A motor control device includes: a rotation control determination unit configured to determine whether a motor rotation control to rotate the motor fails; a parameter calculation unit configured to calculate a control failure frequency parameter having a correlation with a frequency of failure in the motor rotation control based on a determination result by the rotation control determination unit; an abnormality determination unit configured to determine whether an abnormality has occurred in the motor based on the control failure frequency parameter; and a stop suppression unit configured to suppress stop of rotation of the motor by changing a motor control parameter to perform the motor rotation control when the abnormality determination unit determines that an abnormality has occurred in the motor.

A method for detecting a misfiring cylinder is characterized by: performing frequency analysis on a torsional vibration signal from an internal-combustion engine system to extract an amplitude and a phase of a fundamental frequency component; comparing the amplitude of the fundamental frequency component with the amplitude of the torsional vibration signal to determine whether misfiring has occurred; calculating, when the misfiring is determined to occur, an explosion angle of a misfiring cylinder by using crank angle displacement at which the fundamental frequency component has a maximum value, and a phase of a fundamental frequency component with excitation force; and comparing the calculated explosion angle with an explosion angle of explosion order to detect the position of the misfiring cylinder.

The present disclosure provides systems and methods for monitoring and correcting a condition of an engine. A system for monitoring an engine comprises a plurality of sensors each coupled to a cylinder of the engine and configured to detect pressure data from each cylinder, a controller coupled to the sensors and configured to receive the pressure data and a monitor coupled to the controller for displaying the pressure data. The controller comprises a processor and a computer-readable data storage device. The storage device stores program instructions that, when executed by the processor, stores the pressure data captured by the controller and parses or combines this data into at least one parameter that represents the condition of the engine and/or summarizes one or more issues that may affect engine performance. This provides valuable information to the user(s) in real time, allowing the user(s) to make immediate correction actions to the engine.

The present disclosure provides systems and methods for monitoring and correcting a condition of an engine. A system for monitoring an engine comprises a plurality of sensors each coupled to a cylinder of the engine and configured to detect pressure data from each cylinder, a controller coupled to the sensors and configured to receive the pressure data and a monitor coupled to the controller for displaying the pressure data. The controller comprises a processor and a computer-readable data storage device. The storage device stores program instructions that, when executed by the processor, stores the pressure data captured by the controller and parses or combines this data into at least one parameter that represents the condition of the engine and/or summarizes one or more issues that may affect engine performance. This provides valuable information to the user(s) in real time, allowing the user(s) to make immediate correction actions to the engine.

An in-vehicle device is an in-vehicle device mounted on a vehicle and to provide with a driving unit, the device including: a control unit controlling the driving unit; and a communication unit for communicating with an in-vehicle ECU to be mounted on the vehicle, in which when an inhibition event for inhibiting diagnosis processing of the driving unit is detected at the time of performing the diagnosis processing, the control unit outputs a detection result notification indicating that the inhibition event is detected to the in-vehicle ECU through the communication unit.

Various methods and systems are provided for a multi-fuel capable engine. The system includes a liquid fuel system to deliver liquid fuel to an engine, a gaseous fuel system to deliver gaseous fuel to the engine, and a control system. The control system can control and test the liquid and gaseous fuel systems.