Methods and systems for operating an engine responsive to filtered cylinder pressure data are disclosed. In one example, fuel injection timing may be advanced in response to filtered cylinder pressure data that is indicative of onset of combustion in a cylinder being delayed from an expected timing. The filtered cylinder pressure data may be generated via a digital filter.

A method for safely capturing an engine RPM threshold in a spark-ignition internal combustion engine which may exceed the maximum safe unloaded RPM for that engine. Typical engines having a safe RPM high speed redline when coupled to a load, and a reduced RPM redline when decoupled and unloaded, can be set to activate ancillary equipment at a high redline, engine loaded RPM by deriving and processing data from the engine at a low, unloaded reduced RPM speed. The method requires operator reference to an existing OEM or after-market tachometer which enables the user to set a low RPM reference point while the engine is unloaded and running at a slow RPM. Raw data from the latter low RPM reference point selected by a user is safely captured to form a raw threshold while the engine is operating unloaded, and a higher RPM operating threshold is calculated and set from the raw threshold. The higher RPM operating threshold may exceed the maximum safe unloaded RPM for said engine.

A control system for an engine includes one or more processors configured to determine when a change in one or more of oxygen or fuel supplied to an engine. The one or more processors also are configured to, responsive to determining the change in oxygen and/or fuel supplied to an engine, direct one or more fuel injectors of the engine to begin injecting fuel into one or more cylinders of the engine during both a first fuel injection and a second fuel injection during each cycle of a multi-stroke engine cycle of the one or more cylinders.

Disclosed is a method for processing position data of an automotive vehicle motor, implemented by a multi-core electronic computer including: a software module for the production of data of angular position of the motor, and at least one software module for driving the motor as a function of the angular position data. The method includes a step of deactivation of each drive module by the module for the production of angular position data, followed by a step of activation of each drive module by the production module. In the course of the deactivation step, the production module dispatches to each drive module a deactivation command, and then a request for confirmation that each drive module is deactivated, and the step of activation of the drive modules is implemented only when the deactivation of all the drive modules has been confirmed to the production module.

A method of operating a vehicle, comprising: receiving ambient air information; receiving size, distance and relative velocity information about a vehicle in proximity to the vehicle; receiving road surface properties information; receiving wind velocity and direction information; computing an air density ratio factor using the ambient air information; computing an aerodynamic drag ratio factor using the size, distance and relative velocity information; computing a rolling resistance ratio factor using the information road surface properties information; computing effective velocity of the vehicle using the wind velocity and direction information; combining at least one of the air density ratio factor, the aerodynamic drag ratio factor and the rolling resistance ratio factor with vehicle loss coefficients to determining new vehicle loss coefficients; computing an energy loss or power loss of the vehicle using the new vehicle loss coefficients and the effective velocity of the vehicle; and controlling the vehicle to improve fuel economy.

In a variable valve control device, a variable valve control system and a method for controlling a variable valve mechanism according to the present invention, An ECM (201) transmits a phase detection value (RA1) computed based on a crank angle signal (CRANK) and a cam angle signal (CAM) to a VTC control unit (202) via a communication network (211), and VTC control unit (202) computes a phase detection value (RA2) based on a motor angle signal (MAS), controls a variable valve timing mechanism (114) based on phase detection value (RA2) in the transient state of an internal combustion engine, and controls variable valve timing mechanism (114) based on phase detection value (RA1) in the steady state of the internal combustion engine.

A device for controlling driving of a vehicle includes: a detector to acquire driving information, driver information, and surrounding environment information about the vehicle, and a controller to determine whether to activate a safety driving mode based on at least one of the driving information, driver information, and surrounding environment information about the vehicle, and to determine whether to maintain the safety driving mode state based on a vehicle state after the activation of the safety driving mode. Thus, the device may support a safety driving of the vehicle by restricting a speed of the vehicle even when the driver incorrectly operates an accelerator pedal in place of a brake pedal of the vehicle.

Systems and methods for controlling fuelling of dual fuel internal combustion engines are disclosed. The control techniques maximize the substitution rate of gaseous fuel for the liquid fuel by determining a target fuelling amount for the liquid fuel and then regulating an actual fuelling amount of the liquid fuel in response to engine speed and power variations and by modulating the flow rate of the gaseous fuel to the engine.

A first limit requesting process limits a dither control process of fuel injection valves in such a manner that the absolute value of the difference between the air-fuel ratios of the cylinders becomes smaller when the degree of variation of the injection amounts of the fuel injection valves provided for respective cylinders is great than when the degree of variation is small. A second limit requesting process limits the dither control process in such a manner that the absolute value is smaller when the torque fluctuation amount of the internal combustion engine is great than when the torque fluctuation amount is small. The limiting process limits the dither control process in accordance with one of requests generated by the first limit requesting process and the second limit requesting process that causes the absolute value to be smaller than the other.

A method for matching the performance of a plurality of electronic fuel injectors, includes: applying a supply voltage to a control module; applying an operating voltage signal having a pulse width to each of the plurality of electronic fuel injectors individually via the control module; measuring an amount of time that each of the plurality of electronic fuel injectors supplies fuel; individually adjusting an operating voltage supplied to each of the plurality of electronic fuel injectors to cause each of the electronic fuel injectors to deliver fuel for a substantially same amount of time.