Detroit Diesel Corporation

Matthew Thomas Baird

Kevin Sisken

Amr Radwan

Bryant Pham

Mark Allen Zurawski

Jeffery Scott Hawkins

Jason Thomas Barton

Peter Zagone

Heather A Staley

Min Sun

Richard Michael Avery, Jr

Justin Adam Shetney

Tomislav Ivo Golub

David Joseph Dronzkowski

Zornitza Pavlinova Pavlova-MacKinnon

Frank S Groer

Brian Andrew Lewallen

Harald Wedler

Charles Chapin Blake

Reinhard Pfundt

Dennis J Grace

Miguel Menoyo-Alonso

Donald E Keski-Hynnila

Todd C Slater

Darren P Aherne

James Erik Plastow

In one embodiment, the present invention relates to a method to operate an internal combustion engine equipped with an Electronic Control Unit (ECU) with memory, an exhaust system including a Diesel Oxidation Catalyst (DOC), a Diesel Particulate Filter (DPF), upstream of a Selective Catalyst Reducer (SCR). A doser is in the DPF and actuated by commands from the ECU. The method includes sensors at the DPF and SCR electronically connected to the ECU to transmit data signals indicative of operating conditions at the DPF and SCR. The method includes sensing the temperature at an outlet of the DPF and an inlet at the SCR, determining whether that temperature is at least a predetermined temperature for a predetermined period of time, and introducing heat to the SCR to raise its temperature to a predetermined level for a predetermined period of time, such as light off temperature, to operate more efficiently. Heat may be introduced in the exhaust stream by engine thermal management strategies as well.

Method of operating an internal combustion engine to heat up a selective catalyst reducer

A method to operate a vehicle equipped with an electronic controlled internal combustion engine. The engine fan is used as a dynamic fan brake when the vehicle exceeds a minimum predetermined operating parameter for a predetermined period of time, and is disabled once the vehicle is operating within predetermined operating parameters.

System and method of fan control

A method of controlling dosing of a hydrocarbon fuel into the exhaust gas of a combustion engine upstream of a particulate filter when the exhaust gas temperature into an oxidation catalyst upstream of a particulate filter has dropped below the light-off temperature of the catalyst.

Engine after-treatment controls using dosing below catalyst light-off temperature

One embodiment of the invention includes a method of operating an internal combustion engine system comprising an engine, an oxidation catalyst, and a particulate filter, the method comprising: determining if the outlet temperature of exhaust gas from the oxidation catalyst is below a first temperature, measuring the time that the outlet temperature of exhaust gas from the oxidation catalyst is below the first temperature, determining if the measured time has exceeded a first time period, and if so, elevating the temperature of the exhaust gas exiting the oxidation catalyst.

Method of controlling hydrocarbon accumulation in a particulate filter under certain operating conditions

A method for cold start white smoke protection of a hydrocarbon after treatment device, and method of engine operation to effect the same. The method comprises a) determining the temperature of the hydrocarbon after-treatment device during cold start conditions; b) determining hydrocarbon emissions in the hydrocarbon after-treatment device; and c) modifying engine operating conditions to raise the hydrocarbon after-treatment temperature at a pre-determined rate to a temperature sufficient to permit controlled oxidation of the hydrocarbons in the hydrocarbon after treatment device.

Cold start white smoke aftertreatment protection

A method to detect drive cycles of a vehicle and modify engine operation according to the detected drive cycles to effect regeneration of exhaust components, particularly the Diesel Particulate Filter.

Method to operate vehicle with internal combustion engine and exhaust aftertreatment system according to detected drive cycles

A method to operate an electronically controlled internal combustion engine that recognizes when thermal management mode of operation is being applied to an engine but is not attaining desired exhaust temperature for aftertreatment. When the Engine Control System (ECS) recognizes that the engine in operating in thermal management mode in a futile effort, the ECS aborts thermal management mode and returns to normal operating mode.

Thermal management for an internal combustion engine to optimize diesel particulate filter regeneration events

A method to operate and electronic controlled internal combustion engine, and particularly a heavy duty diesel engine, to effect vane cleaning of a variable geometry turbocharger.

Variable geometry turbocharger extender idle vane cycle

A method for verifying the functionality of the components for a diesel particulate filter system based upon engine speed, engine torque, inlet and outlet exhaust pressure at the diesel particulate filter. Various sensor signals are compared to calibratable values in memory for a determination whether the diesel particulate filter system is functional.

Method for verifying the functionality of the components of a diesel particulate filter system

A system and method for controlling an internal combustion engine monitor exhaust back pressure and take remedial action when the exhaust back pressure exceeds a corresponding threshold. The system and method respond to increased exhaust back pressures attributable to various causes to alert the vehicle operator and/or engage engine protection mechanisms depending on the back pressure severity level in an effort to avoid engine/component damage. Fault timers are provided for tracking time fault conditions are present and time that faults are active, with active faults being latched for the current ignition cycle. Available engine torque may be reduced in response to excessive exhaust back pressure. Anti-tampering logic is provided to detect attempts to defeat the protection feature.

Growing community of inventors

Canton, MI, United States of America

Matthew Thomas Baird