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公开(公告)号：US20180258884A1
公开(公告)日：2018-09-13
申请号：US15759495
申请日：2016-09-23
Applicant: MAZDA MOTOR CORPORATION , DENSO CORPORATION
Inventor： Takayuki Hikita , Masahisa Yamakawa , Tomonori Urushihara , Kazuhiro Nagatsu , Tatsuya Fujikawa , Takashi Youso , Takaaki Nagano , Yuuki Kawai , Toshifumi Hayami
CPC classification number: F02M23/10 , F02B23/0696 , F02B23/101 , F02B2023/085 , F02B2023/102 , F02B2023/103 , F02F3/26 , F02M61/18 , F02M61/1813 , F02M61/1826 , Y02T10/125 , Y02T10/146
Abstract: An engine includes: a piston including a cavity; a cylinder head configured so as to form a combustion chamber having a pent roof shape; a fuel injection valve configured to inject fuel in a period from a second half of a compression stroke until a first half of an expansion stroke; and a spark plug arranged at a position corresponding to an upper side of the cavity. Injection openings which are arranged in a circumferential direction surrounding a longitudinal axis of the valve and through each of which the fuel is injected in a direction inclined relative to the longitudinal axis by a predetermined angle is formed such that when a height of a ceiling of the combustion chamber at a position corresponding to an edge end portion of the cavity in an injection direction of the injection opening is large, the injection angle of the injection opening is large.
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公开(公告)号：US10280831B2
公开(公告)日：2019-05-07
申请号：US15759190
申请日：2016-09-23
Applicant: MAZDA MOTOR CORPORATION , DENSO CORPORATION
Inventor： Takayuki Hikita , Masahisa Yamakawa , Tomonori Urushihara , Kazuhiro Nagatsu , Tatsuya Fujikawa , Takashi Youso , Takaaki Nagano , Yuuki Kawai , Toshifumi Hayami
Abstract: An engine includes: a piston including a cavity; a cylinder head configured to form a combustion chamber having a pent roof shape; a fuel injection valve configured to inject fuel from a second half of a compression stroke until a first half of an expansion stroke; and a spark plug arranged at a position corresponding to an upper side of the cavity. Injection openings are arranged in a circumferential direction surrounding a longitudinal axis of the valve. The combustion chamber at a compression top dead center is divided into a plurality of fuel injection regions, located in respective injection directions of the injection openings, by vertical surfaces extending radially from the longitudinal axis through a middle between adjacent injection openings. When a volume of the fuel injection region located in the injection direction of the injection opening is large, an opening area of the injection opening is large.
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公开(公告)号：US10309294B2
公开(公告)日：2019-06-04
申请号：US15759495
申请日：2016-09-23
Applicant: MAZDA MOTOR CORPORATION , DENSO CORPORATION
Inventor： Takayuki Hikita , Masahisa Yamakawa , Tomonori Urushihara , Kazuhiro Nagatsu , Tatsuya Fujikawa , Takashi Youso , Takaaki Nagano , Yuuki Kawai , Toshifumi Hayami
Abstract: An engine includes: a piston including a cavity; a cylinder head configured so as to form a combustion chamber having a pent roof shape; a fuel injection valve configured to inject fuel from a second half of a compression stroke until a first half of an expansion stroke; and a spark plug arranged at a position corresponding to an upper side of the cavity. Injection openings which are arranged in a circumferential direction surrounding a longitudinal axis of the valve and through each of which the fuel is injected in a direction inclined relative to the longitudinal axis by a predetermined angle is formed such that when a height of a ceiling of the combustion chamber at a position corresponding to an edge end portion of the cavity in an injection direction of the injection opening is large, the injection angle of the injection opening is large.
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公开(公告)号：US20180252151A1
公开(公告)日：2018-09-06
申请号：US15759190
申请日：2016-09-23
Applicant: MAZDA MOTOR CORPORATION , DENSO CORPORATION
Inventor： Takayuki Hikita , Masahisa Yamakawa , Tomonori Urushihara , Kazuhiro Nagatsu , Tatsuya Fujikawa , Takashi Youso , Takaaki Nagano , Yuuki Kawai , Toshifumi Hayami
CPC classification number: F02B23/101 , F02B15/00 , F02B23/00 , F02B23/0672 , F02B23/10 , F02B75/12 , F02B2023/102 , F02B2023/103 , F02B2075/125 , F02M61/18 , F02M61/1806 , Y02T10/123 , Y02T10/125
Abstract: An engine includes: a piston including a cavity; a cylinder head configured to form a combustion chamber having a pent roof shape; a fuel injection valve configured to inject fuel from a second half of a compression stroke until a first half of an expansion stroke; and a spark plug arranged at a position corresponding to an upper side of the cavity. Injection openings are arranged in a circumferential direction surrounding a longitudinal axis of the valve. The combustion chamber at a compression top dead center is divided into a plurality of fuel injection regions, located in respective injection directions of the injection openings, by vertical surfaces extending radially from the longitudinal axis through a middle between adjacent injection openings. When a volume of the fuel injection region located in the injection direction of the injection opening is large, an opening area of the injection opening is large.
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