Abstract: A cold start control module for a direct injection engine includes a fuel flow determination module and a cylinder activation/deactivation module. The fuel flow determination module determines a requested fuel flow. The cylinder activation/deactivation module deactivates at least one of cylinders when the requested fuel flow exceeds a maximum fuel flow of the fuel pump during cold start.

Abstract: An engine control system comprises an engine speed monitoring module and a pump control module. The engine speed monitoring module compares an engine speed and a predetermined threshold. The pump control module deactivates a pressure pump based on said comparison.

Abstract: A system comprises a torque control module, a combustion prediction module, and a fuel control module. The torque control module sets spark timing of an engine to produce a drive torque and determines an amount of delay to add to the spark timing to decrease the drive torque by a predetermined torque. The combustion prediction module predicts whether a single injection of fuel will combust in a cylinder of the engine when the amount of delay is added to the spark timing. The fuel control module actuates a plurality of separate injections of fuel into the cylinder when the combustion prediction module predicts that the single injection of fuel will not combust.

Abstract: A method and control module for operating an engine that includes a pressure range determination module that determines a pressure value for a pressure sensor in a fuel rail is out of range. A fuel rail pressure estimate module that determines a predicted pressure value. An engine control module that operates the engine using the predicted pressure value.

Abstract: A system comprises a torque control module, a combustion prediction module, and a fuel control module. The torque control module sets spark timing of an engine to produce a drive torque and determines an amount of delay to add to the spark timing to decrease the drive torque by a predetermined torque. The combustion prediction module predicts whether a single injection of fuel will combust in a cylinder of the engine when the amount of delay is added to the spark timing. The fuel control module actuates a plurality of separate injections of fuel into the cylinder when the combustion prediction module predicts that the single injection of fuel will not combust.

Abstract: An engine control system includes a starting module, a position module, and a deactivation module. The starting module determines when a crankshaft starts to rotate and activates a control valve of a fuel pump when the crankshaft starts to rotate. The position module determines a position of the crankshaft and determines a position of a camshaft based on the position of the crankshaft. The camshaft drives the fuel pump. The deactivation module deactivates the control valve when the position module determines the position of the camshaft.

Abstract: A method for controlling the operation of at least one fuel injector in a four stroke internal combustion engine is provided. The method includes the steps of initiating fuel injection into a combustion chamber during an expansion stroke of the engine, injecting fuel into the combustion chamber during an exhaust stroke of the engine, injecting fuel into the combustion chamber during an intake stroke of the engine, and terminating fuel injection into the combustion chamber during a compression stroke of the engine.

Abstract: An engine system comprises a temperature determination module, a temperature comparison module, and a fuel injection control module. The temperature determination module determines an engine temperature. The temperature comparison module compares the engine temperature and a temperature threshold. The fuel injection control module adjusts a timing of fuel injection from a first range of an intake stroke to a second range of the intake stroke based on the comparison. The first range and the second range do not overlap.

Abstract: An engine system comprises a temperature determination module, a temperature comparison module, and a fuel injection control module. The temperature determination module determines an engine temperature. The temperature comparison module compares the engine temperature and a temperature threshold. The fuel injection control module adjusts a timing of fuel injection from a first range of an intake stroke to a second range of the intake stroke based on the comparison. The first range and the second range do not overlap.

Abstract: A method and control module for operating an engine that includes a pressure range determination module that determines a pressure value for a pressure sensor in a fuel rail is out of range. A fuel rail pressure estimate module that determines a predicted pressure value. An engine control module that operates the engine using the predicted pressure value.

Abstract: A drive system comprises a shaft in rotational engagement with a crankshaft of an engine, the shaft including a first cam having a first quantity of lobes; and a second cam having a second quantity of lobes greater than the first quantity of lobes; and a selection mechanism to selectively engage a follower to one of the first cam or the second cam. A method comprises rotating a shaft having a first cam and a second cam; monitoring operating parameters of a vehicle; operating a fuel pump of the vehicle at a desired capacity based on the monitoring, including selectively engaging the fuel pump to one of the first cam and the second cam.

Abstract: A fuel injection method for internal combustion engines with gasoline direct fuel injection systems comprises receiving a crankshaft position signal from a crankshaft position sensor. A position of a crankshaft is determined from the crankshaft position signal. Fuel is commanded at a first rate when the position of the crankshaft is within a first selectable range during a combustion cycle of an engine cylinder and fuel is commanded at a second rate when the position of the crankshaft is within a second selectable range during the combustion cycle of the engine cylinder.

Abstract: The fuel injection system includes a fuel injector that injects fuel directly into a combustion chamber of a cylinder of an engine. The control module initiates multiple fuel injections in a combustion chamber during a combustion cycle of the cylinder via the fuel injector.

Abstract: An engine control system includes a starting module, a position module, and a deactivation module. The starting module determines when a crankshaft starts to rotate and activates a control valve of a fuel pump when the crankshaft starts to rotate. The position module determines a position of the crankshaft and determines a position of a camshaft based on the position of the crankshaft. The camshaft drives the fuel pump. The deactivation module deactivates the control valve when the position module determines the position of the camshaft.

Abstract: An engine control system comprises an engine speed monitoring module and a pump control module. The engine speed monitoring module compares an engine speed and a predetermined threshold. The pump control module deactivates a pressure pump based on said comparison.

Abstract: An engine control system includes a cam phaser that introduces a cam phase angle ? between a camshaft intake lobe and an associated crankshaft. An engine control module communicates with the cam phaser to introduce the cam phase angle ? while an engine is being started. The cam phase angle ? is selected such that the camshaft intake lobe opens an intake valve during at least a portion of a compression stroke of a cylinder that is associated with the camshaft intake lobe.

Abstract: A cold start control module for a direct injection engine includes a fuel flow determination module and a cylinder activation/deactivation module. The fuel flow determination module determines a requested fuel flow. The cylinder activation/deactivation module deactivates at least one of cylinders when the requested fuel flow exceeds a maximum fuel flow of the fuel pump during cold start.

Abstract: A fuel injection system for a direct fuel injection engine is provided. The system includes an injection mode module that selects a fuel injection mode to be one of a single injection mode and a dual injection mode during engine operation and a fuel injection command module that commands fuel injection events based on a crankshaft position, the fuel injection mode and a fuel percentage blending schedule.

Abstract: An engine control system includes a cam phaser that introduces a cam phase angle ? between a camshaft intake lobe and an associated crankshaft. An engine control module communicates with the cam phaser to introduce the cam phase angle ? while an engine is being started. The cam phase angle ? is selected such that the camshaft intake lobe opens an intake valve during at least a portion of a compression stroke of a cylinder that is associated with the camshaft intake lobe.

Abstract: A drive system comprises a shaft in rotational engagement with a crankshaft of an engine, the shaft including a first cam having a first quantity of lobes; and a second cam having a second quantity of lobes greater than the first quantity of lobes; and a selection mechanism to selectively engage a follower to one of the first cam or the second cam. A method comprises rotating a shaft having a first cam and a second cam; monitoring operating parameters of a vehicle; operating a fuel pump of the vehicle at a desired capacity based on the monitoring, including selectively engaging the fuel pump to one of the first cam and the second cam.