초록 ▼

An intake valve lift control system for optimizing both rotational movement and inducted flow of a mixture inducted into the chambers of an internal combustion engine. The combustion chamber includes a mask partially surrounding the intake valve seat thereby imparting rotational movement to the indu

An intake valve lift control system for optimizing both rotational movement and inducted flow of a mixture inducted into the chambers of an internal combustion engine. The combustion chamber includes a mask partially surrounding the intake valve seat thereby imparting rotational movement to the inducted mixture. During light load engine operating conditions, maximum valve lift displacement is limited to the height of the mask such that rotational movement of the inducted mixture is maximized during the entire intake stroke of the intake valve. During heavy load engine operating conditions in which optimal flow is desire, maximum valve lift displacement is extended beyond the mask such that flow, rather than rotational movement, is optimized. Commencement of valve lift is also delayed during normal engine operations such that rotational movement of the inducted mixture is further optimized.

대표청구항 ▼

An apparatus for controlling volume of flow per unit of time of a combustible mixture inducted into a combustion chamber of an internal combustion engine and also controlling rotational movement of the combustible mixture within the combustion chamber, comprising: a cylinder head forming a top porti

An apparatus for controlling volume of flow per unit of time of a combustible mixture inducted into a combustion chamber of an internal combustion engine and also controlling rotational movement of the combustible mixture within the combustion chamber, comprising: a cylinder head forming a top portion of the combustion chamber, said cylinder head having an intake valve opening formed therein for receiving the combustible mixture; an intake valve coupled to said cylinder head for sealing and unsealing said valve opening; a mask downwardly extending from said cylinder head a predetermined height and partially surrounding said valve opening; displacement means coupled to said intake valve for axially displacing said intake valve through a profile having a peak axial displacement which is provided in response to a control means; and said control means being coupled to said displacement means and responsive to engine operating parameters for limiting said peak axial displacement to a first maximum axial displacement no greater than said predetermined height of said mask for optimizing rotational movement of the combustible mixture, said control means also extending said peak axial displacement to a second maximum axial displacement beyond said peak height for optimizing flow rate of the combustible mixture in response to said engine operating parameters.