Gm Global Technolgoy Operations, Inc.

Ryan Calkin

Mark R Claywell

Maqsood Rizwan Ali Khan

Eric Darvin Thomas

A method for exhaust braking includes monitoring, by a controller of a vehicle, an engine speed of an internal combustion engine; comparing, by the controller, the engine speed with the a predetermined braking speed threshold to determine whether the engine speed is greater than the a predetermined braking speed threshold; and, in response to determining that the engine speed is greater than the a predetermined braking speed threshold, switching the vehicle to an exhaust braking mode.

Method for suggesting activation of an exhaust brake

A method and system for regulating an exhaust gas flow includes providing an engine and an exhaust system coupled to the engine, the exhaust system including a variable-geometry turbocharger and exhaust tubing including an exhaust pipe bellows and providing a controller and at least one sensor in communication with the controller, the at least one sensor configured to measure an engine speed of the engine. The method includes determining whether a first condition is satisfied and in response to satisfaction of the first condition, determining an exhaust gas temperature at the exhaust pipe bellows and determining a time delay for regulation of the exhaust gas flow to the variable-geometry turbocharger. The method includes controlling the exhaust gas flow to the variable-geometry turbocharger based on the determined time delay.

Methods and systems for regulating exhaust gas flow

An internal combustion engine, includes a turbocharger with a variable geometry turbine having an actuator shaft passing through the turbocharger housing. The actuator shaft opening is vented to the engine crankcase for diverting exhaust that passes through the actuator shaft opening to the crankcase instead of being released to the under-hood environment.

Growing community of inventors

Oak Park, MI, United States of America

Ryan Calkin