US3750640A - Emergency stopping device for a fuel-injection internal combustion engine - Google Patents

Emergency stopping device for a fuel-injection internal combustion engine Download PDF

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Publication number
US3750640A
US3750640A US00201004A US3750640DA US3750640A US 3750640 A US3750640 A US 3750640A US 00201004 A US00201004 A US 00201004A US 3750640D A US3750640D A US 3750640DA US 3750640 A US3750640 A US 3750640A
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United States
Prior art keywords
piston
fuel
pump
injection
pumps
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Expired - Lifetime
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US00201004A
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English (en)
Inventor
K Kuhn
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SOC D ETUDES MACH THERMIQUES FR
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Semt
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    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0205—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively for cutting-out pumps or injectors in case of abnormal operation of the engine or the injection apparatus, e.g. over-speed, break-down of fuel pumps or injectors ; for cutting-out pumps for stopping the engine
    • F02M63/021—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively for cutting-out pumps or injectors in case of abnormal operation of the engine or the injection apparatus, e.g. over-speed, break-down of fuel pumps or injectors ; for cutting-out pumps for stopping the engine by locking pump pistons

Definitions

  • ABSTRACT In an internal combustion engine of the fuel-injection type fed with fuel by injection pumps, each pump comprising a piston operated by an actuating mechanism releasably connected thereto and with tripping means adapted to slow down and to stop the engine in case of overspeed, at least one servo-motor operated by said tripping means for acting upon said fuel-injection pumps, an emergency stopping arrangement wherein each one of said pumps is provided with an individual servo-motor acting directly upon the piston of said pump to disconnect said piston from its actuating mechanism.
  • the present invention relates to and has essentially for its object an emergency stopping device for an internal combustion engine of the fuel-injection type, for instance a Diesel engine.
  • the tripping means for instance of the centrifugal type, slowing down or stopping the engine opens a pressurized-fluid intake valve of the engine.
  • the said fluid supplied to a single actuator, the piston of which acts collectively and simultaneously upon all the actuating toothed racks of the injection pumps, so as to stop the injection of fuel from all the pumps.
  • a safety device can no longer work. This leads to serious difficulties such as overspeed and racing" which may severely damage the engine.
  • the present invention has essentially for its purpose to avoid the difficulties just mentioned, by providing for each pump a mechanically independent emergency stopping of the discharge of the said pump, without acting upon its actuating member, for instance its toothed rack.
  • each of the said pumps is provided with an individual servo-motor acting directly upon the piston of the said pump so as to disconnect its actuating member.
  • each said servo-motor comprises an actuator supplied with pressurized fluid by the said tripping means and mounted on the corresponding injection pump, and a lever connected,'on the one hand, to the piston of the said pump and, on the other hand, to the piston of the said actuator and pivotally mounted between its two ends at a fixed point of the said actuator and/or the body of the said pump.
  • FIG. 1 is an emergency stopping system according to the invention, used in connection with four fuelinjection pumps;
  • FIG. 2 is a vertical sectional view of an individual emergency stopping device mounted on a fuel-injection pump
  • FIG. 3 shows the device partially in vertical section upon the line IIIIII of FIG. 2 (left side of the device), and partially in vertical section (right side of the device) with a partially broken away view of the servomotor;
  • FIG. 4 is a longitudinal sectional view upon the line IV--IV of FIG. 2;
  • FIG. 5 is a partial longitudinal sectional view upon the line V-V of FIG. 2.
  • FIG. 1 diagrammatically illustrate a system of automatic regulation of the injection pumps 1 by means of a regulator 50 acting simultaneously upon the toothed racks 7 of the pumps through the medium ofa linkage comprising a cranked shaft 51 connected with the regulator by a resilient connecting member 52 which, in case of need, enables the engine to be stopped by manually actuating the toothed racks by means of the crank 8.
  • the safety device according to the invention is adapted to stop four fuel-injection pumps in case of overspeed or racing of an internal combustion engine, for instance a Diesel engine.
  • the outlet conduit 6" of the overspeed-controlled tripping means 5 is connected with the conduit 6 through which the oil is supplied to the four actuators 2.
  • the centrifugal-acting tripping means 5 which is sensible to overspeed, operates as follows: the push-rod 3 overcomes the action of the spring 3' and causes the lever 4 to pivot by overcoming the action of the return spring 4'.
  • the slide valve 5' is then pushed to the right (in FIG. 1) by the return spring 5", so that the pressurized-fluid intake valve 50 is opened and the two conduits 6 and 6 are interconnected.
  • the pressurized fluid such as for instance compressed air or pressurized oil, arrives through the conduit 6 in the direction indicated by the arrow in FIG. 1, flows through the conduit 6 and is supplied to the four pneumatic or hydraulic actuators 2 which act upon the pistons of the respective fuelinjection pumps 1, thus stopping the supply of fuel in the associated pumps 1, independently of the toothed rack 7 and according to a process which will be described later.
  • FIG. 2 shows a pneumatic or hydraulic actuator 2 mounted on a pump shown partially and indicated generally by the reference digit 1.
  • the actuator 2 is a pneumatic or hydraulic actuator of a type known per se, comprising a piston 11, a piston rod 12, a seal 13 and a cylinder 14.
  • the actuator 2 is mounted on a lateral orifice 15 permitting the access, for instance, to the system of regulation of the injection stroke of the pump 1.
  • the pump 1 is a fuel-injection pump of a conventional type and, consequently, only the novel and advantageous elements provided by the invention will be considered in the following description, without describing the mounting details already known in the art.
  • a lever 16 At the junction of the pump 1 and the pneumatic or hydraulic actuator 2, at the level of the orifice 15, is mounted a lever 16 provided with two forks 18, 19 and adapted to pivot on its fulcrum 17. The end of the fork 18 of the pivotable lever 16 is located between the tappet 29 and the guide 20 of the piston (not shown) of the pump 1. The lever 16 is retained in its central portion by a yoke 22 solid with the cylinder 14 (see FIGS. 3 and 4).
  • a lever 21 provided on the actuator 2 permits manual actuation, through the medium of the stopping device, of the piston of the associated injection pump 1 in order to prime the latter.
  • the lever 21 is pivotallymounted on a pin 25 of the link 24 hinged at 25 to the member 23 engaging the upper portion of the cylinder 14 of pneumatic or hydraulic actuator 2.
  • the lever 21 also acts as an emergency hand control lever which permits manual actuation of the piston 11 of the actuator 2 in order to cut off the connection between the piston of the pump 1 and its actuating mechanism, in case of a failure of the tripping means 5.
  • the pneumatic or hydraulic actuator 2 is shown as being advantageously mounted on the pump 1 at the level of the opening 15, it is readily understood that it may be mounted at another point on thepump, the arrangement being so designed as to enable the fork 18 of the pivotable lever 16 to come into contact with the portion -26 (FIG. 2) of the guide of the piston 20 of the pump 1, so as to raise the latter as will be described herein under.
  • the operation of the latter in case of engine overspeed will now be explained.
  • the centrifugal-action tripping means controls all the actuators 2.
  • This control consists in opening the pressurized-fluid intake valve 5a, the said fluid being thus supplied to the hydraulic actuators 2 associated, respe'ctively,,with the pumps 1, by being conveyed by each conduit 27 (FIG. 2) into the associated actuator.
  • the pressurized fluid pushes the piston of the actuator 11 downwardly until the latter, occupies the position shown in dotted lines in FIG. 2.
  • the piston 11 acts upon the pivotable lever 16 through the medium of the fork 19. More specifically, the left arm (in FIG. 2) of the lever 16 is lowered to a lower position (shown in dotted lines in FIG. 2), whereas the right arm of the lever and, therefore, the fork 18 of the lever 16 is raised,
  • the assembly formed by the lever 21 and its supporting elements 24, 25, 25 is a removable assembly which is adapted, by a lateral or transverse motion, onto the cylinder head of each actuator 2, where it is retained by being keyed under the flange of a projecting portion 14a integral with the cylinder head.
  • a single such assembly can be used successively for all the actuators 2.
  • the invention is applicable more particularly to the internal combustion engines of automotive vehicles and ships.
  • an emergency stopping arrangement comprising tripping means adapted to supply servo-motors with pressure fluid in case of overspeed of the engine, each of said servemotors being associated with one of said-pumps and comprising a piston-type actuator mounted on the associated injection pump, and a lever connected, on the one hand, to the piston of said pump and, on the other hand, to the piston of said actuator and pivotally mounted between its two ends on a stationary fulcrum point.
  • each pump is formed with a lateral orifice giving access at least to the operative connection between its piston and associated actuating mechanism and each one of said actuators is mounted on said lateral orifice for releasably engaging said connection.
  • each one of said actuators comprises a manual control lever for operating same.

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  • 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)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
US00201004A 1970-12-31 1971-11-22 Emergency stopping device for a fuel-injection internal combustion engine Expired - Lifetime US3750640A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7047558A FR2120400A5 (it) 1970-12-31 1970-12-31

Publications (1)

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US3750640A true US3750640A (en) 1973-08-07

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ID=9066696

Family Applications (1)

Application Number Title Priority Date Filing Date
US00201004A Expired - Lifetime US3750640A (en) 1970-12-31 1971-11-22 Emergency stopping device for a fuel-injection internal combustion engine

Country Status (14)

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US (1) US3750640A (it)
JP (1) JPS524681B1 (it)
CH (1) CH543672A (it)
DE (1) DE2165516A1 (it)
DK (1) DK134867B (it)
ES (1) ES397283A1 (it)
FI (1) FI53344C (it)
FR (1) FR2120400A5 (it)
GB (1) GB1371665A (it)
IT (1) IT943859B (it)
NL (1) NL154580B (it)
NO (1) NO136160C (it)
SE (1) SE376460B (it)
SU (1) SU466677A3 (it)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4016851A (en) * 1973-09-06 1977-04-12 Societe D'etudes De Machines Thermiques Safety control method and device for limiting the temperature of a fluid to a given upper value
US4166442A (en) * 1976-05-06 1979-09-04 Computer Driver Control Holdings (Proprietary) Limited Protection of internal combustion engines and/or vehicles embodying the same

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3065453A1 (fr) 2017-04-25 2018-10-26 Centre National De La Recherche Scientifique Procede de preparation de silice mesoporeuse

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2551429A (en) * 1948-11-19 1951-05-01 Ingersoll Rand Co Safety trip device for motors responsive to temperature, speed, and pressure
US2719521A (en) * 1953-05-11 1955-10-04 Caterpillar Tractor Co Emergency shutdown controls for diesel engines
US2831474A (en) * 1954-09-01 1958-04-22 Caterpillar Tractor Co Overspeed shutdown controls for diesel engines
US2854964A (en) * 1957-01-17 1958-10-07 Caterpillar Tractor Co Emergency shutdown control for industrial engines
US3388695A (en) * 1967-02-17 1968-06-18 James J. O'donnell Safety shut-down for diesel engines

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2551429A (en) * 1948-11-19 1951-05-01 Ingersoll Rand Co Safety trip device for motors responsive to temperature, speed, and pressure
US2719521A (en) * 1953-05-11 1955-10-04 Caterpillar Tractor Co Emergency shutdown controls for diesel engines
US2831474A (en) * 1954-09-01 1958-04-22 Caterpillar Tractor Co Overspeed shutdown controls for diesel engines
US2854964A (en) * 1957-01-17 1958-10-07 Caterpillar Tractor Co Emergency shutdown control for industrial engines
US3388695A (en) * 1967-02-17 1968-06-18 James J. O'donnell Safety shut-down for diesel engines

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4016851A (en) * 1973-09-06 1977-04-12 Societe D'etudes De Machines Thermiques Safety control method and device for limiting the temperature of a fluid to a given upper value
US4166442A (en) * 1976-05-06 1979-09-04 Computer Driver Control Holdings (Proprietary) Limited Protection of internal combustion engines and/or vehicles embodying the same

Also Published As

Publication number Publication date
GB1371665A (en) 1974-10-23
FI53344C (fi) 1978-04-10
DK134867C (it) 1977-06-20
FR2120400A5 (it) 1972-08-18
FI53344B (it) 1977-12-30
SU466677A3 (ru) 1975-04-05
NO136160C (no) 1977-08-03
JPS524681B1 (it) 1977-02-05
NO136160B (no) 1977-04-18
ES397283A1 (es) 1974-05-16
SE376460B (it) 1975-05-26
CH543672A (fr) 1973-10-31
NL154580B (nl) 1977-09-15
DK134867B (da) 1977-01-31
IT943859B (it) 1973-04-10
NL7116566A (it) 1972-07-04
DE2165516A1 (de) 1972-07-06

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