R extend from crossbearer 14 along oblique upper, bending is also slowly tilted.In addition, behind the left and right of extending along oblique upper, in the way of vehicle frame 17L, 17R, it is mutually linked and engages by crossbeam 18.The first half of above-mentioned right back vehicle frame 17R is higher than the first half of left back vehicle frame 17L.Behind left and right, the rear end of vehicle frame 17L, 17R is mutually linked and engages by the connecting member 19 of the level of vehicle-width direction.
Behind left and right vehicle frame 17L, 17R above be provided with have driver with and the seat 20 of the seat surface used of co-rider.Lower front behind left and right between vehicle frame 17L, 17R, seat 20 is provided with receiver 21, in the lower rear of seat 20, is provided with fuel tank 22.The body cover 23 that vehicle frame 6 is formed by synthetic resin covers.
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 consists of internal-combustion engine 2, power transmitting deice 3.The crankcase 28 of internal-combustion engine 2 is connected 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 is formed by the cylinder body 30 from crankcase 28 successively forwards combination, cylinder cap 31 and cylinder head cover 32.
Power transmitting deice 3 consists of V-type variable v-belt drive 33 and gear reducer 34.The aftermost gear shaft of gear reducer 34, as rear axle shaft 35, is mounted with trailing wheel 25 (Fig. 1) one.
Fig. 3 observes near the figure in the longitudinal section cylinder cap 31 of above-mentioned internal-combustion engine 2 from left.That is, be the figure seeing with respect to the side of cylinder axis C direction.When explanatory drawing, using the direction of arrow Fr in figure as the place ahead, using the direction of arrow Up as top, the direction of arrow Dn is described as below.In figure, cylinder cap 31 is by bolt 36 and cylinder body 30 combinations, and cylinder head cover 32 is by not shown bolt and cylinder cap 31 combinations.On the top of cylinder cap 31, be formed with upstream extremity 38 openings to firing chamber towards upper opening and downstream bending inlet hole 39.In the bottom of cylinder cap 31, be formed with upstream extremity to firing chamber 38 openings and downstream downwards opening bending exhaust port 40.
On cylinder cap 31, the suction valve 42 that opens and closes the suction port 41 of firing chamber 38 is flush-mounted in valve guiding element 45 separately slidably with the outlet valve 44 that opens and closes the relief opening 43 of 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).
By valve spring 49, to the suction valve 42 and the outlet valve 44 that close the valve direction application of force, by the valve gear 51 in the valve cage 50 being formed by cylinder cap 31 and cylinder head cover 32, carry out driven for opening and closing.In valve cage 50, a camshaft 52, via ball bearing pivot suspension rotatably flatly, is formed with to intake cam 53 and exhaust cam 54 on this camshaft 52.Inlet rocker axle 55 is set up on cylinder cap 31 in the front upper place of camshaft 52, and exhaust rocker axle 56 is set up on 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.In one end of above-mentioned rocker arm 57,58, pivot suspension is connected to the roller 59 of cam 53,54 respectively, the other end in above-mentioned rocker arm 57,58 is installed respectively butt parts 60, these butt parts 60 are connected to respectively the top of suction valve 42 and outlet valve 44, and according to the rotating open-close suction valve 42 of camshaft 52 and outlet valve 44.
The mounting hole 63 that offers Abgassensor 62 at the internal face that approaches the downstream of exhaust port 40, the front end of Abgassensor 62 exposes in exhaust port 40.From the upstream side of exhaust port 40, to the waste gas catchall 64 of above-mentioned mounting hole 63, be located at the inwall of exhaust port 40.The effect of this groove of aftermentioned.
Fig. 4 be in Fig. 3 IV-IV to view.That is, be the figure seeing from the cylinder axis C direction of rear observation cylinder cap 31.In addition, above-mentioned Fig. 3 is the sectional drawing of III-III in Fig. 4.The direction of arrow Up in figure is top, and the direction of arrow L is left, and the direction of arrow R is right-hand.Fig. 4 is the figure that 38 sides are observed cylinder cap 31 from firing chamber.The face of firing chamber 38 peripheries is the bearing surface 65 of relative cylinder body 30.In figure, can see suction port 41 and the relief opening 43 of firing chamber 38.At suction port 41, be connected with inlet hole 39, at relief opening 43, be connected with exhaust port 40.Mode with the downstream portion in the face of exhaust port 40 on cylinder cap 31 is provided with Abgassensor 62.
In Fig. 3 and Fig. 4, the passage shape of above-mentioned exhaust port 40 is seen (Fig. 3) in the side of the cylinder axis C of phase combustion motor 2 direction, from relief opening 43 to 74 bendings of outlet pipe assembly department, and, in cylinder axis C direction, seeing (Fig. 4), is also the shape of direction bending to the left and right.In figure, at the inwall of exhaust port 40, 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.The mode that is positioned at the rear of above-mentioned waste gas catchall 64 with the front end of Abgassensor 62 arranges Abgassensor mounting hole 63 and Abgassensor 62 is installed.Thereby, by waste gas catchall 64, waste gas is imported to Abgassensor 62, when internal combustion engine start, can activate in advance Abgassensor 62.
Fig. 5 be in Fig. 4 V to view.The top of this figure is the bearing surface 65 of relative cylinder body 30, and 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 by with zirconia (ZrO
2) for the solid electrolyte of main component has formed bottom tube shape, in its outside, adhere to the thin layer of platinum (Pt).Inner side to sensor element 68 imports atmosphere, and outside is exposed to waste gas.The front end of Abgassensor 62 is 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 the also periphery of feeler element 68 is invaded in the inside of waste gas from this aperture 70 to Abgassensor 62.Atmosphere imports via filter 73 from atmosphere introducing port 72.According to the inside and outside difference in oxygen concentration of element 68, produce electromotive force, thereby measure this electromotive force, detect oxygen concentration.In order to measure the electromotive force of Abgassensor 62, extend from the end of Abgassensor 62 with the electric wire 61 being connected inside and outside element.Take chemically correct fuel as boundary, according to electromotive force drastic change, can learn the variation of oxygen concentration.The state that precision that the oxygen concentration of Abgassensor 62 detects is the highest, be the temperature of the element 68 under state of activation be 300 ℃ above and 900 below.Thereby, particularly, when internal combustion engine start, require to improve as quickly as possible the temperature of element 68, in addition, in requiring to turn round, element 68 can be for crossing high temperature.
Fig. 7 is the sectional drawing of VII-VII in Fig. 3, is from the behind of Fig. 4, to observe near the figure of section exhaust port 40 and Abgassensor 62 Fig. 4.This means the amplification profile of details of the assembly department of Abgassensor 62.Outlet valve 44 omits diagram.Upstream side at exhaust port 40 can be seen relief opening 43.The Main Current of waste gas is to flowing to along arrow F.The front end of the detection unit 69 of Abgassensor 62 exposes from exhaust stream, and waste gas invades the outside of element 68 (Fig. 6) from being located at a plurality of apertures 70 of element protection cap 71.
In Fig. 7, the exhaust port internal face 77 in the inner side of curved shape is provided with waste gas catchall 64 and Abgassensor 62.When internal-combustion engine 2 runs up, the waste gas of High Temperature High Pressure is along exhaust port internal face 78 high speed circulation in the outside of the curved shape from waste gas catchall 64 or Abgassensor 62 separation, therefore, when running up, Abgassensor 62 alleviates the waste gas that is exposed to High Temperature High Pressure, 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 means the 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.
In Fig. 8, above-mentioned waste gas catchall 64 with the oxygen concentration detection unit 69 that the rear of the wall of the groove groove that side extend to form downstream extended to imaginary terminal part 75 and Abgassensor 62 roughly consistent mode form.Thereby, at the stream of the waste gas of waste gas catchall 64 interior circulations, directly encounter the detection unit 69 of Abgassensor 62, prevent to the downstream side of Abgassensor 62 roundaboutly, therefore, can improve the testing precision of Abgassensor 62.
In Fig. 7, above-mentioned Abgassensor 62 with respect to the path center line E of exhaust port 40 with from downstream side towards the outstanding mode of upstream side towards exhaust port 40 configurations.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 acute angle.Thus, waste gas can be carried out well to the inflow of the inside of the detection unit 69 of Abgassensor 62, detection performance can be improved.
Figure 10 is near amplification profile exhaust port 40 in Fig. 3.Figure 11 is the XI-XI sectional drawing in Figure 10.In Figure 10 and Figure 11, bottom is the bearing surface 65 with respect to cylinder body 30 separately.The front end of Abgassensor 62 exposes from exhaust port 40.
In 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 due to the waste gas that becomes comparison low speed due to thin neck 80 also inflow exhaust gas catchall 64, so, can activate in advance the sensor of initial start stage.
In 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 effect of dredging by above-mentioned waste gas reduces to the amount of exposing of the exhaust port 40 interior gas passageways of detection unit 69, minimizing is exposed to detection unit 69 waste gas of High Temperature High Pressure, thereby can improve the heat resistance of Abgassensor 62 and carry out the detection of oxygen concentration.
In Figure 10 and Figure 11, the axis S of above-mentioned Abgassensor 62 in the inner side that approaches exhaust port 40 bendings, be that the direction of the bearing surface 65 of relative cylinder body 30 forms the displacement of size d and configures apart from the path center line E of exhaust port 40.During low-speed flow when internal-combustion engine 2 starts, in Figure 10, waste gas streams flows along arrow L towards the interior side direction of curved part.This flows and is effectively caught 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, in the outside of curved part, along vowing, prints H circulation, and therefore, Abgassensor 62 can not affect flowing of waste gas.
In present embodiment, when internal-combustion engine 2 starts, by carrying out, ignition timing is controlled and fuel injection amount is controlled, and air amount is quantitatively controlled.Particularly, do not carry out air amount control etc. and in the situation that only carry out the control of the advance angle of ignition timing and the increase of fuel injection amount while starting, in the situation that the structure that can not expect to make by heating running the heat engine of the motor that engine speed increase causes to promote all can shorten the reaction elapsed time.
As mentioned above, above-mentioned mode of execution can obtain following effect.
(1) by waste gas catchall 64 by the waste gas Abgassensor 62 that leads, therefore, can activate in advance the Abgassensor 62 of start of run.
(2) only the front end of the element protection cap 71 of Abgassensor 62 is positioned at exhaust port 40, therefore, can meet the function of Abgassensor 62, reduces and is exposed to High Temperature High Pressure waste gas simultaneously, improves the heat resistance of Abgassensor 62.
(3) exhaust port 40 sees that in cylinder axis C direction (Fig. 4) is for curved shape, above-mentioned waste gas catchall 64 and Abgassensor 62 are located at exhaust port 40 inwalls of the inner side of curved shape, therefore, can alleviate in the waste gas of High Temperature High Pressure and expose, improve the heat resistance of Abgassensor 62.
(4) gas that becomes low speed by outlet valve guidance holding part 79 is inflow exhaust gas catchall 64 be sent to Abgassensor 62 also, therefore, can activate in advance Abgassensor 62.
(5) the oxygen concentration detection unit 69 that the rear of the waste gas catchall 64 that waste gas catchall 64 forms so that inner wall surface thereof downstream is extended extends imaginary terminal part 75 and Abgassensor 62 roughly consistent mode forms, therefore, detection unit 69 to Abgassensor 62 in the exhaust gas centralized of waste gas catchall 64 interior circulations flows into, and can improve the testing precision of the detection unit 69 of Abgassensor 62.
(6) even do not carry out the internal-combustion engine 2 of air amount amount control, also can shorten activationary time.
(7) above-mentioned Abgassensor 62 configures the path center line E of the relative exhaust port 40 of its axis S obliquely towards upstream side, so, can make waste gas well in inflow exhaust gas sensor 62, improve and detect performance.
(8) in the side of exhaust port, depending on the interior side direction side (approaching the direction of the bearing surface 65 of relative cylinder body 30) of curved part, the path center line E apart from exhaust port forms the displacement of given size d and configures above-mentioned Abgassensor 62, so, even during the low-speed flow when internal-combustion engine 2 starts, waste gas catchall 64 also can catch 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. a mounting construction for Abgassensor, offers the mounting hole (63) of Abgassensor (62) at the inwall of the exhaust port (40) of the cylinder cap (31) of internal-combustion engine (2), it is characterized in that,
Upstream side entrance at described exhaust port (40) is that relief opening (43) and exhaust port outlet are between outlet pipe assembly department (74), be provided with along the waste gas catchall (64) of the circulating direction of waste gas, and the mode at rear that is positioned at the waste gas circulating direction of this waste gas catchall (64) with the front end of described Abgassensor (62) is installed described Abgassensor (62)
Cylinder axis (C) direction from internal-combustion engine (2), the passage shape of described exhaust port (40) is curved shape, and, path center line (E) with respect to described exhaust port (40), at the inwall of described exhaust port (40) of inner side of opposition side that is positioned at the expansion side of described curved shape, waste gas catchall (64) is set, and Abgassensor (62) is installed.
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 described 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,
The passage shape of described exhaust port (40) is from the side of relative cylinder axis (C) direction, for the switching mouth from outlet valve (44) is that relief opening (43) is to the crooked curved shape of outlet pipe assembly department (74).
4. the mounting construction of the Abgassensor as described in any one in claim 1 or 2, is characterized in that,
Described waste gas catchall (64) spreads all near the thin neck (80) of holding part (79) of valve guiding element (45) of exhaust port (40) before and after it and forms with respect to keeping being located at.
5. the mounting construction of Abgassensor as claimed in claim 4, is characterized in that,
Described waste gas catchall (64) with by its wall downstream side extend and oxygen concentration detection unit (69) that the rear that forms extends imaginary terminal part (75) and Abgassensor (62) roughly consistent mode form.
6. the mounting construction of Abgassensor as claimed in claim 5, is characterized in that,
Described internal-combustion engine (2) when starting, by carrying out, control and fuel injection amount is controlled and air amount is controlled as certain by ignition timing.
7. the mounting construction of Abgassensor as claimed in claim 4, is characterized in that,
Described Abgassensor (62) relatively exhaust port (40) path center line (E) with from downstream side in the outstanding mode of upstream side is disposed at described waste gas catchall (64).
8. the mounting construction of Abgassensor as claimed in claim 1, is characterized in that,
The axis (S) of described Abgassensor (62) is from this axis (S) direction, apart from the path center line (E) of exhaust port (40), forms the displacement of given size (d) and configures.
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 CN102465786A (en) | 2012-05-23 |
| CN102465786B true 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) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2987972B1 (en) * | 2013-03-25 | 2018-09-19 | Honda Motor Co., Ltd. | Saddle type vehicle |
| ES2680592T3 (en) | 2013-09-19 | 2018-09-10 | Honda Motor Co., Ltd. | Structure for joining an exhaust gas sensor of an 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 |
| CN104847468A (en) * | 2014-02-19 | 2015-08-19 | 浙江福爱电子有限公司 | Engine exhaust device |
| JP6399024B2 (en) * | 2016-03-29 | 2018-10-03 | コベルコ建機株式会社 | Vehicle exhaust system |
| DE112018007907T5 (en) * | 2018-08-15 | 2021-04-29 | Honda Motor Co., Ltd. | ARRANGEMENT STRUCTURE OF AN O2 SENSOR FOR A TWO-WHEELED MOTORCYCLE |
| JP6816199B2 (en) * | 2019-04-11 | 2021-01-20 | 本田技研工業株式会社 | Saddle-type vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101111669A (en) * | 2006-01-13 | 2008-01-23 | 本田技研工业株式会社 | IC engine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS58162226U (en) * | 1982-04-26 | 1983-10-28 | トヨタ自動車株式会社 | Exhaust purification device |
| JPS60159823U (en) * | 1984-04-02 | 1985-10-24 | 株式会社日本自動車部品総合研究所 | exhaust manifold |
| JPS6162221U (en) * | 1984-09-28 | 1986-04-26 | ||
| JPH0798612B2 (en) | 1987-08-06 | 1995-10-25 | 大日本印刷株式会社 | Printing signature forming device |
| US4831820A (en) * | 1987-12-11 | 1989-05-23 | Outboard Marine Corporation | Engine with exhaust gas sensing |
| JPH08177471A (en) * | 1994-12-28 | 1996-07-09 | Yamaha Motor Co Ltd | Two-cycle engine |
| JPH11200913A (en) * | 1998-01-13 | 1999-07-27 | Honda Motor Co Ltd | Arrangement structure for exhaust gas sensor of internal combustion engine |
| JP2002070609A (en) * | 2000-08-25 | 2002-03-08 | Honda Motor Co Ltd | Multicylinder engine |
| JP4109848B2 (en) * | 2001-09-03 | 2008-07-02 | 本田技研工業株式会社 | Intake duct with intake temperature sensor |
| JP4815477B2 (en) * | 2008-06-30 | 2011-11-16 | 本田技研工業株式会社 | Mounting structure of motorcycle exhaust gas sensor |
| JP2011208586A (en) * | 2010-03-30 | 2011-10-20 | Toyota Motor Corp | Exhaust manifold |
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2010
- 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
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101111669A (en) * | 2006-01-13 | 2008-01-23 | 本田技研工业株式会社 | IC engine |
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| Title |
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| JP特开2003-74389A 2003.03.12 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2453121B1 (en) | 2018-05-30 |
| AU2011239341B2 (en) | 2013-03-28 |
| JP2012102662A (en) | 2012-05-31 |
| EP2453121A3 (en) | 2015-03-04 |
| EP2453121A2 (en) | 2012-05-16 |
| AU2011239341A1 (en) | 2012-05-24 |
| CN102465786A (en) | 2012-05-23 |
| JP5554687B2 (en) | 2014-07-23 |
| ES2685078T3 (en) | 2018-10-05 |
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