Methods and systems are provided for reducing port injection fuel errors by selectively reactivating a direct fuel injector. Responsive to an increase in driver demand received while delivering fuel to a cylinder via port injection only, wherein the increase in driver demand is received late in the port injection window, the port injection error is addressed by reactivating a direct injector on the same engine cycle and delivering at least a portion of the fuel mass corresponding to the error via the direct injector. Additionally, a portion of the fuel mass may be delivered by the port injector on the same engine cycle by extending the end of injection timing, if possible.

A method, implemented in one or more controllers in a vehicle, includes, in a presence of a propulsive demand of the vehicle that is driven by an engine and an electric machine, holding electric machine current at a predetermined magnitude and sweeping an angle, defined between a reference current and a reference Iq component, through a predetermined range. The method further includes operating the electric machine thereafter according to a resolver offset derived from a value of the angle corresponding to an Iq component crossing zero.

Methods and systems are provided for using a forced induction system as a source of compressed air to pressurize a portable pressure vessel for inflating tires. In one example, a method may include providing instructions to the operator to initiate the method which includes the operator coupling the portable pressure vessel to a connection port included on the induction passage of the induction manifold. Responsive to more than one operator input, a controller selectively opens a pick-up valve in the connection port, and operates a plurality of engine systems to boost pressure in the induction passage to fill the portable pressure vessel.

The subject matter disclosed herein relates to a system and method for engine control. In particular, a system, may utilize a variable valve timing device, modify a variable valve timing profile, monitor engine performance, and adjust operating parameters of the engine accordingly. Such a system, may enhance the response time of an engine during transient operation.

Methods and systems are provided for reducing port injection fuel errors by selectively reactivating a direct fuel injector. Responsive to an increase in driver demand received while delivering fuel to a cylinder via port injection only, wherein the increase in driver demand is received late in the port injection window, the port injection error is addressed by reactivating a direct injector on the same engine cycle and delivering at least a portion of the fuel mass corresponding to the error via the direct injector. Additionally, a portion of the fuel mass may be delivered by the port injector on the same engine cycle by extending the end of injection timing, if possible.

The invention concerns an engine assembly (1) comprising a turbocharged engine with at least one cylinder having first and second outlet passages, the first passage being connected to a first manifold (5) while the second passage is connected to a second manifold (7) of an exhaust system comprising a first duct (4) extending from the first manifold (5) and a second duct (6) extending from the second manifold (7). The turbine (2) is provided with a wheel housed in a main pressure-relieving passage, the first duct (4) opening into the main passage. The first outlet passage is provided with means (20) for actively closing during the exhaust phase of the engine and the second duct (6) opens into at least one internal branching portion (8) of the turbine (2), bypassing the main pressure-relieving passage.

A vehicle includes a transmission; a torque converter coupled to the transmission; a controller in communication with the transmission and the torque converter; a driver seat, a passenger seat, and a back seat coupled to the transmission; and sensors configured to detect user occupancy of the seats. The sensors are in communication with the controller. The controller is programmed to receive data from the sensors, determine an occupancy status based on the occupancy data, set an engine operating parameter of one of the transmission and the torque converter based on the occupancy status, and control one or both of the transmission and the torque converter to operate according to the parameter.

A supplemental fuel system includes a supplemental fuel tank, an electronic valve, a temperature sensor, and a controller. The supplemental fuel tank is configured to store a supplemental fuel configured to supplement a primary fuel used by an engine. The electronic valve is configured to be positioned between the supplemental fuel tank and an air supply system for the engine. The temperature sensor is configured to acquire temperature data regarding a temperature of the engine. The controller is configured to control the electronic valve such that the electronic valve is (i) closed to prevent the supplemental fuel from being provided to the air supply system in response to the temperature being less than a temperature threshold and (ii) open or openable to permit the supplemental fuel to be provided to the air supply system in response to the temperature being greater than the temperature threshold.

Methods and systems are provided for adjusting noise, vibration, and harshness (NVH) limits for a vehicle based on a number of occupants in the vehicle. In one example, a method may include responsive to detecting zero occupants, reducing NVH constraints for operating the vehicle and adjusting one or more vehicle operating parameters based on the reduced NVH constraints.

A method for an enhanced vehicle monitoring system that utilizes cameras and other sensors to determine the state of the interior and/or exterior of a vehicle is provided. The method comprises detecting that a driver has exited a vehicle. The method further comprises monitoring a state of the vehicle. The method further comprises determining based, at least in part, on the monitoring, if an object has been left in the vehicle unintentionally or if the vehicle has been left running unattended. The method further comprises, upon determining that the object has been left in the vehicle or the vehicle has been left running unattended, sending a notification to the driver.