EP0099143A1 - Systèmes de régulation de pompe d'injection - Google Patents

Systèmes de régulation de pompe d'injection Download PDF

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Publication number
EP0099143A1
EP0099143A1 EP83200913A EP83200913A EP0099143A1 EP 0099143 A1 EP0099143 A1 EP 0099143A1 EP 83200913 A EP83200913 A EP 83200913A EP 83200913 A EP83200913 A EP 83200913A EP 0099143 A1 EP0099143 A1 EP 0099143A1
Authority
EP
European Patent Office
Prior art keywords
cam
regulator
speed regulator
throughput
movement
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.)
Withdrawn
Application number
EP83200913A
Other languages
German (de)
English (en)
Inventor
Manuel Roca-Nierga
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.)
Spica SpA
Original Assignee
Spica SpA
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 Spica SpA filed Critical Spica SpA
Publication of EP0099143A1 publication Critical patent/EP0099143A1/fr
Withdrawn legal-status Critical Current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
    • F02M41/00—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor
    • F02M41/08—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined
    • F02M41/10—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined pump pistons acting as the distributor
    • F02M41/12—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined pump pistons acting as the distributor the pistons rotating to act as the distributor
    • F02M41/123—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined pump pistons acting as the distributor the pistons rotating to act as the distributor characterised by means for varying fuel delivery or injection timing
    • F02M41/125—Variably-timed valves controlling fuel passages
    • F02M41/126—Variably-timed valves controlling fuel passages valves being mechanically or electrically adjustable sleeves slidably mounted on rotary piston
    • 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
    • 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

Definitions

  • control device which regulates the fuel delivery as a function of the position of a control member controlled by the operator, and of the braking load applied to the internal combustion engine.
  • This control device is commonly known as a speed regulator, and is mostly constructed on mechanical or hydraulic principles. Certain drawbacks are however associated with these types of regulator. The main drawback is the timing delay due to the regulator frequency characteristics and the inertia of the injection pump control members. Moreover, complicated devices have to be added in order to perform other auxiliary functions (torque correction, maximum throughput limitation in accordance with the booster feed pressure, excess fuel on starting etc.).
  • the object of the present invention is however to provide a simple and convenient system for obtaining from an electronically controlled throughput regulator for injection pumps the most wide and variable range of choice of the law of throughput regulation as a function of the modulation of the electrical signal.
  • the invention provides for the use of a suitably profiled cam element operated by electrical actuators, in order to act, in opposition to elastic means, directly and constantly against the regulator lever connected to the injection pump delivery control element.
  • cams can be of linear pattern in which the relationship between the angle of rotation and the relative movement of the throughput control element always remains constant over the entire range of operation, or cams can be of differential pattern in order to increase sensitivity of regulation in a required range of throughputs.
  • limit abutments on the cam in order to provide the electronic means with a reference signal.
  • the contact between the cam and regulator lever can be effected by means of a rotatable roller element.
  • the cam disc is operated by an electric motor of the servo-controlled or stepping type, which following instructions received from a central electronic control unit provides for effecting the angular. movement of the cam until the exact fuel delivery corresponding to the engine operating conditions has been obtained.
  • the axis of the electric motor - cam disc assembly can either be . horizontal or vertical, as dictated by size requirements.
  • Figure l shows in diagrammatic form one embodiment of the device according to the invention which is particularly suitable for regulating an injection pump of the distributor type, and which uses a discoidal cam of vertical axis.
  • the cam 1 is driven by the electric motor 2, which constitutes the actuator of a control circuit rigid with the injection pump casing (not shown).
  • the return spring 3, acting on the transmission lever 4, keeps the roller 5, connected to said lever 4, in constant contact with the circular surface of the cam 1.
  • the transmission lever 4 is pivoted on the pin 6 of the flange 7, also rigid with the pump casing, to transmit, by means of the spherical pin 8, the regulation movement to the control member 9 of the pumping element 10 of the injection pump.
  • Figure 2 shows a diagram in which the angular positions of the cam, indicated by o(, are shown as abscissae, and the unit throughput of the pump, ie the delivery Q for each stroke of the piston, are shown as ordinates.
  • Figure 3 shows a cam disc 1 with variable pitch.
  • the variation in lift per unit rotation of the cam increases considerably in the quadrant between 180° and 270 * . If however it were required to maintain the same proportionality over the entire range (continuous line A of Figure 1), the cam disc would assume the form of a constant pitch spiral.
  • the disc of Figure 3 also comprises two limiting abutments (F.C.) in order to supply the required references to the cam control logic.
  • Figure. 4" shows a regulator mechanism which is functionally similar to that of Figure 1, but comprises a control unit of horizontal axis. The choice between the different possible positions of the control unit is dictated by size or accessibility reasons.
  • FIG. 6 shows a different system for operating the cam disc.
  • This is again an electrical modulation means, but instead of the stepping or servo-controlled motor a linear electromagnet of variable force 13 is used.
  • the force (F) of the electromagnet is opposed by the reaction (R) of the return spring 14.
  • the wider freedom of choice in positioning these two elements can be noted.
  • This mobility can be obtained for example by means of a pin which is eccentric to the support flange 7, or by means of a double lever system similar to that shown in Figure 5.
  • the delivery control element has been shown in the form of a ring cooperating with the piston of the injection pump pumping element. This structure is used in certain known versions of distributor pumps. The use of regulation by means of a cam disc can however be extended to any type of injection pump without leaving the scope of the invention.
  • said cam can be made to act directly on the control ring 9 of a distributor pump ( Figure 7).
  • the follower 5 of the cam 1 can be made to simply translate in a guide indicated diagrammatically by 20, so that when it moves it drags the regulator ring of the distributor pump.
  • the device for controlling an injection pump in which throughput regulation is effected by a rack-type rod 15 can assume a similar structure.
  • the follower 5 can be mounted rigidly with this latter.
  • Figure 9 shows such a device configuration, in which a cam 21 slides on guides 22 controlled by an electromagnet 23 of variable pulling force, which is opposed by the return spring 24.
  • the follower 25, which acts on the cam profile, is carried by the lever 26, which
  • a control system with a follower which makes unidirectional contact ie by means of elastic thrust
  • a bidirectional positive control system can be chosen or a bidirectional positive control system.
  • the device of Figure 9 can assume the structure illustrated in Figure 10 in which the follower guide is a slot, which means that the elastic return system constituted by the spring 29 is not necessary.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP83200913A 1982-07-14 1983-06-20 Systèmes de régulation de pompe d'injection Withdrawn EP0099143A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2238982 1982-07-14
IT22389/82A IT1151848B (it) 1982-07-14 1982-07-14 Miglioramenti ai sistemi di regolazione delle pompe di iniezione per motori a combustione interna

Publications (1)

Publication Number Publication Date
EP0099143A1 true EP0099143A1 (fr) 1984-01-25

Family

ID=11195620

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83200913A Withdrawn EP0099143A1 (fr) 1982-07-14 1983-06-20 Systèmes de régulation de pompe d'injection

Country Status (2)

Country Link
EP (1) EP0099143A1 (fr)
IT (1) IT1151848B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0218927A1 (fr) * 1985-09-13 1987-04-22 Klöckner-Humboldt-Deutz Aktiengesellschaft Dispositif d'arrêt électromagnétique pour un moteur à combustion

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2160672A1 (fr) * 1971-11-18 1973-06-29 Nippon Denso Co
FR2225632A1 (fr) * 1973-04-14 1974-11-08 Cav Ltd
EP0020320A1 (fr) * 1979-06-05 1980-12-10 Friedmann & Maier Aktiengesellschaft Dispositif de réglage pour moteur à combustion interne à injection

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2160672A1 (fr) * 1971-11-18 1973-06-29 Nippon Denso Co
FR2225632A1 (fr) * 1973-04-14 1974-11-08 Cav Ltd
EP0020320A1 (fr) * 1979-06-05 1980-12-10 Friedmann & Maier Aktiengesellschaft Dispositif de réglage pour moteur à combustion interne à injection

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0218927A1 (fr) * 1985-09-13 1987-04-22 Klöckner-Humboldt-Deutz Aktiengesellschaft Dispositif d'arrêt électromagnétique pour un moteur à combustion

Also Published As

Publication number Publication date
IT1151848B (it) 1986-12-24
IT8222389A0 (it) 1982-07-14
IT8222389A1 (it) 1984-01-14

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Legal Events

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

Designated state(s): DE FR GB

KL Correction list

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Effective date: 19840404

STAA Information on the status of an ep patent application or granted ep patent

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18D Application deemed to be withdrawn

Effective date: 19871121

RIN1 Information on inventor provided before grant (corrected)

Inventor name: ROCA-NIERGA, MANUEL