An engine control method for a vehicle is provided. The method includes securing target control values for a plurality of control objects related to an air path in an engine and calculating operation amounts of actuators for the control objects. The operation amounts minimize an objective function including the sum of resultant object components obtained by summing, for a predetermined reference time, squares of a difference between the target control values and prediction model functions for the control objects. The actuators are then driven based on the calculated operation values.

An engine control method for a vehicle is provided. The method includes securing target control values for a plurality of control objects related to an air path in an engine and calculating operation amounts of actuators for the control objects. The operation amounts minimize an objective function including the sum of resultant object components obtained by summing, for a predetermined reference time, squares of a difference between the target control values and prediction model functions for the control objects. The actuators are then driven based on the calculated operation values.

Systems and methods may be configured for engine analysis and diagnostics. The system may include a computer including a hardware processor, memory and a user interface. The hardware processor may be in communication with the memory and user interface. The hardware processor may provide operations including to receive engine parameters including at least two of real-time information, analytics information and historical information according to a predefined cylinder configuration of an engine; extract a plurality of frequency ranges from the engine parameters according to the predefined cylinder configuration; compare the at least two of real-time information, analytics information and historical information; and display issue indicators on respective engine regions of an engine diagram having the predefined cylinder configuration and that are associated with engine issues corresponding to respective thresholds for the at least two of real-time information, analytics information and historical information of the plurality of engine parameter sources.

Systems and methods may be configured for engine analysis and diagnostics. The system may include a computer including a hardware processor, memory and a user interface. The hardware processor may be in communication with the memory and user interface. The hardware processor may provide operations including to receive engine parameters including at least two of real-time information, analytics information and historical information according to a predefined cylinder configuration of an engine; extract a plurality of frequency ranges from the engine parameters according to the predefined cylinder configuration; compare the at least two of real-time information, analytics information and historical information; and display issue indicators on respective engine regions of an engine diagram having the predefined cylinder configuration and that are associated with engine issues corresponding to respective thresholds for the at least two of real-time information, analytics information and historical information of the plurality of engine parameter sources.

A fuel pump system of a hybrid vehicle is provided. The fuel pump system prevents a fuel pump from continuing to operate when fuel is exhausted, whereby the fuel pump may be damaged. The pressure of fuel is measured in response to exhaustion of fuel, and when the pressure of fuel is low, fuel is circulated within the fuel pump instead of being supplied to the engine side, thereby preventing the fuel pump from being stuck due to frictional heat.

A fuel pump system of a hybrid vehicle is provided. The fuel pump system prevents a fuel pump from continuing to operate when fuel is exhausted, whereby the fuel pump may be damaged. The pressure of fuel is measured in response to exhaustion of fuel, and when the pressure of fuel is low, fuel is circulated within the fuel pump instead of being supplied to the engine side, thereby preventing the fuel pump from being stuck due to frictional heat.

Provided is a fuel injection control device that makes it possible to precisely estimate an amount of fuel remaining in an air intake passage at a start-up of an engine, and to precisely set an fuel injection amount during start-up operation. In the fuel injection control device of the present invention, in a process in which the engine is transferred from operation state to a stop state, engine stop information is acquired and stored in a nonvolatile memory, the engine stop information including, at least an information indicating whether the current engine stop is an intended stop accompanied by fuel cutting. During the start-up of the engine, judgement is made as to whether the last engine stop was the intended stop or not, based upon the engine stop information and a fuel injection amount during start-up operation is determined with reference to the result of the judgement.

A system includes an electronic fuel injection system of an engine, the electronic fuel injection system including an electronic governor control unit for controlling various functions of the engine.

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.

The disclosure provides a combustion abnormality detecting device, a combustion abnormality detecting method, and a non-transitory computer-readable storage medium, a misfire detection accuracy is increased by increasing a piezoelectric detection accuracy. A charge amplifier (210) outputting a voltage signal corresponding to a charge generated by a piezoelectric element (35) in response to a received pressure, a drift component extracting part (230) extracting a drift component of the piezoelectric element (35), a drift correcting part (250) generating a correction signal for removing the drift component based on the extracted drift component and feeding back the correction signal to an input side of the charge amplifier (210), and a misfire detecting part (400) performing misfire detection based on the correction signal are included.