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1.发明申请公开(公告)号：US20190112995A1
公开(公告)日：2019-04-18
申请号：US16088860
申请日：2017-03-30
Applicant: GUANGZHOU AUTOMOBILE GROUP CO., LTD.
Inventor： Yu He , Xuetong Lian , Sicong Lin , Jujiang Liu
IPC: F02D41/18
Abstract: A method for calculating Atkinson cycle intake flowrate of an internal combustion engine includes determining an intake stopping point and an engine crank angle corresponding to a piston position of the internal combustion engine at the intake stopping point; calculating mass and partial pressure of an exhaust gas and a fresh gas within a cylinder from the engine crank angle; obtaining a mass ratio of a quantity of gas pushed out of the cylinder by a piston to a total quantity of gas within the cylinder at the intake stopping point during a period of time starting from the intake stopping point until intake valve closure; and calculating intake flowrate of the fresh gas within the cylinder at the intake valve closure from the mass ratio obtained. Also disclosed is a system for calculating Atkinson cycle intake flowrate of an internal combustion engine.
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2.发明授权公开(公告)号：US10648418B2
公开(公告)日：2020-05-12
申请号：US16088860
申请日：2017-03-30
Applicant: GUANGZHOU AUTOMOBILE GROUP CO., LTD.
Inventor： Yu He , Xuetong Lian , Sicong Lin , Jujiang Liu
Abstract: A method for calculating Atkinson cycle intake flowrate of an internal combustion engine includes determining an intake stopping point and an engine crank angle corresponding to a piston position of the internal combustion engine at the intake stopping point; calculating mass and partial pressure of an exhaust gas and a fresh gas within a cylinder from the engine crank angle; obtaining a mass ratio of a quantity of gas pushed out of the cylinder by a piston to a total quantity of gas within the cylinder at the intake stopping point during a period of time starting from the intake stopping point until intake valve closure; and calculating intake flowrate of the fresh gas within the cylinder at the intake valve closure from the mass ratio obtained. Also disclosed is a system for calculating Atkinson cycle intake flowrate of an internal combustion engine.
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