Secondary air supply system for internal combustion engines

Details Secondary air supply system for internal combustion engines Secondary air supply system for internal combustion engines

1996-05-13

1998-05-26

McMahon, Marguerite

Power plants

Internal combustion engine with treatment or handling of...

By means producing a chemical reaction of a component of the...

123572, F01N 310

Patent

active

057550956

ABSTRACT:
An improved and easily adaptable system to provide secondary air for an internal combustion engine, including a single-cylinder engine unit having (i) a closed crankcase capable of experiencing pressure pulsations produced by the reciprocating motion of a piston in a cylinder, (ii) in the case of a four-cycle engine, a crankcase breather system including a breather assembly attached to a chamber integrally formed with the engine block, or, in the case of a two-cycle engine, an intake reed plate attached to the intake port of the engine, and (iii) an exhaust system including a catalytic converter. The secondary air supply system consists of an external secondary air pump, such as a diaphragm pump, as disclosed in U.S. Pat. No. 5,197,282, and an air pump actuator plate which fits between: (a) in the case of a four-cycle engine, the crankcase breather assembly and the engine block, enabling the crankcase breather system to remain functional; or (b) in the case of a two-cycle engine, the intake reed plate and the intake port. The actuator plate consists of a spacer with an inner opening into which either the crankcase breather assembly fits in the case of a four-cycle engine, or the reed plate fits in the case of a two-cycle engine. The actuator plate further consists of a housing defining a chamber located on one side of said spacer, and a slotted port situated in the side of said spacer such that said chamber is in airflow communication with the inner opening of said spacer and, hence, with the engine crankcase. The principal purpose of the actuator plate is to enable the crankcase pressure pulsations to be communicated to the external air pump by means of a hose or other operative connection without the need to drill holes or install fittings in, or otherwise modify or disassemble, the engine crankcase or block.

REFERENCES:
patent: 3106821 (1963-10-01), Ridgway
patent: 3314230 (1967-04-01), Vanderpoel
patent: 3498054 (1970-03-01), Theed
patent: 3672172 (1972-06-01), Hammond
patent: 3877222 (1975-04-01), Scherenberg
patent: 4085586 (1978-04-01), Shibata
patent: 4096692 (1978-06-01), Nakamura
patent: 5197282 (1993-03-01), Kume
patent: 5338903 (1994-08-01), Winberg
patent: 5339629 (1994-08-01), Winberg et al.

Affiliated with

Also associated with

Rating

Secondary air supply system for internal combustion engines does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1950639