US 12,259,128 B2
Multi-stage flame acceleration device and method for gas-fuel engine
Lei Zhou, Tianjin (CN); Qiang Gao, Tianjin (CN); Haiqiao Wei, Tianjin (CN); Zongkuan Liu, Tianjin (CN); Jianxiong Hua, Tianjin (CN); and Gequn Shu, Tianjin (CN)
Assigned to TIANJIN UNIVERSITY, Tianjin (CN)
Appl. No. 17/758,247
Filed by TIANJIN UNIVERSITY, Tianjin (CN)
PCT Filed Oct. 28, 2020, PCT No. PCT/CN2020/124414
§ 371(c)(1), (2) Date Jun. 30, 2022,
PCT Pub. No. WO2022/052238, PCT Pub. Date Mar. 17, 2022.
Claims priority of application No. 202010936966.1 (CN), filed on Sep. 8, 2020.
Prior Publication US 2023/0027612 A1, Jan. 26, 2023
Int. Cl. F02M 21/02 (2006.01); F23D 14/58 (2006.01); F23D 14/70 (2006.01)
CPC F23D 14/70 (2013.01) [F02M 21/0275 (2013.01); F23D 14/58 (2013.01); F23D 2207/00 (2013.01); F23D 2214/00 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A multi-stage flame acceleration device for a gas-fuel engine, the multi-stage flame acceleration device comprising:
a pressing piece, an upper chamber, a spark plug, a fuel ejector, a cooling device, and a flame acceleration nozzle, wherein the spark plug and the fuel ejector are mounted in the upper chamber;
the pressing piece is sleeved on an upper part of the upper chamber, and the multi-stage flame acceleration device is wholly and fixedly connected to a cylinder head through a step groove of the upper chamber;
a nozzle sealing ring, the flame acceleration nozzle, and a cylinder head sealing ring are mounted at a bottom of the upper chamber;
annular obstacles formed by a plurality of annular plates are arranged in a chamber of the flame acceleration nozzle;
the nozzle sealing ring is configured for sealing the upper chamber and the flame acceleration nozzle;
the cylinder head sealing ring is configured for wholly sealing the multi-stage flame acceleration device and the cylinder head; and
wherein the flame acceleration nozzle is configured to eject a first fuel with high reactivity and high laminar flow flame velocity to ignite a second fuel with low reactivity and low laminar flow flame velocity in a main combustion chamber.