Engine lubrication circuit including two pumps

Details Engine lubrication circuit including two pumps Engine lubrication circuit including two pumps

2006-10-03

2006-10-03

Gimie, Mahmoud (Department: 3747)

Internal-combustion engines

Lubricators

Crankcase, pressure control

Reexamination Certificate

active

07114482

ABSTRACT:
A lubrication pump coupled to the engine is sized such that the it can supply the engine with a predetermined flow volume as soon as the engine reaches a peak torque engine speed. In engines that operate predominately at speeds above the peak torque engine speed, the lubrication pump is often producing lubrication fluid in excess of the predetermined flow volume that is bypassed back to a lubrication fluid source. This arguably results in wasted power. In order to more efficiently lubricate an engine, a lubrication circuit includes a lubrication pump and a variable delivery pump. The lubrication pump is operably coupled to the engine, and the variable delivery pump is in communication with a pump output controller that is operable to vary a lubrication fluid output from the variable delivery pump as a function of at least one of engine speed and lubrication flow volume or system pressure. Thus, the lubrication pump can be sized to produce the predetermined flow volume at a speed range at which the engine predominately operates while the variable delivery pump can supplement lubrication fluid delivery from the lubrication pump at engine speeds below the predominant engine speed range.

REFERENCES:
patent: 2838039 (1958-06-01), Smith
patent: 4458644 (1984-07-01), Papst
patent: 4512298 (1985-04-01), Hayashi
patent: 4531485 (1985-07-01), Murther
patent: 4642604 (1987-02-01), Glesmann et al.
patent: 4741304 (1988-05-01), Martin et al.
patent: 5063895 (1991-11-01), Ampferer
patent: 5085181 (1992-02-01), Feuling
patent: 5121720 (1992-06-01), Roberts
patent: 5168845 (1992-12-01), Peaker
patent: 5247914 (1993-09-01), Imai et al.
patent: 5390635 (1995-02-01), Kidera et al.
patent: 5511522 (1996-04-01), Tran
patent: 5597051 (1997-01-01), Moriya et al.
patent: 5743231 (1998-04-01), Reinosa
patent: 5765521 (1998-06-01), Stutzle et al.
patent: 5816212 (1998-10-01), Lindquist et al.
patent: 5845756 (1998-12-01), Dairokuno et al.
patent: 5884601 (1999-03-01), Robinson
patent: 5894825 (1999-04-01), Duerr
patent: 5901811 (1999-05-01), Samples et al.
patent: 6293233 (2001-09-01), Hiraoka
patent: 6305342 (2001-10-01), Narita et al.
patent: 6443263 (2002-09-01), Ito et al.
patent: 6739305 (2004-05-01), Takahara et al.

Affiliated with

Also associated with

Rating

Engine lubrication circuit including two pumps does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Engine lubrication circuit including two pumps, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Engine lubrication circuit including two pumps will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3655708