Power plants – Internal combustion engine with treatment or handling of... – By means producing a chemical reaction of a component of the...
Patent
1988-08-30
1990-05-01
Hart, Douglas
Power plants
Internal combustion engine with treatment or handling of...
By means producing a chemical reaction of a component of the...
181231, 422180, F01N 328
Patent
active
049207466
DESCRIPTION:
BRIEF SUMMARY
CROSS REFERENCE TO RELATED APPLICATION(S)
This United States application stems from PCT International Application No. PCT/SE87/00107 filed Mar. 4, 1987.
The present invention relates to an exhaust system for combustion engines.
Previously known exhaust systems, for example as used in motor vehicles, include exhaust pipes, but also silencers. The exhaust pipe normally comprises of at least two tubular lengths, having a length and extension adapted to suit a certain type of vehicle. Between adjacently located end portions of the exhaust pipe lengths, a silencer is attached by means of clamping joints, usually including a U-shaped member, against which a clamping member can be secured by means of two nuts. It should also be mentioned, that a catalytic unit for purification of the exhaust fumes may be included in certain types of exhaust systems, attached correspondingly to a silencer between two adjacently located exhaust pipe lengths. For a motor vehicle having catalytic purification of the exhaust fumes, an exhaust system may thus include a first length of exhaust pipe extending from the exhaust manifold, a catalytic unit, a short length of exhaust pipe, a first silencer, a short length of exhaust pipe, a second silencer, and a final length of exhaust pipe. Such an exhaust system is manufactured adapted for use with regard to a certain type of vehicle, and can not be used for any other type of vehicle. As a result, numerous types of exhaust systems are manufactured/stored, each one adapted for use with regard to a specific car model, and there are also differences existing between the manufacturing year of certain car models.
There are a number of disadvantages related to these known types of exhaust systems, and a major disadvantage is obviously the large number of types that must be manufactured/stored, both with regard to lengths of exhaust pipes, types of silencers, and types of catalytic units. A further disadvantage is related to the large number of joints existing between included parts of an exhaust system, which result in sealing problems, and also points where damage occur, caused by fatigue or corrosion. The problem of damage caused by corrosion is accentuated in conventional types of exhaust systems, particularly during short distance travel, due to the formation of condensed liquid corrosive products, which remain within the exhaust system. Difficulties in separating joined parts may for example also result in that a part included in an exhaust system can not be removed for replacement when damage has occured, unless it is cut off, and as a result, also adjacently located parts of the exhaust system must be replaced. It is also well known, that installation of a new exhaust system, as replacement for an old and damaged system, often can not be carried out without access to gas welding equipment or similar type of heat source, since final adjustment by heating and bending of included exhaust pipe lengths is required. The fashion in which silencers and catalytic units extend outwardly from the exhaust pipe with a considerably larger cross-sectional area often also results in damage of same when driving across uneven ground, and in certain cases, the entire exhaust system is pulled loose or damaged. Catalytic units utilized for purification of the exhaust fumes are particularly easy to damage, since included thin ceramic elements should not be subjected to pressure or striking forces, and the costs involved for replacement of such a unit are considerably high.
The object of the present invention is to disclose an exhaust system which can be adaped to suit various requirements of use, and thus also various vehicle models. The exhaust system according to the present invention does not include previously used joining members, comprising only one individual length of pipe, and adaption to desired longitudinal configuration of extension can be carried out without access to a heat source. It is further possible to tune the counter-pressure required in an exhaust system to suit every individual type of
REFERENCES:
patent: 1341976 (1920-06-01), Fisher
patent: 2877860 (1959-03-01), Hoffar
patent: 3492098 (1970-01-01), DePalma
patent: 3775063 (1973-11-01), Grout
patent: 4022019 (1977-05-01), Garcea
patent: 4345430 (1982-08-01), Pallo
patent: 4530418 (1985-07-01), Currie
LandOfFree
Exhaust system for 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 Exhaust system for combustion engines, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Exhaust system for combustion engines will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-821470