Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23Q—IGNITION; EXTINGUISHING-DEVICES
  • F23Q7/00—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs
  • F23Q7/22—Details
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23Q—IGNITION; EXTINGUISHING-DEVICES
  • F23Q7/00—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs
  • F23Q7/001—Glowing plugs for internal-combustion engines
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
  • F01P7/00—Controlling of coolant flow
  • F01P7/14—Controlling of coolant flow the coolant being liquid
  • F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
  • F01P7/165—Controlling of coolant flow the coolant being liquid by thermostatic control characterised by systems with two or more loops
• • 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
  • F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
  • F02B29/04—Cooling of air intake supply
  • F02B29/0406—Layout of the intake air cooling or coolant circuit
  • F02B29/0412—Multiple heat exchangers arranged in parallel or in series
• • 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
  • F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
  • F02B29/04—Cooling of air intake supply
  • F02B29/0406—Layout of the intake air cooling or coolant circuit
  • F02B29/0437—Liquid cooled heat exchangers
  • F02B29/0443—Layout of the coolant or refrigerant circuit
• • 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
  • F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
  • F02B29/04—Cooling of air intake supply
  • F02B29/0493—Controlling the air charge temperature
• • 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
  • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
  • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
  • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
  • F02M26/23—Layout, e.g. schematics
  • F02M26/24—Layout, e.g. schematics with two or more coolers
• • 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
  • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
  • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
  • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
  • F02M26/23—Layout, e.g. schematics
  • F02M26/28—Layout, e.g. schematics with liquid-cooled heat exchangers
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
  • F01P2060/00—Cooling circuits using auxiliaries
  • F01P2060/02—Intercooler
• • 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
  • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
  • F02M26/02—EGR systems specially adapted for supercharged engines
  • F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
  • F02M26/05—High pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust system upstream of the turbine and reintroduced into the intake system downstream of the compressor
• • 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
  • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
  • F02M26/02—EGR systems specially adapted for supercharged engines
  • F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
  • F02M26/06—Low pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust downstream of the turbocharger turbine and reintroduced into the intake system upstream of the compressor
• • 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
  • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
  • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
  • F02M26/14—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system
  • F02M26/15—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system in relation to engine exhaust purifying apparatus
• • 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
  • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
  • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
  • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
  • F02M26/23—Layout, e.g. schematics
  • F02M26/25—Layout, e.g. schematics with coolers having bypasses
• • 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
  • F02P19/00—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition
  • F02P19/02—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs
  • F02P19/028—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs the glow plug being combined with or used as a sensor
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23Q—IGNITION; EXTINGUISHING-DEVICES
  • F23Q7/00—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs
  • F23Q7/001—Glowing plugs for internal-combustion engines
  • F23Q2007/002—Glowing plugs for internal-combustion engines with sensing means
• • 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

• Glow plug body including pressure sensor
• the present invention relates to a glow plug body comprising a pressure sensor.
• a pressure sensor In an internal combustion engine, in particular a diesel engine, it has been noted that knowing the value of the pressure inside a cylinder makes it possible to better control the progress of combustion in this cylinder. This information can in particular be used for regulating the injection of fuel into the cylinder. Knowledge of this pressure thus makes it possible to reduce the polluting emissions of the engine, to increase the efficiency of the engine and therefore to reduce its fuel consumption.
• the integration of a pressure sensor into the glow plug makes it possible to measure this pressure without requiring a specific location at the level of the cylinder head of the engine. This integration is also advantageous because it avoids making an additional bore opening into each cylinder. This avoids sealing problems.
• glow plug head is understood to mean the part of this glow plug which is situated outside the cylinder head, that is to say the end of the glow plug opposite to the heating part of the latter introduced into the combustion chamber.
• Solutions of the prior art propose to have the pressure sensor between, on the one hand the body of the glow plug on which it is supported and on the other hand a nut secured to the upper end of a core which transmits electrical energy to the glow plug's preheating electrode, which extends the finger receiving this electrode into the body and beyond, passing through the sensor.
• a candle of the prior art makes it possible to measure the pressure exerted inside the combustion chamber on the finger of the glow plug.
• the object of the present invention is therefore to provide a glow plug which is less sensitive than the glow plugs of the prior art. comprising a pressure sensor with signals which do not correspond to the pressure prevailing within the combustion chamber.
• a body of a glow plug comprising a pressure sensor, this body having on its outer face on the one hand a thread intended for fixing the body in a corresponding tapping of a motor and on the other hand, a gripping zone, generally of cylindrical shape with a hexagonal section, allowing the gripping of the body for the screwing of the glow plug in the corresponding tapping.
• the outside diameter of the part of the body between the thread and the gripping area is over its entire height with a diameter at least equal to the outside diameter of the threaded part.
• the area between the grip part and the threaded area is always, on the side of the threaded area, of a diameter less than the outside diameter of the thread.
• the diameter of the area adjacent to the threaded area indeed corresponds to the diameter of the thread at the bottom of the thread.
• the modification proposed with respect to the bodies of the prior art allows a significant improvement in the pressure measurement carried out by the pressure sensor associated with the glow plug. Indeed, it has been noticed that among the parasitic signals which disturb the measurement of the pressure in the combustion chamber, some came from the vibration of the head of the glow plug. The improvement in pressure measurement is explained not by the suppression of the vibrations of the spark plug head but by the modification of the natural frequency of the oscillations of this head. In this way, it is possible to "distance" this natural frequency from the bandwidth of the pressure sensor and thus the vibrations of the head of the glow plug no longer interfere with the measurement of the pressure produced by the sensor associated with the candle.
• the part of the body between the thread and the grip zone and adjacent to the thread has for example a diameter substantially equal to the outside diameter of the thread.
• the part of the body of the glow plug between the thread and the gripping zone is connected for example to the gripping zone by a connection zone having a section in the shape of an arc of a circle.
• the part of the body between the thread and the grip area can be attached to the grip area by a frustoconical connection area.
• a body of a glow plug according to the invention is for example made of steel.
• the present invention also relates to a glow plug comprising a pressure sensor, characterized in that it comprises a body as described above.
• the pressure sensor is for example in a housing of the body located substantially at the height of the gripping area.
• the present invention finally relates to an internal combustion engine, in particular a diesel type engine, characterized in that it includes a glow plug as described above.
• This engine comprises for example an engine block and a cylinder head delimiting inside thereof at least one combustion chamber; at least one threaded bore is produced in the cylinder head, and said threaded bore advantageously receives the thread of a glow plug body, the gripping region of this body being disposed outside the cylinder head.
• FIG. 2 shows another glow plug of the prior art in side view
• FIG. 3 is a side view of a glow plug according to the invention
• FIG. 4 is a side view of a variant of embodiment of the spark plug of Figure 3.
• Figure 1 shows in longitudinal section a glow plug of the prior art comprising a pressure sensor so as to be able to measure the pressure in an engine cylinder.
• This glow plug 2 is conventionally mounted in an engine 4, of the diesel type, and more precisely in a cylinder head 6 of this engine. It comprises a body 8, a finger 10, a core 12 and a pressure sensor 14.
• the body 8 is adapted to be fixed to the motor 4 by screwing.
• the cylinder head 6 has a threaded bore passing through it and opening into a combustion chamber of said engine 4.
• the body 8 has meanwhile on its outer surface a thread 16 corresponding to the thread made in the cylinder head 6.
• a thread 16 corresponding to the thread made in the cylinder head 6.
• the body 8 is a tubular steel body inside of which are housed in particular the finger 10 and the core 12.
• the finger 10 projects from the tubular body 8 inside the combustion chamber. It is crimped inside the body 8 and receives a preheating electrode (not shown).
• the core 12 transmits electrical energy to the electrode located in the finger 10 and, therefore, is in contact with this electrode and is secured to the finger 10 which it extends inside the body 8, and to the beyond, its free end allowing its electrical connection to a supply conductor.
• the pressure sensor is a piezoelectric sensor. It comprises a piezoelectric element 18 disposed between two contact elements 20 of electrically conductive material, the sensor itself being electrically isolated from the rest of the spark plug 2 by electrically insulating elements 22.
• the pressure sensor 14 comes to take support by means of a support piece 24 on the body 8. The other face of the sensor bears against a nut 26 secured to the upper end of the core 12.
• the part of the glow plug 2 at which is the pressure sensor 14 and located outside the engine is also called the spark plug head.
• the body 8 has a gripping zone 28 used for mounting / dismounting the spark plug 2 relative to the cylinder head 6.
• this gripping zone 28 is cylindrical with a hexagonal cross section. In this way, using a key, accessing from outside the cylinder head 6, the mounting and dismounting of the glow plug 2 are possible.
• the diameter of this gripping zone 28 is, conventionally, greater than that of the rest of the body 8.
• FIGS. 1 and 2 illustrating a glow plug of the prior art there is between the threaded zone carrying the thread 16, and the area of gripping 28 a narrowing 30 of the outer diameter of the body 8.
• a body 8 of glow plug according to the invention does not include such a shrinking 30.
• the outer diameter of the body 8 remains greater than the outside diameter of the thread 16 over the entire portion located between this thread 16 and the gripping area 28.
• the part of the body 8 located between the thread 16 and the gripping area 28 first presents, on the side of the thread 16, a part 32 whose outside diameter corresponds to the outside diameter of the thread 16.
• This area 32 is connected to the gripping area 28 by an area of increasing diameter thus forming in side view (or in section) a line having a radius of curvature R.
• the threaded zone of the body 8 comprising the thread 16 is connected to the gripping zone 28 by through a tapered area 34.
• this tapered area 34 On the side of the thread 16, this tapered area 34 has an outside diameter corresponding to the outside diameter of the thread 16 while on the side of the gripping area 28, the base of this tapered area 34 has a diameter corresponding to the diameter of the gripping area 28. In the case of a hexagonal gripping area, as shown in the drawing, the distance between two opposite sides of this area is considered as the diameter of the gripping area 28 .
• the modification made to the body 8 of the glow plug makes it possible to very significantly improve the measurement carried out by the pressure sensor 14.
• One of the parasitic noises during the measurement of a pressure by the pressure sensor 14 comes from the vibration of the glow plug head.
• the modification made by the present invention makes it possible, not to suppress parasitic vibrations but makes it possible to modify the natural vibration frequency of the head of the glow plug.
• This modification allows this natural frequency to no longer be in the passband of the pressure sensor 14. As a result, the parasitic signals originating from the vibration of the head of the glow plug no longer disturb the measurements made by the sensor. pressure.
• This new shape of the glow plug body applies both to pressure sensors of the type shown in FIG. 1 by way of nonlimiting example and to other pressure sensors associated with a glow plug. , regardless of how this sensor is mounted on this spark plug.
• the present invention is not limited to the embodiments described above by way of nonlimiting examples. It also relates to all the variant embodiments within the reach of those skilled in the art.

Landscapes

• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Thermal Sciences (AREA)
• Measuring Fluid Pressure (AREA)
• Combined Controls Of Internal Combustion Engines (AREA)
• Spark Plugs (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=34945453

Family Applications (1)

Country Status (7)

Cited By (1)

Families Citing this family (4)

Family Cites Families (22)

• 2004
  • 2004-04-27 FR FR0404462A patent/FR2869390B1/fr not_active Expired - Fee Related
• 2005
  • 2005-04-19 JP JP2007510065A patent/JP4662980B2/ja not_active Expired - Fee Related
  • 2005-04-19 EP EP05758255A patent/EP1747407A1/de not_active Withdrawn
  • 2005-04-19 US US11/587,658 patent/US7765974B2/en not_active Expired - Fee Related
  • 2005-04-19 CN CNB2005800131350A patent/CN100545515C/zh not_active Expired - Fee Related
  • 2005-04-19 WO PCT/FR2005/000931 patent/WO2005111505A1/fr active Application Filing
• 2006
  • 2006-11-27 KR KR1020067024847A patent/KR101218081B1/ko active IP Right Grant

Non-Patent Citations (1)

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