Source: http://www.google.com/patents/US4577601?ie=ISO-8859-1
Timestamp: 2014-03-13 10:38:23
Document Index: 684664515

Matched Legal Cases: ['art 4', 'art 4', 'art 4', 'art 4', 'art 4', 'art 4', 'art 4']

Patent US4577601 - Glow plug arrangement - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsIn a compressed air charged combustion engine, in order to improve the atomization and ignition of the injected fuel from an injection nozzle, a glow plug which extends out of its glow plug housing with a cylindrically formed heating rod is provided with an irregular outer surface in the region which...http://www.google.com/patents/US4577601?utm_source=gb-gplus-sharePatent US4577601 - Glow plug arrangementAdvanced Patent SearchPublication numberUS4577601 APublication typeGrantApplication numberUS 06/571,824Publication dateMar 25, 1986Filing dateJan 18, 1984Priority dateJan 19, 1983Fee statusLapsedAlso published asDE3301559A1, DE3301559C2Publication number06571824, 571824, US 4577601 A, US 4577601A, US-A-4577601, US4577601 A, US4577601AInventorsRoland KlakOriginal AssigneeDaimler-Benz AktiengesellschaftExport CitationBiBTeX, EndNote, RefManPatent Citations (18), Referenced by (5), Classifications (8), Legal Events (6) External Links: USPTO, USPTO Assignment, EspacenetGlow plug arrangementUS 4577601 AAbstract In a compressed air charged combustion engine, in order to improve the atomization and ignition of the injected fuel from an injection nozzle, a glow plug which extends out of its glow plug housing with a cylindrically formed heating rod is provided with an irregular outer surface in the region which is impinged by the stream of fuel. The heating rod exhibits a cylindrical form and is provided with ring grooves to form the irregular surface area. Moreover the fuel stream meets at a sharp angle onto the heating rod.
What is claimed is: 1. Glow plug arrangement for a compressed air charged combustion engine for motor vehicles and the like, comprising:a glow plug housing; and a heating rod extending outwardly of the housing into an engine combustion space in a region intersecting with a fuel stream supplied from an injection nozzle; wherein the heating rod is disposed at a sharp angle to the injected fuel stream and is provided in the region impinged on by the fuel stream with an irregular surface to improve the atomization and ignition of the fuel, said irregular surface being formed as a plurality of ring grooves around the circumference of the heating rod, and wherein said ring grooves include sharp edged outer surface portions. 2. An arrangement according to claim 1, wherein the heating rod is cylindrical in shape and wherein the ring grooves are formed adjacent the free end of the heating rod opposite the glow plug housing.
3. An arrangement according to claim 2, wherein at least four of said ring grooves are provided.
4. Glow plug arrangement for a compressed air charged combustion engine for motor vehicles and the like, comprising:a glow plug housing; and a heating rod extending outwardly of the housing into an engine combustion space in a region intersecting with a fuel stream supplied from an injection nozzle; wherein the heating rod is disposed at a sharp angle to the injected fuel stream and is provided in the region impinged on by the fuel stream with an irregular surface to improve the atomization and ignition of the fuel, said irregular surface being formed as a plurality of ring grooves around the circumference of the heating rod, wherein the heating rod is cylindrical in shape and wherein the ring grooves are formed adjacent the free end of the heating rod opposite the glow plug housing; and wherein the radius of each ring groove is between 0.20 mm and 0.30 mm, wherein the depth of each ring groove is between 0.20 mm and 0.30 mm, wherein the distance between the middle of adjacent ring grooves is between 0.60 mm and 0.90 mm, and wherein between 10 and 20 of said ring grooves are provided. 5. An arrangement according to claim 4, wherein said ring grooves include sharp edged outer surface portions.
BACKGROUND AND SUMMARY OF THE INVENTION The invention relates to a glow plug arrangement for an air charged injection combustion engine.
French Patent (FR-PS) No. 76 30 914 discloses a glow plug for the vaporization and ignition of fluid fuel. The glow plug is provided with a cylindrical, smooth heating rod part which is disposed in the injection region of two fuel streams of an injection nozzle arranged at right angles to the heating rod. Glow plugs of this kind are not suitable to fulfill the efficient intensive atomization and disturbance free ignition of the fuel.
The invention is based upon the problem to achieve improved fuel conditioning and ignition by providing a glow plug arrangement requiring a small construction space and of simplified construction.
The solution of this problem is inventably obtained by providing that the heating rod is disposed at a sharp angle to the injected fuel stream and is provided in the region impinged on by the fuel stream with an irregular surface to improve the atomization and ignition of the fuel, said irregular surface being formed as a plurality of ring grooves around the circumference of the heating rod.
In German published application (DE OS) No. 26 40 314 a glow plug is disclosed with an uneven surface at the free end of the heating rod part. However, in this arrangement the thread formed indentations at the rod part serve as a guide for a resistance heater wire. Because of the rounded outer surface of the heating rod in this arrangement, no splitting up of the fuel into the smallest drops is achieved.
Through the inventive measures, namely to provide the heating rod of the glow plug with sharp edged outer surface parts in the region of the compact impinging fuel stream, the injected fuel from the injection nozzle is so split up that the fuel is divided into many small droplets. Therewith a large fuel outer surface area results which is associated with a good gas mixture with the air to form a readily combustible gas mixture.
BRIEF DESCRIPTION OF THE DRAWINGS The single drawing FIGURE is a part sectional schematic view depicting the injection nozzle and glow plug arrangement for a single combustion engine combustion space constructed in accordance with a preferred embodiment of the invention.
DETAILED DESCRIPTION OF THE DRAWINGS In the single drawing FIGURE there is shown a glow plug 1 arranged for the vaporization and ignition of fluid fuel in a combustion space of a vehicle engine or the like. Glow plug 1 includes a glow plug housing 2 and a heating rod 4 inserted in a longitudinally extending bore 3 of the housing 2, which heating rod protrudes out of the housing 2 with its free rod part 4a disposed at a sharp angle to the fuel injection nozzle 5.
The free rod part 4a is configured with a smooth cylindrical surface over most of its length. However in a region which is impinged by a massive fuel stream from the injection nozzle 5, rod part 4a is provided with special necked rings. In the illustrated embodiment, this region of rod part 4a is provided with four adjacent ring grooves 6 which flay the impinging fuel stream. The ring grooves 6 are so arranged in depth, distance, and shape that an excellent wall strength for maintaining the rigidity of the rod part 4a is assured.
Practical embodiments of the invention include the following dimensions:
radius of ring grooves 6 of 0.20 mm to 0.30 mm, with 0.25 mm being especially preferred;
depth of ring grooves 6 of 0.20 mm to 0.30 mm, with 0.25 mm being especially preferred;
distance between the middle of adjacent ring grooves 6 of 0.60 mm to 0.90 mm, with 0.75 mm being especially preferred; and
number of ring grooves 6 between 10 and 20 with 14 grooves 6 being especially preferred
The ring grooves 6 are preferably manufactured either by cutting or through mechanical deformation of the material forming rod part 4a.
According to especially preferred embodiments of the invention, the insertion of the glow plug 1 with the enlarged surface area rod part 4a is primarily provided for so-called flame start devices, in order at low temperatures to have good starting characteristics as well as a disturbance free warm-up phase of the combustion engine as a result of the pre-warmed combustion air.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS1341478 *Feb 12, 1919May 25, 1920Joseph Reid Gas Engine CompanyInternal-combustion engineUS1421594 *Jun 16, 1920Jul 4, 1922Sletten Anton IversenInternal-combustion engineUS2762348 *Feb 24, 1953Sep 11, 1956Meurer SiegfriedMixing arrangement in internal combustion engineUS4323039 *Jun 3, 1980Apr 6, 1982Yanmar Diesel Engine Co., Ltd.Antechamber system diesel engineUS4345555 *Mar 14, 1980Aug 24, 1982Kabushiki Kaisha Toyota Chuo KenkyushoSelf-heating ignition plugUS4389986 *Jun 17, 1980Jun 28, 1983Kabushiki Kaisha Toyota Chuo KenkyushoDirect injection type internal combustion engine with a low pressure fuel injectorDE395862C *Oct 16, 1922May 19, 1924Bosch Robert AgGluehdrahtzuendkerzeDE1116854B *Jun 24, 1957Nov 9, 1961Guenter Fuchs Dipl IngVerdampfungsoelbrenner *DE1526773A Title not availableDE2042236A1 *Aug 26, 1970Mar 2, 1972 Title not availableDE2640314A1 *Sep 8, 1976Mar 9, 1978Bosch Gmbh RobertGluehkerze fuer brennkraftmaschinen *DE2734662A Title not availableDE2802625A1 *Jan 21, 1978Jul 26, 1979Beru Werk Ruprecht Gmbh Co AGluehkerze *DE7139817U Title not availableFR2368196A1 * Title not availableGB628281A * Title not availableGB1354588A * Title not availableGB2041445A * Title not available* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS5058548 *May 31, 1990Oct 22, 1991Fuji Jukogyo Kabushiki KaishaCombustion chamber of an internal combustion engineUS5329901 *Nov 16, 1990Jul 19, 1994Nippon Clean Engine Research Institute Co., Ltd.Hot surface impact ignition type internal combustion engine and method of hot surface impact ignitionUS7319208 *May 13, 2003Jan 15, 2008Ngk Spark Plug Co., Ltd.Controller and glow plug for controlling energization modesUS7753025 *Apr 11, 2008Jul 13, 2010Southwest Research InstituteSurface ignition mechanism for diesel enginesUS8319153Nov 17, 2008Nov 27, 2012Federal-Mogul Italy Srl.Glow plug with metallic heater probe* Cited by examinerClassifications U.S. Classification123/298, 123/145.00A, 361/266, 431/262, 219/270International ClassificationF23Q7/00Cooperative ClassificationF23Q7/001European ClassificationF23Q7/00BLegal EventsDateCodeEventDescriptionJun 7, 1994FPExpired due to failure to pay maintenance feeEffective date: 19940330Mar 27, 1994LAPSLapse for failure to pay maintenance feesOct 26, 1993REMIMaintenance fee reminder mailedApr 10, 1989FPAYFee paymentYear of fee payment: 4Oct 26, 1984ASAssignmentOwner name: DAIMLER-BENZ AKTIENGESELLSCHAFT STUTTGART, WEST GEFree format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:KLAK, ROLAND;REEL/FRAME:004410/0767Effective date: 19840116Jan 18, 1984ASAssignmentOwner name: DAIMLER-BENZ AKTIENESELLSCHAFT STUTTGART, WEST GEFree format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:KLAK, ROLAND;REEL/FRAME:004394/0589Effective date: 19831227RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google