Provided is a fuel injection control device that controls a fuel injection amount at higher accuracy. The fuel injection control device includes: a base waveform acquisition section 823 that generates a control current S9 for controlling a fuel injector 400; an A/D converter 824 that acquires a drive current P for the fuel injector 400 (controlled based on the control current S9) at each of measurement timings t1 to t6 based on a counter cycle; and an arithmetic operation section 821 that, based on a drive current P1 at a first measurement timing t1 and a drive current P2 at a second measurement timing t2 later than the first measurement timing t1, both acquired by the base waveform acquisition section 823, predicts a drive current P3 at a third measurement timing t3 later than the second measurement timing. With this configuration, the arithmetic operation section 821 makes a comparison between a predicted electric power amount calculated based on the drive current P3 at the third measurement timing t3 that the arithmetic operation section 821 has predicted and a target electric power amount calculated based on a control current predetermined, so as to correct the control current S9.

A system and method for monitoring vehicle performance and updating engine control parameters, which provides a solution to the problem of tuning engine control parameters for a vehicle. The core components of the invention are an engine controller coupled to an interface device which communicates with a remote device. Generally speaking, the components are configured as follows: the engine controller receives signals from various sensors in a vehicle and the engine controller controls the engine based on engine control parameters and the signals from the sensors. The interface device monitors the engine control and sensor signals and transmits information to the remote device. The remote device receives the information and sends back updated engine control parameters. The interface device receives the updated engine control parameters and communicates with the engine controller to update the engine control parameters using the updated engine control parameters.

A system and method for monitoring vehicle performance and updating engine control parameters, which provides a solution to the problem of tuning engine control parameters for a vehicle. The core components of the invention are an engine controller coupled to an interface device which communicates with a remote device. Generally speaking, the components are configured as follows: the engine controller receives signals from various sensors in a vehicle and the engine controller controls the engine based on engine control parameters and the signals from the sensors. The interface device monitors the engine control and sensor signals and transmits information to the remote device. The remote device receives the information and sends back updated engine control parameters. The interface device receives the updated engine control parameters and communicates with the engine controller to update the engine control parameters using the updated engine control parameters.

Provided is an engine control device which controls at least an intake valve, an exhaust valve, and a fuel injection valve injecting a fuel into an intake pipe such that internal EGR is realized, in which timing of opening and closing of the intake valve is set to be later in comparison with a reference operation state which is a first operation state and timing of closing of the exhaust valve is set to be earlier in comparison with the reference operation state, and the fuel injection valve is caused to inject the fuel in a period which is: after a piston starts to rise which had been passed through a bottom dead center for the first time after an exhaust stroke is finished, which is followed by closing of the intake valve; and before the intake valve is opened.

An method for controlling an engine of a vehicle having the engine and a transmission may include communicating an air-controlled torque request signal between a transmission controller and an engine controller, adjusting an output torque of the engine by controlling an intake air amount of the engine based on the air-controlled torque request signal, communicating an ignition-and-fuel-controlled torque request signal between the transmission controller and the engine controller, determining a target torque value based on the ignition-and-fuel-controlled torque request signal, and adjusting the output torque of the engine by controlling an ignition timing and/or a fuel amount of the engine based on the target torque value.

A controller for an internal combustion engine, a control method for an internal combustion engine, and a memory medium are provided. The controller determines whether an execution request of a temperature-increasing process for an aftertreatment device for exhaust gas has been issued. When the execution request is determined as having been issued, supply of fuel by a fuel injection valve corresponding to a specified cylinder is deactivated. The specified cylinder is one of cylinders. An air-fuel ratio of air-fuel mixture in a cylinder of the cylinders that differs from the specified cylinder is set to be richer than a stoichiometric air-fuel ratio. When the temperature-increasing process is executed, an adjustment device is operated so as to reduce the fuel concentration in an intake port connected to the specified cylinder.

A fuel injection control apparatus including a microprocessor. The microprocessor is configured to perform calculating a target injection time, determining a first crank angle defining a start of fuel injection and a second crank angle defining an end of fuel injection, controlling a fuel injector in a first injection mode in which the fuel is injected for the first target injection time from a first time point corresponding to the first crank angle or a second injection mode in which the fuel is injected for the second target injection time from a second time point corresponding to a target crank angle, and the controlling including controlling the fuel injector so as to inject the fuel in the first injection mode first and in the second injection mode last when the fuel is injected multiple times between an intake stroke and a compression stroke.

Methods and systems are provided for adjusting multiplexed ignition signals in an engine system based on engine operating conditions, each cylinder of the engine system including a main chamber spark plug and a pre-chamber system. In one example, a method may include multiplexing spark signals to a first spark plug, a second spark plug, a third spark plug, and a fourth spark plug, the first spark plug coupled to a pre-chamber of a first cylinder, the second spark plug coupled to a pre-chamber of a second cylinder, the third spark plug coupled to a main chamber of the first cylinder, and the fourth spark plug coupled to the main chamber of the second cylinder. In this way, one ignition coil may be used to actuate two different spark plugs coupled to separate cylinders.

Methods and systems for real-time determination of volumetric efficiency for real-time control of air-fuel ratio for an internal combustion engine are provided. Sensors including Mass Air Flow (MAF) rate, Manifold Absolute Pressure (MAP), Manifold Intake Air Temperature (IAT), and engine RPM may be used to determine an actual air mass and theoretical maximum air mass for an engine cylinder during an intake stroke. This ultimately leads to the determination of engine Volumetric Efficiency (VE) may be determined in real-time based on the measured and calculated values for air mass, may provide VE information to an engine control system for real-time control of fuel system operation.

The present invention describes a fuel-management system for minimizing particulate emissions in turbocharged direct injection gasoline engines. The system optimizes the use of port fuel injection (PFI) in combination with direct injection (DI), particularly in cold start and other transient conditions. In the present invention, the use of these control systems together with other control systems for increasing the effectiveness of port fuel injector use and for reducing particulate emissions from turbocharged direct injection engines is described. Particular attention is given to reducing particulate emissions that occur during cold start and transient conditions since a substantial fraction of the particulate emissions during a drive cycle occur at these times. Further optimization of the fuel management system for these conditions is important for reducing drive cycle emissions.