Dynamic enhancement of EGR flow in an internal combustion engine

Details Dynamic enhancement of EGR flow in an internal combustion engine Dynamic enhancement of EGR flow in an internal combustion engine

1994-06-23

1996-07-09

Wolfe, Willis R.

Internal-combustion engines

Charge forming device

Exhaust gas used with the combustible mixture

606052, F02M 2507, F02G 300

Patent

active

055334873

ABSTRACT:
An exhaust gas recirculation system for a turbocharged internal combustion engine utilizes dynamic forces to enhance exhaust gas flow through the EGR system. An impact tube is disposed facing upstream in the exhaust tract of the engine to increase the static pressure by the dynamic pressure of the flow. The EGR outlet to the engine air intake tract is disposed about an intake air tube to create an annular exhaust passage thereabout which opens into a radially outwardly stepped wall of the intake tract thereby creating a low pressure region at the exit from the EGR system. Still further, the intake tract housing is provided with an arcuate radially diverging wall surface so that the exhaust gas follows the wall in accordance with the Coanda principle and induces increased flow through the intake tract from the turbocharger.

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"History of the Internal Combustion Engine" American Society of Mechanical Engineers, pp. 53-55, Oct. 15-18, 1989.
"Camaro, Malibu, Monte Carlo, Nova Service Manual" No. ST-329-79, General Motors Corp., Jan. 1979, pp. 6E-6, 6E-9.
"Intake Aerodynamics" Seddon and Goldsmith pp. 32-37, Jan. 1985.

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