Cummins Inc.

Cummins Engine Company, Inc.

W Patrick Niehus

John P Kresse

Andry Lesmana

Gregory H Henderson

Charles E Goode

Matthew W Workman

Tung-King See

Ross B Mursell

Brett D Griffith

Alex Pama

Methods and systems for estimating the loading of an air filter are disclosed herein. The method includes receiving upstream mass air flow data indicative of a mass air flow on an upstream side of an air filter (i.e., the 'dirty side of the filter'), receiving downstream air pressure data indicative of an air pressure on a downstream side of the air filter (i.e., the 'clean side of the filter'), and receiving downstream temperature data indicative of a temperature on the downstream side of the air filter. The method also includes determining a differential pressure (&#x394;P) across the air filter indicative of a loading of the air filter based on the upstream mass air flow data, the downstream air pressure data, and the downstream temperature data.

Methods and systems for monitoring loading of an air filter

Systems and methods are disclosed that relate to an SCR aftertreatment system and incentives/inducements for an operator/user to maintain the SCR aftertreatment in compliance with operating requirements and/or regulations. An engine is operationally coupled to at least one of a DEF tank and an SCR aftertreatment system. An inducement signal value is determined in response to a threshold value being obtained relating to at least one of the DEF tank level indication, a DEF quality indication, and an SCR aftertreatment system malfunction indication. The inducement signal value initiates at least one derate value of the engine to incentivize or induce the operator to have the aftertreatment system maintained and avoid or prevent out-of compliance operation of the SCR aftertreatment system.

SCR aftertreatment system maintenance inducement method

A road speed control system for a vehicle driven by an internal combustion engine includes a control computer operable to control engine fueling based on inputs from at least an accelerator pedal position sensor, a vehicle speed signal, and at least one control signal. According to one aspect of the invention, the control computer is responsive to a first control signal to decrease the maximum road speed limit value and to a second control signal to increase the maximum road speed value, to thereby provide a road speed limiting system operable under manual engine fueling conditions. According to another aspect of the invention, the control computer is responsive to at least one control signal to activate a maximum road speed limit override feature for temporarily increasing the maximum road speed limit value to, for example, facilitate passing attempts.

System for temporarily increasing maximum road speed of a vehicle driven by an internal combustion engine

System for controlling road speed of a vehicle driven by an internal

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Columbus, IN, United States of America

W Patrick Niehus