GB2527361A - Fuel delivery and ignition system - Google Patents

Fuel delivery and ignition system Download PDF

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Publication number
GB2527361A
GB2527361A GB1411019.1A GB201411019A GB2527361A GB 2527361 A GB2527361 A GB 2527361A GB 201411019 A GB201411019 A GB 201411019A GB 2527361 A GB2527361 A GB 2527361A
Authority
GB
United Kingdom
Prior art keywords
ignition system
fuel
delivery
outlet
housing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB1411019.1A
Other versions
GB201411019D0 (en
Inventor
John Anthony King
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB1411019.1A priority Critical patent/GB2527361A/en
Publication of GB201411019D0 publication Critical patent/GB201411019D0/en
Publication of GB2527361A publication Critical patent/GB2527361A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P23/00—Other ignition
    • F02P23/04—Other physical ignition means, e.g. using laser rays
    • F02P23/045—Other physical ignition means, e.g. using laser rays using electromagnetic microwaves
    • 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
    • F02M21/0275—Injectors for in-cylinder direct injection, e.g. injector combined with spark plug
    • 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/0603—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive operating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P13/00—Sparking plugs structurally combined with other parts of internal-combustion engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P15/00—Electric spark ignition having characteristics not provided for in, or of interest apart from, groups F02P1/00 - F02P13/00 and combined with layout of ignition circuits
    • F02P15/006—Ignition installations combined with other systems, e.g. fuel injection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P23/00—Other ignition
    • F02P23/04—Other physical ignition means, e.g. using laser rays
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/02—Constructional details
    • H01S3/025—Constructional details of solid state lasers, e.g. housings or mountings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
    • H01S3/06—Construction or shape of active medium
    • H01S3/0602—Crystal lasers or glass lasers
    • H01S3/061—Crystal lasers or glass lasers with elliptical or circular cross-section and elongated shape, e.g. rod
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/09—Processes or apparatus for excitation, e.g. pumping
    • H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
    • H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
    • H01S3/094049—Guiding of the pump light
    • H01S3/094053—Fibre coupled pump, e.g. delivering pump light using a fibre or a fibre bundle
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/09—Processes or apparatus for excitation, e.g. pumping
    • H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
    • H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
    • H01S3/0941—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a laser diode
    • H01S3/09415—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a laser diode the pumping beam being parallel to the lasing mode of the pumped medium, e.g. end-pumping
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Electromagnetism (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Combustion Methods Of Internal-Combustion Engines (AREA)

Abstract

A fuel delivery and ignition system 1 comprises a housing 10 for insertion in the fuel inlet aperture of an engine cylinder, a fuel inlet 11 in the housing to receive a supply of fuel and a fuel outlet 12 in the housing to deliver fuel into the cylinder, a valve to control the flow of fuel flowing from the inlet to the outlet, a transducer 30 to measure the pressure in the cylinder and an optical ignition device 20 in the housing to ignite fuel in the cylinder controlled by the pressure measured by the transducer. An inlet valve member 41 may be operated by a piezo electric stack solenoid 43. The ignition system is preferably a laser powered plasma ignition system and may include a highly concentrated ytterbium doped crystal fibre rod 22.

Description

S
I
TITLE: Fuel Delivery and Ignition System The present invention relates to a thel delivery and ignition system.
According to the present invention there is provided a thel delivery and ignition system comprising: a) a housing for insertion in the thel inlet aperture of an engine cylinder, b) a fuel inlet in the housing to receive a supply of fuel and a fuel outlet in the housing to deliver thel into a cylinder, c) a valve to control the flow of fuel flowing from the inlet to the outlet d) a transducer to measure the pressure in a cylinder, e) an optical ignition device in the housing to ignite fuel in a cylinder controlled by the pressure measured by the transducer.
Preferably the valve is controlled by the pressure measured by the transducer.
Preferably the valve includes an inlet valve member adjacent the fuel inlet controlling flow of fuel into a cavity in the housing, and an outlet valve member adjacent the fuel outlet biased into a closed position but which opens when the fuel pressure in the cavity reaches a predetermined value.
Preferably the outlet valve member is a sleeve which reciprocates from a first position spring biased against a sealing face adjacent the gas outlet to prevent gas passing through the outlet to a second position away from the sealing face compressing the spring to allow flow of gas from the outlet.
Preferably the inlet valve member is operated by a piezo electric stack solenoid. The solenoid may be controlled by a PWM signal.
Preferably the optical ignition system varies the position of the ignition of fuel in a cylinder.
Preferably the ignition system is a laser powered plasma ignition system. The system may include a laser diode coupled to an amplification processor/multiplexer.
Preferably the ignition system extends through the housing and the outlet member sleeve is cylindrical co-axially aligned with the ignition system. The ignition system may include crystal fiber rod highly concentrated ytterbium doped. Preferably the rod is secured inside a hermetically sealed tube with a focusing lens and a synthetic self-cleaning sapphire window at an end of the rod, in use, inside the combustion chamber.
An embodiment of the invention will now be described with reference to the accompanying drawings in which: Figure 1 shows a side view of fuel delivery and ignition system, Figure 2 shows a cross section view of Figure 1, and Figures 3A and 3B shows enlarged cross section views of Figure 1 of the sleeve in the first and second positions.
Referring to the drawings there is shown a fuel delivery and ignition system 1.
A housing 10 is provided for insertion in the fuel inlet aperture of an engine cylinder (not shown) in a similar manner to a diesel engine injector.
Housing 10 has fuel inlet 11 to receive a supply of fuel such as LPGILNG gas and a fuel outlet 12 in the housing to deliver fuel into a cylinder. LPG gas enters inlet 11 and is pressurised in a cavity (not shown) in the housing to a pressure of 300-900 bar.
An optical ignition system 20 is provided by a laser beam which travels through the housing 10 via a straight fibre optic core 21. The optical ignition system can vary the position of the ignition of fuel in a cylinder. A crystal fiber rod 22 is highly concentrated ytterbium doped and passes through the core 21. Preferably the rod 22 is secured inside a hermetically sealed tube with a focusing lens 23 and a synthetic self-cleaning sapphire window 24 at an end of the rod, in use, inside the combustion chamber.
A transducer 30 is provided adjacent the fuel outlet to measure pressure in an engine cylinder.
Transducer 30 is connected to a circuit, via a wire 31 and socket 32, connected to the optical ignition system.
A valve is provided to control the flow of fuel flowing from the inlet to the outlet and is also controlled by the pressure measured by the transducer.
The valve includes an inlet valve member 41 adjacent the fuel inlet controlling flow of fuel into the cavity in the housing via conduit 42. Valve member 41 is operated by a piezo electric stack solenoid 43 controlled by a PWM (pulse width modulated) signal connected contact 44.
An outlet valve member is provided in the form of a sleeve 50 biased to a closed positon (see Figure 3A) against a sealing face 51 by a spring 52 to prevent gas passing through to the outlet 12 from the housing cavity. Sleeve 50 moves to a second position away from the sealing face 51 (see Figure 3B) compressing the spring 52 when the fuel pressure in the cavity reaches a predetermined value, so allowing flow of gas from the outlet 12 into the cylinder. Sleeve 40 reciprocates co-axially with the axis of the fibre optic core 21.
When the PWM signal is on, the solenoid 43 opens inlet valve member 41 allowing the common rail pressure to flow fuel into the cavity. Pressure in the cavity builds until the sleeve moves to the second positon allowing fuel to enter the cylinder. When the PWM signal is off, the solenoid 43 closes, the gas pressure is closed off from the common rail and the sleeve returns instantly to the first position, assisted by the spring 52 and the rising cylinder pressure.
Because the system 1 is intended to deliver a vapour gas, the gas outlet has to be larger than a conventional diesel injector. The sleeves 40 allows this. Sleeve 40 may be made of sintered carbon steel and is self-cleaning.
The system I delivers metered fuel quantities directly into a cylinder, both in homogenous and stratified charges at variable pressure ranges, 300-900 bars.
The optical ignition system 20 can deliver a plasma ignition beam 1.6kW. in pulses of 25-us with pump power @ 4OmJ for a total duration of I mis, this is achieved by the crystal fiber rod with highly concentrated ytterbium doping, it contains a focusing lens structure fitted into a hermetically sealed inner tube with a synthetic sapphire window located at the base of the housing and positioned inside the roof ofthe combustion chamber. The crystal rod tube is internally gas cooled to a maximum of 90c. This type of igniter technology permits extra lean bum combustion, reducing harmful exhaust emissions and improving fuel economy significantly.
The transducer 30 prime ftrnction is to measure cylinder peak pressures, this pennits much more efficient engine management and also allows later and more accurate ignition delivery by allowing the engine control module to analyse each engine cylinders peak pressure on an individual basis related to fuel volume and ignition timing. The transducer has a second membrane function to ensure the outlet valve member has no leak issues when sleeve is closed.
The invention may take a form different to that specifically described above.
Further modifications will be apparent to those skilled in the art without departing form the scope of the present invention.

Claims (13)

  1. CLAIMS1. A fuel delivery and ignition system comprising: a) a housing for insertion in the the! inlet aperture of an engine cylinder, b) a the! inlet in the housing to receive a supply of fuel and a the! outlet in the housing to deliver the! into a cylinder, c) a valve to control the flow of the! flowing from the inlet to the outlet d) a transducer to measure the pressure in a cylinder, e) an optical ignition device in the housing to ignite thel in a cylinder controlled by the pressure measured by the transducer.
  2. 2. A fuel delivery and ignition system according to claim 1, wherein the valve is controlled by the pressure measured by the transducer.
  3. 3. A fuel delivery and ignition system according to claim I or 2, wherein the valve includes an inlet valve member adjacent the fuel inlet controlling flow of fhel into a cavity in the housing, and an outlet valve member adjacent the fuel outlet biased into a closed position but which opens when the fuel pressure in the cavity reaches a predetermined value.
  4. 4. A the! delivery and ignition system according to any preceding claim, wherein the outlet valve member is a sleeve which reciprocates from a first position spring biased against a sealing thee adjacent the gas outlet to prevent gas passing through the out!et to a second position away from the sealing face compressing the spring to allow flow of gas from the outlet.
  5. 5. A thel delivery and ignition system according to any preceding claim, wherein the in!et valve member is operated by a piezo electric stack solenoid.
  6. 6. A theE delivery and ignition system according to claim 5, wherein the solenoid is controlled by a PWM signal.
  7. 7. A thel delivery and ignition system according to any preceding claim, wherein the optical ignition system varies the position of the ignition of thel in a cylinder.
  8. 8. A the! delivery and ignition system according to any preceding claim, wherein the ignition system is a laser powered plasma ignition system.
  9. 9. A the! delivery and ignition system according to claim 9, wherein the system includes a laser diode coupled to an amplification processor/multiplexer.
  10. 10. A fuel delivery and ignition system according to any preceding claim, wherein the ignition system extends through the housing and the outlet member sleeve is cylindrical co-axially aligned with the ignition system.
  11. Ii. A fuel delivery and ignition system according to any preceding claim, wherein the ignition system includes crystal fiber rod highly concentrated ytterbium doped.
  12. 12. A fuel delivery and ignition system according to claim 11, wherein the rod is secured inside a hermetically sealed tube with a focusing lens and a synthetic self-cleaning sapphire window at an end of the rod, in use, inside the combustion chamber.
  13. 13. A fuel delivery and ignition system substantially as hereinbefore described with reference to and as shown in the accompanying drawings.
GB1411019.1A 2014-06-20 2014-06-20 Fuel delivery and ignition system Withdrawn GB2527361A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1411019.1A GB2527361A (en) 2014-06-20 2014-06-20 Fuel delivery and ignition system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1411019.1A GB2527361A (en) 2014-06-20 2014-06-20 Fuel delivery and ignition system

Publications (2)

Publication Number Publication Date
GB201411019D0 GB201411019D0 (en) 2014-08-06
GB2527361A true GB2527361A (en) 2015-12-23

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GB1411019.1A Withdrawn GB2527361A (en) 2014-06-20 2014-06-20 Fuel delivery and ignition system

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3736417A1 (en) * 1986-11-11 1988-05-26 Freiberg Brennstoffinst Combined ignition and monitoring device for burners
DE102004012073A1 (en) * 2004-03-12 2005-09-29 Robert Bosch Gmbh Ignition control device for a combustion engine using laser impulse ignition evaluates pressure changes in the combustion chamber
DE102006000097A1 (en) * 2005-03-01 2006-09-07 Denso Corp., Kariya Laser ignition system for internal combustion engine is triggered by an electronic control unit
US20060243238A1 (en) * 2005-04-28 2006-11-02 Denso Corporation Laser type engine ignition device
JP2006329186A (en) * 2005-04-28 2006-12-07 Denso Corp Laser ignition device
US20090159031A1 (en) * 2007-12-19 2009-06-25 Friedrich Gruber Laser ignition apparatus
US20120151931A1 (en) * 2010-12-15 2012-06-21 The Board Of Trustees Of The Leland Stanford Junior University Distributed Ignition Of Fuels Using Nanoparticles

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3736417A1 (en) * 1986-11-11 1988-05-26 Freiberg Brennstoffinst Combined ignition and monitoring device for burners
DE102004012073A1 (en) * 2004-03-12 2005-09-29 Robert Bosch Gmbh Ignition control device for a combustion engine using laser impulse ignition evaluates pressure changes in the combustion chamber
DE102006000097A1 (en) * 2005-03-01 2006-09-07 Denso Corp., Kariya Laser ignition system for internal combustion engine is triggered by an electronic control unit
US20060243238A1 (en) * 2005-04-28 2006-11-02 Denso Corporation Laser type engine ignition device
JP2006329186A (en) * 2005-04-28 2006-12-07 Denso Corp Laser ignition device
US20090159031A1 (en) * 2007-12-19 2009-06-25 Friedrich Gruber Laser ignition apparatus
US20120151931A1 (en) * 2010-12-15 2012-06-21 The Board Of Trustees Of The Leland Stanford Junior University Distributed Ignition Of Fuels Using Nanoparticles

Also Published As

Publication number Publication date
GB201411019D0 (en) 2014-08-06

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)