- Patent Title: Piston of internal combustion engine and internal combustion engine
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Application No.: US17611420Application Date: 2020-06-30
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Publication No.: US11754017B2Publication Date: 2023-09-12
- Inventor: Yoshitaka Tsubaki , Yusuke Imamori , Satoshi Yamada , Shintaro Shuto , Taro Tamura
- Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
- Applicant Address: JP Sagamihara
- Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
- Current Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
- Current Assignee Address: JP Sagamihara
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JP 19125809 2019.07.05
- International Application: PCT/JP2020/025689 2020.06.30
- International Announcement: WO2021/006119A 2021.01.14
- Date entered country: 2021-11-15
- Main IPC: F02F3/28
- IPC: F02F3/28

Abstract:
A piston of an internal combustion engine configured to be reciprocable along an axial direction in a cylinder includes a cavity formed to be recessed in a center of a piston top surface, and an outer circumferential edge portion located on a radially outer side of the cavity in the piston top surface. The cavity includes a lip portion, a raised portion, and a curved portion. The curved portion includes an outer circumference-side curved surface which includes a curved surface connected to the lip portion, an inner circumference-side concave surface which is located on a radially inner side of an outer circumference-side curved surface and includes a surface connected to a raised portion, the inner circumference-side concave surface including a deepest portion of the cavity, and a convex surface formed between the outer circumference-side curved surface and the inner circumference-side concave surface, as well as protruding upward.
Public/Granted literature
- US20220213846A1 PISTON OF INTERNAL COMBUSTION ENGINE AND INTERNAL COMBUSTION ENGINE Public/Granted day:2022-07-07
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