Intake system for an internal combustion engine

Details Intake system for an internal combustion engine Intake system for an internal combustion engine

1999-06-29

2001-12-04

McMahon, Marguerite (Department: 3747)

Internal-combustion engines

Charge forming device

Heating of combustible mixture

C123S556000, C123S184470

Reexamination Certificate

active

06325053

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to an air intake system for an internal combustion engine.
BACKGROUND OF THE INVENTION
The inclusion of a heater in the air intake system of a compression ignition internal combustion engine is very beneficial in reducing cold start time and white smoke especially during operation under cold ambient conditions. However, the positioning of a heater in the air intake system tends to present packaging problems in that it can interfere with other components and it tends to add height to the engine assembly above the intake manifold. In addition, depending upon the location of the heater in the air intake system, the heater may develop hot spots, thereby reducing its reliability. U.S. Pat. No. 5,595,164 to Thimmesch,
FIG. 1
, is an example of unequal distribution of air causing portions of an elongated heating element
26
in line with inlet
102
to be less hot than the end portions of element
26
which are spaced from inlet
102
. As a result, the useful life of elongated heating element
26
is reduced due to overheating of its ends.
SUMMARY OF THE INVENTION
With a view to mitigating, if not eliminating, the foregoing disadvantages, the present invention provides an intake system for a multi-cylinder internal combustion engine, comprising an intake manifold defining a plenum chamber connectable to a plurality of engine cylinders and an intake duct opening into and supplying ambient air to the plenum chamber and a heater comprising heating element means positioned within the plenum chamber in the path of at least a substantial part of the air entering the plenum chamber from the intake duct.


REFERENCES:
patent: 1247992 (1917-11-01), Nickum
patent: 1344242 (1920-06-01), Newell
patent: 2177840 (1939-10-01), Roualet
patent: 4020815 (1977-05-01), Hubert
patent: 4379443 (1983-04-01), Granger
patent: 4685437 (1987-08-01), Tanaka
patent: 5551387 (1996-09-01), Carter et al.
patent: 5595164 (1997-01-01), Thimmesch
patent: 5743242 (1998-04-01), Thimmesch
patent: 61848 (1982-03-01), None
patent: 783076A1 (1996-12-01), None
patent: 1353255 (1972-01-01), None
patent: 1537162 (1976-03-01), None
patent: 2306570A (1996-09-01), None

Affiliated with

Also associated with

Rating

Intake system for an internal combustion engine does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Intake system for an internal combustion engine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Intake system for an internal combustion engine will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2600464