GB2254107A - Lubricating i.c.engine oil pump idler gears - Google Patents

Lubricating i.c.engine oil pump idler gears Download PDF

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Publication number
GB2254107A
GB2254107A GB9205186A GB9205186A GB2254107A GB 2254107 A GB2254107 A GB 2254107A GB 9205186 A GB9205186 A GB 9205186A GB 9205186 A GB9205186 A GB 9205186A GB 2254107 A GB2254107 A GB 2254107A
Authority
GB
United Kingdom
Prior art keywords
lubricating
engine
bush
oil pump
engine oil
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Withdrawn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
GB9205186A
Other versions
GB9205186D0 (en
Inventor
Paul Geoffrey Evans
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.)
Concentric Pumps Ltd
Original Assignee
Concentric Pumps 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 Concentric Pumps Ltd filed Critical Concentric Pumps Ltd
Publication of GB9205186D0 publication Critical patent/GB9205186D0/en
Publication of GB2254107A publication Critical patent/GB2254107A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/02—Pressure lubrication using lubricating pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M9/00—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
    • F01M9/06—Dip or splash lubrication
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16N—LUBRICATING
    • F16N15/00—Lubrication with substances other than oil or grease; Lubrication characterised by the use of particular lubricants in particular apparatus or conditions

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Pumps (AREA)

Abstract

The bush 16 journalling an idler gear 14 in a drive train between the drive shaft 12 and lubrication pump is impregnated with PTFE and exposed to the sump for splash lubrication. <IMAGE>

Description

IMPROVEMENTS IN I.C. ENGINES This invention relates to I.C. engines and particularly oil pump drives therefor. A conventional arrangement has a gear train including a pinion on the crankshaft and another driving the pump with at least one intermediate idler gear. The pump delivers into a gallery leading through the engine block first to the oil filter, so that all parts of the engine may be lubricated with the oil distributed from the filter. however, the idler gear, that is the bearing supporting the idler gear, is difficult to lubricate because of its location.
One possibility for the idler gear is to provide a special return gallery from the filter leading (only) to the idler gear. This is regarded as inconvenient and relatively expensive. Another alternative is to rely upon splash lubrication, that is arrange for a portion of the shaft on which the idler gear is journalled, or with which it is fast, to be exposed to the sump so that oil mist as a result of the usual splashing from the rotating cranks in the sump will cause some oil to reach the journal surfaces for this lubrication. However this is found to be an unreliable method of lubricating this idler gear. Alternatively, unfiltered oil may be bled direct from the pump which is simple and inexpensive, but has the inevitable disadvantage of using unfiltered oil and may result in high rates of wear.So all of these solutions now seem to be equally unsatisfactory, albeit for different reasons.
The object of the invention is to provide a new solution to the problem.
According to the invention we provide a low friction material coating on a journal bush for the idler gear.
It is believed that due to the location of the gear the oil mist will then be sufficient for lubrication.
Preferably PTFE is used, and most conveniently in the form of a coating or impregnation on a bush used to journal a stub shaft integral with the idler pinion itself and rotatable in a bore in a timing cover which also locates the pump.
One embodiment of the invention is illustrated with reference to the accompanying drawing. In the drawing the reference 10 indicates a drive gear mounted on a shaft 12 and located in a so-called timing case. Idler gear 14 is meshed with the drive gear 10 and also with the pump drive (not shown). The gear 14 is supported on a bush 16 carried on a spindle 18 fast in the block 20, and the idler is retained in position axially by the usual washer and circlip arrangement 22. In accordance with the invention, the bush 16 is impregnated with PTFE.

Claims (3)

1. An I.C. engine having a gear train extending between a drive shaft and the lubricant pump of the engine, with an idler gear in. that train, said idler being exposed to the engine sump for splash lubrication, and with a bush journalling said idler on said shaft, and characterised in that said bush is of low -friction material.
2. An engine as claimed in Claim 1 wherein said bush is impregnated with PTFE.
3. An I.C. engine substantially as described with reference to the accompanying drawing.
GB9205186A 1991-03-14 1992-03-10 Lubricating i.c.engine oil pump idler gears Withdrawn GB2254107A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB919105387A GB9105387D0 (en) 1991-03-14 1991-03-14 Improvements in i.c.engines

Publications (2)

Publication Number Publication Date
GB9205186D0 GB9205186D0 (en) 1992-04-22
GB2254107A true GB2254107A (en) 1992-09-30

Family

ID=10691552

Family Applications (2)

Application Number Title Priority Date Filing Date
GB919105387A Pending GB9105387D0 (en) 1991-03-14 1991-03-14 Improvements in i.c.engines
GB9205186A Withdrawn GB2254107A (en) 1991-03-14 1992-03-10 Lubricating i.c.engine oil pump idler gears

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB919105387A Pending GB9105387D0 (en) 1991-03-14 1991-03-14 Improvements in i.c.engines

Country Status (1)

Country Link
GB (2) GB9105387D0 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2714450A1 (en) * 1993-12-27 1995-06-30 Honda Motor Co Ltd Dry auto-lubrication between permanent mating shafts in two stroke engine
CN104976498A (en) * 2015-07-13 2015-10-14 常州市宏硕电子有限公司 Combined fuel pump
EP2159454B1 (en) * 2008-08-26 2016-12-21 Perkins Engines Company Limited Idler gear and hub with coating

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB908603A (en) * 1959-07-23 1962-10-24 Glacier Co Ltd Plain bearings
GB1042012A (en) * 1961-09-11 1966-09-07 Waterford Ironfounders Ltd Improvements in the coating of articles with polytetrafluoroethylene
GB1277508A (en) * 1968-12-19 1972-06-14 Schmidt Gmbh Karl A sliding contact bearing
GB2104979A (en) * 1981-08-12 1983-03-16 Daido Metal Co Multi-layer bearing

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB908603A (en) * 1959-07-23 1962-10-24 Glacier Co Ltd Plain bearings
GB1042012A (en) * 1961-09-11 1966-09-07 Waterford Ironfounders Ltd Improvements in the coating of articles with polytetrafluoroethylene
GB1277508A (en) * 1968-12-19 1972-06-14 Schmidt Gmbh Karl A sliding contact bearing
GB2104979A (en) * 1981-08-12 1983-03-16 Daido Metal Co Multi-layer bearing

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2714450A1 (en) * 1993-12-27 1995-06-30 Honda Motor Co Ltd Dry auto-lubrication between permanent mating shafts in two stroke engine
ES2122834A1 (en) * 1993-12-27 1998-12-16 Honda Motor Co Ltd Lubricating structure in engine power take off device
EP2159454B1 (en) * 2008-08-26 2016-12-21 Perkins Engines Company Limited Idler gear and hub with coating
CN104976498A (en) * 2015-07-13 2015-10-14 常州市宏硕电子有限公司 Combined fuel pump

Also Published As

Publication number Publication date
GB9105387D0 (en) 1991-05-01
GB9205186D0 (en) 1992-04-22

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)