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1. CN109519297 - Novel natural gas engine cylinder cover

Office China
Application Number 201910004538.2
Application Date 03.01.2019
Publication Number 109519297
Publication Date 26.03.2019
Publication Kind A
IPC
F02F 1/24
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
FCYLINDERS, PISTONS, OR CASINGS FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
1Cylinders; Cylinder heads
24Cylinder heads
CPC
F02F 1/24
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
FCYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
1Cylinders; Cylinder heads 
24Cylinder heads
F02F 1/242
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
FCYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
1Cylinders; Cylinder heads 
24Cylinder heads
242Arrangement of spark plugs or injectors
Applicants GUANGXI YUCHAI MACHINERY CO., LTD.
广西玉柴机器股份有限公司
Inventors ZHANG LEI
张雷
LUO WEI
罗威
SHI FENG
石峰
LI ZHUANG
李壮
ZHU ZAN
朱赞
Agents 南宁曙华知识产权代理事务所(特殊普通合伙) 45121
Title
(EN) Novel natural gas engine cylinder cover
(ZH) 一种新型天然气发动机气缸盖
Abstract
(EN)
The invention discloses a novel natural gas engine cylinder cover which comprises a cylinder cover body and a sparking plug installation protection sleeve. The cylinder cover body and the sparking plug installation protection sleeve are integrally formed. A sparking plug installation hole for installing a sparking plug is formed in the sparking plug installation protection sleeve, the bottom faceof the cylinder cover body is provided with an arc rotary cavity upwards, and the inner side of the arc rotary cavity adopts transition plane connection. The sparking plug installation hole is of a step hole structure, and the wall thickness from each section of the sparking plug installation hole to a water channel in the cylinder cover body is a fixed value. By means of the structure, fluidity of mixed gas of parking plug surrounding air and natural gas can be improved, residual waste gas around the sparking plug is reduced, diffused combustion is facilitated, and gas consumption is reduced.Gas fluidity of a bottom plate of the cylinder cover is enhanced, the temperature of a fire face is reduced, and the risk of cracking of the bottom plate of the cylinder cover is avoided. The sparking plug installation protection sleeve is uniform in wall thickness, local heat accumulation caused by wall thickness unevenness is avoided, the sparking plug installation thread portion is better in cooling effect, and the problem of high-temperature thread biting is avoided.

(ZH)
本发明公开了一种新型天然气发动机气缸盖,包括气缸盖,和气缸盖一体成型的火花塞安装护套,火花塞安装护套内设置用于安装火花塞的火花塞安装孔,气缸盖底面向上设置有弧形回转腔,弧形回转腔的内侧采用过渡平面连接;火花塞安装孔为阶梯孔结构,火花塞安装孔的每一个节段到气缸盖内的水道的壁厚均相同。该结构有利于火花塞周围空气与天然气的混合气体流动性提高,减少火花塞周围的残余废气,利于扩散燃烧,减少气耗;气缸盖底板气体流动增强降低了火力面的温度,避免气缸盖底板开裂风险。火花塞安装护套壁厚均匀,避免了壁厚不均引起的局部热量聚集,火花塞安装螺纹部位冷却效果更佳,避免了高温螺纹咬死问题。

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