US 11,655,777 B2
Parallel intake valve tumble flow engine
Christopher L. Wray, San Antonio, TX (US); Zainal Abidin, San Antonio, TX (US); Kevin L. Hoag, San Antonio, TX (US); Anthony S. Perkins, Shoreham-by-Sea (GB); Ian P. Gilbert, Shoreham-by-Sea (GB); and Marc C. Megel, Olathe, CO (US)
Filed by Southwest Research Institute, San Antonio, TX (US)
Filed on Sep. 7, 2021, as Appl. No. 17/468,016.
Prior Publication US 2023/0077310 A1, Mar. 9, 2023
Int. Cl. F02F 1/42 (2006.01); F02B 1/06 (2006.01)
CPC F02F 1/4235 (2013.01) [F02B 1/06 (2013.01)] 16 Claims
OG exemplary drawing
1. An engine comprising:
a multiple intake valve cylinder to accommodate a reciprocating piston and define a combustion chamber there-adjacent; and
an intake valve assembly with inlets to at least two intake valves of parallel arrangement for delivery of a spark-ignited fuel-air mixture to the combustion chamber, at least one of the inlets facilitating an angled, substantially non-perpendicular tumble flow of the fuel-air mixture to the chamber via a channel about the inlets that is angled at between about 20° and about 45° and that is of a reducing diameter from the at least one of the inlets to the other inlet for enhancing the tumble flow.