WO2018158698A1 - Système d'induction d'air destiné à un véhicule à deux roues - Google Patents

Système d'induction d'air destiné à un véhicule à deux roues Download PDF

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Publication number
WO2018158698A1
WO2018158698A1 PCT/IB2018/051270 IB2018051270W WO2018158698A1 WO 2018158698 A1 WO2018158698 A1 WO 2018158698A1 IB 2018051270 W IB2018051270 W IB 2018051270W WO 2018158698 A1 WO2018158698 A1 WO 2018158698A1
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WO
WIPO (PCT)
Prior art keywords
fuel
intake
intake pipe
port
engine
Prior art date
Application number
PCT/IB2018/051270
Other languages
English (en)
Inventor
Muthuraja ANNAMALAI
Vigneshwara RAJA KESAVAN
Kotha VENKATA NAGA SUDHAKAR
Subramoniam CHIDAMBARAM
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
Priority to CN201880024263.2A priority Critical patent/CN110494643B/zh
Priority to BR112019018086-9A priority patent/BR112019018086A2/pt
Publication of WO2018158698A1 publication Critical patent/WO2018158698A1/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
    • F02M35/10—Air intakes; Induction systems
    • F02M35/104—Intake manifolds
    • F02M35/108—Intake manifolds with primary and secondary intake passages
    • F02M35/1085—Intake manifolds with primary and secondary intake passages the combustion chamber having multiple intake valves
    • 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
    • F02B31/00—Modifying induction systems for imparting a rotation to the charge in the cylinder
    • F02B2031/006—Modifying induction systems for imparting a rotation to the charge in the cylinder having multiple air intake valves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the present subject matter relates generally to a two or three wheeled saddle type vehicle. More particularly, the present subject matter relates to an intake pipe of an air induction system for the two wheeled vehicle.
  • An Intake system plays a significant role in an internal combustion (IC) and affects driveability, provides increased mileage and to generates desired and torque.
  • Induction system comprises of pressurised fuel pump, fuel injection valve, ECU, throttle valve, intake pipe, air cleaner and various sensors to provide input to the ECU.
  • the fuel injection valve introduces fuel in metered quantity directly either inside the IC engine or inside the intake pipe in the form of a fuel spray formed by atomization of the fuel through a small nozzle under high 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 valve is very important as it provides advantages in terms of improved combustion, accessibility of the fuel injection valve and ease of connectivity of various inputs to the fuel injection valve.
  • the IC engine comprises a cylinder head having inlet ports.
  • the mounting and placement of the fuel injection valve is a challenge.
  • mounting of the fuel injection valve in an air induction system setup is challenging due to presence of two intake ports and loss of fuel during fuel spray by fuel injection valve into the two intake ports.
  • the two wheeled vehicles having the cylinder head with two inlet ports has the attractive feature of increased mileage and fuel efficiency improved IC engine performance and is of great importance.
  • An internal combustion engine comprises of a cylinder head.
  • the cylinder head comprises of two intake valves namely swirl intake valve and tumble intake valve operating within a swirl port and a tumble port. Atmospheric air from a throttle body and fuel sprayed through a fuel injection valve enters the swirl port and the tumble port respectively.
  • a short circuiting part forming a mixing region facilitates the position of the fuel injection valve, wherein the fuel spray is squirted into the mixing region towards the swirl port and tumble port.
  • the intake pipe is provided with an injector region having a mounting flange and an opening to allow access of the fuel injector valve.
  • FIG. 1 illustrates the left side view of a two wheeled vehicle employing an embodiment of the present subject matter.
  • FIG. 2. illustrates an enlarged & right side view of an internal combustion engine with an air induction system according to one embodiment of the present subject matter.
  • FIG. 3. illustrates the cut sectional view of the internal combustion engine and the intake pipe according to an embodiment of the present subject matter.
  • FIG. 4. illustrates the exploded view of the cylinder head, intake pipe and fuel injection system according to the embodiment of the present subject matter.
  • FIG. 5. illustrates the front view of the cylinder head according the embodiment of the present subject matter.
  • Fig. 6a illustrates the isometric view of the intake pipe according to the embodiment of the present subject matter.
  • FIG. 6b illustrates another isometric view of the intake pipe according to the embodiment of the present subject matter.
  • FIG. 6c illustrates the front view of the intake pipe according to the embodiment of the present subject matter.
  • FIG. 7. illustrates the cut sectional view of the intake pipe with the fuel injection system 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.
  • the detailed explanation of the constitution of parts other than the present subject matter which constitutes an essential part has been omitted at suitable places.
  • An intake system can essentially be of two types namely, a fuel injection system and carburetor system.
  • the fuel injection system electronically injects and controls the air fuel mixture based on certain parameters determined by various plurality of sensors.
  • the carburetor mechanically controls the air fuel mixture based on the throttle applied by a rider of the two wheeled vehicle. For the IC engine to have smooth drivability, increased mileage, improved power and torque, the intake system and fuel injection system plays a significant role.
  • the air induction system comprises an air cleaner, an intake passage, a throttle body, a fuel injection valve and an intake pipe.
  • the air cleaner draws air from the atmosphere and filters it before supplying air to the downstream components.
  • the air cleaner passage directs the air flow from the air cleaner 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 a plurality of intake ports of the IC engine by the intake pipe.
  • the plurality of intake ports forms the part of a cylinder head of the IC engine which directs air fuel mixture to a combustion chamber.
  • the outlet of the plurality of intake ports is controlled by equal number of intake valves 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 pipe after throttling.
  • the fuel injection valve introduces fuel in metered quantity directly either inside the IC engine or inside the intake pipe 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 pipe.
  • ECU electronic Control Unit
  • a fuel pump which is configured to supply pressurized fuel to the fuel injector so that the fuel can be injected easily.
  • the pressure helps to 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.
  • a two intake port cylinder head for an IC engine is known in prior art in which two different intake ports will assist air fuel mixture for swirl motion and tumble motion in each intake port.
  • the port geometry determines the direction of air fuel mixture entry to the combustion chamber.
  • the swirl port opening is at the centre of cylinder head bore and tumble port opening is offset from the centre of the cylinder bore and placed beside one above the other.
  • Controlled Burn Rate is a port deactivation concept wherein turbulent kinetic energy of air fuel mixture is created at the correct time and place in the combustion chamber and a rapid and stable combustion occurs which allows to run the engine well above a Lambda Excess Air Ratio of 1.5. This provides low exhaust gas emissions and good fuel economy.
  • the two different intake ports, one swirl port and one tumble port is used to obtain controlled burn rate.
  • the throttle body is used for port deactivation. At part loads and lower engine speeds the tumble port is disconnected and only swirl port is activated. Further, due to optimum position of spark plug, lean burn with no difference in performance and fuel economy can be obtained.
  • the butterfly valve in the throttle body is designed to allow air fuel mixture only through one of the paths in the intake pipe to supply air fuel mixture only to swirl port. During, full throttle operation, air fuel mixture is allowed to enter both the paths. In this manner, efficient operation in all ranges of throttle position can be obtained.
  • the current invention discloses the intake path equipped with a short-circuited region by removing a small portion of partition wall separating them right before the valve in the fuel-air intake passage itself.
  • the intake pipe is designed to accommodate a fuel injection valve positioned to squirt fuel. This allows the fuel to be sprayed in proportion directly to each of the two intake ports. At the entrance of each port the charges mix efficiently and create uniform charge distribution. Additionally, even during part throttle operation, air fuel mixture enters both swirl and tumble ports. Hence, it serves dual functionality of making the start of combustion early and helps in noise reduction while adopting fuel injection.
  • the described invention relates to adapting a fuel injection system in the intake pipe in a split intake pipe design. Secondly, the short-circuiting of the otherwise separate streams that helps in supplying adequate fuel to the tumble port that is normally non-operational during part throttle condition. This ensures near uniform charge inside the cylinder. In addition, this ensures that the charge flow is adequate near the central spark plug tip. This helps in earlier, faster and complete combustion, thereby reducing chances of knocking and helps to make combustion much leaner by allowing further ignition advances.
  • Fig. 1 illustrates the two wheeled vehicle in accordance with one embodiment of the present invention.
  • the vehicle comprises of a frame assembly which is conventionally an underbone chassis frame which provides a generally open central area to permit D step-throughD mounting by a rider.
  • the frame assembly comprises of a head tube (102), a main tube (107), and a pair of side tubes 109 (only one shown).
  • the two wheeled vehicle extends from a front portion (F) to a rear portion (R) in a longitudinal axis.
  • the head tube (102) is disposed towards the front portion (F).
  • the main tube (107) extends downwardly and rearwardly from the head tube (102) forming a flat horizontal step-through portion (117).
  • the other end of the main tube (107) is connected with the pair of side-tubes (109) through a bracket (not shown).
  • the head tube (102) is configured to rotatably support a steering tube (104) and further connected to the front suspension system (121) at the lower end.
  • a handlebar support member (not shown) is connected to an upper end of the steering tube (102) and supports a handlebar assembly (106).
  • Two telescopic front suspension system 121 (only one is shown) is attached to a bracket (not shown) on the lower part of the steering tube (104) on which is supported the front wheel (119).
  • the upper portion of the front wheel (119) is covered by a front fender (103) mounted to the lower portion of the steering shaft (104).
  • the pair of side -tubes (109) extends from the other end of the main tube and are disposed parallel on either side of the vehicle width direction.
  • Each of the said side tube (109) includes a down frame section (109a) inclined and extending from the main tube (109) and gradually after a certain length extending rearward in a substantially horizontal direction to the rear of the vehicle.
  • a plurality of cross pipes (not shown) is secured in between the pair of side-tubes (109) at selected intervals to support vehicular attachments including a utility box (not shown), a seat assembly (108) and a fuel tank assembly (not shown).
  • a seat (108) is supported on the pair of side -tubes (109) on which a rider may sit.
  • the utility box (not shown) is supported between the front portions of the left and right end of the pair of side -tubes (109) so as to be disposed below the seat (108).
  • a fuel tank assembly (not shown) is disposed on between the rear portions of the pair of the side -tubes (109).
  • the rear wheel (113) is supported towards the rear side of the frame by the internal combustion (IC) engine (101) which is horizontally coupled swingably to the rear of the frame assembly of the two wheeled vehicle through a rear suspension system (not shown).
  • IC internal combustion
  • the IC engine transfers the drive directly to the rear wheel (113) as it is coupled directly to it through a continuously variable transmission (CVT) system.
  • the IC engine comprises CVT system, said CVT system disposed leftward of the IC engine (101) in the vehicle width direction.
  • FIG. 2 illustrates the side view of the rear portion of the two wheeled vehicle illustrating the IC engine swingably supported to the pair of side tubes (109) in accordance with the embodiment of the present subject matter. Further, Fig. 2. illustrates the air induction system supplying air fuel mixture to the IC engine.
  • the air induction system comprises an air cleaner (201), an air cleaner passage (202), a throttle body (302), an intake pipe (601) and the fuel injection valve (301).
  • the air cleaner (201) is on the rear portion (R) of the two wheeled vehicle above the rear wheel (113) and the direction of air flow is from the rear portion of the two wheeled vehicle to the front portion.
  • the throttle body (302) is disposed advantageously in the space formed below the storage box and above the crankcase of the IC engine (101).
  • the air cleaner passage (202) connects the air cleaner (201) outlet to the throttle body (302).
  • the entire arrangement is assembled to have ease of accessibility in assembling and disassembling as it permits tool movement to access clips tightened by the screwdriver once the utility box is removed.
  • the intake pipe (204) connects the throttle body (302) to the cylinder head (not shown).
  • the fuel injection valve (301) is suitably disposed on the intake pipe (601) and it is this mounting of the fuel injection valve (201) which is an important aspect of the present subject matter.
  • FIG. 3 illustrates a cut section of the IC engine (101) showing the main components of the IC engine (101) and representatively illustrates the entry of fuel by the fuel injection system according to the embodiment of the present subject matter.
  • the IC engine (101) comprises a cylinder block (205) on which a cylinder head (204) is disposed forming a combustion chamber (306) at the junction. Air fuel mixture is burnt in the combustion chamber (306) which causes a piston (not shown) to reciprocate within the cylinder block (205) and transfers mechanical energy to a rotatable crankshaft (not shown) which generates power due to the slider crank mechanism.
  • the cylinder head (204) comprises of two intake valves namely swirl intake valve (308) and tumble intake valve (not shown) operating within the swirl port (501) and the tumble port (502).
  • the valves are operated by means of rocker arms (310) actuated by a camshaft (309).
  • the swirl intake valve (308) and tumble intake valve are actuated by a single rocker arm.
  • a cam-chain (not shown) operably connects the rotatable crankshaft (not shown) and camshaft (309) to drive the it in the cylinder head (204).
  • Atmospheric air from the throttle body (302) and fuel sprayed through a fuel injection valve (301) enters the swirl port (501) and the tumble port (502) respectively.
  • the cylinder head (204) also comprises an exhaust port (307) whose end facing the combustion chamber (306) is controlled by the exhaust valve (not shown) and the exhaust port (307) directs the exhaust gases out of the combustion chamber (306) to a muffler (111) which is connected to the outer portion of the cylinder head (204).
  • 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 (204) during the exhaust stroke.
  • the throttle body (302) comprises a throttle housing (not shown), idle air controlled valve (302b), a throttle position sensor, and throttle control system.
  • 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 (not shown) is disposed downstream of the venturi which can be swiveled about an axis. Controlling this swivel, the control of air towards the first path (602) or both the first path (602) and second path (603) can be controlled.
  • the idle air control valve (302b) 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
  • FIG. 4 illustrates the exploded view of the cylinder head, intake pipe and fuel injection system according to the embodiment of the present subject matter.
  • the intake pipe (601) is placed on the cylinder head intake mounting face (204a) of the cylinder head (204).
  • An insulator pad (304) is placed between the intake pipe (601) and the cylinder head intake mounting face (204a).
  • the insulator pad (304) acts as a flame trap preventing the transfer of flame and heat from the combustion chamber (306) back to the intake pipe (601).
  • the intake pipe (601) comprises a port flange (608) which has threaded holes (608a).
  • the port flange (608) has a profile that matches with the surface of the cylinder head intake mounting face (204a) when assembled, and the threaded holes (608a) match corresponding thread holes on the insulator pad (304) and cylinder head intake mounting face (204a) through which fasteners can be inserted.
  • the cylinder head (204) comprises a cylinder head intake mounting face (204a) on one side facing the top of the two wheeled vehicle whose surface is capable of receiving the intake pipe (601).
  • the cylinder head (204) includes two intake ports namely, swirl port (501) and tumble port (502), that control the flow of the air-fuel mixture into a combustion chamber (306), and whose opening are defined on the cylinder head intake mounting face (204a).
  • the tumble port (502) opening is placed offset from the swirl port opening (501) and disposed above the swirl port (501) opening.
  • the swirl port (501) runs parallel to the tumble port (502) separately up to the combustion chamber (306).
  • the swirl port (501) and tumble port (502) opening have an oval shape while the exit at the combustion chamber (306) is circular. This oval shape increases the surface area of the port opening to allow inlet of more air and fuel while occupying lesser space on the cylinder head intake mounting face (204a).
  • the swirl port (501) is designed to have a profile with stronger curvature as compared with the profile of the tumble port (502), but the swirl port (501) has a lower inclination towards the valve axis.
  • Fig. 6a illustrates a front isometric view
  • Fig. 6b illustrates a side isometric view
  • Fig. 6c illustrates a front view
  • Fig. 7 illustrates a cross sectional view of the of the intake pipe (601) according the embodiment of the present invention.
  • the short circuiting pocket as described in the current invention is located in the bent portion of intake pipe so that larger droplets of fuel, due to centrifugal effect enters into the tumble port and make swirl port flow leaner than usual and free of larger droplets, This helps to reduce loss of fuel due to fuel sticking onto cylinder walls and helps in scraping down the fuel to oil sump by oil control ring on the piston, while charge is in swirl motion inside the cylinder, This short circuiting pocket also reduces carbon monoxide and NOx emission, knocking, fuel loss, oil dilution. While tumble port flow, which otherwise gives no flow during part throttle, will carry the reminiscent fuel and burn completely to yield better combustion.
  • the present invention is also applicable where the intake pipe is straight.
  • Swirl port (501) creates swirl motion in the charge while it enters the combustion chamber (306) from the first path (602) of the intake pipe (601).
  • Tumble port (502) creates tumble motion in the charge while it enters the combustion chamber (306) from the second path (603) of the intake pipe (601).
  • the air from the throttle body (302) is divided when the flow exits the throttle body (302) and enters the intake pipe (601).
  • the air is then maintained in separate streams due to the partition wall (604) until they get mixed inside the combustion chamber (306), except for the mixing region (620) on the separation in partition wall (604) on the intake pipe (601).
  • the short circuiting pocket provides a bypass between those two streams, the flow may not be completely exclusive of each other.
  • the port end (610) of the intake pipe is provided with a cut/passage on its partition wall. This allows the charge to be bypassed from the first path (602) to the second path (603) especially during lower part throttle operation.
  • Spark plug (305) is mounted on cylinder head (204) so that the tip of spark plug is central to the combustion chamber (306). Otherwise, without bypass cut, there have to be two spark plugs offset in the opposite direction to the centre.
  • the charge enters the cylinder through bottom swirl port (501). Due to the short circuiting region, some amount of charge also enters through tumble port (502).
  • the charge flow from tumble port (502) reaches the central spark plug more easily than the swirling charge does. This ensures that the combustion starts early, flame propagates faster, and combustion is complete because of more uniform air-fuel mixture. In addition, this enables advancing of ignition timing without knocking and lean burning to have lower Brake Specific Fuel Consumption (BSFC) etc.
  • BSFC Brake Specific Fuel Consumption
  • the short circuiting part forming the mixing region (620) facilitates the position of the fuel injection valve, wherein the fuel spray is squirted into the mixing region (620) towards the swirl port (501) and tumble port (502).
  • the intake pipe (601) is provided with a injector region (605) having a mounting flange and an opening to allow access of the fuel injector valve (301).
  • FIG. 3 and Fig. 7 illustrates the fuel spray path taken when the fuel injector is arranged in the intake pipe (601) to direct fuel in the embodiment of the present subject matter.
  • the IC engine is inclined such that its cylinder bore axis is at an angle between 0° to 15° inclination with respect to the horizontal.
  • the swirl port (501) and tumble port (502) is facing upper direction of the two wheeled vehicle.
  • the intake pipe (601) is so designed to enable the position and mounting of the fuel injection valve (301) and is one of the important aspects of the present subject matter.
  • the fuel injection valve (301) is mounted angularly at a predetermined angle ( ⁇ ) to the horizontal plane Y-Y to achieve the fuel spray target on both the swirl port (501) and tumble port (502). In one embodiment, the fuel injection valve (301) is placed at the predetermined angle ( ⁇ ) of between 75° to 88° to the vehicle horizontal axis (Y-Y).
  • the fuel injection valve (301) is of single fuel spray type that can squirt fuel spray in one angular direction. In one embodiment the angle of squirt is in the range 8° to 15° from the fuel tip.
  • the injector tip (P) is disposed at a predetermined vertical distance (a) from the cylinder head intake mounting face (204a) such that, the ratio of the vertical distance (a) between the tip of the fuel injection valve (301) and the port end (608) and the cross-sectional width E & F of the any of the two intake ports (501 & 502) is between 2.5 to 3, and the extrapolation of the fuel injector axis (X-X) does not intersect the partition wall (604).
  • This ratio helps in directing the fuel injection to the port end (608) to enter both the swirl port (501) and tumble port (502) efficiently & in a required manner.
  • the fuel injection valve is disposed in that position on the intake pipe (204) such that fuel spray is optimized so that the fuel spray target is on a sharp edge element (304a) of the insulator pad (304) to divide a fuel spray cone (606) from the fuel injection valve (301) to enter both the swirl port (501) and tumble port (502).
  • the fuel injection valve (301) is also mounted on the end of a curved portion (621) of the intake pipe (601) such that the fuel spray travels the shortest distance to reach the outlet of the swirl port (501) and tumble port (502) with minimum wall wetting.
  • the intake pipe (601) has a nonlinear curved profile and divided into a curved portion (621) and straight portion (622), and wherein the curved portion extends from the port end (608) to the tip of the fuel injection valve (301), and substantially straight portion (622) extends from the tip of the fuel injection valve (301) to the throttle end (607).
  • the intake pipe (601) has the partition wall (604) disposed such that, the width (B) of the first path (602) at the throttle end (607) is greater than the width (A) of the first path (602) at the port end (608), and wherein the width (H) of the second path (603) at the throttle end (607) is lesser than or equal to the width (G) of the second path (603) at the port end (608) whereby the partition wall (604) is biased more towards first path (602) than the second path (603).

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

La culasse (204) d'un moteur à combustion interne (101) comprend deux soupapes d'admission, à savoir une soupape d'admission à tourbillon longitudinal (308) et une soupape d'admission à tourbillon transversal fonctionnant dans un orifice de tourbillon longitudinal (501) et un orifice de tourbillon transversal (502). La charge est pulvérisée à travers une soupape d'injection de carburant (301) dans l'orifice de tourbillon longitudinal et l'orifice de tourbillon transversal, respectivement. Une région de mélange (620) est facilitée par la position de la soupape d'injection de carburant, la pulvérisation de carburant étant projetée dans la région de mélange (620) vers l'orifice de tourbillon longitudinal et l'orifice de tourbillon transversal. Le rapport de la distance verticale (a) entre le point de pulvérisation de carburant (P) et la base de l'extrémité d'orifice (Y-Y) et la largeur de section transversale (E, F) d'au moins l'un des deux orifices d'admission est compris entre 1,5 et 3. La présente invention fournit une entrée de charge à la fois à partir de l'orifice de tourbillon longitudinal et de l'orifice de tourbillon transversal pour assurer une distribution de charge adéquate et éviter un bruit de moteur indésirable.
PCT/IB2018/051270 2017-03-02 2018-02-28 Système d'induction d'air destiné à un véhicule à deux roues WO2018158698A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201880024263.2A CN110494643B (zh) 2017-03-02 2018-02-28 一种用于两轮车辆的空气感应系统
BR112019018086-9A BR112019018086A2 (pt) 2017-03-02 2018-02-28 Sistema de indução de ar para um veículo de duas rodas

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Application Number Priority Date Filing Date Title
IN201741007383 2017-03-02
IN201741007383 2017-03-02

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021192927A1 (fr) * 2020-03-26 2021-09-30 本田技研工業株式会社 Dispositif d'admission de moteur à combustion interne pour véhicule du type à selle
WO2021191920A1 (fr) * 2020-03-26 2021-09-30 Tvs Motor Company Limited Unité de puissance et son élément d'admission

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JP2016070206A (ja) * 2014-09-30 2016-05-09 本田技研工業株式会社 内燃機関の吸気装置

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