(57) ABSTRACT A variety of methods and arrangements for reducing noise, vibration and
harshness (NVH) in a skip fire engine control system are described. In one aspect, a firing …

An internal combustion engine capable of cylinder deacti vation or skip fire control in
combination with variable valve lift control. One bank of cylinders can be deactivated while …

Methods, devices, estimators, controllers and algorithms are described for estimating the
torque profile of an engine and/or for controlling torque applied to a powertrain by one or …

In various described embodiments skip fire control is used to deliver a desired engine
output. A controller determines a skip fire firing fraction and (as appropriate) associated …

In one aspect, a method for controlling operation of an internal combustion engine is
described. The engine is operated in a skip fire manner such that selected skipped working …

In one aspect, a method for controlling operation of an internal combustion engine is
described. The engine is operated in a skip fire manner Such that selected skipped working …

Internal combustion engine having cam actuated valves that can be controlled to facilitate
the use of different air charge levels in different cylinders or sets of cylinders are described …

Abstract Systems and methods are described for mitigating vehicle vibration through the
control of a variable spring absorber that is part of a powertrain that includes the engine. In …

Abstract Systems and methods are provided for increasing the accuracy of air charge
estimation for a cylinder that is selectively deactivatable. A controller may deactivate the …

Abstract Systems and methods for reducing noise or vibration generated by an internal
combustion engine are described. An engine controller is arranged to operate the working …