Detroit Diesel Corporation

Brian Andrew Lewallen

Richard Michael Avery, Jr

Tomislav Ivo Golub

Matthew Thomas Baird

Ravishankar Ramamurthy

John Edward Longnecker

Leopold Super

Sameer Bhargava

Peter Zagone

William K Ahrens

A method and system for controlling engine temperature by derating torque output of the engine. The method and system operate in cooperation with an electronic control module which is programmable for controlling temperature in the engine by derating maximum engine torque output based on an engine temperature rate of change. This permits the derating to be finely tuned to maximize available torque.

Method and system for controlling engine temperature by engine derating

A control for an internal combustion engine that includes an exhaust gas recirculation system predicts at least one of the intake manifold temperature in EGR mode or an intake manifold pressure in EGR mode, but preferably both, during Boost mode operation. The predictions are relied upon to calculate an intake manifold critical temperate in EGR, at which condensation would occur. The control then compares the predicted temperate value with the calculated intake manifold critical temperature, and if the predicted value exceeds the calculated temperature, the control commands re-entry into exhaust gas recirculation mode.

Re-entry strategy from boost mode to EGR mode

A charge air intake system for a diesel engine () includes a first duct () and second bypass duct () having its upstream and downstream ends connected to the first duct and bypassing a charge air cooler () mounted in line with the first duct (). An EGR conduit () leads from the exhaust manifold to the bypass duct (). A turbo charger furnished charged air to the ducts where a proportioning valve () proportions air between the charge air cooler and the bypass duct.

Charged air intake system for an internal combustion engine

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.

Engine control based on exhaust back pressure

An internal combustion engine includes an intake manifold supplying charge air to the cylinders. An exhaust manifold conducts exhaust gas away from the cylinders. A turbocharger including a turbine has an exhaust gas inlet connected with the exhaust manifold and also includes a compressor having an air inlet and outlet. The compressor air outlet is connected to the intake manifold to pressurize charge air during high power levels of engine operation. An EGR bypass connected between the turbine exhaust gas inlet and the intake manifold recirculates a portion of the exhaust gases to the cylinders. An intake air bypass adapted to recirculate a portion of compressor outlet air back to the compressor air inlet to reduce compressor outlet pressure and aid EGR flow through the EGR bypass to the cylinders during high power operation of the engine is connected between the compressor air outlet and the compressor air inlet.

Growing community of inventors

Canton, MI, United States of America

Brian Andrew Lewallen