EP3775515A1 - An engine assembly - Google Patents
An engine assemblyInfo
- Publication number
- EP3775515A1 EP3775515A1 EP19732139.1A EP19732139A EP3775515A1 EP 3775515 A1 EP3775515 A1 EP 3775515A1 EP 19732139 A EP19732139 A EP 19732139A EP 3775515 A1 EP3775515 A1 EP 3775515A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- engine assembly
- cylinder head
- exhaust
- disposed
- exhaust port
- 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
- 230000013011 mating Effects 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 239000007789 gas Substances 0.000 abstract description 36
- 239000000446 fuel Substances 0.000 description 14
- 238000002485 combustion reaction Methods 0.000 description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 9
- 239000001301 oxygen Substances 0.000 description 9
- 229910052760 oxygen Inorganic materials 0.000 description 9
- 239000000203 mixture Substances 0.000 description 8
- 230000003197 catalytic effect Effects 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 6
- 230000003247 decreasing effect Effects 0.000 description 4
- 239000002828 fuel tank Substances 0.000 description 4
- 239000000725 suspension Substances 0.000 description 4
- 239000003054 catalyst Substances 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
-
- 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
Definitions
- the present subject matter relates generally to an engine assembly for a two or three-wheeled vehicle, and more particularly but not exclusively to an exhaust emission system for the engine assembly.
- a vehicle comprises of a frame assembly extending rearwardly from a head tube.
- the frame assembly acts as a skeleton and a structural member for the vehicle that supports the vehicle loads.
- At least one front wheel is connected to a front portion of the frame assembly through one or more front suspension(s).
- the frame assembly extends towards a rear portion of the vehicle.
- At least one rear wheel is connected to a frame assembly through one or more rear suspension(s).
- the frame assembly comprises of an engine assembly coupled to it.
- the engine assembly is functionally connected to the rear wheel, which provides forward motion to the vehicle.
- a muffler assembly is provided at a lateral side of the vehicle mounted to the frame assembly or the vehicle through a mounting bracket.
- the muffler assembly extends in a rearward direction along the length of the vehicle.
- An exhaust port is provided in the engine assembly through which an exhaust pipe extends in a reverse direction forming a part of the muffler assembly.
- FIG. 1 illustrates a left side view of an exemplary two-wheeled vehicle, in accordance with an embodiment of the present subject matter.
- FIG. 2 depicts a left side view of the engine assembly 100, in accordance with the embodiment.
- FIG. 3 illustrates a top view of a cylinder head of the engine assembly.
- Fig. 4 is a sectional view of the cylinder head assembly taken along A-A axis as shown in the Fig. 3.
- Fig. 5 illustrates a sectional view of the cylinder head assembly including at least one detecting member; the section is taken along A-A axis as shown in the Fig. 3.
- Fig. 6 is a sectional view of the cylinder head assembly taken along A-A axis as shown in the Fig. 3.
- Fig. 7 illustrates a top perspective view of the cylinder head assembly.
- Fig. 8 illustrates a top view of a cylinder head cover.
- Fig.9 illustrates the depression configured in the cylinder block of the engine assembly.
- the engine assembly is mounted to the body frame or is swingably connected to the frame assembly.
- the engine assembly is provided with an air supply system and a fuel supply system that supply air-fuel mixture from an air filter and a fuel tank respectively. Combustion of air-fuel mixture takes place in a cylinder portion of the engine assembly.
- the combustion process either in two-stroke or four-stroke engine creates reciprocating motion of a piston disposed therein.
- the reciprocating motion of the piston is converted into rotary motion of the crankshaft thereby generating desired power/torque that gets transmitted to at least one wheel of the vehicle.
- a two-wheeled vehicle is operated through an engine assembly which is horizontally coupled to the rear end of the frame assembly and a fuel tank disposed between the rear portions of the pair of the side tubes.
- Air fuel mixture is supplied to the engine assembly by means of a carburetor. Thereafter combustion of the air fuel mixture takes place so that a piston disposed in the engine assembly is set into motion.
- the piston is operated in a linear motion, after which said liner motion is converted to a rotational motion, wherein said rotational motion is transferred to the rear wheel finally resulting into motion of the vehicle.
- This mechanism also results in generation of power and torque by the engine assembly.
- an exhaust system of a two wheeled vehicle extends in a downward manner from the engine assembly and further extending rearwardly along the length of the vehicle.
- the un -burnt air- fuel mixture in form of exhaust gases is emitted in the atmosphere after a proper oxidation reaction which takes place in the muffler assembly.
- the exhaust gases enter the exhaust system through a main exhaust pipe and later pass through the adapter to the catalytic converter for conversion.
- the air-fuel mixture defines the fuel consumption and performance of the engine.
- a closed loop control is used to control air-fuel mixture thereby providing fuel economy and providing reduced emissions.
- a lambda sensor is mounted to the engine assembly to quantify the oxygen concentration or concentration of other gases depending on which a control system modifies the fuel quantity.
- the lambda sensor is mounted in the exhaust pipe of the engine assembly.
- the exhaust pipe is a connection between the exhaust port and the muffler.
- the lambda sensor placed in the exhaust pipe is considerably away from the exhaust port.
- the temperature of the exhaust gases is the highest at the exhaust port.
- the temperature reduces as the exhaust gases traverse away from the exhaust port through the exhaust pipe.
- the lambda sensor may not provide appropriate results by sensing the available exhaust gases in the exhaust pipe. Therefore, in order to obtain more accurate results from the lambda sensor, it is desirable to dispose the lambda sensor closer to the exhaust port.
- the lambda sensor used to measure the oxygen concentration of exhaust gas in the engine assembly is preferably placed at nearest point where the exhaust temperature is high enough to measure the oxygen concentration in exhaust gasses exiting from the cylinder head exhaust port.
- the cylinder head of the engine assembly is an integral cylinder head type including a cylinder head cover as an integral part and a split cylinder head type including a separate cylinder head cover.
- a split cylinder head type engine numerous dynamic parts including the valves, the valve train parts are to be assembled during multiple assembly operations due to presence of multiple split parts.
- the time taken to assemble the dynamic parts is more and also the split cylinder head type engine has more number of parts.
- the cost of the split cylinder head type engine is also increased due to more number of parts.
- the lambda sensor in both the integral cylinder head type and the split cylinder head type can be disposed outside a fin area in the cylinder head by providing a suitable boss to accommodate the lambda sensor.
- the fins extend till the end of the exhaust port. Therefore, in the split cylinder head type engine assembly, it is challenging and tedious to accommodate the lambda sensor.
- the lambda sensor is accommodated by providing a suitable boss projected beyond the exhaust port.
- a projected boss is not desirable, because, the lambda sensor will also correspondingly project out of the projected boss and away from the exhaust port.
- the at least one detecting member in known art when disposed away from the exhaust port is often subject to high concentration of contamination in the exhaust gases due to more accumulation of the exhaust gases and also until the exhaust gases reaches the at least one detecting member disposed away from the exhaust port. Under such circumstances, the catalytic action performed on the exhaust gases increases and which may result in quicker deterioration of the catalyst, which further, calls for frequent servicing for replacement of the catalytic converter.
- the exhaust gases after passing out of the locus point enter into the exhaust pipe and expand there within, which may lead to inappropriate detecting of the oxygen concentration by the at least one detecting member.
- a two-wheeled vehicle includes an engine assembly comprising a cylinder, a cylinder head attached to the cylinder. Further, a cylinder head cover is disposed upon the cylinder head to cover at least a portion of the cylinder head.
- the cylinder head of the engine assembly includes one or more ports. The one or more ports include at least one input port and at least one exhaust port for intake and exhaust of the air-fuel mixture and the exhaust gases respectively.
- At least one detecting member for detecting the oxygen concentration in the exhaust gases emitted from the exhaust port is disposed in the exhaust port.
- the at least one detecting member will accordingly detect the oxygen concentration in the exhaust gases inside the exhaust port and send the signals to a controller configured to provide input signals for appropriate action of a catalyst.
- the at least one detecting member is, for example, a lambda sensor also called as an oxygen sensor.
- the at least one detecting member is disposed in the exhaust port.
- the exhaust port includes an originating portion, from which the exhaust gases from the combustion chamber originate to traverse through the exhaust port.
- the exhaust port further includes an emerging portion, through which the exhaust gases are emerging outside of the exhaust port to travel into an exhaust pipe connecting between the exhaust port and a muffler.
- the exhaust port includes an exhaust path traversing between the originating portion and the emerging portion, the exhaust path is for traversing of the exhaust gases in the exhaust port.
- the exhaust port is adjoined by an exhaust pipe to pass on the exhaust gases to the muffler.
- the exhaust port and the exhaust pipe together are so designed to form a curved structure including an increasing curve in the exhaust port and a decreasing curve in the exhaust pipe.
- the increasing curve and the decreasing curve form a locus point disposed at a junction between the exhaust port and the exhaust pipe.
- the locus point so formed is sandwiched at the mating surface such that it is between the exhaust port and the exhaust pipe.
- the curved structure is elevated at the locus point.
- the locus point in the exhaust port is where the exhaust gases are accumulated inside the exhaust port having a greater cross-section, wherein abundant exhaust gases are available for the at least one detecting member for sensing the oxygen concentration appropriately.
- the availability of greater surface area at the locus point inside the exhaust port results in accurate functioning of the at least one detecting member, which further results in accurate functionality of the catalytic converter.
- the catalytic converter need not be replaced frequently, which further does not call for frequent servicing of the exhaust system of the engine assembly. Further, therefore, a more reliable functioning of the at least one detecting member is achieved according to the proposed invention. [00028] Therefore, according to an embodiment of the present invention, the at least one detecting member is disposed ahead of the locus point in the curved structure. Such that, abundance of the exhaust gases are readily available for detecting of the oxygen concentration by the at least one detecting member.
- the exhaust path inside the exhaust port is connected with a continuous exhaust path inside the exhaust pipe to let the exhaust gases outside into the atmosphere through the muffler.
- At least a portion of the cylinder head, forming the exhaust path includes a depression configured to receive at least a portion of the at least one detecting member.
- the at least one detecting member includes a detecting portion disposed inside the depression.
- the depression includes a threaded hole configured to receive the detecting portion of the at least one detecting member.
- the cylinder head covered by the cylinder head cover also includes a contour comprising a ‘C’ shape in conformation and in-line with the depression. Such that, the cylinder head portion and the cylinder head cover portion at a proximity to the at least one detecting member do not interfere with the at least one detecting member.
- the threaded hole provides a stable mounting of the at least one detecting member inside the exhaust port in the cylinder head. This ensures that minimum vibrations and other impacts are transferred to the at least one detecting member during the engine assembly operation.
- the exhaust port, and the exhaust pipe forming the curved structure is disposed below a horizontal component passing through the locus point in the exhaust port.
- the curved structure is disposed with respect to the detecting portion such that the horizontal component passing through the locus point and the detecting portion is always a tangent to the curved structure.
- the at least one detecting member is disposed in any of the orientation with respect to the horizontal component. Any of the orientations of the detecting member with respect to the horizontal component includes a vertical direction, a horizontal direction, and at an angle in the range of 0 degrees to 90 degrees.
- Fig. 1 illustrates a left side view of an exemplary two-wheeled vehicle 200, in accordance with an embodiment of the present subject matter.
- Arrows provided in the top right corner of each figure depicts direction with respect to the vehicle, wherein an arrow F denotes front direction, an arrow R indicates rear direction, an arrow Up denotes upward direction, and an arrow Dw denotes downward direction.
- the vehicle 200 includes a frame assembly 201 that extends rearward from a head tube 201 A.
- the frame assembly 201 extends along in a longitudinal direction F-R of the vehicle 200.
- the frame assembly 201 includes a mainframe comprising a main tube 201B extending rearward from a rear portion of the head tube 201 A and a down tube 201C that extends rearwardly downward from the head tube 201A.
- the frame assembly 201 may further comprise a sub-frame formed by a pair of rear tubes that extend obliquely rearward from the main frame.
- An engine assembly 100 is mounted to the main frame of the frame assembly 201.
- the engine assembly 100 acts as the power unit of the vehicle 200, wherein the power unit may also include a traction/electrical motor (not shown).
- the engine assembly 100 is coupled to an exhaust assembly 110 that scavenges exhaust gases there through.
- a front portion of a swing arm 115 is swingably connected to the frame assembly 201 and a rear portion of the swing arm 115 rotatably supports a rear wheel 120.
- the rear wheel 120 is functionally coupled to the engine assembly 100 through a transmission system/member 125.
- the transmission system 125 includes a chain drive coupled to an output of manual gear transmission.
- the transmission system 125 may include an automatic transmission or continuously variable transmission.
- the swing arm 115 is coupled to the frame assembly 201 through one or more rear suspension(s) (not shown).
- a mono-shock rear suspension connects the swing arm 115 to the frame assembly 201.
- a pair of front forks 130 supports a front wheel 135 and is steerably supported by the head tube 201 A.
- a handlebar assembly 140 is connected to an upper portion of the pair of front forks 130.
- a front fender 145 covers at least a portion of the front wheel 135 and the front fender assembly 145 is mounted to the front forks 130.
- a fuel tank 150 is mounted to the main tube 201B of the frame assembly 201 and disposed rearwardly of the handlebar assembly 140.
- a seat assembly including a rider seat 155 and a pillion seat 160 is disposed rearwardly of the fuel tank assembly 150 and is supported by the rear tubes.
- a pair of rider foot pegs 165 is disposed on either sides and is mounted to the frame assembly 201 of the vehicle that supports rider foot.
- a rear fender 170 is disposed upwardly of the rear wheel 120 covering at least a portion of the rear wheel 120.
- the engine assembly 100 is functionally coupled to an air-fuel supply system (not shown) that supplies air and fuel to the engine assembly 100.
- the torque/power output of the engine assembly 100 is transferred to a drive sprocket (not shown).
- a chain drive 125 is coupled to the drive sprocket.
- a sprocket cover encloses the drive sprocket and at least a portion of the chain drive 125.
- the vehicle 200 includes various electrical and electronic systems including a starter motor (not shown), a headlamp 175, a vehicle control unit, and a tail lamp 180.
- the vehicle includes safety systems including a synchronous braking system (not shown), and an anti-lock braking system.
- Fig. 2 depicts a left side view of the engine assembly 100, in accordance with the embodiment.
- the engine assembly 100 includes at least one cylinder head 102 comprising at least one intake valve (not shown) and at least one exhaust valve (not shown).
- the cylinder head 102 is mounted to a cylinder block 101.
- the cylinder block 101 defines a cylinder portion and a piston (not shown) is radially enclosed by the cylinder portion.
- the cylinder head 102 is covered by a cylinder head cover 109 from a top direction.
- the cylinder block 101 is mounted to a crankcase 202.
- the engine assembly 100 is forwardly inclined type. The inclination is of a piston axis defined by reciprocating motion of the piston.
- a vertical or a horizontal engine may be used.
- the cylinder head 102 includes one or more ports.
- the one or more ports include at least one intake port 106 and at least one exhaust port 103.
- the crankcase 202 rotatably supports plurality of engine components including the crankshaft.
- the reciprocating motion of the piston is converted into the rotary motion of the crankshaft.
- the engine assembly 100 includes a clutch assembly (not shown) mounted on one lateral side of the engine assembly and a magneto or an integrated starter generator (not shown) is mounted to another side of the engine assembly 100.
- the clutch assembly is enclosed by a clutch cover (not shown) that is mounted to the crankcase 202.
- the magneto is enclosed by a magneto cover 203 that is mounted to the crankcase 202.
- the clutch cover is disposed on the right hand side RH of the engine assembly and the magneto cover 203 is disposed on the left hand side LH of the engine assembly 100.
- a gear actuation drum (not shown) is coupled to a gear arm that is coupled to a gearshift lever for shifting gears.
- a sensor is mounted to the crankcase body for identifying the gear position. In one embodiment, the sensor is mounted to identify the crankshaft speed.
- Fig. 3 illustrates a top view of a cylinder head of the engine assembly.
- the cylinder head 106 comprises the at least one exhaust port 103. At least a portion of the cylinder head 106 is configured to form the exhaust port 103. The at least a portion of the cylinder head 106 on a top surface l03Ts of the exhaust port 103 is configured to form a depression 301.
- Fig. 4 is a sectional view of the cylinder head assembly taken along A-A axis as shown in the Fig. 3.
- the exhaust port 103 includes an originating portion l03a, from which the exhaust gases originate after undergoing combustion in the combustion chamber in the cylinder block 101. Further, after originating from the originating portion l03a, the exhaust gases traverse through the exhaust path l03ca inside the exhaust port 103.
- the exhaust port 103 ends at an emerging portion l03b, from which the exhaust gases emerge out of the exhaust port 103 and enter the exhaust pipe 104.
- the exhaust pipe 104 includes a continuous exhaust path l03cb there within, through which the exhaust gases are passed on to a muffler (not shown) to let the exhaust gases out into the atmosphere.
- the cylinder head 106 includes a depression 301 extending through the exhaust port 103.
- Fig. 5 illustrates a sectional view of the cylinder head assembly including at least one detecting member, the section is taken along A-A axis as shown in the Fig. 3.
- the exhaust port 103 includes at least one detecting member 105 to detect one or more gaseous components in the exhaust gas traversing along the exhaust path l03ca from the originating portion 103 a to the emerging portion l03b.
- the exhaust port 103 is adjoined by the exhaust pipe 104.
- the exhaust port 103 and the adjoining exhaust pipe 104 include an outer circumferential surface l08a, l08b to form a curved structure.
- the outer circumferential surface l08a, l08b includes an increasing curve l08a, which is an outer circumferential surface of the exhaust port 103, and a decreasing curve l08b, which is an outer circumferential surface of the intake port 106.
- the increasing curve l08a and the decreasing curve l08b includes a locus point 107 sandwiched at the mating interface between the exhaust port 103 and the exhaust pipe 104.
- the increasing curve l08a is elevated at the locus point 107.
- the cross section of the exhaust port 103 is the highest, the exhaust gases accumulated are considerably abundant at this cross-section and the at least one detecting member 105 disposed at the locus point 107 is readily available to detect the exhaust gases.
- the at least one detecting member 105 includes a detecting portion l05a disposed upstream of and at a close proximity to the locus point 107 in the exhaust port 103. Such that, the at least one detecting member 105 can readily detect the one or more required gaseous components from the abundantly available exhaust gases around the locus point 107. This results in an accurate working of the at least one detecting member 105, which further results in efficient usage of the catalytic converter.
- Fig. 6 is a sectional view of the cylinder head assembly taken along A-A axis as shown in the Fig. 3.
- the detecting portion 105 a of the at least one detecting member 105 and the locus point 107 are disposed to be in-line along the exhaust port.
- a horizontal component HZ passing through the detecting portion 105 a and the locus point 107 are disposed with respect to the outer circumferential surface l08a, l08b such that the horizontal component HZ is always a tangent to the outer circumferential surface l08a, l08b.
- the outer circumferential surface l08a, l08b including the at least one detecting portion l05a is always disposed below the horizontal component HZ, such that a top most portion l05Tp of the at least one detecting member 105 is always disposed below an axis PP' passing through the cylinder head cover 109.
- the axis PP' is the highest point in the cylinder head. This ensures that the at least one detecting member 105 does not interfere with other surrounding parts of the engine assembly 100 and other surrounding vehicular parts.
- at least a portion of the at least one detecting member 105 is surrounded by the cylinder head 102, thereby protecting the at least a portion of the at least one detecting member 105.
- the at least one detecting member 105 is disposed at an offset to the axis PP' when viewed from a top view.
- the at least one detecting member 105 includes a central axis l05b passing centrally longitudinally through the at least one detecting member 105, the orientations of the central axis l05b of the at least one detecting member 105 with respect to the horizontal component HZ includes a vertical direction, a horizontal direction, and at an angle in the range of 0 degrees to 90 degrees.
- Fig. 7 illustrates a top perspective view of the cylinder head assembly.
- the at least a portion of the cylinder head 109 includes the depression 301 configured to receive the detecting portion 105 a (not shown) of the at least one detecting member 105.
- the depression 301 includes a shape in conformation and in-line with at least a portion of the at least one detecting member 105.
- the cylinder head cover 109 includes a‘C’ shaped contour 302, which has a shape to be in conformation and in-line to the portion of the at least one detecting member 105 disposed at a proximity to the cylinder head cover 109 as shown in the Fig. 8.
- the depression 301 and the‘C’ shaped contour 302 are configured to protect the at least one detecting member 105 from interfering with the cylinder block 102 and the cylinder head cover 109.
- Fig.9 illustrates the depression configured in the cylinder block of the engine assembly.
- the depression 301 in the exhaust port 103 includes a hole 301H to receive the detecting portion of the at least one detecting member (not shown). Further, the hole 301H includes plurality of serrations 30lth to securely receive the detecting portion of the at least one detecting member.
- the hole 301H is a through hole to allow the at least one detecting member to extend substantially inside the exhaust port 103 and be able to accurately detect the one or more gaseous components in the exhaust gases.
- the depression 301 in the cylinder head is disposed along a plane Y, which is situated lower to another plane X comprising a cylinder head wall 303 which forms the encompassing boundary of the cylinder head in the vicinity of the depression 301.
- the at least one detector (not shown) disposed in the plane Y is always protected by the cylinder head wall 303 that is disposed in a higher plane X. Further, the at least one detector disposed in the plane Y also ensures that the at least one detector member does not project out of the cylinder head 102 and thus, is protected from being hit by the surrounding objects and even during handling of the engine assembly and also during assembling into the vehicle.
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)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IN201841013990 | 2018-04-12 | ||
PCT/IN2019/050301 WO2019198107A1 (en) | 2018-04-12 | 2019-04-12 | An engine assembly |
Publications (3)
Publication Number | Publication Date |
---|---|
EP3775515A1 true EP3775515A1 (en) | 2021-02-17 |
EP3775515C0 EP3775515C0 (en) | 2024-04-10 |
EP3775515B1 EP3775515B1 (en) | 2024-04-10 |
Family
ID=66998462
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19732139.1A Active EP3775515B1 (en) | 2018-04-12 | 2019-04-12 | An engine assembly |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3775515B1 (en) |
BR (1) | BR112020020720A2 (en) |
MX (1) | MX2020010629A (en) |
WO (1) | WO2019198107A1 (en) |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011064193A (en) * | 2009-08-21 | 2011-03-31 | Yamaha Motor Co Ltd | Engine and saddle type vehicle equipped therewith |
WO2015040888A1 (en) * | 2013-09-19 | 2015-03-26 | 本田技研工業株式会社 | Structure for attaching exhaust gas sensor of internal combustion engine |
-
2019
- 2019-04-12 BR BR112020020720-9A patent/BR112020020720A2/en unknown
- 2019-04-12 WO PCT/IN2019/050301 patent/WO2019198107A1/en active Application Filing
- 2019-04-12 EP EP19732139.1A patent/EP3775515B1/en active Active
- 2019-04-12 MX MX2020010629A patent/MX2020010629A/en unknown
Also Published As
Publication number | Publication date |
---|---|
WO2019198107A1 (en) | 2019-10-17 |
EP3775515C0 (en) | 2024-04-10 |
BR112020020720A2 (en) | 2021-01-19 |
MX2020010629A (en) | 2020-10-22 |
EP3775515B1 (en) | 2024-04-10 |
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