Internal combustion engine

Details Internal combustion engine Internal combustion engine

1985-03-01

1987-02-10

Wolfe, Jr., Willis R.

Internal-combustion engines

Precombustion and main combustion chambers in series

Plural precombustion chambers

123274, 123292, F02B 1902

Patent

active

046416161

DESCRIPTION:

BRIEF SUMMARY
This invention relates to an internal combustion engine.
Particularly, the invention is concerned with an internal combustion engine of the kind comprising a main combustion chamber communicating with a subsidiary combustion chamber and flow control means for controlling fluid flow between these, the control means being effective to at least provide a substantial restriction to communication between the combustion chambers, prior to ignition of a subsidiary air fuel charge introduced into the subsidiary combustion chamber in use of the engine, and to subsequently effect relief of said restriction whereby ignited said subsidiary air fuel charge is caused to pass to said main combustion chamber via a passageway extending from the subsidiary combustion chamber to effect ignition of a main working fluid charge in the main combustion chamber, the igniting working fluid charge then expanding against a movable part of the engine to effect operation thereof. Engines as described above, being reciprocating piston engines, are described in my U.S. Pat. No. 4,248,192. In this instance the main combustion chamber communicates with the cylinder space above the piston, such as via an intermediate passage leading to the cylinder, and expansion of the ignited main air fuel charge takes place in the space above the piston.
Engines constructed as above described have been found to be particularly effective in use. Preferred embodiments of such an engine operate on a four stroke cycle, for example with a relatively high compression ratio, such as in the range 12-15:1, for the main air-fuel charge and a relatively low compression ratio such as in the range 6-8:1 for the subsidiary charge. With these engines, separate fuel injection into the two combustion chambers has been found to be effective, with air being admitted to the engine only via an inlet valve to the cylinder volume which communicates with the main combustion chamber, and with the burnt air fuel mixture being exited only via an outlet valve from the cylinder volume so as to avoid air scavenging of the subsidiary combustion chamber.
These engines are capable of operation under a wide range of loads with good efficiency whilst the described "split phase" combustion process has been found to give particularly effective burning of the air fuel charges with minimum generation of undesirable engine emissions, and a tolerance to various differing types of fuel.
The present invention is directed generally towards provision of an improved control means for an engine of the first above described kind.
In accordance with this invention, an internal combustion engine as first above described is characterised in that said control means comprises an element movable in a lengthwise direction of said passageway and arranged to execute lengthwise reciprocatory motion when the engine is operated, said element having a peripheral surface portion thereon which portion is caused to be moved into adjacent relationship with a peripheral surface portion of the passageway, during said reciprocatory movement, whereby to effect said at least substantial restriction of communication between the combustion chamber and is caused to be moved away from said surface portion of the passageway during said reciprocation to present a clearance between the surface portions for effecting said relief of said restriction.
Preferably, the surface portion of the element is cylindrical and the surface portion of the passageway is of complimentary form. Preferably, said element is arranged to move through said passageway, during said reciprocation, whereby to be clear of the surface portion of the passageway at opposite ends of the surface portion of the passageway respectively at respective opposite extremes of the reciprocatory movement, whereby the control means is in an open condition at such extremes and in a substantially closed condition at an intermediate position between said extremes. The element may be driven directly from the engine, such as from the engine cam shaft via a rocker type arrangemen

REFERENCES:
patent: 1653825 (1927-12-01), Saives
patent: 4248192 (1981-02-01), Lampard
patent: 4372264 (1983-02-01), Trucco
patent: 4440124 (1984-04-01), Eckert

Affiliated with

Also associated with

Rating

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 Internal combustion engine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Internal combustion engine will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2358468