US3557464A

US3557464A - Fuel injector sleeve cutting guide

Info

Publication number: US3557464A
Application number: US757658A
Authority: US
Inventors: John A Burgess
Original assignee: Individual
Current assignee: Individual
Priority date: 1968-09-05
Filing date: 1968-09-05
Publication date: 1971-01-26
Anticipated expiration: 1988-01-26

Abstract

A GUIDE MEANS FOR USE IN CUTTING FUEL INJECTOR SLEEVES FROM DIESEL ENGINES COMPRISING A GUIDE PLATE WHICH IS SECURED TO THE CYLINDER HEAD BY MEANS OF HEAD BOLTS EXTENDING THROUGH THE CYLINDER HEAD AND BEING THREADABLY RECEIVED BY THE PLATE. A PLURALITY OF SPACED APART STUDS ARE ADJUSTABLY MOUNTED ON THE PLATE AND ARE POSITIONED BELOW THE COPPER INJECTOR SLEEVE IN THE HEAD. THE STUDS ARE ADAPTED TO LIMIT THE DEPTH TO WHICH THE SLEEVE CUTTING TOOL CAN EXTEND INTO THE FUEL INJECTOR OPENING AND ALSO SERVE AS A GUIDE FOR THE SAME.

Description

Jan. 26, 1971 J; A. BURGESS FUEL INJECTOR SLEEVE CUTTING GUIDE Filed- Sept. 5, 1968 Mme/v70? Jo /v ,4 5020555 5y 5 firraP/vy/s United States Patent 3,557,464 FUEL INJECTOR SLEEVE CUTTING GUIDE John A. Burgess, 5645 NW. 1st St., Des Moines, Iowa 50313 Filed Sept. 5, 1968, Ser. No. 757,658 Int. Cl. G01b 3/30 US. Cl. 33-180 6 Claims ABSTRACT OF THE DISCLOSURE A guide means for use in cutting fuel injector sleeves from diesel engines comprising a guide plate which is secured to the cylinder head by means of head bolts extending through the cylinder head and being threadably received by the plate. A plurality of spaced apart studs are adjustably mounted on the plate and are positioned below the copper injector sleeve in the head. The studs are adapted to limit the depth to which the sleeve cutting tool can extend into the fuel injector opening and also serve as a guide for the same.

Conventional diesel engines such as the Cummins V-6 or V-8 engine have copper sleeves embracing the fuel injectors utilized therein. It is also necessary to replace these sleeves for proper engine performance. Heretofore, the'sleeves have been simply cut or bored from their seats in the fuel injector bore by a mechanic operating a rotary cutting tool without any guide means or jig being utilized. Previously, the cylinder head was simply removed from the engine block and placed on a supporting surface such as the ground or the like. The cutting operation was then performed by alternately drilling and inserting a gauge, etc. until the desired cut was accomplished. The tolerances on such a cut are maintained between 0.095 to 0.125 inch.

It is imperative that the proper out be provided so that the proper fuel injection can be accomplished. If the cut is too deep, the fuel injector will extend too far into the cylinder and conversely, the fuel injector will not extend sufficiently into'the cylinder if the cut is too shallow. If the sleeve is not seated correctly, the injector correspondingly is not seated correctly and the spray of fuel into the firing chamber is either against the dome or towards the top of the firing chamber. There must be turbulance in the firing chamber and in either of the extreme conditions mentioned above such turbulance is absent. The second important reason for obtaining a precise boring is to achieve a perfect seal between the injector and the sleeve and between the sleeve and the bore.

Therefore, it is a principal object of this invention to provide a means for cutting fuel injector sleeves from diesel engines.

A further object of this invention is to provide a method for cutting the fuel injector sleeve from diesel engines.

A further object of this invention is to provide a guide plate means which is secured to a diesel engine cylinder head to facilitate the proper cutting of the fuel injector sleeves therefrom.

A further object of this invention is to provide a guide plate means for cutting fuel injector sleeves from diesel engines which limits the depth to which the cutting tool can extend.

A further object of this invention is to provide a guide plate means for use in cutting fuel injector sleeves from diesel engines wherein the plate is secured to the cylinder head by means of the cylinder head bolts.

A further object of this invention is to provide a guide means for use in cutting fuel injector sleeves from 3,557,464 Patented Jan. 26, 1971 diesel engines which is economical of manufacture, durable m use and refined in appearance.

These and other objects will be apparent to those skilled in the art.

This invention consists in the construction, arrangements, and combination of the various parts of the device, whereby the objects contemplated are attained as hereinafter more fully set forth, specifically pointed out in the claims ,and illustrated in the accompanying drawings in which:

FIG. 1 is a partial exploded perspective view of a diesel engine cylinder head and the guide plate of this invention;

FIG. 2 is a partial sectional view of the cylinder head illustrating the relationship between the fuel injector, fuel injector sleeve and the cylinder head;

FIG. 3 is an enlarged sectional view of the guide plate as seen along lines 3--3 of FIG. 1; and

FIG. 4 is a fragmentary sectional view illustrating the guide plate being secured to the cylinder head and illustrating a stud on the guide plate limiting the depth of the cutting tool.

The numeral 10 generally designates the cylinder head assembly for a diesel engine such as a Cummins V6 or V-8. Head assembly 10 includes a head 12 having a plurality of head bolt openings 14 formed therein adapted to receive head bolts 16 extending therethrough which are utilized to mount the head 12 on the engine block (not shown). The particular head 12 shown in FIG. lincludes four

injector bores

18, 20, 22 and 24 formed therein which are adapted to receive

fuel injectors

26, 28, 30 and 32 therein respectively. A copper injector sleeve 34 is mounted in the lower end of each of the

bores

18, 20, 22 and 24 and embraces the lower end of the fuel injectors as illustrated in FIG. 2. Each of the fuel injectors includes an injector link 36, injector spring 38, O-

ring seals

40, 42, 44 and 46 mounted on body portion 48, cup 50, injector cup tip 52, fuel intake means 54 and fuel discharge means 56. The fuel injector 26 is mounted on the head 12 by means of a mounting plate 58 fastened to the head with

bolts

60 and 62. The numeral 64 generally designates a valve assembly which is provided on the head adjacent fuel injector 32. The valve assembly for the

fuel injectors

26, 28 and 30 has not been shown in FIG. 1 for purposes of clarity.

The numeral 66 generally designates the guide plate of this invention and includes a top 68,

opposite ends

70 and 72, and

opposite sides

74 and 76. A pair of

legs

78 and 80 are secured to and extend downwardly from top 68 at

sides

74 and 76 respectively. A plurality of nuts 82 are welded to the top surface of top "68- and register with threaded openings 84 formed in plate 66. In the particular plate 66 shown in FIG. 1, there are 8 nuts 82 mounted on the plate adapted to register with the openings 14 in the head 12. Nuts 82 are preferably of inch S.A.E. high hex construction. In the particular plate 66 illustrated in FIG. 1, four studs 86 are mounted on the plate 66 and have a stop button 88 at their upper ends. Nuts 90 are welded to the bottom surface of top 68 and threadably receive the studs 86 extending therethrough. The studs 86 are positioned on the plate 66 so that the buttons 88 are located directly below the

openings

18, 20, 22 and 24. Preferably, the studs 86 are inch S.A.E. and have a length of 1% inches. The numeral 81 designates two guide posts provided in plate 66 (FIG. 1).

The head 12 illustrated in FIG. 1 is for a V-8 Cummins diesel engine and thus four studs 86 and 10 nuts 82 are required. If the head is for a V-6 engine, Only three studs 86 would be required. Preferably, the top 68 is of steel construction and is 11 inches wide, 30 inches long and inch thick when the plate is used on a V-8 Cummins diesel engine. The

legs

78 and 80 are preferably two inches wide, 30 inches long and We inch thick when the plate is used with the Cummins V-8 engine.

The sleeves 34 are cut from the head 12 in the following manner. The head 12 is removed from the engine block in convential fashion. The plate '66 is positioned below the head 12 and the head bolts 16 are inserted through the openings 14 and are threadably secured to the nuts 82 (FIG. 4). The

fuel injectors

26, 28, 30 and 32 are removed from the head in conventional fashion. It should be noted that the fuel injectors could have been removed from the head 12 prior to the head 12 being secured to the plate 66. The cutting tool which is generally designated by the reference numeral 92 is then inserted into the bore 18 so that the sleeve 34 is cut therefrom. The depth to which the cutting tool 92 can extend into the opening 18 is limited by the stop button 88 on the stud 86 as illustrated in FIG. 4. The lower tip of the cutting tool 92 engages the upper end of the stop button 88 and thus prevents the cutting tool from extending too far into the bore 18. Likewise, the mechanic knows that he must continue to operate the cutting tool until the stop button 88 is encountered by the cutting tool 92. The cutting tool 92 is then removed from the bore 18 and a. new injector sleeve Will be inserted into the bore 18. The cutting operation is then performed in all of the bores which require new sleeves. It should be noted that the cutting depth of the tool 92 can be controlled by the adjustment of the stud 86 with respect to the plate 66. The head bolts 16 securely maintain the plates 66 on the head 12 and precisely position the plate '66 with respect to the head 12. The limiting action of the stop buttons 88 insures that the sleeve 34 will be properly cut from the bore 18 and that the new sleeve will be correctly seated therein. The guide plate of this invention insures that the injector cup tip 52 will extend into the firing chamber of the proper distance and that a proper seat is provided between the fuel injector and the sleeve and between the sleeve and the bore. The guide plate of this invention and the method described herein permits the sleeves to be cut from the cylinder head much more rapidly than was heretofore possible and with a much higher degree of accuracy. Thus it can be seen that the device accomplishes at least all of its stated objectives.

Some changes may be made in the construction and arrangement of my fuel injector sleeve cutting guide and method of using same without departing from the real spirit and purpose of my invention, and it is my intention to cover by my claims, any modified forms of structure or use of mechanical equivalents which may be reasonably included within their scope.

I claim:

1. A guide plate for use in cutting fuel injector sleeves from a diesel engine head assembly, comprising:

a rectangular plate having opposite side edges, opposite ends, and top and bottom surfaces,

first and second legs secured to said opposite side edges respectively and extending downwardly therefrom, said plate having a plurality of spaced apart first openings formed therein adapted to register with at least some of the head bolt openings in said head assembly, first means adapted to extend through said head bolt openings and said first openings to secure said plate to said head assembly, and a plurality of spaced apart stop buttons secured to said plate and being positioned above said top surface,

said stop buttons being positioned directly below the fuel injector bores when said plate is secured to said head assembly whereby said stop buttons will limit the depth to which a sleeve cutting tool can extend through said bores.

2. The structure of claim 1 wherein a plurality of internally threaded nuts are secured to said plate which register with said first openings and wherein said plate is adapted to be secured to said head assembly by a plurality of bolts extending through said head bolt openings and being threadably received by said nuts.

3. The structure of claim 1 wherein four stop buttons are provided on said plate.

4. The structure of claim 1 wherein three stop buttons are provided on said plate.

5. The structure of claim 1 wherein said stop buttons are mounted on the upper ends of threaded studs threadably extending through said plate.

6. The structure of claim 5 wherein the longitudinal axes of said studs are transverse to said top surface and are movably adjustable with respect thereto.

References Cited UNITED STATES PATENTS 1,469,395 10/1923 Richard 33174(G)UX 1,557,882 10/1925 Schade 33174(G) 1,877,477 9/1932 Gladding 33180(AU) 2,270,158 1/1942 Baesgen et al 33174(G) 2,43 6,251 2/ 1948 Dobie et al 29426X 2,594,810 9/1952 Schaub et a1 294'01 2,645,140 7/1953 Meilstrup 33174(G) 2,897,585 8/1959 Bodewein 29401 2,928,296 3/1960 Vavrinek 775 CHARLIE T. MOON, Primary Examiner US. Cl. X.R.