Low-thermal-inertia intake ports for port-injected, spark...

Details Low-thermal-inertia intake ports for port-injected, spark... Low-thermal-inertia intake ports for port-injected, spark...

2008-04-22

2008-04-22

Cronin, Stephen K. (Department: 3747)

Internal-combustion engines

Cooling

Air-cooled

C123S041620, C123S310000, C123S041790

Reexamination Certificate

active

07360512

ABSTRACT:
The present invention provides an intake port design that provides a low thermal inertia characteristic, thereby decoupling the surface temperature of the intake port walls from that of the coolant through use of an air gap formed between the intake port and the cylinder head. At idle and part-throttle, the intake port is at a higher surface temperature yielding better cold-start emissions, better mixture preparation, and less dense intake charge (“thermal throttling”) for better fuel economy. At wide-open-throttle, the intake port is at a lower surface temperature yielding better volumetric efficiency for improved torque and reduction in knocking tendency enabling higher compression ratio for improved fuel economy and performance. The intake port design of the present invention can be manufactured with a hydroform manufacturing process resulting in improved dimensional consistency and smooth surface finish. Additionally, the process eliminates some cylinder head machining processes.

REFERENCES:
patent: 3989424 (1976-11-01), Goloff et al.
patent: 4182282 (1980-01-01), Pollet
patent: 4300494 (1981-11-01), Graiff et al.
patent: 4785773 (1988-11-01), Schreiber et al.
patent: 5099808 (1992-03-01), Matsuura et al.
patent: 5551385 (1996-09-01), Yoshida et al.
patent: 5842342 (1998-12-01), Strasser et al.
patent: 5875754 (1999-03-01), Ickinger
patent: 6729272 (2004-05-01), Iizuka et al.
patent: 7069884 (2006-07-01), Baba et al.
patent: 7191740 (2007-03-01), Baba et al.

Affiliated with

Also associated with

Rating

Low-thermal-inertia intake ports for port-injected, spark... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Low-thermal-inertia intake ports for port-injected, spark..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low-thermal-inertia intake ports for port-injected, spark... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2767715