US3537435A - Fuel ignition device - Google Patents

Fuel ignition device Download PDF

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Publication number
US3537435A
US3537435A US766178A US3537435DA US3537435A US 3537435 A US3537435 A US 3537435A US 766178 A US766178 A US 766178A US 3537435D A US3537435D A US 3537435DA US 3537435 A US3537435 A US 3537435A
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US
United States
Prior art keywords
fuel
aperture
passage
inlet
glow plug
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.)
Expired - Lifetime
Application number
US766178A
Other languages
English (en)
Inventor
Otto Beesch
Karl Wolf
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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
Priority claimed from DE19671576652 external-priority patent/DE1576652A1/de
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Application granted granted Critical
Publication of US3537435A publication Critical patent/US3537435A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N19/00—Starting aids for combustion engines, not otherwise provided for
    • F02N19/02—Aiding engine start by thermal means, e.g. using lighted wicks
    • F02N19/04—Aiding engine start by thermal means, e.g. using lighted wicks by heating of fluids used in engines
    • F02N19/06—Aiding engine start by thermal means, e.g. using lighted wicks by heating of fluids used in engines by heating of combustion-air by flame generating means, e.g. flame glow-plugs
    • 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

Definitions

  • a glow plug has a housing provided with a fuel passage and a fuel inlet. Removably arranged in the fuel inlet is an adjustable throttling device consisting of two members one of which closes the inlet and is provided with an axial bore for incoming fuel. A radial bore communicates with the axial bore as well as with the fuel passage of the housing.
  • Another member is telescoped into the axial bore downstream of the place where the radial bore communicates therewith and the effective cross section of the radial bore may be varied by sliding the two members relative to one another so that the radial bore is partly covered by an edge of the other member.
  • Other embodiments are also described in the disclosure.
  • the present invention relates to a fuel-ignition device, and particularly to a glow plug for use with diesel engines and the like. Still more particularly the invention relates to a throttling means which is used in conjunction with such a glow plug.
  • glow plugs are conventionally provided with'dosing or throttling devices inserted in the inlet or passage for the fuel and consisting of a sleeve and a cylindrical needle received with clearance in the sleeve so that the gap resulting from such clearance determines the quantity of fuel which may pass through the throttling device.
  • throttling devices inserted in the inlet or passage for the fuel and consisting of a sleeve and a cylindrical needle received with clearance in the sleeve so that the gap resulting from such clearance determines the quantity of fuel which may pass through the throttling device.
  • contaminants in the fuel including water contained therein, tend to clog the narrow gap between the needle and the inner surface of the sleeve, an occurrence which is quite frequent and which has not yet been possible to overcome.
  • an object of the present invention to provide in a fuel-ignition device of the type in question an adjustable throttling means with which the throughput of fuel may be precisely adjusted but which is not subject to clogging.
  • An additional object of the invention is to provide a device of the type in question which is simple and economical in its construction, and which requires no or little precision machining and finishing by contrast with the devices known heretofore.
  • a fuel-ignition device particularly a glow plug of the type used in diesel engines and related applications, wherein a housing is provided with a passage for combustible fuel and with an inlet which communicates with this passage.
  • Fuel-igniting means is arranged in the housing and serves to ignite fuel which is admitted into the passage through the inlet,
  • the device further comprises adjustable throttling means for controlling the entry of fuel into the passage and this throttling means comprises a pair of telescoped memberswhich are received in the inlet closing the same.
  • One of these members is tubular and is provided with a radial aperture arranged to receive incoming fuel and communicating with the passage.
  • the members are slidable with reference to one another between a plurality of positions in which the other member covers the aperture to different extents and thereby varies the effective cross section of the aperture for controlling the flow of fuel therethrough and into the passage of the housing.
  • FIG. 1 is an axial section through a device according to the present invention illustrating the invention in one embodiment
  • FIG. 2 is an enlarged fragmentary view illustrating our adjustable throttling means in another embodiment.
  • FIG. 1 of the drawing it is pointed out that we have illustrated this embodiment in conjunction with a glow plug for use with a diesel engine. How the glow plug operates is well known, just as it is well known how it cooperates with the diesel engine so that the latter is not illustrated. For the purposes of the present invention this is not believed necessary.
  • the glow plug comprises a housing 10 of generally cylindrical configuration having an axial aperture in which there is received a glow pin 11 constituting the fuel-igniting means of the glow plug.
  • the housing 10 further includes a fuel inlet nipple 12 which is carried by the housing 10 and whose inlet passage for the fuel communicates radially with the fuel passage in the housing 10.
  • the fuel inlet nipple 12 which will receive fuel in known manner from a nonillustrated source, may be removably connected with the remainder of the housing 10.
  • the fuel passage in the housing 10 in which the glow pin ll is located is identified with reference numeral 100.
  • adjustable throttling means is provided in the nipple 12.
  • this throttling means consists of a tubular sleeve 13 provided with a radial aperture or bore 14 which communicates with the interior of the sleeve 13 as well as with the fuel inlet passage of the nipple 12 which constitutes a part of the fuel passage 100.
  • a cylinder 15 is received in the forward end of the sleeve 13, and it closes this forward end.
  • the piston member 15 is in the illustrated embodiment press fitted, but it will be appreciated that other approaches are feasible.
  • the member 13 with the member 15 introduced thereinto is maintained in predetermined position with the inlet passage of the nipple 12 by an externally screw-threaded member 16 which is threaded into the fuel inlet passage of the nipple 12 and which is provided with an axial bore communicating with the interior of the sleeve 13.
  • a fuel filter 17 of known type is received in the axial bore 160 of the member 16, for instance by being press fitted therein.
  • the interior of the fuel inlet passage of the nipple 12 is provided with a circumferential shoulder 12a and the member 16 serves to press the sleeve 13 into abutment with the shoulder 120, thus preventing intrusion of fuel into the passage 10a in any manner other than through the radial aperture or bore 14.
  • the effective cross section of the aperture 14 can be varied at will by sliding the member 15 between a plurality of positions in each of which it may close the aperture 14 to a different extent.
  • the edge of the member 15 facing the aperture 14 may overlie the inner side of the aperture 14 to different extents whereby the effective cross section of the aperture 14, that is the exposed cross section which determines the passage of fuel as opposed to the cross section of the aperture 14 in unobstructed or uncovered condition, is varied.
  • FIG. 2 In the embodiment of FlG. 2 we have omitted elements which are not essential to an understanding of this embodiment.
  • the embodiment of FIG. 2 may be simply substituted for the throttling means illustrated in FIG. 1 and all other elements may be the same as those shown in FIG. 1.
  • This having been pointed out an examination of FIG. 2 indicates that this embodiment differs from the embodiment of the throttling means in FIG. 1 in that the piston member is replaced with a cap member 21.
  • the radial aperture or bore of FIG. 2 which corresponds. to the aperture 14 in FIG. 1, is provided not in the sleeve member 19 which corresponds to the sleeve member 13 of FIG. 1, but rather in the circumferential wall of the cap member 21.
  • a glow plug for use with diesel engines and the like comprising housing means provided with a passage for combustible fuel and having an inlet communicating with said passage; a glow pin in said passage for igniting fuel which is admitted into the same; and throttling means for controlling the entry of fuel into said passage, said throttling means comprising a pair of telescoped members received in said inlet closing the same.
  • one of said members being tubular and provided with a radial aperture arranged to receive incoming fuel and communicating with said passage, and said members being stationarily positionable in a plurality of relative positions in which the other of said members covers said aperture to different ex tents, whereby the effective cross section of the aperture and the flow of fuel therethrough and into said passage are functions of the relative positions of said member.
  • a glow plug as defined in claim 1 said aperture having a cross-sectional area in excess of that required for the maximum permissible flow of fuel therethrough.
  • said housing means including a fuel-inlet nipple provided with an inlet passage having said inlet, and said throttling means being removably received in said inlet passage of said fuel-inlet nipple.
  • a glow plug as defined in claim 2 and further comprising fuel filter means arranged in said one member upstream of said radial bore for filtering the fuel prior to entry of the same into said radial bore.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
US766178A 1967-10-19 1968-10-09 Fuel ignition device Expired - Lifetime US3537435A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19671576652 DE1576652A1 (enrdf_load_stackoverflow) 1967-10-19 1967-10-19

Publications (1)

Publication Number Publication Date
US3537435A true US3537435A (en) 1970-11-03

Family

ID=5678883

Family Applications (1)

Application Number Title Priority Date Filing Date
US766178A Expired - Lifetime US3537435A (en) 1967-10-19 1968-10-09 Fuel ignition device

Country Status (3)

Country Link
US (1) US3537435A (enrdf_load_stackoverflow)
FR (1) FR1572939A (enrdf_load_stackoverflow)
GB (1) GB1238517A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5130517A (en) * 1990-03-08 1992-07-14 Mercedes-Benz Ag Flame-type heater plug with two control coils for an air-compression fuel-injection internal-combustion engine
DE4113595A1 (de) * 1991-04-25 1992-10-29 Beru Werk Ruprecht Gmbh Co A Flammgluehvorrichtung

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2131539B (en) * 1982-12-02 1986-04-16 Lucas Ind Plc Electric starting aids for internal combustion engines

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5130517A (en) * 1990-03-08 1992-07-14 Mercedes-Benz Ag Flame-type heater plug with two control coils for an air-compression fuel-injection internal-combustion engine
DE4113595A1 (de) * 1991-04-25 1992-10-29 Beru Werk Ruprecht Gmbh Co A Flammgluehvorrichtung

Also Published As

Publication number Publication date
GB1238517A (enrdf_load_stackoverflow) 1971-07-07
FR1572939A (enrdf_load_stackoverflow) 1969-06-27

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