公开(公告)号：US20190242294A1

公开(公告)日：2019-08-08

申请号：US16386259

申请日：2019-04-17

Applicant: Dalian University of Technology

Inventor： Wuqiang Long ,  Shuang He ,  Jiangping Tian ,  Hua Tian ,  Baoguo Du ,  Liyan Feng ,  Yao Fu ,  Ping Yi

IPC: F02B23/06 ,  F02F3/26 ,  F02F3/24

Abstract: A diesel engine includes a cylinder head, a cylinder sleeve, a piston, an injector, and a combustion chamber. The top side of the piston includes an annular top surface, an annular collision belt and an annular cavity. The collision belt includes a collision surface, an upper guide surface, and a lower guide surface. An annular throat is formed between the upper guide surface and the cylinder head. The collision belt divides the combustion chamber into a headspace and a central portion. The volume of the headspace is more than three times of the volume of the central portion. A major portion of the fuel jet injected by the injector is directed into the headspace. The results are faster mixing of fuel and air and complete combustion in the combustion chamber, and a reduction of fuel consumption rate by 2%. A method for fuel distribution and combustion is also disclosed.

公开(公告)号：US11746724B2

公开(公告)日：2023-09-05

申请号：US17310358

申请日：2019-12-17

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Liyan Feng ,  Min Pan ,  Wenjing Qu ,  Zhen Gong ,  Zhengran Yu ,  Hongjie Sun ,  Zixin Wang ,  Qiang Liu

IPC: F02F1/20 ,  F02F1/22 ,  F01M11/02

CPC classification number: F02F1/20 ,  F01M11/02 ,  F02F1/22

Abstract: Provided is a method for preventing the accumulation of cylinder oil at scavenging ports of low-speed marine engines. An oil passage is provided on a cylinder wall inside a cylinder. The oil passage includes multiple oil storage grooves processed in a circumferential direction of the cylinder wall. The oil passage is formed by obliquely extending from the inner side of the cylinder wall to the outside of the cylinder in a radial direction of the cylinder. The scavenging ports are uniformly distributed in a circumferential direction of the cylinder wall, and each of the oil storage grooves is correspondingly processed at an upper portion of the scavenging port upper edge of the scavenging port. Each of the oil storage grooves has a shape matching the curved surface of the scavenging port upper edge.

公开(公告)号：US10662866B2

公开(公告)日：2020-05-26

申请号：US16386259

申请日：2019-04-17

Applicant: Dalian University of Technology

Inventor： Wuqiang Long ,  Shuang He ,  Jiangping Tian ,  Hua Tian ,  Baoguo Du ,  Liyan Feng ,  Yao Fu ,  Ping Yi

IPC: F02B23/06 ,  F02F3/26 ,  F02F3/24

Abstract: A diesel engine includes a cylinder head, a cylinder sleeve, a piston, an injector, and a combustion chamber. The top side of the piston includes an annular top surface, an annular collision belt and an annular cavity. The collision belt includes a collision surface, an upper guide surface, and a lower guide surface. An annular throat is formed between the upper guide surface and the cylinder head. The collision belt divides the combustion chamber into a headspace and a central portion. The volume of the headspace is more than three times of the volume of the central portion. A major portion of the fuel jet injected by the injector is directed into the headspace. The results are faster mixing of fuel and air and complete combustion in the combustion chamber, and a reduction of fuel consumption rate by 2%. A method for fuel distribution and combustion is also disclosed.