Patent ID: 7458208
Filing Date: 2008-12-02
Classification: F01N,F02B,Y02T

Abstract:
1. An exhaust extractor system for reducing backpressure associated with an internal combustion engine comprising; an exhaust system having an exhaust tailpipe in fluid communication with said internal combustion engine at an upstream end thereof and having a downstream exhaust end opening to the environment, said exhaust tailpipe having a central longitudinal axis, an air scoop attached to a first end of a pressurized air pipe extending generally parallel to but not concentrically about said exhaust pipe, said pressurized air pipe having a downstream exhaust end opening at a second end to said environment, said pressurized air pipe having a central longitudinal axis; a crossover pipe having a first and second end with a central longitudinal axis extending diagonally of said central longitudinal axis of said exhaust pipe and said central longitudinal axis of said pressurized air pipe, said crossover pipe connected at a first end to said exhaust tailpipe and in fluid communication with said engine exhaust at an upstream end thereof relative said pressurized air pipe and disposed at an obtuse angle with respect to said pressurized air pipe so as to form a venturi effect on said tailpipe exhaust when the flow rate of gas in said pressurized pipe exceeds that of the tailpipe, said crossover pipe extending downstream of said first end connection and attached to and in fluid communication at the second end thereof to said pressurized air pipe near said downstream end of said pressurized air pipe; whereby a fraction of exhaust gas in said exhaust tailpipe is extracted through said crossover pipe and drawn into said pressurized air pipe and discharged out said downstream end opening of said pressurized air pipe.