Fca US LLC

Ryan M Sturgeon

Kenneth E Hardman

Roger C Sager

James J Daley

Joseph M Dekar

Ronald A Yannone, Jr

Jeffrey P Wuttke

Luis Del Rio

Jeff Brand

John D Frederick

Jospeh B Unsworth

An internal combustion engine system includes an internal combustion engine, an air intake conduit, an exhaust system with a catalytic converter, a combined catalyst preheating/exhaust gas recirculation (EGR) system with a recirculation passage, a heating element, and a preheating/EGR valve configured to selectively allow flow through the recirculation passage, and an electric turbocharger assembly including a compressor and a turbine rotatably coupled by a shaft. A controller is configured to operate in (i) a catalyst preheating mode where the preheating/EGR valve is opened to allow intake air into the recirculation passage, and the electric turbocharger compressor is operated to force intake air through the recirculation passage and the heating element to rapidly heat the catalytic converter, and (ii) an EGR mode where the throttle is opened to allow intake air to flow into the engine, and the preheating/EGR valve is opened to allow exhaust gas into the recirculation passage.

Dual function catalyst preheating and EGR system

A control system for an engine comprising an electric turbocharger and a wastegate is presented. The system is configured to variably open and close to control the flow of exhaust gas in an exhaust system of the engine at a turbine of the electric turbocharger; and a controller that obtains parameters including an exhaust flow rate through the exhaust system. The controller uses the parameters to (i) determine a desired speed of the electric turbocharger to satisfy no flow of the exhaust gas through the turbine; (ii) command the electric turbocharger to rotate in a reverse direction at the desired speed to achieve no flow of the exhaust gas through the turbine; (iii) determine whether an exhaust gas treatment system (ETS) has reached a desired temperature; and (iv) command the electric turbocharger to rotate in a forward direction based on the ETS reaching the desired temperature.

Electric turbocharger emissions control

A vapor canister of an evaporative emissions (EVAP) system is configured to store fuel vapor evaporated from a liquid fuel housed in a fuel tank of a vehicle. A boost line is connected between a high-pressure side of a boost system of an engine and the vapor canister, a boost pressure control valve is disposed in-line along the boost line and configured to control an amount of boost pressure provided to the vapor canister, and a set of purge lines are connected between the vapor canister and at least one of the engine, an induction system of the engine, and an exhaust treatment system of the engine. A controller is configured to control the boost pressure control valve to control the boost pressure provided to the vapor canister to control an amount of fuel vapor forced from the vapor canister through at least one of the set of purge lines.

Boost-assisted purge flow techniques for evaporative emissions systems

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Rochester Hills, MI, United States of America

Ryan M Sturgeon