GB1472125A - Fuel-injection pump for an internal combustion eingine - Google Patents

Fuel-injection pump for an internal combustion eingine

Info

Publication number
GB1472125A
GB1472125A GB2011074A GB2011074A GB1472125A GB 1472125 A GB1472125 A GB 1472125A GB 2011074 A GB2011074 A GB 2011074A GB 2011074 A GB2011074 A GB 2011074A GB 1472125 A GB1472125 A GB 1472125A
Authority
GB
United Kingdom
Prior art keywords
plunger
fuel
slit
bore
orifice
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
Application number
GB2011074A
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.)
Yanmar Co Ltd
Original Assignee
Yanmar Diesel Engine Co Ltd
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 Yanmar Diesel Engine Co Ltd filed Critical Yanmar Diesel Engine Co Ltd
Priority to GB2011074A priority Critical patent/GB1472125A/en
Publication of GB1472125A publication Critical patent/GB1472125A/en
Expired legal-status Critical Current

Links

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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/24—Varying fuel delivery in quantity or timing with constant-length-stroke pistons having variable effective portion of stroke
    • F02M59/26—Varying fuel delivery in quantity or timing with constant-length-stroke pistons having variable effective portion of stroke caused by movements of pistons relative to their cylinders
    • F02M59/265—Varying fuel delivery in quantity or timing with constant-length-stroke pistons having variable effective portion of stroke caused by movements of pistons relative to their cylinders characterised by the arrangement or form of spill port of spill contour on the piston

Landscapes

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

Abstract

1472125 Fuel injection pumps YANMAR DIESEL ENGINE CO Ltd 7 May 1974 20110/74 Heading F1A In a fuel injection pump comprising an angularly adjustable plunger 3 reciprocable in a cylinder barrel 2 to deliver fuel from a working chamber 20 past a discharge valve 4, the delivery being controlled by the relative co-operation between a by-pass orifice 9' in the cylinder and a metering slit 12 in the plunger periphery and connected to the working chamber 20 by a bore 11 extending through the plunger, the metering slit 12 is of smaller flow area than the by-pass orifice 9' and the bore 11. Because of the small area of the metering slit fuel flows past the discharge valve and out through the by-pass orifice 9' at the same time, whereby sudden rises in the delivery pressure are avoided. The by-pass orifice 9' is elliptical and the slit 12 is transverse to the plunger axis. A radial bore opening on to the periphery of the plunger adjacent one end of the slit 12 is connected to the bore 11. Fuel passing the discharge valve 4 passes through a pulsation chamber 15 having smaller diameter inlet and outlet passages 17, 16, respectively. Fuel enters the working chamber 20 through a suction port 8. In the zero delivery position of the plunger the metering slit 12 and the radial bore communicate with the orifice 9' before the suction port 8 is closed.
GB2011074A 1974-05-07 1974-05-07 Fuel-injection pump for an internal combustion eingine Expired GB1472125A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2011074A GB1472125A (en) 1974-05-07 1974-05-07 Fuel-injection pump for an internal combustion eingine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2011074A GB1472125A (en) 1974-05-07 1974-05-07 Fuel-injection pump for an internal combustion eingine

Publications (1)

Publication Number Publication Date
GB1472125A true GB1472125A (en) 1977-05-04

Family

ID=10140552

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2011074A Expired GB1472125A (en) 1974-05-07 1974-05-07 Fuel-injection pump for an internal combustion eingine

Country Status (1)

Country Link
GB (1) GB1472125A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2266350A (en) * 1992-04-09 1993-10-27 Bosch Gmbh Robert Fuel-injection pump for internal combustion engines.
GB2273320A (en) * 1992-12-08 1994-06-15 Lucas Ind Plc Fuel injection pump.
GB2285096A (en) * 1993-12-27 1995-06-28 Caterpillar Inc Formation of interconected high pressure passages
US5984208A (en) * 1997-11-03 1999-11-16 Caterpillar Inc. Fuel injector having a press-in valve seat

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2266350A (en) * 1992-04-09 1993-10-27 Bosch Gmbh Robert Fuel-injection pump for internal combustion engines.
US5322423A (en) * 1992-04-09 1994-06-21 Robert Bosch Gmbh Fuel injection pump for internal combustion engines
GB2266350B (en) * 1992-04-09 1995-07-12 Bosch Gmbh Robert Fuel-injection pump for internal combustion engines
GB2273320A (en) * 1992-12-08 1994-06-15 Lucas Ind Plc Fuel injection pump.
GB2273320B (en) * 1992-12-08 1995-09-13 Lucas Ind Plc Fuel injection pump
GB2285096A (en) * 1993-12-27 1995-06-28 Caterpillar Inc Formation of interconected high pressure passages
GB2285096B (en) * 1993-12-27 1997-12-03 Caterpillar Inc Method of operating a high-pressure apparatus such as a fuel injector
US5984208A (en) * 1997-11-03 1999-11-16 Caterpillar Inc. Fuel injector having a press-in valve seat

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Legal Events

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