Fca US LLC

Michael Barkey

William P Attard

Jeongyong Choi

Filip Vucak

Tyler Tutton

Shuonan Xu

David A Lawrence

Shu Wang

A control system for an engine comprising a turbocharger includes, a cold light off catalyst (CLOC), a CLOC valve, and a controller. The CLOC is positioned in a bypass passage around a turbine of the turbocharger. The CLOC valve selectively routes exhaust flow from the engine between the turbine and the CLOC. The controller is configured to command the CLOC valve to operate in a CLOC mode whereby exhaust flow is routed to the CLOC; determine, based on operation in the CLOC mode, a position of the CLOC valve; determine, based on the position of the CLOC valve, an available torque of the engine; and set a maximum available engine torque based on the determined available torque of the engine.

System and method for determining available engine torque based on cold light off catalyst

A system and method of controlling a powertrain to protect a high voltage cable by determining a temperature characteristic for a busbar, determining a temperature characteristic adjacent to a component, and determining a current through the high voltage cable. Thereafter, the method reduces an operating characteristic of the powertrain based on the temperature characteristic for the busbar, the temperature characteristic adjacent to the component, and the current.

High voltage harness thermal monitor and power management system

A control system for an engine comprising a turbocharger includes a cold light off catalyst (CLOC), a CLOC valve, and a controller. The CLOC is positioned in a bypass passage around a turbine of the turbocharger. The CLOC valve selectively routes exhaust flow from the engine between the turbine and the CLOC. The controller is configured to determine an engine torque request; determine an intake manifold pressure target; determine whether an intake manifold pressure target is greater than a barometric pressure; command the CLOC valve to a first position whereby exhaust flow is routed, at least partially, to the CLOC in a CLOC mode based on the intake manifold pressure target is not greater than the barometric pressure; and command the CLOC valve to a second position whereby exhaust flow is routed fully to the turbocharger based on the intake manifold pressure target is greater than the barometric pressure.

Control of cold light off catalyst

A control system for an engine comprising a turbocharger includes a cold light off catalyst (CLOC), a CLOC valve, and a controller. The CLOC is positioned in a bypass passage around a turbine of the turbocharger. The CLOC valve selectively routes exhaust flow from the engine between the turbine and the CLOC. The controller is configured to command the CLOC valve to a first position whereby exhaust flow is routed to the CLOC in a CLOC mode; determine, based on operation in the CLOC mode, a pressure of the turbine of the turbocharger; compare the determined pressure to a pressure threshold; determine a target position of the CLOC valve to mitigate oil leakage from the turbocharger during CLOC operation; and command the CLOC valve to the target position.

Turbocharger incorporating cold light off catalyst and valve positioning control

A control system for an engine comprising a turbocharger includes a cold light off catalyst (CLOC), a main catalyst, a CLOC valve, and a controller. The CLOC is positioned in a bypass passage around a turbine of the turbocharger. The main catalyst is disposed downstream of the turbine and the CLOC. The CLOC valve selectively routes exhaust flow from the engine between the turbine and the CLOC. The controller determines whether a temperature of the main catalyst is less than a threshold; commands a CLOC mode wherein the CLOC valve routes at least some exhaust to the CLOC based on the temperature being less than the threshold; determines whether a boost is requested at the engine; determines whether a full turbine input is needed to satisfy the requested boost; and disables the CLOC mode based on a determination that a full turbine input is needed.

Control of a cold light off catalyst to minimize tailpipe emissions

A control system for an engine comprising a turbocharger includes a cold light off catalyst (CLOC), a main catalyst, a CLOC valve, a first and second oxygen sensor, and a controller. The CLOC is positioned in a bypass passage around a turbine of the turbocharger. The CLOC valve selectively routes exhaust flow from the engine between the turbine and the CLOC. The first oxygen sensor is disposed between the CLOC valve and the CLOC. The second oxygen sensor is disposed between the CLOC and the main catalyst. A position of the CLOC valve is determined and a priority is assigned to one of the first and second signals of the oxygen sensors based on the position of the CLOC valve. An engine out lambda is determined based on the first and second signals and assigned priority. An engine parameter is commanded.

Closed loop fuel control with a cold light off catalyst dual path system

A control system for an engine comprising a turbocharger includes a throttle valve, a cold light off catalyst (CLOC), a CLOC valve, and a controller. The CLOC is positioned in a bypass passage around a turbine of the turbocharger. The CLOC valve selectively routes exhaust flow from the engine between the turbine and the CLOC. The controller is configured to command the CLOC valve to a first position whereby exhaust flow is routed to the CLOC in a CLOC mode; determine, based on operation in the CLOC mode, a pressure drop within the turbocharger; and command the actuator to move resulting in increased airflow into the engine while in the CLOC mode.

Modeling compressor pressure drop for turbocharger incorporating cold light off catalyst

A control system for an engine comprising a turbocharger includes a cold light off catalyst (CLOC), a CLOC valve, an oil control valve and a controller. The CLOC is positioned in a bypass passage around a turbine of the turbocharger. The CLOC valve selectively routes exhaust flow from the engine between the turbine and the CLOC. The oil control valve regulates lubrication oil from the engine to the turbocharger. The controller is configured to command the CLOC valve to a first position whereby exhaust flow is routed to the CLOC in a CLOC mode; determine, based on operation in the CLOC mode, a pressure of the turbine of the turbocharger; compare the determined pressure to a pressure threshold; determine a target position of the oil control valve to mitigate oil leakage from the turbocharger during CLOC operation; and command the oil control valve to the target position.

Turbocharger incorporating oil shutoff control based on a cold light off catalyst

Techniques for controlling a forced-induction engine having a low pressure exhaust gas recirculation (LPEGR) system comprise determining a desired differential pressure (dP) at an inlet of a boost device based on an engine mass air flow (MAF) and a speed of the engine, wherein the engine further comprises a dP valve disposed upstream from an EGR port and a throttle valve disposed downstream from the boost device, determining a desired EGR mass fraction based on at least the engine MAF and the engine speed, determining a maximum throttle inlet pressure (TIP) based on the engine speed, the desired EGR mass fraction, and a barometric pressure, and performing coordinated control of the dP valve and the throttle valve based on the desired dP and the maximum TIP, respectively, thereby extending EGR operability to additional engine speed/load regions and increasing engine efficiency.

Spark ignited engine load extension with low pressure exhaust gas recirculation and delta pressure valve

A control system and method utilize an exhaust oxygen (O2) sensor and a controller configured to operate a turbocharged engine in a scavenging mode, and while the operating the engine in the scavenging mode: command a target in-cylinder air/fuel ratio (FA) for achieving a target exhaust gas FA, adjust the measurement of the exhaust O2 sensor based on a scavenging ratio and the target in-cylinder FA to obtain a modified O2 concentration, adjust an exhaust system temperature modeled by a thermal model to obtain a modified exhaust system temperature, and adjust the target in-cylinder FA based on the modified O2 concentration and the modified exhaust system temperature.

Growing community of inventors

Maidstone, Canada

Michael Barkey