Abstract: A method for thermal management of a motor vehicle engine includes one or more of the following: determining a current lube oil temperature; determining a lube oil temperature for optimal friction; turning on piston cooling jets based on the current lube oil temperature and the lube oil temperature for optimal friction; and turning off the piston cooling jets.

Abstract: A method for thermal management of a motor vehicle engine includes one or more of the following: determining a current lube oil temperature; determining a lube oil temperature for optimal friction; turning on piston cooling jets based on the current lube oil temperature and the lube oil temperature for optimal friction; and turning off the piston cooling jets.

Abstract: An engine system includes: a first throttle valve; a turbocharger compressor disposed downstream of the first throttle valve; a charge air cooler disposed downstream of the turbocharger compressor; a second throttle valve located downstream of the turbocharger compressor; a purge inlet located downstream of the first throttle valve and configured to introduce fuel vapor from a fuel tank into intake air; and an engine control module configured to: maintain the first throttle valve in a fully open position; and selectively close the first throttle valve relative to the fully open position in response to receipt of a request to at least one of: purge fuel vapor from the fuel tank; and at least one of decrease and prevent icing of the charge air cooler.

Abstract: An engine system includes: a first throttle valve; a turbocharger compressor disposed downstream of the first throttle valve; a charge air cooler disposed downstream of the turbocharger compressor; a second throttle valve located downstream of the turbocharger compressor; a purge inlet located downstream of the first throttle valve and configured to introduce fuel vapor from a fuel tank into intake air; and an engine control module configured to: maintain the first throttle valve in a fully open position; and selectively close the first throttle valve relative to the fully open position in response to receipt of a request to at least one of: purge fuel vapor from the fuel tank; and at least one of decrease and prevent icing of the charge air cooler.

Abstract: A system includes a fuel control module and a valve control module. The fuel control module controls a fuel injector to stop fuel delivery to each cylinder of an engine in a vehicle when the vehicle is decelerating. The valve control module controls a valve actuator to actuate intake and exhaust valves of each cylinder of the engine between open and closed positions when fuel delivery to each cylinder of the engine is stopped. The valve control module controls the valve actuator to adjust an amount of airflow through each cylinder of the engine to a minimum amount when fuel delivery to each cylinder of the engine is initially stopped. The valve control module controls the valve actuator to adjust the amount of airflow through each cylinder of the engine to an amount greater than the minimum amount before fuel delivery to each cylinder of the engine is restarted.

Abstract: A control system for a fuel cutoff system of a motor vehicle includes a fuel cutoff module that generates a fuel cutoff signal for disabling a supply of fuel to an engine, in response to the fuel cutoff module detecting a deceleration fuel cutoff (DFCO) event. The control system further includes an oxygen storage module determining an amount of oxygen accumulated in a catalyst and comparing this amount to an oxygen storage capacity (OSC) of the catalyst, in response to the fuel cutoff module determining the DFCO event. The control system further includes an intake valve timing module generating a phasing signal to actuate a plurality of cam phasers to reduce a flow rate of oxygen to the catalyst, in response to the fuel cutoff module determining the DFCO event and the oxygen storage module determining that the amount of oxygen stored in the catalyst is less than the OSC.

Abstract: A control system for a fuel cutoff system of a motor vehicle includes a fuel cutoff module that generates a fuel cutoff signal for disabling a supply of fuel to an engine, in response to the fuel cutoff module detecting a deceleration fuel cutoff (DFCO) event. The control system further includes an oxygen storage module determining an amount of oxygen accumulated in a catalyst and comparing this amount to an oxygen storage capacity (OSC) of the catalyst, in response to the fuel cutoff module determining the DFCO event. The control system further includes an intake valve timing module generating a phasing signal to actuate a plurality of cam phasers to reduce a flow rate of oxygen to the catalyst, in response to the fuel cutoff module determining the DFCO event and the oxygen storage module determining that the amount of oxygen stored in the catalyst is less than the OSC.

Abstract: Systems and methods are provided for avoiding intake air condensation. A thermal management system includes a propulsion system with an internal combustion engine and an electric machine. A power electronics system delivers power to the electric machine. A fluid circuit is configured to cool the power electronics system. Intake air of the internal combustion engine is circulated through an intake air heat exchanger. A controller operates the fluid circuit to collect heat from the power electronics system and to selectively deliver the heat to the intake air heat exchanger.

Abstract: A method of operating an engine having an intake manifold, an exhaust manifold, a crankshaft, a plurality of working cylinders each having at least one intake valve and at least one exhaust valve, and an exhaust gas recirculation conduit providing fluid communication between the intake manifold and the exhaust manifold. The method includes: while the engine is operating, in response to a no engine torque request, deactivating a number of the working cylinders such that none of the deactivated working cylinders are fired and no air is pumped through the deactivated working cylinders as the crankshaft rotates, operating at least one of the plurality of working cylinders that is not deactivated to pump air through the non-deactivated working cylinder, and controlling gas flow through the exhaust gas recirculation conduit to circulate air pumped through the non-deactivated working cylinder to the intake manifold.

Abstract: A tensioner assembly for an engine timing drive includes a tensioner with a tensioner body having a fastener opening and defining a cavity with a plunger opening. A plunger is disposed in the cavity and a removable pin restrains the plunger in the cavity. The plunger is configured to be biased out of the plunger opening when the pin is removed. A protuberance extends outward from the tensioner body and is adapted to receive an applied torque. The tensioner body is configured to pivot about a center axis of the fastener opening in response to a predetermined torque applied to the protuberance. A method of assembling an engine timing drive includes applying a predetermined torque to a protuberance of a tensioner that is pivotably mounted to a cylinder block to rotate the tensioner toward a rotatable device such that the tensioner applies a predetermined load to the rotatable device.

Abstract: An electrically driven compressor is used to supplement a turbocharger on an engine featuring cylinder deactivation to alleviate the shortcomings of a single turbocharger in order to extend the deactivated operating ranges. The electrically driven compressor is also operable to enhance transient boost development of a turbocharged engine.