GB2289549A - Fuel injection device for an internal combustion engine - Google Patents

Fuel injection device for an internal combustion engine Download PDF

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Publication number
GB2289549A
GB2289549A GB9509713A GB9509713A GB2289549A GB 2289549 A GB2289549 A GB 2289549A GB 9509713 A GB9509713 A GB 9509713A GB 9509713 A GB9509713 A GB 9509713A GB 2289549 A GB2289549 A GB 2289549A
Authority
GB
United Kingdom
Prior art keywords
governor
spring
injection device
lever
speed
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
GB9509713A
Other versions
GB9509713D0 (en
GB2289549B (en
Inventor
Reinhard Rechberg
Werner Lemme
Hartmut Sieverding
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.)
Kloeckner Humboldt Deutz AG
Original Assignee
Kloeckner Humboldt Deutz AG
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 Kloeckner Humboldt Deutz AG filed Critical Kloeckner Humboldt Deutz AG
Publication of GB9509713D0 publication Critical patent/GB9509713D0/en
Publication of GB2289549A publication Critical patent/GB2289549A/en
Application granted granted Critical
Publication of GB2289549B publication Critical patent/GB2289549B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D1/00—Controlling fuel-injection pumps, e.g. of high pressure injection type
    • F02D1/02—Controlling fuel-injection pumps, e.g. of high pressure injection type not restricted to adjustment of injection timing, e.g. varying amount of fuel delivered
    • F02D1/08—Transmission of control impulse to pump control, e.g. with power drive or power assistance
    • F02D1/10—Transmission of control impulse to pump control, e.g. with power drive or power assistance mechanical
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D1/00—Controlling fuel-injection pumps, e.g. of high pressure injection type
    • F02D1/02—Controlling fuel-injection pumps, e.g. of high pressure injection type not restricted to adjustment of injection timing, e.g. varying amount of fuel delivered
    • F02D1/04—Controlling fuel-injection pumps, e.g. of high pressure injection type not restricted to adjustment of injection timing, e.g. varying amount of fuel delivered by mechanical means dependent on engine speed, e.g. using centrifugal governors
    • F02D1/045—Controlling fuel-injection pumps, e.g. of high pressure injection type not restricted to adjustment of injection timing, e.g. varying amount of fuel delivered by mechanical means dependent on engine speed, e.g. using centrifugal governors characterised by arrangement of springs or weights
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D1/00—Controlling fuel-injection pumps, e.g. of high pressure injection type
    • F02D2001/0005—Details, component parts or accessories of centrifugal governors
    • F02D2001/002—Arrangement of governor springs

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • High-Pressure Fuel Injection Pump Control (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

An injection device for an internal combustion engine solves the problem of selling approximately uniform power factors at different speeds by connecting a governor spring (10) in series with a governor control spring (11) of different stiffness so that, at a lower speed, the governor spring (10) and the governor control spring (11) operate in series, while at an upper speed, only one of the two springs is in operation with the other spring being disconnected or acting against an abutment. The springs (10, 11) are arranged between a speed-adjusting lever (12) and a compensating lever (9) acting on governor lever (5). Control spring (11) is a compression spring fitted on an adjusting screw (15) and is less stiff than governor spring (10). <IMAGE>

Description

An iniection device for an internal combustion engine The invention relates to an injection device for an internal combustion engine, comprising a centrifugal speed governor which, via at least one adjusting lever, acts on a governor rod and on injection-pump elements adjustable thereby, the adjustment of the lever by the centrifugal speed governor being influenced by a compensating lever against the force of a governor spring.
An injection device of this kind is known from DE-OS 37 33 159. The injection device described in this document comprises a centrifugal speed governor which, via an adjusting lever, acts on the governor rod for adjusting the delivery rate of the injection-pump elements. The adjustment is additionally influenced by a governor spring which acts on the adjusting lever via a compensating lever.
The governor spring is secured to a speed-adjusting lever which is of use for influencing the prestress of the governor spring.
The aim of the present invention is to provide an injection device which has an approximately uniform power factor at two different speeds, and this is achieved in an injection device having the features of claim 1.
A substantially uniform power factor at different speeds is desirable e.g. in the case of "double- frequency" generating sets operated at 50 or 60 Hz. These different frequencies result in different speeds at which the engine driving the generator has to be operated, e.g. 1500 rpm for 50 Hz and 1800 rpm for 60 Hz.
If a power factor of 4 to 5% is set on a conventional injection device or the corresponding speed governor, the power factor at 1800 rpm will be 2.8 to 3.5%. However, a power factor as small as this (less than 3.5%) will result in unstable regulation, whereas an excessively large power factor (above 5a) is prohibited by DIN. This problem of setting approximately uniform power factors at different speeds is solved, according to the invention, by connecting a governor spring in series with a governor control spring.
At the lower set speed, the governor spring and the governor control spring operate in series, whereas at the higher speed only one of the two springs is in operation, since the governor spring differs in stiffness from the governor control spring and one of the two springs is disconnected or acts against an abutment.
According to a development of the invention, the governor control spring is less stiff than the governor spring. According to another preferred feature, the governor control spring is a pressure spring. As a result of this construction the governor control spring, which is less stiff, can be actuated against an exactly defined abutment, determined by the closeness of the individual turns of the spring.
According to another embodiment of the invention, the governor control spring is slid over an adjusting screw and the screw is connected to the governor spring in such a manner that one end of the governor control spring abuts the head of the adjusting screw and the opposite end abuts a speed-adjusting lever. This ensures that, when the thus-equipped internal combustion engine is operating e.g.
at a speed of 1500 rpm, the two springs together determine the stiffness of the total system, whereas when the speed increases, the governor control spring is compressed until its turns are adjacent one another, with the result that the power factor is determined solely by the stiffness of the governor spring. An adjusting screw, over which the governor control spring is slid, can be used to adjust the governor-control spring stop, so that the range of action of the two springs is adjustable in dependence on the speed.
Advantageous other features of the invention are described in detail below with reference to an embodiment of the invention which is shown by way of example in the accompanying drawing.
The single figure of the drawing shows the speed governor of an injection device. A governor rod 1, via levers, actuates elements for adjusting the delivery rate of individual injection pumps. These levers of the individual injection pumps engage in recesses 2a, 2b in the governor rod. The invention is not restricted to actuation of two injection pump elements; any number of injection pump elements can be controlled by the device according to the invention. As long as the adjusting levers 4, 5 are not acting on the governor rod 1, a booster spring 3 moves the governor rod 1 into a maximum delivery position I corresponding to the amount of fuel for starting. The stopping lever 4 and the adjusting lever 5 act on the end of the governor rod 1.The force exerted by levers 4 and 5 for adjusting the governor rod 1 is always a compressive force, acting in opposition to the direction of action of the booster spring 3. The stopping lever 4 can stop the engine by overriding the adjusting lever 5 and pushing the governor rod 1 up to the stop position II. The end of the adjusting lever 5 opposite the governor rod 1 is pivoted in a bearing 6 secured to the casing. A centrifugal speed governor 7 acts on the adjusting lever 5 and adjusts the position of the governor rod 1 down to final stoppage, depending on the speed of the engine, the centrifugal speed governor being driven by the engine camshaft 8.
The adjusting lever 5 is acted upon by an additional compensating lever 9, one end of which is likewise pivoted for movement in the bearing 6 secured to the casing. The free end of the lever 9 acts on the adjusting lever 5 via a governor spring 10, a governor control spring 11 in series therewith, and stops 13, 14 for limiting the adjustment range of the speed-adjusting lever 12. The governor spring 10 is a tension spring, one end of which is held in an opening in the compensating lever 9 and the opposite end of which is held in an opening in an adjusting screw 15. The governor control spring 11 (a compression spring) is slid over the adjusting screw 15 and has one end abutting the head of the adjusting screw 15, while its opposite end abuts a collar on the speed-adjusting lever.
The screw 15 can be adjusted by varying its length, thus varying the prestress of springs 10 and 11. The stiffness of the springs is chosen so that the governor control spring 11 is less stiff than the governor spring 10.

Claims (6)

1. An injection device for an internal combustion engine, comprising a speed governor which, via at least one adjusting lever, acts on a governor rod and on injection-pump elements adjustable thereby, the adjustment of the lever by the centrifugal speed governor being influenced by a compensating lever against the force of a governor spring, in which a governor control spring is connected in series with the governor spring, the two springs being of different stiffness from each other.
2. An injection device according to claim 1, in which the governor control spring is less stiff than the governor spring.
3. An injection device according to claim 1 or claim 2, in which the governor control spring is a pressure spring.
4. An injection device according to any preceding claim, in which the governor control spring is slid over an adjusting screw with one end of the said spring abutting the head of the adjusting screw and its opposite end abutting a speed-adjusting lever.
5. An injection device according to claim 1 substantially as described herein with reference to the accompanying drawing.
6. An internal combustion engine having an injection device as claimed in any preceding claim.
GB9509713A 1994-05-17 1995-05-12 An injection device for an internal combustion engine Expired - Fee Related GB2289549B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19949408125 DE9408125U1 (en) 1994-05-17 1994-05-17 Injection device for an internal combustion engine

Publications (3)

Publication Number Publication Date
GB9509713D0 GB9509713D0 (en) 1995-07-05
GB2289549A true GB2289549A (en) 1995-11-22
GB2289549B GB2289549B (en) 1998-07-08

Family

ID=6908751

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9509713A Expired - Fee Related GB2289549B (en) 1994-05-17 1995-05-12 An injection device for an internal combustion engine

Country Status (3)

Country Link
DE (1) DE9408125U1 (en)
FR (1) FR2720112B1 (en)
GB (1) GB2289549B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10146613A1 (en) * 2001-09-21 2003-04-10 Deutz Ag Fuel injection device for IC engine, has start spring and auxiliary magnetic coupling between setting lever and regulating rod

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2069722A (en) * 1980-02-16 1981-08-26 Lucas Industries Ltd Fuel injection pumping apparatus
US4305363A (en) * 1978-10-11 1981-12-15 Diesel Kiki Co., Ltd. Centrifugal governor
GB2095424A (en) * 1981-03-21 1982-09-29 Bosch Gmbh Robert Centrifugal speed governor for internal combustion engines
GB2154338A (en) * 1984-02-16 1985-09-04 Bosch Gmbh Robert Speed governor for fuel injection pumps
US4649879A (en) * 1984-06-30 1987-03-17 Robert Bosch Gmbh RPM governor for fuel injection pumps
EP0297267A1 (en) * 1987-06-27 1989-01-04 Robert Bosch Gmbh Speed controlling device for fuel-injection pumps

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0544496A (en) * 1991-08-13 1993-02-23 Kubota Corp Governor spring device of centrifugal governor for engine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4305363A (en) * 1978-10-11 1981-12-15 Diesel Kiki Co., Ltd. Centrifugal governor
GB2069722A (en) * 1980-02-16 1981-08-26 Lucas Industries Ltd Fuel injection pumping apparatus
GB2095424A (en) * 1981-03-21 1982-09-29 Bosch Gmbh Robert Centrifugal speed governor for internal combustion engines
GB2154338A (en) * 1984-02-16 1985-09-04 Bosch Gmbh Robert Speed governor for fuel injection pumps
US4649879A (en) * 1984-06-30 1987-03-17 Robert Bosch Gmbh RPM governor for fuel injection pumps
EP0297267A1 (en) * 1987-06-27 1989-01-04 Robert Bosch Gmbh Speed controlling device for fuel-injection pumps

Also Published As

Publication number Publication date
GB9509713D0 (en) 1995-07-05
FR2720112B1 (en) 1998-07-10
GB2289549B (en) 1998-07-08
DE9408125U1 (en) 1994-07-21
FR2720112A1 (en) 1995-11-24

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20090512