US3567343A - Hydraulic pump arrangement for internal-combustion engine - Google Patents

Hydraulic pump arrangement for internal-combustion engine Download PDF

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Publication number
US3567343A
US3567343A US796406A US3567343DA US3567343A US 3567343 A US3567343 A US 3567343A US 796406 A US796406 A US 796406A US 3567343D A US3567343D A US 3567343DA US 3567343 A US3567343 A US 3567343A
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US
United States
Prior art keywords
pump
piston
engine
fuel pump
hydraulic pump
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
US796406A
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English (en)
Inventor
Hans Erdmann
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.)
Continental Teves AG and Co OHG
Original Assignee
Alfred Teves GmbH
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
Priority claimed from DE19681601422 external-priority patent/DE1601422C3/de
Application filed by Alfred Teves GmbH filed Critical Alfred Teves GmbH
Application granted granted Critical
Publication of US3567343A publication Critical patent/US3567343A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/04—Feeding by means of driven pumps
    • F02M37/06—Feeding by means of driven pumps mechanically driven
    • 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
    • F02B63/00—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices
    • F02B63/06—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices for pumps

Definitions

  • This rod actuates a stepped piston of a small bydraulic pump mounted directly on the engine block at the pedestal on which the fuel pump is normally seated.
  • An end of the piston extends through the housing of the pump and is fitted with a plastic cap engaging the rocker arm of the engine fuel pump mounted in turn on the hydraulicpump housing.
  • the cam follower is an arcuate shoe engaging around a quarter of the surface of the cam and connected to the rod by a ball-and-socket joint.
  • My present invention relates to a hydraulic-pump arrangement for an internal-combustion engine and, more particular, for an engin having a rocker-arm actuated fuel pump and some auxiliary liquid-circulation system such as power brakes, a load-leveler suspension, the refrigeration unit of the air conditioner, hydraulic winch or lifts, power steering.
  • a rocker-arm actuated fuel pump and some auxiliary liquid-circulation system such as power brakes, a load-leveler suspension, the refrigeration unit of the air conditioner, hydraulic winch or lifts, power steering.
  • a further object is to provide a pump arrangement which can be accommodated to existing engine constructions with a minimum of difficulty and trouble.
  • Yet a further object is to provide an improved pump arrangement which takes up a minimal amount of space and adds a minimum of new mechanism to an internal combustion engine.
  • the piston of my hydraulic pump which is mounted directly on the engine block and forms a pedestal for the conventional fuel pump, is a stepped ice piston whose narrow or small diameter end extends through a seal and the wall of the hydraulic pump and engages the rocker arm of the fuel pump while its large diameter end also passes through a seal and a wall of the hydraulic pump and is coupled to a cam follower in the form of an arcuate sho e riding on the circular periphery of a cam of the engine camshaft.
  • the hydraulic-pump housing defines a cylinder with two lateral (inlet and outlet) openings. Each opening is equipped with a check valve such that fluid may only flow into the pumping chamber through one and out through the other.
  • These openings, constituting the inlet and the outlet of the hydraulic pump, are advantageously of like dimensions (diameters) to make mounting easy and to allow the fittings (e.g., the check valves) to be interchangeable.
  • the cam follower engages a good part of the cam surface via a shoe that is linked to the piston by a ball-and-socket joint.
  • FIG. 1 is a vertical cross-sectional view through an arrangement embodying my invention
  • FIG. 2 is a section through the pump means of FIG. 1, drawn to in enlarged scale;
  • FIG. 3 is a section according to line IIIIII of FIG. 1.
  • an internal-combustion engine 52 of an automotive vehicle has a block 1 and a conventional camshaft 2 carrying a cam or eccentric 3.
  • a shoe 6 seats on this cam 3 over one-fourth of its circumference (at least for best force transmission.
  • the upper part of this shoe 6 is provided with a ball 53 received to more than a hemisphere in a socket 54 of a slider 5 so that it cannot fall out.
  • This slider 5 rides in a bore 4 in part of the engine housing or block 1.
  • a rod 7 is seated in a bore 55 of the slider 5 and seats in turn in a bore 56 in the bottom of a stepped piston 8.
  • this piston 8 is fitted with a low-friction, wear-resistant synthetic-resin cap 24 (e.g., of polytetrafluoroethylene) that engages one end of a rocker arm 25 pivoted at 36 and biased downwardly by a spring 35.
  • the other end of the arm 25 engages the end of a rod 29 which actuates the diaphragm of a nonpositive fuel pump 23 whose spring 29a biases the diaphragm upwardly.
  • This fuel pump has an inlet 27 with a check valve 28 and an outlet 26 which leads to the engine 52. Fuel can enter at 27 into a lower chamber 33, pass through a check valve 31 into a chamber 32, and leave via the outlet conduit 26. Up-and-down motion of the rod 29 transfers fuel from the chamber 33 to the chamber 32 in a manner well known in the art.
  • the rocker arm can be removed and lubricated through a removable plate 34 in the side of the pump 23.
  • FIG. 2 shows my hydraulic pump in greater detail.
  • the hydraulic pump 16 has a piston 8 whose shoulder 41 defines an upper narrow diameter portion and a lower large diameter portion.
  • the upper portion is sealed. by a retaining washer 37 with holes 40 holding an O-ring '14 on a seal 12.
  • the lower portion is sealed by a similar washer 38 with holes 39 on an O-ring 13 on a seal 11.
  • the lower ring is held in place by a threaded plug 15 which permits access to the interior or a cylinder 9 while a spring 10 braced on a stop ring 58 seated on the shoulder 41 holds the washer 37 in place while simultaneously holding the piston 8 in its illustrated starting position.
  • Hydraulic fluid for instance for a power brake, enters through a union-coupling 18 screwed into a bore 48 forming an inlet for the cylinder 58 and can leave through an outlet bore 47 and a ring coupling 17.
  • the coupling 18 has a washer seal 50 and the coupling 17 an identical seal 49.
  • the inlet bore 48 is provided with a check valve 20 and the outlet bore 47 with a check valve 21 both of identical design.
  • the valve 21 consists of a valve plate 42, a spider 44, a spring 43 and a pin 44 that are pressfitted together and form a captive-spring valve.
  • the bores 47 and 48 are of identical diameter and the check valves 20 and 21 also of identical dimensions so that the connections 17 and 18 can be reversed, with similar reversal of the check valves 20 and 21 with no difficulty.
  • the piston 8, due to its different diameters D and d pressurizes the cylinder 9 on upward movement thereby forcing fluid out through the check valve 21, and depressurized it on descending thereby sucking fluid in through the valve 20.
  • the housing 57 of the hydraulic pump 16 is insulated from the cylinder head 1 by a gasket 22 that prevents dangerous heat from getting to the hydraulic fluid and fuel.
  • the linkage is changed since the original cam follower is only meant to transmit around 6 Kp to the fuel pump.
  • the hydraulic pump takes up only a few square centimeters of space in a motor, rather than the relatively large space usually occupied by such devices.
  • the hydraulic pump acts as a spacer or pedestal for the fuel pump.
  • a hydraulic-pump arrangement comprising:
  • an internal-combustion engine having an engine block and a rotatable camshaft
  • pump means for generating hydraulic-fluid pressure and comprising a disk-shaped body provided with a cylinder and a piston axially and reciprocatingly displaceable therein, said piston being actuatable by said drive means;
  • a fuel pump for said engine operatively connected to said piston for actuation thereby, said drive means including at least one rigid elongated member linearly reciprocable by said camshaft for actuating said piston and said fuel pump, said pump means and said fuel pump being mounted one above the other on said engine block, said disk-shaped body being directly mounted on said block and forming a. flange for securing said fuel pump on said engine block.
  • said engine is an internal-combustion engine and has an engine block
  • said shaft is the camshaft of said engine
  • said drive means including at least one rigid elongated member linearly reciprocable by said camshaft for actuating said piston and said fuel pump, said pump means and said 4 fuel pump being mounted one above the other on said engine block.
  • stepped piston forms part of said rigid member and is provided with a shoulder defining a relatively small diameter portion and a relatively large diameter portion along said piston, said fuel pump being connected to said small diameter portion and said drive means being connected to said large diameter portion.
  • said drive means includes a rotating eccentric cam mounted on said camshaft, and a cam follower engaging said cam, said member being operatively connected to said follower.
  • a hydraulic-pump arrangement comprising:
  • an internal-combustion engine having an engine block and a rotatable camshaft
  • pump means for generating hydraulic-fluid pressure and comprising a cylinder and a piston axially and reciprocatingly displaceable therein, said piston being actuatable by said drive means;
  • said drive means including at least one rigid elongated member linearly reciprocable by said camshaft for actuating said piston and said fuel pump, said pump means and said fuel pump being mounted one above the other on said engine block, said fuel pump being mounted on said pump means, said drive means including a rotating eccentric cam mounted on said camshaft, and a cam follower engaging said cam, said member being operatively connected to said follower, said cam having a circular periphery, said cam follower is an arcuate shoe engaging said periphery over an arc of at least said member includes a rigid rod connected to said piston and said drive means further includes a ball joint connecting said shoe to said rod.
  • a hydraulic-pump arrangement comprising:
  • an internal-combustion engine having an engine block and a rotatable camshaft
  • pump means for generating hydraulic-fluid pressure and comprising a cylinder and a piston axially and reciprocatingly displaceable therein, said piston being actuatable by said drive means;
  • said drive means including at least one rigid elongated member linearly reciprocable by said camshaft for actuating said piston and said fuel pump, said pump means and said fuel pump being mounted one above the other on said engine block, said drive means further comprising a circular cam eccentrically mounted on said camshaft and a cam follower engaging said cam over an arc of at least 90 on said cam, said cam follower being formed with a ball head, said mem- 6 her including a sleeve, said sleeve being formed with comprising a rocker arm engaged by said cap, said a socket on one end receiving more than a hemiarrangement further comprising a thermally insulatsphere of said ball head, a longitudinal bore opening gasket between said pump means and said block.
  • said piston being a stepped 5 References Cit d piston having a shoulder defining a relatively large UNITED STATES PATENTS diameter portion and a relatively small diameter portion, said relatively large diameter portion being 1,883,459 10/1932 Avigdor 103-9X engaged by said rod, said pump means further com- 2,028,208 1/1936 Haney 103167X prising spring means biasing said piston toward a 10 2,278, 45 3/1942 Colell 103167X starting position with said large diameter portion ,755,739 7/1956 Euwe 103-9 substantially out of said cylinder, said cylinder hav- 3,051,087 3/ 1962 Scholin 10354X ing an inlet provided with a check valve permitting 3,068,794 12/1962 M ri et 1- 1 9 fluid flow into said cylinder and an outlet provided 3,260,213 7/1966 Eickmann IDS-54 with a check valve permitting fluid flow therefrom, 15

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
US796406A 1968-02-07 1969-02-04 Hydraulic pump arrangement for internal-combustion engine Expired - Lifetime US3567343A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681601422 DE1601422C3 (de) 1968-02-07 1968-02-07 Hydraulische Kolbenpumpe

Publications (1)

Publication Number Publication Date
US3567343A true US3567343A (en) 1971-03-02

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ID=5680927

Family Applications (1)

Application Number Title Priority Date Filing Date
US796406A Expired - Lifetime US3567343A (en) 1968-02-07 1969-02-04 Hydraulic pump arrangement for internal-combustion engine

Country Status (3)

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US (1) US3567343A (enrdf_load_stackoverflow)
FR (1) FR1579985A (enrdf_load_stackoverflow)
GB (1) GB1209838A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11208974B2 (en) * 2018-01-26 2021-12-28 Delphi Technologies Ip Limited Fuel pump

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE445480B (sv) 1980-03-06 1986-06-23 Saab Scania Ab Arrangemang for mekanisk drivning av ett med en forbrenningsmotor forbundet aggregat
US4626458A (en) * 1983-01-06 1986-12-02 Raychem Limited Recoverable article for encapsulation
DE3304723A1 (de) * 1983-02-11 1984-08-16 Kienzle Apparate Gmbh, 7730 Villingen-Schwenningen Anordnung einer einen zusatzkreislauf im betriebssystem eines dieselmotors speisende zusatzpumpe
US8081609B2 (en) 2007-02-14 2011-12-20 Alcatel Lucent Proxy-based signaling architecture for streaming media services in a wireless communication system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11208974B2 (en) * 2018-01-26 2021-12-28 Delphi Technologies Ip Limited Fuel pump

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Publication number Publication date
GB1209838A (en) 1970-10-21
FR1579985A (enrdf_load_stackoverflow) 1969-08-29

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