The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 19, 2017
Filed:
Nov. 24, 2015
John R Bucknell, Royal Oak, MI (US);
Aymail Ismail, Westland, MI (US);
Ethan E Bayer, Lake Orion, MI (US);
Drushan Mavalankar, Rochester Hills, MI (US);
John R Bucknell, Royal Oak, MI (US);
Aymail Ismail, Westland, MI (US);
Ethan E Bayer, Lake Orion, MI (US);
Drushan Mavalankar, Rochester Hills, MI (US);
FCA US LLC, Auburn Hills, MI (US);
Abstract
A control technique for an engine having a two-step variable valve lift system includes a controller receiving a pressure in an intake manifold of the engine from a manifold absolute pressure (MAP) sensor and a position of an EGR valve of the engine from an exhaust gas recirculation (EGR) sensor. In response to the controller detecting an upcoming HL-to-LL valve state transition, a set of airflow actuators of the engine is controlled, based on the intake manifold pressure and the EGR valve position, to generate a first torque reserve. In response to generating the first torque reserve, the controller then commands the HL-to-LL transition and depletion of the first torque reserve during the HL-to-LL transition to mitigate torque disturbance associated with this transition.