US3791171A - Centrifugal governor particularly for altering the moment of injection start in diesel engines - Google Patents

Centrifugal governor particularly for altering the moment of injection start in diesel engines Download PDF

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Publication number
US3791171A
US3791171A US00269174A US3791171DA US3791171A US 3791171 A US3791171 A US 3791171A US 00269174 A US00269174 A US 00269174A US 3791171D A US3791171D A US 3791171DA US 3791171 A US3791171 A US 3791171A
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United States
Prior art keywords
centrifugal
weight
pin
phase angle
centrifugal weight
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
US00269174A
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English (en)
Inventor
E Hofmann
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
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Robert Bosch GmbH
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Filing date
Publication date
Priority claimed from DE19712135111 external-priority patent/DE2135111C3/de
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
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Publication of US3791171A publication Critical patent/US3791171A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • F02D1/16—Adjustment of injection timing
    • F02D1/162—Adjustment of injection timing by mechanical means dependent on engine speed for angular adjustment of driving and driven shafts
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D13/00—Control of linear speed; Control of angular speed; Control of acceleration or deceleration, e.g. of a prime mover
    • G05D13/08—Control of linear speed; Control of angular speed; Control of acceleration or deceleration, e.g. of a prime mover without auxiliary power
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition

Definitions

  • One terminus of the pin is in continuous engagement with a curved track of a component keyed to the driven shaft for changing the phase angle as the weights swing in response to an rpm change.
  • the other terminus of the pin carries an abutment ring of arbitrary diameter which, after the weight has swung through a predetermined path, engages the bounding edge of a recess provided in a component affixed to the driving shaft to limit the phase angle alteration to'a predetermined, arbitrary value.
  • This invention relates to a centrifugal governor, particularly for altering the starting moment of injection in diesel engines and is of the type that has at least one centrifugal weight which is swung by rpm-dependent centrifugal forces against the force of at least one spring and which, as a function of the extent of its swinging displacement, varies the .phase angle A between axially aligned driving and driven shafts.
  • the centrifugal governor is further of the type that includes a mechanism which sets an arbitrary'limit to the phase angle.
  • the said mechanism is provided with at least one recess, the shape of which limits the displacement of a pin which is an integral part of the centrifugal weight and which projects therebeyond remote from the center of gravity thereof.
  • centrifugal governors of the aforenoted type it is required to limit the phase shift between the axially "aligned driving'and driven shafts to various predetermined phase angles in case, for example, the governors are used in serial engines which are set without other substantial changes to various full load output values by limiting the full load rpm s. To these rpm s there are assigned corresponding phase angles. The most important reason'for providing a limitation to the phase angle, however, is to ensure that when the full-load rpm is reached, the motion of the A -altering mechanism is stopped and A is maintained at that value. If such limitation is absent then the centrifugal governor tends to oscillate in case of torque or rpm fluctuations. Such an oscillation of the governor components generates loud operational noises. Also, the engine runs unevenly and there is experienced a premature wear and breakdown of the governor.
  • centrifugal governors of the aforenoted type such as disclosed, for example, in US. Pat. No. 1,967,445 and German Pat. No. 682,352 which serve for altering the moment of ignition in engines having battery operated ignition systems, the mechanism pro- 2. quirements of inexpensive mass production and renders possible simple and reliable readaptations.
  • the rpmdependent course of the phase angle alteration is controlled in a known manner by means of a guiding track affixed to one of the shafts and further, the recess associated with the arbitrary limitation of the phase angle is arranged separately and spaced from the guiding track in a disc-shaped component affixed to the other shaft.
  • the pin projecting from the centrifugal weight and extending into said recess is provided with an abutment ring which is adapted to engage an inner edge of the recess that is remote from the rotational axis of the vide d with the aforenoted recesses for limiting the phase angle has, at the same time, the function of controlling the rpm-dependent course of the A-change between the driving and the driven shaft. For this reason, the mechanism is fixedly attached tothe driven shaft and transmits the full driving torque. Each recess has to be machined very accurately in order to function properly as a curved guiding track.
  • the outer diameter of the ring carried by the pin is dimensioned in accordance with the desired phase angle limit A,.
  • An only symbolically illustrated fuel injection pump 11 has a cam shaft 10 (driven shaft) on which there is inserted a centrifugal governor, generally indicated at 12.
  • The-centrifugal governor has a hub 13 which serves as the driving shaft for the driven shaft 10 and which is'supported on a terminal shaft portion 14 of the cam shaft 10.
  • the hub 13 is provided with pivots 15 on which there are swingably arranged centrifugal weights 18.
  • a clutch member 22 On an axially forwardly projecting central extension 20 of the driving hub 13 there is supported a clutch member 22 which is provided with jaws 21 and which is connected at its radial face by means of bolts 23 to the driving hub 13.
  • a second clutch mem her (not shown) which surrounds the jaws 21 of the clutch member 22, the centrifugal governor is connected with the driving components of the engine, also not shown.
  • a gear wheel may be used as part of a gearing to serve as the coupling means between the engine and the centrifugal governor 12.
  • Each centrifugal weight 18 has, at a distance from its pivot 15, a pin 25 which extends parallel to and spaced from the governor axis and which projects beyondeither side of the weight 18.
  • One end portion 25a of the pin 25 carries a roller 26 which, in turn, is in engagement with a curved track 27.
  • the latter which serves as a guiding curve, is provided on a lever-shaped transmission member 28 which, in turn, is integral with the cam shaft 10.
  • the roller 26 is secured to the end portion 25a of the pin 25 against axial displacement by means of a retainer ring 29.
  • the other terminal portion 25b of the pin 25 carries an abutment ring 30.
  • each recess 31 is, for manufacturing reasons, expediently of circular configuration as illustrated in FIG. 2; it may, however, have any other shape.
  • the essential characteristic of the recess 31 is that the full swinging movement of the pin portion 25b carrying the abutment ring 30 must not be obstructed.
  • the recess 31 is bounded by an inner edge 33 which the abutment ring 30 is adapted to contact when the weight 18 assumes an outer position.
  • the radial distance A of the governor axis from that location of the inner edge 33 of the recess 31 which is in engagement with the abutment ring 30 when the centrifugal weight 18 is in its outer position, limits the swinging path of the centrifugal weights 18. In this manner the possible change of the phase angle between the driving shaft (that is, the hub 13) and the driven shaft (that is, the cam shaft 10) is also limited.
  • the magnitude of the possible pivotal paths of the centrifugal weight 18 is a function of the outer diameter D of the abutment ring 30.
  • the phase angle may be arbitrarily limited to a changeable value A,.
  • a readaptation of the centrifugal governor may be effected in a very simple manner.
  • the abutment rings 30 may be manufactured, for example, by precision stamping.
  • the centrifugal governor is provided with oil bores 41, 41a, 41b and is surrounded, for'preventing any loss of oil, by means of a housing 42 which is affixed rigidly to the fuel injection pump 1 l.
  • the housing'42 is provided with a sealing ring 43 which isolates the rotary centrifugal governor from the external environment in a fluid-tight manner.
  • the centrifugal forces of the weights l8 generated during the operation of the governor are opposed by compression spring pairs 45 which at one end engage pivotable spring supports 46 and at the other end engage support pins 47 integral with lever 28.
  • the springs 45 urge the associated centrifugal weight 18 inwardly towards its position of rest through the lever 28, the roller 26 and the pin 25.
  • the centrifugal weights 18 move against the force of the springs 45 outwardly in the direction of the arrow 50 and turn the components 28, 10 of the driven side with respect to the components 13, 22 of the driving side until the abutment rings 30 arrive into engagement with the inner edge 33 of the recesses 31.
  • phase angle adjustment of, for example, A, 3, 4, 6 or 7 of the cam shaft of the fuel injection pump.
  • the maximum phase angle A of, for example, 8 is achieved when the centrifugal weights 18 are permitted to execute their greatest possible pivotal motion. This is achieved,
  • phase angle A between the driving shaft and the driven shaft there is achieved, with increasing rpms, a shift of the moment of injection start within the load range towards an earlier moment, while the abutment rings 30, as a function of their outer diameter, limit the phase angle to an arbitrary value A,..
  • a pin affixed to said centrifugal weight, with one end portion thereof extending into said recess, and the other end portion thereof comprising said means for connecting said centrifugal weight with said curved track, said pin moving across said recess towards said edge upon movement of said centrifugal weight in response to an rpm change, and
  • G an abutment ring of predetermined outer diameter secured to said end portion of said pin, said abutment ring arriving into contact with said edge during the course of outward motion of said centrifugal weight in response to an rpm increase, the cooperation between said edge and said abutment ring limiting the change of phase angle to a predeterminedvalue as a function of said outer diameter.
  • said means defining said curved track is formed of a lever rigidly affixed to the second one of said shafts.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • High-Pressure Fuel Injection Pump Control (AREA)
  • Fuel-Injection Apparatus (AREA)
US00269174A 1971-07-14 1972-07-05 Centrifugal governor particularly for altering the moment of injection start in diesel engines Expired - Lifetime US3791171A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712135111 DE2135111C3 (de) 1971-07-14 Fliehkraftversteller, insbesondere zur Änderung des Einspritzzeitpunktes bei Dieselmotoren

Publications (1)

Publication Number Publication Date
US3791171A true US3791171A (en) 1974-02-12

Family

ID=5813615

Family Applications (1)

Application Number Title Priority Date Filing Date
US00269174A Expired - Lifetime US3791171A (en) 1971-07-14 1972-07-05 Centrifugal governor particularly for altering the moment of injection start in diesel engines

Country Status (10)

Country Link
US (1) US3791171A (https=)
AT (1) AT311725B (https=)
BE (1) BE786249A (https=)
BR (1) BR7204605D0 (https=)
CH (1) CH536937A (https=)
ES (1) ES404880A1 (https=)
FR (1) FR2146040A5 (https=)
GB (1) GB1398930A (https=)
IT (1) IT965708B (https=)
NL (1) NL7209166A (https=)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3834184A (en) * 1972-07-27 1974-09-10 Bosch Gmbh Robert Centrifugal injection timing control device for fuel injection pumps in diesel engines
US3942492A (en) * 1974-02-15 1976-03-09 Hitachi, Ltd. Centrifugal ignition advancer device for an ignition system of an internal combustion engine
DE2725414A1 (de) * 1977-06-04 1978-12-14 Bosch Gmbh Robert Fliehkraftversteller, insbesondere zur aenderung des zuend- bzw. einspritzzeitpunktes bei brennkraftmaschinen
US4132202A (en) * 1976-04-17 1979-01-02 Diesel Kiki Co., Ltd. Variable drive coupling for a fuel injection pump
US4497303A (en) * 1981-12-11 1985-02-05 Nippondenso Co., Ltd. Fuel injection timing device for internal combustion engines
US4995368A (en) * 1988-02-04 1991-02-26 Nippondenso Co., Ltd. Fuel injection timing apparatus

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2009936A (en) * 1934-05-28 1935-07-30 Mallory Marion Ignition governor
US2743593A (en) * 1952-05-23 1956-05-01 Bosch Arma Corp Hydraulic automatic timer
US3098366A (en) * 1961-11-16 1963-07-23 Holley Carburetor Co Ignition distributor
US3424875A (en) * 1967-04-28 1969-01-28 Ford Motor Co Distributor spark advance mechanism

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2009936A (en) * 1934-05-28 1935-07-30 Mallory Marion Ignition governor
US2743593A (en) * 1952-05-23 1956-05-01 Bosch Arma Corp Hydraulic automatic timer
US3098366A (en) * 1961-11-16 1963-07-23 Holley Carburetor Co Ignition distributor
US3424875A (en) * 1967-04-28 1969-01-28 Ford Motor Co Distributor spark advance mechanism

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3834184A (en) * 1972-07-27 1974-09-10 Bosch Gmbh Robert Centrifugal injection timing control device for fuel injection pumps in diesel engines
US3942492A (en) * 1974-02-15 1976-03-09 Hitachi, Ltd. Centrifugal ignition advancer device for an ignition system of an internal combustion engine
US4132202A (en) * 1976-04-17 1979-01-02 Diesel Kiki Co., Ltd. Variable drive coupling for a fuel injection pump
DE2725414A1 (de) * 1977-06-04 1978-12-14 Bosch Gmbh Robert Fliehkraftversteller, insbesondere zur aenderung des zuend- bzw. einspritzzeitpunktes bei brennkraftmaschinen
US4227498A (en) * 1977-06-04 1980-10-14 Robert Bosch Gmbh Centrifugal governor, particularly applicable for the alteration of ignition or injection timing in internal combustion engines
US4497303A (en) * 1981-12-11 1985-02-05 Nippondenso Co., Ltd. Fuel injection timing device for internal combustion engines
US4995368A (en) * 1988-02-04 1991-02-26 Nippondenso Co., Ltd. Fuel injection timing apparatus

Also Published As

Publication number Publication date
IT965708B (it) 1974-02-11
DE2135111A1 (de) 1973-01-25
CH536937A (de) 1973-05-15
FR2146040A5 (https=) 1973-02-23
AT311725B (de) 1973-11-26
NL7209166A (https=) 1973-01-16
BE786249A (fr) 1972-11-03
GB1398930A (en) 1975-06-25
BR7204605D0 (pt) 1973-08-30
DE2135111B2 (de) 1977-05-12
ES404880A1 (es) 1975-06-16

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