WO2022003722A1 - Système d'injection de combustible et acheminement par tuyau flexible associé pour un véhicule - Google Patents

Système d'injection de combustible et acheminement par tuyau flexible associé pour un véhicule Download PDF

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Publication number
WO2022003722A1
WO2022003722A1 PCT/IN2021/050634 IN2021050634W WO2022003722A1 WO 2022003722 A1 WO2022003722 A1 WO 2022003722A1 IN 2021050634 W IN2021050634 W IN 2021050634W WO 2022003722 A1 WO2022003722 A1 WO 2022003722A1
Authority
WO
WIPO (PCT)
Prior art keywords
wheeled vehicle
gaseous fuel
injector
injection system
fuel injection
Prior art date
Application number
PCT/IN2021/050634
Other languages
English (en)
Inventor
Meibalan Mugilan
Rawat ANKIT
Subramoniam Chithambaram
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 MX2022014063A priority Critical patent/MX2022014063A/es
Priority to PE2022003060A priority patent/PE20230564A1/es
Publication of WO2022003722A1 publication Critical patent/WO2022003722A1/fr

Links

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
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02M21/0227—Means to treat or clean gaseous fuels or fuel systems, e.g. removal of tar, cracking, reforming or enriching
    • 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
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02M21/023—Valves; Pressure or flow regulators in the fuel supply or return system
    • F02M21/0239—Pressure or flow regulators therefor
    • 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
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02M21/0248—Injectors
    • F02M21/0278—Port fuel injectors for single or multipoint injection into the air intake system
    • 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
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02M21/0248—Injectors
    • F02M21/0281—Adapters, sockets or the like to mount injection valves onto engines; Fuel guiding passages between injectors and the air intake system or the combustion chamber
    • 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
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02M21/029—Arrangement on engines or vehicle bodies; Conversion to gaseous fuel supply systems
    • 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
    • Y02T10/30—Use of alternative fuels, e.g. biofuels

Definitions

  • the present subject matter relates a multi-wheeled vehicle working on gaseous fuel and more particularly to an improved layout for fuel injection for multi-wheeled vehicle wherein an engine is disposed in rear portion of the vehicle.
  • a vehicle running on gas-based fuel includes a gas fuel storing container such as a cylinder wherein pressurized gas fuel is stored.
  • the gas fuel from such a container undergoes various pressure reduction stages and ultimately gets fed to the engine at atmospheric / sub-atmospheric pressures to the engine.
  • Prevalent fueling system is a vacuum -based system wherein the fuel is supplied at atmospheric / sub-atmospheric pressures to the engine.
  • Combustion of gaseous fuel inside the engine leads to emission of exhaust gases comprising of hydrocarbons and other pollutants which leads to air pollution. It has always been an objective to minimize such emissions to reduce air pollution.
  • a low-pressure fdter downstream of a second stage pressure reduction or third stage pressure reduction through appropriate reducer
  • a low-pressure fdter downstream of a second stage pressure reduction or third stage pressure reduction through appropriate reducer
  • FIG. 1 illustrates a left side view of an exemplary vehicle, as per the present invention.
  • FIG. 2 illustrates a rear view of engine compartment of the three-wheeled vehicle.
  • FIG. 3 illustrates a perspective view of the engine compartment of the three- wheeled vehicle as per the present invention.
  • Fig. 4 illustrates a top view of the engine compartment as per an embodiment of the present invention.
  • FIG. 5 illustrates the mounting of the fuel injector on the intake pipe as per the present invention
  • Fig. 6 and Fig. 7 illustrate a perspective view of mounting of the low pass filter on the crankcase of the vehicle as per an embodiment of the present invention.
  • Fig. 8 illustrates a perspective view illustrating the injector hose routing in the engine cabin as per an embodiment of the present invention.
  • the fuel injectors open a nozzle for a predetermined duration thereby metering the quantity of fuel being supplied. This works fine with the fuel injectors as far as the density of the fuel remains constant. Also, for gaseous fuel-based engines, the density of the gaseous fuel is also dependent on the temperature of the gas. Hence, it becomes a challenge to meter an exact quantity of fuel to be supplied to the gaseous fuel-based engines.
  • the problem of variation in density of gaseous fuel is minimized using a rail sensor which measures the temperature and pressure of the gaseous fuel prior and communicates the same to an electronic control unit which sends an appropriate signal to fuel injector for metering the gaseous fuel to be fed inside the engine.
  • a temperature variation between the rail sensor and a fuel injector may also lead to inaccurate data for the electronic control unit.
  • the injector hose between the rail sensor and the fuel injector cannot be too long.
  • the heat generated from the engine may further lead to inaccurate signal from the rail sensor to the electronic control unit.
  • an improved fuel injection system layout is designed such that the inaccuracy of signal is resolved by configuring the location of the rail sensor away from the cylinder head.
  • the rail sensor is mounted on the low pass filter and the low pass filter itself is mounted on crankcase of the engine using a first mounting bracket.
  • the layout as per the present invention achieves an optimal distance between the rail sensor and the fuel injector and thereby enables achieving the contradictory requirements simultaneously.
  • the vehicle width increases.
  • the fuel hose routing becomes challenging. If the above elements are placed too closely, the injector hose and the input hose tend to have sharp bends resulting in breakage of either the injector pip or the injector hose and the input hose at the location of the bend. This reduces the life of the fuel injector, injector hose and the input hose. The damage results in frequent servicing, adding extra cost of maintenance to the customer, which is undesirable.
  • the present invention describes an improved layout wherein the low pass fdter and a rail sensor are optimally disposed. Also, the present invention, in yet another embodiment, describes an injector hose and the input hose routing without sharp bends to increase life of the fuel injector. It is contemplated that the concepts of the present invention may be applied to any type of vehicle employing the similar configuration within the spirit and scope of this invention.
  • 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 siting on the driver seat in the driver cabin of the three wheeled vehicle.
  • a longitudinal axis refers to a front to rear axis relative to the load deck
  • a lateral axis refers generally to a side to side, or left to right axis relative to the load deck.
  • Fig. 1 illustrates a left side view of an exemplary three wheeled vehicle, as per the present invention.
  • a three wheeled vehicle is shown for brevity and the present invention is applicable to a vehicle with more than three wheels also until the engine of the vehicle is located in rear portion of the vehicle behind a passenger cabin.
  • Fig. 1 shows a three wheeled vehicle 100, driver cabin 101, driver seat 102, passenger cabin 103, engine cabin 104, front wheel 105, rear wheel 106, a partition wall 107.
  • the present invention is also applicable to vehicles wherein the engine is located in front of the vehicle.
  • the presently illustrated three wheeled vehicle has the engine located on rear portion of the vehicle behind the passenger cabin 103.
  • the driver cabin 101 is separated from the passenger cabin 102 using the partition wall 107.
  • the engine is placed along the longitudinal direction of the vehicle for ease of serviceability.
  • FIG. 2 illustrates a rear view of engine compartment of such a three-wheeled vehicle.
  • Fig. 2 shows an engine 201 placed within the engine cabin 104.
  • front wheel 105, rear wheel 106 and rear wheel 106' are also shown.
  • the engine is placed closer to the central longitudinal axis of the vehicle. This axis passes through the center of the vehicle from front to rear.
  • FIG. 3 illustrates a perspective view of the engine compartment of the three- wheeled vehicle as per the present invention.
  • Fig. 3 shows the engine 201 positioned vertically inclined to the longitudinal axis of the vehicle below a horizontal frame member 301 and above an exhaust muffler 303.
  • a gaseous fuel hose 302 is also shown above the cylinder head 203.
  • the gaseous fuel hose consists of two parts: a first part 402between a high pass filter (also called as second stage reducer, the names have been used interchangeably and mean the same) and the low pass filter and a second part 408 between the low pass filter and the fuel injector.
  • a high pass filter also called as second stage reducer, the names have been used interchangeably and mean the same
  • the low pass filter and a second part 408 between the low pass filter and the fuel injector.
  • One of the challenge is to minimize and optimize this gaseous fuel hose length.
  • Fig. 4 illustrates a top view of the engine compartment as per an embodiment of the present invention.
  • FIG. 4 shows a second stage reducer 401 which reduces pressure of the gaseous fuel, received through a high-pressure hose 403 supplied at a high pressure from a fuel pump (not shown), to a pressure closer to atmospheric pressure level or a predetermined level and provides the output to a low pass filter 405 through an input hose 402.
  • This low pass filter 405 further reduces the pressure of the gaseous fuel to an atmospheric or sub atmospheric level.
  • the low pass filter 405 is either integrally formed or attached to the low pass filter 405 and the low pass filter 405 is mounted to the crankcase 415 of the engine 201 using a first mounting bracket 407 so as to provide a rigid support to both the low pass filter 405 and the rail sensor 404.
  • the low pass filter 405 filters any dust or impurities inside the gaseous fuel so as to avoid blockage/clogging of nozzle of a fuel injector 412.
  • the region in vicinity of the cylinder head 203 is hotter compared to the region in the vicinity of the crankcase 415.
  • the rail sensor and the low pass filter 405 are configured adjacent to the crankcase 415 to avoid any excess heat to the rail sensor and the low pass filter.
  • Fig. 4 further illustrates a shorter first path 406 according to a known art wherein the shorter first path 406 connects the gaseous fuel from the low pass filter
  • an axis X-X’ of the fuel injector is oriented at an angle away from the axis Y-Y’ and the injector hose is configured along a second path 408 which is obliquely inclined to the cylinder head axis Y-Y’ and the second path 408 is curved around outwardly away from the cylinder head axis Y-Y ⁇
  • the region A accommodates the injector hose along the second path 408
  • the region B accommodates the low pass filter 405 and the rail sensor 404. This configuration helps in eliminating the kink & sharp bend formation of the injector hose along the second path 408 as well as avoid thermal issues for the functioning of the rail sensor cum hose while additionally achieving shortest hose length.
  • Figure 4 also shows a first cable guide 409, and a second cable guide 411 attached to the crankcase 415 and the cylinder head 203 respectively to support the injector hose along the second path 408.
  • An electrical coupler 413 is used to connect the fuel injector 412 to a power supply and for obtaining signal from the electronic control unit.
  • the first cable guide 409 and the second cable guide 411 provide support to the injector hose and thereby avoid the vibration and noise produced due to shaking of the fuel hose. It also avoids contact of the injector hose 408 with the hot surfaces such as cylinder head 203.
  • Fig. 5 illustrates the mounting of the fuel injector on the intake pipe 414 as per one embodiment of the present invention.
  • Fig. 5 shows the fuel injector 412 mounted on the intake pipe 414.
  • the coupler 413 and intake pipe 414 are placed substantially orthogonal to each other and the injector hose axis X-X’ along the second path 408 is placed 180 degrees to the coupler 413 while being substantially orthogonal to the intake pipe 414.
  • This configuration enables ease of maintenance and serviceability of the fuel injector and the injector hoses. Since the rail sensors are heavily sensitive to temperature and pressure variations, frequent calibration is required for the rail sensors. Further, this present layout configuration also enables ease of calibration of rail sensor.
  • FIG. 6 illustrate a perspective view of mounting of the low pass filter 405 on the crankcase of the vehicle as per an embodiment of the present invention.
  • Fig. 7 shows injector hose 408, cylinder head 203, rail sensor 404 attached to low pass filter 405 and the first mounting bracket 407 mounted to the crankcase 415.
  • the first mounting bracket 407 is provided with sufficient stiffening to withstand the engine vibrations according to the resonating frequency of vibration of the engine.
  • Fig. 8 illustrates a perspective view of the low pass filter 405 mounting and injector hose 408 routing and illustrating the injector hose routing in the engine cabin as per an embodiment of the present invention.
  • Fig. 8 shows engine cabin 104, coupler 413, horizontal frame member 301, injector hose 302, input hose 402, high pressure hose 403, low pass filter 405, a first path 406 and a first mounting bracket 407 on crankcase 415.
  • the low pass filter 405 present in the engine cabin 104 according to present invention enables ease of access to filter element in vehicle condition without removal of fuel filter from vehicle. Further since low pass filter 405 is located in the region B away from hot surfaces of cylinder head and cylinder block, it can be accessed without endangering technician’s hands thus improves serviceability of the low pass filter.

Abstract

La présente invention concerne un véhicule à plusieurs roues fonctionnant à combustible gazeux et, plus particulièrement, un agencement d'injection de combustible pour un véhicule à plusieurs roues (100). Un capteur à rail (404) est soit formé en une seule pièce avec un filtre passe-bas (405), soit fixé à ce dernier, et le filtre passe-bas (405) est monté sur le carter (415) du moteur (201) à l'aide d'un premier support de montage (407), afin d'assurer un support rigide pour le filtre passe-bas (405) et pour le capteur à rail (404). Un axe X-X' de l'injecteur de combustible, le long d'un second circuit (408), est incliné de manière oblique par rapport à l'axe Y-Y' de la culasse de cylindre, et le second circuit (408) est incurvé vers l'extérieur à l'opposé de l'axe Y-Y' de la culasse de cylindre. Dans cette configuration, un coude serré du tuyau flexible de l'injecteur, le long du second circuit (408), peut être évité.
PCT/IN2021/050634 2020-06-30 2021-06-30 Système d'injection de combustible et acheminement par tuyau flexible associé pour un véhicule WO2022003722A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
MX2022014063A MX2022014063A (es) 2020-06-30 2021-06-30 Sistema de inyeccion de combustible y enrutamiento de manguera del mismo para un vehiculo.
PE2022003060A PE20230564A1 (es) 2020-06-30 2021-06-30 Sistema de inyeccion de combustible y tendido de manguera del mismo para un vehiculo

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN202041027881 2020-06-30
IN202041027881 2020-06-30

Publications (1)

Publication Number Publication Date
WO2022003722A1 true WO2022003722A1 (fr) 2022-01-06

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Application Number Title Priority Date Filing Date
PCT/IN2021/050634 WO2022003722A1 (fr) 2020-06-30 2021-06-30 Système d'injection de combustible et acheminement par tuyau flexible associé pour un véhicule

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Country Link
MX (1) MX2022014063A (fr)
PE (1) PE20230564A1 (fr)
WO (1) WO2022003722A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5329908A (en) * 1993-06-08 1994-07-19 Cummins Engine Company, Inc. Compressed natural gas injection system for gaseous fueled engines
EP1024278A1 (fr) * 1999-01-29 2000-08-02 Renault Injecteur doseur-distributeur de gaz pour moteur à combustion interne
EP2024629A1 (fr) * 2006-05-09 2009-02-18 Lovato Gas S.p.A. Dispositif de filtration permettant de filtrer des carburants gazeux dans des systèmes adressant des gaz à des moteurs à combustion interne
WO2010017442A1 (fr) * 2008-08-08 2010-02-11 Mavinahally Nagesh Siddabasapp Bloc coulé d'un seul tenant et carter de vilebrequin supérieur
WO2011091571A1 (fr) * 2010-01-28 2011-08-04 无锡开普动力有限公司 Moteur à gaz naturel
EP3426957A1 (fr) * 2016-03-11 2019-01-16 Matrix S.p.A. Injecteur pour système d'alimentation en combustible gazeux d'un moteur à combustion interne
US20190085791A1 (en) * 2017-09-21 2019-03-21 Worthington Industries, Inc. Fuel module system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5329908A (en) * 1993-06-08 1994-07-19 Cummins Engine Company, Inc. Compressed natural gas injection system for gaseous fueled engines
EP1024278A1 (fr) * 1999-01-29 2000-08-02 Renault Injecteur doseur-distributeur de gaz pour moteur à combustion interne
EP2024629A1 (fr) * 2006-05-09 2009-02-18 Lovato Gas S.p.A. Dispositif de filtration permettant de filtrer des carburants gazeux dans des systèmes adressant des gaz à des moteurs à combustion interne
WO2010017442A1 (fr) * 2008-08-08 2010-02-11 Mavinahally Nagesh Siddabasapp Bloc coulé d'un seul tenant et carter de vilebrequin supérieur
WO2011091571A1 (fr) * 2010-01-28 2011-08-04 无锡开普动力有限公司 Moteur à gaz naturel
EP3426957A1 (fr) * 2016-03-11 2019-01-16 Matrix S.p.A. Injecteur pour système d'alimentation en combustible gazeux d'un moteur à combustion interne
US20190085791A1 (en) * 2017-09-21 2019-03-21 Worthington Industries, Inc. Fuel module system

Also Published As

Publication number Publication date
PE20230564A1 (es) 2023-04-04
MX2022014063A (es) 2022-11-30

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