US 6,202,409 B1Granted

Acoustically-enhanced intake/exhaust system and method for internal combustion engines

OwnerLloyd Taylorinventor

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Abstract

The acoustical system has a sound-producing transducer mounted in the exhaust pipe of the engine, at proximity of the exhaust port and oriented toward the exhaust port, for emitting and directing a sound pulse toward the exhaust port. The sound-producing transducer is operable for bouncing a first sound pulse off the piston wall during the expansion cycle and immediately before opening the exhaust port, for creating a low pressure zone at the exhaust port and for enhancing the evacuation of exhaust gases from the combustion chamber. A second sound pulse is emitted at every compression cycle of the engine and directed at the exhaust port immediately before closing the exhaust port. The combination of the first and second sound pulses at every rotation of the engine provides an efficient scavenging and plugging of the engine for increasing the performance of the engine.

Claims20

Dependent claims

In combination, an internal combustion engine having an ignition system, a cylinder, a piston movably mounted in said cylinder and adapted for movement along said cylinder, a piston-position sensing means associated with said piston for monitoring a position of said piston in said cylinder, an exhaust port through said cylinder at an intermediate region of said cylinder, an exhaust pipe extending from said exhaust port, and an acoustical system mounted on said internal combustion engine for enhancing a performance of said internal combustion engine, said acoustical system comprising:

a sound-producing transducer mounted in said exhaust pipe at proximity of said exhaust port, said sound-producing transducer having a sound-emission trajectory oriented toward said exhaust port and said cylinder, and
control means connected to said piston-position sensing means of said internal combustion engine and to said sound-producing transducer for controlling an operation of said sound-producing transducer relative to a timing of said internal combustion engine;
such that said sound-producing transducer is operable for reflecting a sound pulse off said piston when said piston is adapted to be moved across said exhaust port and prior to said piston passing by said exhaust port and opening said exhaust port, for enhancing an evacuation of exhaust gases from said cylinder through said exhaust port.

A method for enhancing the performance of an internal combustion engine having an ignition system, a cylinder, a piston movably mounted in said cylinder and adapted for movement along said cylinder, a piston-position sensing means associated with said piston for monitoring a position of said piston in said cylinder, an exhaust port through said cylinder in an intermediate region of said cylinder, an exhaust pipe extending from said exhaust port, and a sound-producing transducer mounted in said exhaust pipe at proximity of said exhaust port, said sound-producing transducer having a sound-emission trajectory oriented toward said cylinder and said exhaust port;

said method comprising the steps of:
emitting and directing a first sound pulse from said sound-producing transducer toward said cylinder and through said exhaust port when said piston moves over said exhaust port;
reflecting said first sound pulse off of said piston, and
immediately opening said exhaust port;
such that exhaust gases inside said cylinder are entrained through said exhaust pipe with a rebound of said first sound pulse.

2 more elements

A method for enhancing the performance of an internal combustion engine having a cylinder, a piston movably mounted in said cylinder and adapted for movement along said cylinder, a piston-position sensing means associated with said piston for monitoring a position of said piston in said cylinder, an exhaust port through said cylinder in an intermediate region of said cylinder for evacuating combustion gases from said cylinder, a transfer port through said cylinder for admitting a fuel mixture into said cylinder, said transfer port being located opposite said exhaust port relative to an axis of said cylinder and an exhaust pipe extending from said exhaust port, said method comprising the steps of:

providing a sound-producing transducer in said exhaust pipe at proximity of said exhaust port and orienting a sound-emission trajectory of said sound-producing transducer toward said exhaust port;
emitting and directing a first sound pulse from said sound-producing transducer through said exhaust port when said piston moves over said exhaust port;
reflecting said first sound pulse off said piston;
immediately opening said exhaust port;
entraining exhaust gases from said cylinder through said exhaust pipe with a rebound of said first sound pulse;
emitting and directing a second sound pulse from said sound-emitting transducer toward said exhaust port, and
immediately closing said exhaust port;
such that said cylinder is efficiently scavenged and stuffed for increasing a performance of said engine.

5 more elements

Dependencies are inferred from the claim text.