Internal-combustion engines – Intake manifold – Manifold tuning – balancing or pressure regulating means
Utility Patent
1999-08-04
2001-01-02
Dolinar, Andrew M. (Department: 3747)
Internal-combustion engines
Intake manifold
Manifold tuning, balancing or pressure regulating means
C123S184580
Utility Patent
active
06167857
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to an induction apparatus for internal combustion engines, and more specifically to a timed tube induction system to improve the performance of internal combustion engines.
A tuned tube injector is shown in U.S. Pat. No. 4,457,267 to Gorr. This patent shows a tube which captures the backflow combustion mixture gases at the reed valve and diverts these gases through a one-way check valve and then injects these gases into the incoming air stream ahead of the carburetor. The check valve is necessary in the feedback tube to prevent incoming air from bypassing the carburetor.
SUMMARY OF INVENTION
A timed tube induction system according to the present invention is located at the downstream side of the carburetor in fluid communication with an induction hose between the carburetor and the intake manifold of an internal combustion engine having an intake valve. A gas capture end of the tube is located adjacent the intake valve and attached to the intake manifold to capture the backflow combustion mixture gases when the intake valve closes. The backflow gases flow through the tube and are injected into the fuel-air mixture exiting the carburetor at an injector end of the tube. The injector end of the tube is mounted to the induction hose to provide an acute angle between gas flowing along the centerline of the tube and gas flowing along the centerline of the induction hose to increase the velocity of gas flowing toward the intake manifold. The tube is adjustable in length so that the pulsating air flow in the tube can be timed with the opening of the intake valve over a broad range of engine rpm.
REFERENCES:
patent: 3177973 (1965-04-01), Benes
patent: 3209532 (1965-10-01), Morris et al.
patent: 4457267 (1984-07-01), Gorr
patent: 4512311 (1985-04-01), Sugiyama
patent: 4628880 (1986-12-01), Aoyama et al.
patent: 4682571 (1987-07-01), Kaufman et al.
patent: 4848281 (1989-07-01), McCord
patent: 4952182 (1990-08-01), Curtis et al.
patent: 5129367 (1992-07-01), Lee et al.
patent: 5680839 (1997-10-01), Moore
Coleman Shane P.
Dolinar Andrew M.
Dorsey & Whitney LLP
Harris Katrina B.
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