WO2018029572A1 - Système d'admission destiné à un véhicule à deux roues - Google Patents

Système d'admission destiné à un véhicule à deux roues Download PDF

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Publication number
WO2018029572A1
WO2018029572A1 PCT/IB2017/054683 IB2017054683W WO2018029572A1 WO 2018029572 A1 WO2018029572 A1 WO 2018029572A1 IB 2017054683 W IB2017054683 W IB 2017054683W WO 2018029572 A1 WO2018029572 A1 WO 2018029572A1
Authority
WO
WIPO (PCT)
Prior art keywords
fuel
injection valve
fuel injection
throttle body
wheeled vehicle
Prior art date
Application number
PCT/IB2017/054683
Other languages
English (en)
Inventor
Kothuru NARAYANA HARSHA
Vijaya BHASKAR ADIGA
Damodaran PRAMOTH KUMAR
Maluvadu SUNDARAMAN ANANDKUMAR
Original Assignee
Tvs Motor Company Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tvs Motor Company Limited filed Critical Tvs Motor Company Limited
Publication of WO2018029572A1 publication Critical patent/WO2018029572A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/16—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines characterised by use in vehicles
    • F02M35/162—Motorcycles; All-terrain vehicles, e.g. quads, snowmobiles; Small vehicles, e.g. forklifts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K11/00—Motorcycles, engine-assisted cycles or motor scooters with one or two wheels
    • B62K11/02—Frames
    • B62K11/04—Frames characterised by the engine being between front and rear wheels
    • B62K11/06—Frames characterised by the engine being between front and rear wheels the frame being of single-beam type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M7/00—Motorcycles characterised by position of motor or engine
    • B62M7/02—Motorcycles characterised by position of motor or engine with engine between front and rear wheels
    • B62M7/04—Motorcycles characterised by position of motor or engine with engine between front and rear wheels below the frame
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/02—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning induction conduits
    • F02D2009/0201—Arrangements; Control features; Details thereof
    • F02D2009/0206—Arrangements; Control features; Details thereof specially positioned with relation to engine or engine housing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/02—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning induction conduits

Definitions

  • the present subject matter relates generally to a two wheeled vehicle. More particularly, the present subject matter relates to the two wheeled vehicle having an intake system.
  • An Intake system plays a significant role in an internal combustion (IC) engine and affects driveability, provides increased mileage and to generates desired power and torque.
  • Intake system comprises of pressurised pump, fuel injection valve, ECU, throttle valve, intake manifold, air cleaner and various sensors to provide input to the ECU.
  • Air cleaner is used to supply dirt free air to engine at all operating conditions.
  • the air intake system comprises of air cleaner having a filter element and an intake passage directing air from the air cleaner to the throttle body.
  • fuel injection fuel is introduced in metered quantity directly either inside the IC engine or inside the intake manifold in the form of a fuel spray formed by atomization of the fuel through a small nozzle under high pressure by the fuel injection valve.
  • Intake system having fuel injection has a lot of advantages like cleaner and complete combustion, minimal loss of fuel, better throttle sensitivity and prevent excess amount of fuel entering the IC engine. Overall, this improves IC engine performance and has better cold start characteristics.
  • the location and orientation of fuel injection and throttle body is very important as it provides advantages in terms of accessibility of the throttle body and fuel injection valve and ease of connectivity of various inputs to the throttle body and fuel injection valve. Additionally, the direction of fuel spray from the fuel injection valve to an inlet port of the IC engine is important and the design of fuel spray path affects IC engine performance.
  • Fig. la. illustrates the side view of a two wheeled vehicle employing an embodiment of the present subject matter.
  • Fig. lb. illustrates the top view of the two wheeled vehicle employing the embodiment of the present subject matter.
  • Fig. 2a illustrates the enlarged top view of two wheeled vehicle illustrating the floorboard and side -panel enveloping the throttle body and fuel injection valve underneath according to the embodiment of the present subject matter.
  • FIG. 2b illustrates an intake structure and an air cleaner employing the embodiment of the present subject matter.
  • Fig. 2c illustrates the top view of the throttle body and fuel injection system according to the embodiment of the present subject matter.
  • Fig. 2d illustrates the isometric view of the fuel injection system and intake manifold according to the embodiment of the present subject matter.
  • Fig. 3. illustrates the cut sectional view of the internal combustion engine and the intake structure according to the embodiment of the present subject matter.
  • an internal combustion engine described here operates in four cycles.
  • Such an IC engine is installed in a step through type two wheeled vehicle. It is contemplated that the concepts of the present invention may be applied to other types of vehicles within the spirit and scope of this invention.
  • Further "front” and “rear”, and “left” and “right” referred to in the ensuing description of the illustrated embodiment refer to front and rear, and left and right directions as seen from a rear portion of the IC engine and looking forward.
  • a longitudinal axis refers to a front to rear axis relative to the engine
  • a lateral axis refers generally to a side to side, or left to right axis relative to the engine.
  • An intake system controls this air fuel mixture based on certain parameters determined by various plurality of sensors.
  • the intake system comprises an air cleaner, an intake passage, a throttle body, a fuel injection valve and an intake manifold.
  • the air cleaner draws air from the atmosphere and filters it before supplying air to the downstream components.
  • the intake passage directs the air flow from the atmospheric air filter through a throttle body which comprises a venturi through which the air is throttled and a butterfly valve to control the rate of entry of air based on the throttle control by the rider.
  • the throttled air is directed to an intake port of the IC engine by the intake manifold.
  • the intake port forms the part of a cylinder head of the IC engine which directs air fuel mixture to a combustion chamber.
  • the outlet of the intake port is controlled by an intake valve configured to be operably connected to open and close to match the IC engine four cycles.
  • the fuel injection valve is disposed such that, fuel is sprayed to the throttled air in the intake manifold after throttling.
  • the fuel injection valve introduces fuel in metered quantity directly either inside the IC engine or inside the intake manifold in the form of a fuel spray formed by atomization of the fuel through a small nozzle under high pressure.
  • the fuel injection valve can be mounted on the throttle body or the intake manifold.
  • There are various sensors which determine the IC engine running state and riding conditions and an electronic Control Unit (ECU) adjusts the air fuel mixture based on these inputs.
  • ECU electronic Control Unit
  • There is a fuel pump which is configured to supply pressurized fuel to the fuel injector so that the fuel can be injected easily. The pressure help atomize the fuel at the tip of the fuel injection valve which comes out as a mist of fuel spray.
  • the IC engine running state and riding conditions measured by different sensors are stored in the memory block of the ECU called maps.
  • the ECU is programmed for certain preset modes and fuel delivery quantities when the values are of certain quantity, and the ECU determines how much fuel to deliver based on these quantities.
  • the various sensors are throttle position sensor, idling sensor, crankshaft revolution sensor etc.
  • fuel injection by the fuel injection valve is an effective means to improve IC engine performance and address many critical drawbacks as compared to corresponding carburetor use. Difficulties arise in locating the fuel- injection valve and throttle body.
  • the throttle body and fuel injection valve comprises of assembly of various components and sensors and hence, require frequent access for servicing and troubleshooting. Additionally, the mounting of fuel injection valve is important for good delivery of fuel inside the combustion chamber. In this regard, direction of fuel injection and fuel spray envelope is very important as it directly affects the performance and causes intake port wall wetting and fuel droplets will settle on the side walls of the intake manifold and intake port.
  • a step-through space is provided in a two-wheeled vehicle with a step-through type single tube frame structure called moped.
  • the step-though space has a floorboard extending either side in the lateral direction and may be used for carrying loads or for the rider to rest feet.
  • the frame structure starts from the head pipe, and extends downwards to the step-through space and again rises to form a driver seat, crosses a pillion seat and finishes at the tail lamp.
  • An IC engine is located below the step-through space on the forward side of the vehicle. The engine is functionally connected to a rear wheel of the vehicle such as by a sprocket and chain drive, which provides the forward motion to the vehicle.
  • the frame assembly acts as a skeleton for the vehicle that supports the vehicle loads.
  • a fuel tank can be mounted on the front side of the vehicle at a height above the step-through space, and atleast a portion of the same is ahead of the cylinder head, and can supply fuel to the IC engine through the intake structure.
  • the air cleaner is located below the fuel tank enveloped by the inner cover and supply air to the throttle body through an intake passage.
  • the IC engine is of horizontal type that is, a cylinder axis (the axis on which the piston of the IC engine reciprocates) is almost parallel to the central longitudinal axis of the two wheeled vehicle.
  • the mounting at such a location has drawbacks such as longer air intake passage to the throttle body, difficulty to routing wiring harness around the step-through space and difficulty in connecting the wiring harness connections to the throttle body and fuel injection valve.
  • such vehicles typically have fuel tank located in the rear portion, which requires loner fuel hose routing and larger capacity fuel pump. Even if the fuel tank could be located in the front portion of such vehicle, the step-through space would constrain the fuel hose routing and would have to routed around the step-through space, this requires longer fuel hose routing and additional bends on the routing path which can affect the pressure of fuel supplied to the fuel injection valve.
  • the proposed subject matter discloses mounting and positioning of the fuel injection valve and throttle body so as to allow the easy access of all the components of the throttle body and fuel injection valve. This permits easy tool access from top, on removal of the floorboard to access the fasteners connecting the fuel injection valve to the intake passage. Additionally, on removal of the side panel, easy tool access to access various parts of the throttle body system. On detachment of both the floorboard and the side panel, the entire fuel injection valve and throttle body can be accessed easily for servicing and trouble shooting.
  • a further aspect is to mount the fuel injection valve to squirt fuel to take the shortest path to the IC engine by squirting it directly on the outlet of the intake port.
  • the fuel injection valve and throttle is accommodated in a space below the floorboard and enveloped by the side panel without any changes in the vehicle layout or style components. Furthermore, the fuel injection valve and the throttle body is accommodated in the space adjacent to the single frame structure and above the IC engine cylinder head.
  • a first characteristic of the present subject matter proposes a two wheeled vehicle comprising: a single frame structure, extending from a front portion to a rear portion, said single frame structure comprising a head pipe, a first portion extending rearwardly downward connecting the head pipe at one end, a second portion also called as a step-through space oriented horizontally connecting the other end of the rearwardly downward portion to form a first bend, a third portion extending rearwardly upward connecting the other end of the step-through space to form a second bend; a detachable floorboard assembly covering the step- through portion of the single frame; a fuel tank mounted on the first portion of the single frame structure and capable of accommodating an air cleaner in a space therein behind the fuel tank, said air cleaner configured to draw air from the atmosphere; a internal combustion (IC) engine comprising a piston reciprocating in a cylinder block along a piston axis, a cylinder head comprising at least an intake port, a combustion
  • IC internal combustion
  • the second characteristic of the present subject matter wherein, said throttle body and said fuel injection valve are disposed substantially juxtaposing said first bend of the single frame structure.
  • the third characteristic of the present subject matter wherein, the fuel-injector valve mounted over the intake port such that the fuel-injector valve directing fuel inside the intake port takes the shortest path to reach the combustion chamber.
  • the fuel injection valve is mounted so as to direct fuel vertically to the intake port.
  • the fuel injection valve is disposed fuel is supplied to the fuel-injector valve by means of a nipple fitting, and said nipple fitting is disposed substantially perpendicular to the longitudinal axis facing the front portion to provide easy access of a rubber hose to be inserted on the nipple fitting, and said rubber hose is routed around the substantially horizontal section of the single frame structure.
  • the fuel injection valve and throttle body is disposed adjacent to the main-tube on the right-hand side as viewed from the rear to the front of the two wheeled vehicle.
  • the sixth characteristic of the present subject matter wherein the throttle body has an throttle body axis, said throttle body is mounted such that the throttle body axis is inclined with respect to the longitudinal axis as seen in the top view of the two wheeled vehicle.
  • the fuel injection valve and throttle body are separately attached to the intake port, but the fuel injection valve and throttle body can also form part of a single unit and can be mounted without deviating from the scope of the subject matter.
  • Fig. 1 illustrates a two wheeled vehicle, having the intake structure according to the embodiment of the present subject matter.
  • the IC engine is horizontally disposed, that is, the cylinder block and crankcase lie horizontally with their axis being in a single plane.
  • the IC engine is installed in a moped type motorcycle, and the present invention can be implemented in other two wheeled vehicles employing the similar engine layout.
  • the vehicle (100) has a single frame structure, which acts as the skeleton for bearing the loads.
  • the single frame structure (150) extending from a front portion (F) to a rear portion (R) is a mono-tube type frame structure that includes a head tube (102), a first portion extending rearwardly downward called the main-tube (103), a second portion defining a step-through space (104) (forming part of the main-tube) and a third portion extending rearwardly upward called the rear-tube (105).
  • the main-tube (103) extends rearwardly downward from the head-tube (102) and forms a first bend (CI) along with the step-through space (104) at one end, and said step-through space forms a second bend (C2) with the rear-tube (105).
  • the step-through space (104) is a part of the main-tube (103) that extends rearward, along a longitudinal axis of the vehicle (100), from a rear portion of the main-tube (103).
  • the rear-tube (105) extends inclinedly rearward from a rear portion of the step-through space (104) towards a rear portion R of the vehicle (100).
  • a handle bar assembly (113) is pivotally disposed through the head-tube (102).
  • the handle bar assembly (113) is connected to a front wheel (106) by one or more front suspension(s) (110).
  • a front fonder (108) is disposed above the front wheel (106) for covering at least a portion of the front wheel (106).
  • a fuel tank (112) is mounted to the main- tube (103) of the frame assembly and it is disposed in the front portion F of a step-through structure (104) of the single frame structure.
  • the IC engine (101) is mounted to the step-through space (104) of the main-tube (103).
  • the fuel tank (112) is functionally connected to the IC engine (101).
  • the IC engine is of horizontal type, i.e. parallel to a longitudinal axis of the vehicle (100).
  • a swing arm (121) is swingably connected to the frame assembly.
  • a rear wheel (107) is rotatably supported by the swing arm (121).
  • One or more rear suspension(s) (111) are connecting the swing arm (121) at an angle, to sustain both the radial and axial forces occurring due to wheel reaction, to the frame assembly.
  • a rear fender (109) is disposed above the rear wheel (107).
  • a seat assembly (119a, 119b) is disposed at a rear portion R of the step-through space (104).
  • the seat assembly (119) includes a rider seat (119a), and a pillion seat (119b). Further, the seat assembly (119a, 119b) is positioned above the rear wheel (107).
  • the vehicle (100) is supported by a centre stand (117) mounted to the single frame structure.
  • a floorboard (104a) is detachably mounted to the step-through space (104). The floorboard (104a) covers at least a portion of the IC engine (101). Additionally, side panels (230) are enclosed on the side of the step-through space (104) on either side of the vehicle (100) to cover vehicle components such as an intake structure (120).
  • Fig. la. illustrates the location of mounting of the fuel injection valve (204) and throttle body (201) according to one embodiment.
  • An essential feature of the invention is that, the fuel injection valve (204) and throttle body (201) is disposed adjacent to the step-through space (104) and no portion of the fuel injection valve (204) and throttle body (201) is located below the step-through space (104), except an inlet manifold port flange (203c) which is connected to the IC engine intake port (301).
  • This arrangement ensures that, the throttle body (201) and fuel injection valve (204) are accessible easily, a wiring harness routing (not shown) can be easily routed below the step-through space (104) and a fuel rubber hose (not shown) can be easily routed to access the fuel injection valve (204) with minimal bends thus preventing fuel pressure loss.
  • FIG. 3 illustrates a cut section of the exemplary IC engine showing the main components of the IC engine and representatively illustrates the entry of fuel taking the shortest path according to the embodiment of the present subject matter.
  • the IC engine comprises a reciprocating piston (305) enclosed in the cylinder block (302), a connecting rod (306) connecting the reciprocating piston (305) to a rotatable crankshaft (307).
  • the burning of fuel and oxidizer occurs in the combustion chamber (313) and transfers mechanical energy to the reciprocating piston (305) which transfers the mechanical energy to the rotatable crankshaft (307) which generates power due to the slider crank mechanism.
  • the IC engine (101) further comprises other ancillary systems which include starting system (308), transmission system (not shown), lubrication system (not shown) and exhaust system (not shown) all housed in the crankcase (303).
  • the cylinder head assembly (301) comprises of at least one intake valve (309) and at least one outlet valve (310) which are operated by means of rocker arms (312) and a camshaft (314) which consists of at least one inlet cam lobe (315) and at least one outlet cam lobe (316) which actuates the rocker arms (312) when required.
  • the cylinder head (301) comprises an intake port (301a) and an outlet port (301c) whose one end opens to the combustion chamber (313) and whose opening an closing is controlled by the intake valve (309) and outlet valve (310) respectively.
  • a cam-chain (311) operably connects the rotatable crankshaft (307) and camshaft (314) to drive the camshaft (304) in the cylinder head assembly (301). Atmospheric air from the throttle body (201) and fuel is sprayed through an fuel injection valve (204) enters the intake port (301a) in the cylinder head assembly (301).
  • the cylinder head assembly (301) also comprises an exhaust port whose end facing the combustion chamber is controlled by the exhaust valve and the exhaust port directs the exhaust gases out of the combustion chamber to a muffler (118) is connected to the outer portion of the cylinder head assembly (301).
  • the engine operates in four cycles namely, intake stroke, compression stroke, power, and exhaust stroke. Combustion of air fuel mixture occurs at the end of compression stroke and beginning of power stroke. After combustion, exhaust gases are generated which are expelled out of the cylinder block (302) during the exhaust stroke.
  • Fig. lb. illustrates the top view of the vehicle (100) employing an embodiment of the present subject matter.
  • the fuel injection valve (204) and the throttle body (201) is located on the right-hand side of the step-through space (104) of the main-tube (103) as seen from the vehicle top view.
  • the throttle body (201) and said fuel injection valve (204) are disposed substantially juxtaposing said first bend (CI) of the single frame structure (150).
  • the throttle body (201) has a throttle -body axis (Z) which is oriented angularly with respect to the vehicle central longitudinal axis (Y-Y).
  • the throttle body (201) is located angularly such that, the dimensions of the longer axis of the throttle body (201) can be completely accommodated in the space formed between the upper floorboard (104a), the main-tube having the step-through structure (104) and side panel (230). This angular disposition of the throttle body (201) ensures that, no changes are made either in the floor-board and side panel (230).
  • FIG. 2a illustrates the enlarged top view of the intake system adjacent to the step-through space (104) in the rightward direction according to one embodiment.
  • the intake system comprising the air cleaner (120), the throttle body
  • the intake passage (202) is connected from the outlet of the air cleaner (120) to the intake of the throttle body (201) and the profile of the intake passage (202) is in the shape of a gentle curve towards the step-through space and a central axis of the intake passage lies on a single plane. This profile of the intake passage (202) ensures that stresses are not concentrated on the intake passage
  • a detachable floorboard (104a) is placed over the step-through portion (104) and secured to a pair of brackets (104b).
  • the fuel injection valve is located such that, the fasteners (212a, 212b and 213) are exposed facing the top direction.
  • the fuel injection valve (204) is located adjacent to the step-through space (104).
  • the step-through space (104) will not interfere in tool movement thus alleviating some problems associated with prior art.
  • Fig. 2b illustrates the air cleaner (120) connected to the throttle body (201) through the intake passage (202).
  • the air cleaner (120) is mounted in the front portion of the vehicle (100) on the main-tube.
  • the main- tube (103) has two air cleaner (120) mounting brackets (not shown) on which boss (120b) and pivotable attachment (120c) are mounted using connection members such as fasteners.
  • the profile of the air cleaner (120) is so shaped that, its outer surface provides a base to accommodate the fuel tank (112) over it such that, the fuel tank (112) completely envelopes the air cleaner (120).
  • the air cleaner (120) is accommodated on either one of the lateral sides of the main-tube (103). In the present embodiment, the air cleaner (120) is mounted on the rightward side.
  • Fig. 2c. illustrates a top enlarged view of the throttle body (201) and the fuel injection valve (204) according the embodiment of the present invention.
  • the throttle body (201) comprises a throttle housing (not shown), idle air controlled valve (210), a throttle position sensor (209), and throttle control system (208).
  • the throttle housing comprises a housing having a venturi used for throttling inlet atmospheric air flowing towards the IC engine (101) under pressure.
  • a butterfly valve (213) is disposed downstream of the venture which can be swiveled about an axis. Controlling this swivel, the amount of air flowing towards the intake manifold (203) can be varied.
  • the idle air control valve (210) comprises an electronic actuator and a separate idle air flow circuit which is used to control and maintain idling state of the IC engine (101).
  • the throttle position sensor (in an exemplary embodiment, working on the principle of Hall Effect) is capable of detecting the real-time positions of the throttle state and transmits the signals to a control unit (not shown).
  • the control for varying throttle comprises a throttle pulley (208) configured to rotate on an input given by the rider by an accelerator cable, a throttle shaft (not shown), the butterfly valve (213), and a return spring.
  • the throttle pulley (208) is connected to the throttle shaft which is pivoted on both sides of the inner circumferential surface of the throttle housing.
  • the butterfly valve (213) is integrally attached to the throttle shaft and capable of being swiveled based on the rotation of the throttle pulley (208).
  • a return spring such as a torsion spring is operably attached to the throttle pulley (208) to exert a positive biasing force on the throttle pulley to keep the butterfly valve (213) closed to prevent any inlet of air.
  • the throttle pulley (208) On operation of the accelerator cable (not shown) by the rider, the throttle pulley (208) is configured to rotate against the biasing force of the return spring. On withdrawal of force on the accelerator cable, the potential energy of the return spring rotates the throttle pulley (208) back to closed position.
  • Fig. 2d. illustrates an isometric view of the intake manifold (203), the fuel injection valve (204), the intake port (301a), the fuel-injector cap (207), and the fuel spray path (205) taking the shortest path according the embodiment of the present invention.
  • the intake manifold (203) is a curved pipe made of metal alloy and comprising of flanges on its either end namely, throttle-end flange (203a) and port-end flange.
  • the intake manifold (203) is curved such that, the central axis of either ends of the flange are almost perpendicular to each other.
  • the throttle-end flange (203a) comprises plurality of holes each having internal threading and said throttle-end flange mating with an corresponding flange on the throttle body (201) having corresponding plurality of holes whose axis exactly matches with the plurality of holes on the throttle-end flange (203a).
  • the intake manifold (203) and the throttle body (201) are connected integrally at the junction of the throttle-end flange (203a) and the flange on the throttle body (201) by inserting connecting members such as fasteners in the plurality of holes matched on the corresponding flanges.
  • the intake manifold (203) also comprises an opening (220) suitably located on the intake manifold (203) and said opening (220) so angled that, the opening accommodates the tip of the fuel injection valve (204) such that the fuel spray takes the shortest path to reach the outlet of the intake port (301a).
  • the opening is surrounded by a Fl-flange on which a fuel-injection cap (207) is mounted.
  • the fuel-injection cap (207) supports, locates and mounts the fuel injection valve (204) over the opening (220) such that, the fuel spray takes the shortest path to reach the outlet of the intake port (301a).
  • the opening is located on the corner of the bend of the intake manifold (203) so as to enable the fuel injection valve (204) to be mounted vertically.
  • the opening is surrounded by an opening flange (203b) which matches with an fuel-injection cap flange (207b) on the fuel-injection cap (207) and secured to the opening by means of connecting members such as fasteners.
  • the fuel-injection cap (207) also comprises a nipple fitting (206) on which a rubber hose (not shown) can be inserted.
  • the rubber hose connects the fuel-injection cap (207) to the fuel pump which can draw fuel under pressure to supply it to the fuel injection valve (204).
  • the nipple fitting (207) is configured to receive the pressurized fuel and direct it to the fuel injection valve (204).
  • the fuel-injection cap () also comprises an female electric coupler (207a) electrically connected to the fuel injection valve (204) and which is capable of receiving a male electric coupler (not shown) forming part of the electric coupler system is control the power supply to the fuel injection valve (204) by the controller unit (not shown).
  • the fuel pump (not shown) can be disposed at any convenient location close to the fuel tank (112) to draw and direct fuel under pressure to the fuel injection valve (204).
  • Fig. 3 and Fig. 2d illustrates the fuel spray path (205) taken when the fuel injector is arranged to direct fuel vertically when the inlet of the intake port (301a) is facing upwards in the embodiment of the present subject matter.
  • the IC engine is horizontally disposed with the piston axis almost parallel to the vehicle central longitudinal axis.
  • the inlet of the intake port (301a) in the cylinder head (302) of such an IC engine (101) faces upwards, such that, the intake -port axis (Y) is almost perpendicular to the piston axis (X-X).
  • the intake port (301a) takes a curved path before leading to the combustion chamber of the IC engine through the outlet of the intake port (301a).
  • the outlet of the intake port (301a) provides for a valve seat (not shown) which provides as base for accommodating the head of the intake valve (309).
  • the fuel injection valve (204) is mounted such that, the fuel spray (205) travels the shortest distance to reach the outlet of the intake port (301a).
  • the fuel spray path (205) is directed towards the rear of the head of the intake valve (309). This ensures the fuel spray travels directly to strike in close proximity to the outlet of the intake port (301a) and does not take a path in which the fuel spray comes in contact with the walls of the intake port (301a). This prevents the wall wetting phenomenon of fuel and thus improves efficiency, better fuel consumption and lesser emissions and smooth performance.
  • the fuel injection valve (204) is mounted vertically having a fuel-injection axis (Z) almost perpendicular to the piston axis. This mounting ensures the fuel spray is directed to the shortest path and strikes directly rear of the head of the intake valve (309).

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)

Abstract

La présente invention concerne un véhicule à deux roues (100) comprenant un moteur à combustion interne (CI) surbaissé (101) disposé en dessous d'une seconde partie (104) du véhicule à deux roues (100) comportant un espace que l'on peut enjamber. Un plancher amovible (104a) couvre la partie supérieure de la seconde partie (104). Un filtre à air (120) est disposé vers l'avant du moteur à combustion interne (101) et un conduit d'admission (202) relie le filtre à air (120) et le moteur à combustion interne (101). Un corps d'étranglement (201) est disposé sur le conduit d'admission (202), conçu pour commander le débit d'air aspiré depuis le filtre à air (120). En outre, une soupape d'injection de carburant (204) est configurée pour diriger le carburant à l'intérieur d'un orifice d'admission (301a) du moteur à combustion interne (101) et est disposée en aval du corps d'étranglement (201) sur le conduit d'admission (202). Le corps d'étranglement (201) et ladite soupape d'injection de carburant (204) sont disposés dans un espace formé en dessous du plancher amovible (104a), et situés sensiblement vers le haut sur le côté de ladite deuxième partie (104). Cet agencement fournit une accessibilité aisée et des caractéristiques améliorées de pulvérisation de carburant du véhicule à deux roues (100).
PCT/IB2017/054683 2016-08-08 2017-08-01 Système d'admission destiné à un véhicule à deux roues WO2018029572A1 (fr)

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IN201641026943 2016-08-08
IN201641026943 2016-08-08

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021152609A1 (fr) * 2020-02-01 2021-08-05 Tvs Motor Company Limited Montage de pompe à carburant
US20220163007A1 (en) * 2020-11-25 2022-05-26 Aeon Motor Co., Ltd. Single-inlet air intake control structure

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE659450A (fr) * 1964-02-11 1965-05-28
DE1984475U (de) * 1967-02-08 1968-04-25 Piaggio & C Spa Moped.
US20060037584A1 (en) * 2004-08-23 2006-02-23 Takaaki Imamura Vehicle
ES2275367A1 (es) * 2002-09-26 2007-06-01 Honda Giken Kogyo Kabushiki Kaisha Estructura de soporte de suelo bajo de vehiculo del tipo de suelo bajo.
EP2236339A1 (fr) * 2009-03-31 2010-10-06 Honda Motor Co., Ltd. Véhicule hybride
WO2011118327A1 (fr) * 2010-03-25 2011-09-29 本田技研工業株式会社 Agencement structurel destiné à une batterie pour un véhicule de type à conduite sur selle

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE659450A (fr) * 1964-02-11 1965-05-28
DE1984475U (de) * 1967-02-08 1968-04-25 Piaggio & C Spa Moped.
ES2275367A1 (es) * 2002-09-26 2007-06-01 Honda Giken Kogyo Kabushiki Kaisha Estructura de soporte de suelo bajo de vehiculo del tipo de suelo bajo.
US20060037584A1 (en) * 2004-08-23 2006-02-23 Takaaki Imamura Vehicle
EP2236339A1 (fr) * 2009-03-31 2010-10-06 Honda Motor Co., Ltd. Véhicule hybride
WO2011118327A1 (fr) * 2010-03-25 2011-09-29 本田技研工業株式会社 Agencement structurel destiné à une batterie pour un véhicule de type à conduite sur selle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021152609A1 (fr) * 2020-02-01 2021-08-05 Tvs Motor Company Limited Montage de pompe à carburant
US20220163007A1 (en) * 2020-11-25 2022-05-26 Aeon Motor Co., Ltd. Single-inlet air intake control structure

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