Title:
INTERNAL COMBUSTION ENGINE
Document Type and Number:
Japanese Patent JP2022124166
Kind Code:
A
Abstract:
To provide an internal combustion engine that positively introduces internal EGR for improved fuel efficiency and can also introduce both of the internal EGR gas and the fresh air to achieve its driving.SOLUTION: An internal combustion engine 1 has a variable phase mechanism (intake S-VT23, exhaust S-VT24). An intake cam lobe is formed such that an open period of the intake valve is 210° or larger and 330° or smaller of a crank angle (CA). The exhaust cam lobe is formed such that, during the maximum overlap period, an effective valve lift amount (Lift(CA)) of the exhaust valve 22, which is a function of a crank angle from the open timing (CAIVO) of the intake valve 21 to a middle timing (CAcenter) of the overlap period, an inner circumferential length (L_ex) of a valve seat, and a swept volume (V) per cylinder satisfy the following formula.SELECTED DRAWING: Figure 6
Inventors:
URUSHIBARA TOMONORI
SUEOKA KENYA
KAWAI YUSUKE
INOUE ATSUSHI
HIDAKA MASATOSHI
MATSUMOTO KOTA
TANII TOTA
KONO MICHIHARU
MIYAMOTO TORU
ITO TSUBASA
SUEOKA KENYA
KAWAI YUSUKE
INOUE ATSUSHI
HIDAKA MASATOSHI
MATSUMOTO KOTA
TANII TOTA
KONO MICHIHARU
MIYAMOTO TORU
ITO TSUBASA
Application Number:
JP2021021774A
Publication Date:
August 25, 2022
Filing Date:
February 15, 2021
Export Citation:
Assignee:
MAZDA MOTOR
International Classes:
F02D13/02; F02B23/10; F02M26/01
Attorney, Agent or Firm:
Patent Attorney Corporation Maeda Patent Office