GB2153908A - Clamping fuel injectors on I.C. engines - Google Patents

Clamping fuel injectors on I.C. engines Download PDF

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Publication number
GB2153908A
GB2153908A GB08431885A GB8431885A GB2153908A GB 2153908 A GB2153908 A GB 2153908A GB 08431885 A GB08431885 A GB 08431885A GB 8431885 A GB8431885 A GB 8431885A GB 2153908 A GB2153908 A GB 2153908A
Authority
GB
United Kingdom
Prior art keywords
nozzle
cylinder head
bore
engine
elongated member
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.)
Granted
Application number
GB08431885A
Other versions
GB8431885D0 (en
GB2153908B (en
Inventor
David John Gaskell
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.)
ZF International UK Ltd
Original Assignee
Lucas Industries Ltd
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 Lucas Industries Ltd filed Critical Lucas Industries Ltd
Publication of GB8431885D0 publication Critical patent/GB8431885D0/en
Publication of GB2153908A publication Critical patent/GB2153908A/en
Application granted granted Critical
Publication of GB2153908B publication Critical patent/GB2153908B/en
Expired 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
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors

Abstract

An elongated member 14 which intermediate its ends engages the injector 12 is engaged by a nut 18 at one end. The other end of the member 14 is located beneath a surface 19 defined on a part 23 integral with the cylinder head. As the nut 18 is tightened on a stud 17 a clamping force is applied to the nozzle. <IMAGE>

Description

SPECIFICATION Internal combustion engine This invention relates to internal combustion engines and in particular to a clamping arrangement whereby a fuel injection nozzle can be retained within a bore in a cylinder head of the engine.
It is known to provide a screw threaded bore in the cylinder head of an engine to receive a fuel injection nozzle, the nozzle having a complementary screw thread. Such an arrangement is only practical when the outlet orifice of the nozzle is disposed on and extends along the longitudinal axis of the nozzle since in this case the final angular position of the nozzle within the bore does not matter. In cases where the final angular setting of the nozzle within the bore is important it is the practice to use a clamp and one form of clamp is shown in British Published Application 2100334A. The clamp comprises an elongated member which is apertured intermediate its ends to receive the body of the injection nozzle and is shaped to define surfaces which engage surfaces on the body of the nozzle.The elongated member is also provided with apertures adjacent its ends respectively to receive bolts or studs which are engaged within threaded bores in the cylinder head. Another form of clamp comprises an elongated member which is forked at one end for engagement with the nozzle body. Intermediate its ends the member is provided with an aperture to receive a retaining bolt engaged in a bore in the cylinder head and its other end is engaged with a projection or the like on the cylinder head. The second form of clamp only requires one threaded hole in the cylinder and only one bolt but the clamping force which can be applied to the nozzle body is less for the same size of bolt or stud, than can be achieved with the first form of clamp.
The object of the present invention is to provide an internal combustion engine in a simple and convenient form.
According to the invention an internal combustion engine comprises a cylinder head, a bore formed in the cylinder head to receive an injection nozzle, an elongated member shaped intermediate its ends to engage a nozzle located in said bore, means engageable with one end of said elongated member to generate a clamping force on a nozzle located in said bore, and a surface defined on a part integrally formed with the cylinder head of the engine and engageable with the opposite end of the elongated member.
An example of an internal combustion engine in accordance with the invention will now be described with reference to the accompanying drawing in which the single view is a part sectional side elevation of a portion of the cylinder head of an engine showing an injection nozzle clamped in position.
Referring to the drawing a portion of the cylinder head of an internal combustion engine of the compression ignition type, is seen at 10 and formed in the cylinder head is a stepped bore 11 the inner and narrower end of which extends into a combustion chamber of the engine. Mounted in the bore is a fuel injection nozzle 1 2 the narrower end of which extends into the combustion chamber. A sealing washer 1 3 is provided to assure a gas tight seal between the nozzle 1 2 and the step defined in the bore.
In order to clamp the nozzle within the bore a clamping member 14 of elongated form is provided and at a position substantially midway between the ends of the clamping member an aperture is formed therein and through which in use, extends a portion of the body of the injection nozzle. The body of the nozzle defines a surface 1 5 against which can engage shaped projections 1 6 formed on the clamping member 14, the projections defining convex surfaces presented to the surface 1 5.
Adjacent one end of the clamping member there is formed an aperture through which in use, extends a retaining bolt or stud 17, this being secured within a threaded bore formed in the cylinder head. The stud is engaged by a nut 1 8 which can be tightened to generate a clamping force which is applied to the nozzle body. The opposite end of the clamping member engages beneath a surface 1 9 which is defined on a part 20 which is integrally formed with the cylinder head of the engine.
The surface 1 9 forms a reaction surface so that as the nut 1 8 is tightened a clamping force is applied to the nozzle.
The part 20 is readily formed during the manufacture of the cylinder head of the engine and the provision of the part 20 reduces considerably the cost of manufacturing the cylinder head as compared with the construction shown in Published Application 2100334A. Firstly only one screw threaded bore has to be formed to receive the stud 1 7 and secondly where two threaded bores are provided, the alignment of the threaded bores together with the bore in which the nozzle is located, has to be accurately controlled. Moreover, depending on the lever ratio, for a given stress in the stud the clamping force applied to the nozzle is higher than in the single bolt or stud arrangement described in the second paragraph of the specification.
1. An internal combustion engine comprising a cylinder head, a bore formed in the cylinder head to receive an injection nozzle, an elongated member shaped intermediate its ends to engage a nozzle located in the bore, means engageable with one end of said elongated member to generate a clamping force on a nozzle located in said bore, and a surface
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (3)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Internal combustion engine This invention relates to internal combustion engines and in particular to a clamping arrangement whereby a fuel injection nozzle can be retained within a bore in a cylinder head of the engine. It is known to provide a screw threaded bore in the cylinder head of an engine to receive a fuel injection nozzle, the nozzle having a complementary screw thread. Such an arrangement is only practical when the outlet orifice of the nozzle is disposed on and extends along the longitudinal axis of the nozzle since in this case the final angular position of the nozzle within the bore does not matter. In cases where the final angular setting of the nozzle within the bore is important it is the practice to use a clamp and one form of clamp is shown in British Published Application 2100334A. The clamp comprises an elongated member which is apertured intermediate its ends to receive the body of the injection nozzle and is shaped to define surfaces which engage surfaces on the body of the nozzle.The elongated member is also provided with apertures adjacent its ends respectively to receive bolts or studs which are engaged within threaded bores in the cylinder head. Another form of clamp comprises an elongated member which is forked at one end for engagement with the nozzle body. Intermediate its ends the member is provided with an aperture to receive a retaining bolt engaged in a bore in the cylinder head and its other end is engaged with a projection or the like on the cylinder head. The second form of clamp only requires one threaded hole in the cylinder and only one bolt but the clamping force which can be applied to the nozzle body is less for the same size of bolt or stud, than can be achieved with the first form of clamp. The object of the present invention is to provide an internal combustion engine in a simple and convenient form. According to the invention an internal combustion engine comprises a cylinder head, a bore formed in the cylinder head to receive an injection nozzle, an elongated member shaped intermediate its ends to engage a nozzle located in said bore, means engageable with one end of said elongated member to generate a clamping force on a nozzle located in said bore, and a surface defined on a part integrally formed with the cylinder head of the engine and engageable with the opposite end of the elongated member. An example of an internal combustion engine in accordance with the invention will now be described with reference to the accompanying drawing in which the single view is a part sectional side elevation of a portion of the cylinder head of an engine showing an injection nozzle clamped in position. Referring to the drawing a portion of the cylinder head of an internal combustion engine of the compression ignition type, is seen at 10 and formed in the cylinder head is a stepped bore 11 the inner and narrower end of which extends into a combustion chamber of the engine. Mounted in the bore is a fuel injection nozzle 1 2 the narrower end of which extends into the combustion chamber. A sealing washer 1 3 is provided to assure a gas tight seal between the nozzle 1 2 and the step defined in the bore. In order to clamp the nozzle within the bore a clamping member 14 of elongated form is provided and at a position substantially midway between the ends of the clamping member an aperture is formed therein and through which in use, extends a portion of the body of the injection nozzle. The body of the nozzle defines a surface 1 5 against which can engage shaped projections 1 6 formed on the clamping member 14, the projections defining convex surfaces presented to the surface 1 5. Adjacent one end of the clamping member there is formed an aperture through which in use, extends a retaining bolt or stud 17, this being secured within a threaded bore formed in the cylinder head. The stud is engaged by a nut 1 8 which can be tightened to generate a clamping force which is applied to the nozzle body. The opposite end of the clamping member engages beneath a surface 1 9 which is defined on a part 20 which is integrally formed with the cylinder head of the engine. The surface 1 9 forms a reaction surface so that as the nut 1 8 is tightened a clamping force is applied to the nozzle. The part 20 is readily formed during the manufacture of the cylinder head of the engine and the provision of the part 20 reduces considerably the cost of manufacturing the cylinder head as compared with the construction shown in Published Application 2100334A. Firstly only one screw threaded bore has to be formed to receive the stud 1 7 and secondly where two threaded bores are provided, the alignment of the threaded bores together with the bore in which the nozzle is located, has to be accurately controlled. Moreover, depending on the lever ratio, for a given stress in the stud the clamping force applied to the nozzle is higher than in the single bolt or stud arrangement described in the second paragraph of the specification. CLAIMS
1. An internal combustion engine comprising a cylinder head, a bore formed in the cylinder head to receive an injection nozzle, an elongated member shaped intermediate its ends to engage a nozzle located in the bore, means engageable with one end of said elongated member to generate a clamping force on a nozzle located in said bore, and a surface defined on a part integrally formed with the cylinder head and engageable with the opposite end of the elongated member.
2. An engine according to Claim 1 in which said elongated member defines projections having convex surfaces for engagement with the nozzle.
3. An internal combustion engine substantially as hereinbefore described with reference to the accompanying drawing.
GB08431885A 1984-02-04 1984-12-18 Clamping fuel injectors on i.c.engines Expired GB2153908B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB848402997A GB8402997D0 (en) 1984-02-04 1984-02-04 Ic engine

Publications (3)

Publication Number Publication Date
GB8431885D0 GB8431885D0 (en) 1985-01-30
GB2153908A true GB2153908A (en) 1985-08-29
GB2153908B GB2153908B (en) 1987-06-17

Family

ID=10556094

Family Applications (2)

Application Number Title Priority Date Filing Date
GB848402997A Pending GB8402997D0 (en) 1984-02-04 1984-02-04 Ic engine
GB08431885A Expired GB2153908B (en) 1984-02-04 1984-12-18 Clamping fuel injectors on i.c.engines

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB848402997A Pending GB8402997D0 (en) 1984-02-04 1984-02-04 Ic engine

Country Status (1)

Country Link
GB (2) GB8402997D0 (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2670534A1 (en) * 1990-12-12 1992-06-19 Peugeot Device for fixing an injector
EP0627553A1 (en) * 1993-06-03 1994-12-07 Adam Opel Ag Holding device for a fuel injection valve in a diesel engine
EP0671560A1 (en) * 1994-03-12 1995-09-13 Adam Opel Ag Holding device for a fuel injection valve as well as holding device for an individual injection pump acting on that fuel injection valve
US5503128A (en) * 1994-12-28 1996-04-02 Cummins Engine Company, Inc. Distortion control ring for a fuel injector
EP0878622A1 (en) 1997-05-16 1998-11-18 Renault Fixing flange of an injector
GB2337083A (en) * 1998-05-09 1999-11-10 Perkins Engines Co Ltd A fuel injector clamp for an internal combustion engine
WO2004025165A1 (en) * 2002-09-10 2004-03-25 Eaton Fluid Power Gmbh Highly tight connection device
FR2862350A1 (en) * 2003-11-14 2005-05-20 Renault Sas Injection nozzle holder fixing arrangement for motor vehicle, has clamping plate including lever articulated with lever arm that permits to reduce tensile stress, at holder level, to which screw is subjected
EP1746283A1 (en) * 2005-07-19 2007-01-24 Siemens Aktiengesellschaft Verbindung und System
EP1746282A1 (en) * 2005-07-19 2007-01-24 Siemens Aktiengesellschaft Connector and system

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2670534A1 (en) * 1990-12-12 1992-06-19 Peugeot Device for fixing an injector
EP0627553A1 (en) * 1993-06-03 1994-12-07 Adam Opel Ag Holding device for a fuel injection valve in a diesel engine
EP0671560A1 (en) * 1994-03-12 1995-09-13 Adam Opel Ag Holding device for a fuel injection valve as well as holding device for an individual injection pump acting on that fuel injection valve
US5503128A (en) * 1994-12-28 1996-04-02 Cummins Engine Company, Inc. Distortion control ring for a fuel injector
EP0878622A1 (en) 1997-05-16 1998-11-18 Renault Fixing flange of an injector
EP0957263A1 (en) * 1998-05-09 1999-11-17 Perkins Engines Company Limited Injector clamp
GB2337083A (en) * 1998-05-09 1999-11-10 Perkins Engines Co Ltd A fuel injector clamp for an internal combustion engine
US6196194B1 (en) 1998-05-09 2001-03-06 Perkins Engines Company Limited Injector clamp
WO2004025165A1 (en) * 2002-09-10 2004-03-25 Eaton Fluid Power Gmbh Highly tight connection device
CN100392312C (en) * 2002-09-10 2008-06-04 伊顿流体动力有限公司 Highly tight connection device
FR2862350A1 (en) * 2003-11-14 2005-05-20 Renault Sas Injection nozzle holder fixing arrangement for motor vehicle, has clamping plate including lever articulated with lever arm that permits to reduce tensile stress, at holder level, to which screw is subjected
EP1746283A1 (en) * 2005-07-19 2007-01-24 Siemens Aktiengesellschaft Verbindung und System
EP1746282A1 (en) * 2005-07-19 2007-01-24 Siemens Aktiengesellschaft Connector and system

Also Published As

Publication number Publication date
GB8402997D0 (en) 1984-03-07
GB8431885D0 (en) 1985-01-30
GB2153908B (en) 1987-06-17

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PCNP Patent ceased through non-payment of renewal fee