The present invention relates to a method for diagnosing sticking in a cylinder deactivation apparatus, the method comprising: an intake valve sticking determining step of determining whether the intake valve is stuck closed or stuck open by detecting the amount of variation of intake pressure in each intake manifold cylinders in an operation-off mode of the cylinder deactivation apparatus and comparing the amount of variation with a predetermined value; and an exhaust valve sticking determining step of determining whether the exhaust valve is stuck closed or stuck open by detecting the state of the air-fuel ratio in exhaust gas if it is determined whether the intake valve is stuck closed or stuck open in the intake valve sticking determining step, thereby sensing the stuck closed or the stuck open state of the intake valve and the exhaust valve so as to diagnose failure of the cylinder deactivation apparatus.

A vehicle environmental compliance system includes: an onboard diagnostic (OBD) tool configured to obtain OBD data from a vehicle's onboard diagnostics; an application for storage on a mobile computing device in communication with the OBD tool, the application configured to process the OBD data to form processed OBD data; a compliance center or server for receiving the process the OBD data from the application, the compliance center or server configured to further process the processed OBD data to form further processed OBD data; and wherein one of the processed OBD data or the further processed OBD data includes a result of OBD data subjected to a compliance evaluation routine, and wherein the system maintains a triggering algorithm that determines when the compliance evaluation routine is performed.

Methods and systems are provided for indicating whether a wastegate positioned in a vehicle exhaust system is stuck in a closed or open configuration. In one example, a method comprises activating an electric air compressor positioned in an intake of the engine and obtaining a first baseline air flow and a second baseline air flow in the exhaust system, and in response to an indication that the wastegate is potentially stuck open or closed, obtaining a test air flow measurement via activating the electric air compressor and comparing the test air flow in the exhaust system to the first and/or the second baseline air flow. In this way, the wastegate may be diagnosed under conditions of limited engine operation, such as that which may occur in hybrid electric vehicles.

In the communication interruption state in which the transmission of a drive control command value DUTY from an engine control unit (ECU) 1 to a fuel pump driver (FPD) 2 is disabled, the FPD 2 is configured so as to drive a fuel pump 4 by using the maximum command value DTYMAX (100%) as a drive control command value DUTY. A stop state of the fuel pump 4 is maintained even if the drive control command value DUTY is the maximum command value DTYMAX when an ignition switch 21 is in the OFF State so as to have stopped the fuel pump 4, while the fuel pump 4 is driven when the ignition switch 21 is in the ON state and the drive control command value DUTY is the maximum command value DTYMAX.

The present invention determines whether multi-stage injection control is operating normally or abnormally, and carries out a failsafe of multi-stage injection control as necessary. The present invention, which solves the problem described above, has means such as the following. The invention is provided with fuel injection valves provided respectively to each cylinder, an opened/closed valve detection means for detecting either one or both of an open valve state and a closed valve state of the fuel injection valves on the basis of the drive currents or drive voltages of the fuel injection valves, and a detection execution determination means for determining a detection execution time period including the detection start timing and the detection end timing of the open valve state or closed valve state; detection interference such as overlapping detection with another cylinder and overlapping of open valve detection and closed valve detection being preventable, and risks such as erroneous detection being reducible.

A method for detecting the malfunction of a software solution configured to generate data representing the instant of interruption of fuel injection of an internal combustion engine. The method comprises acquiring data by a data acquisition device which is connected to a measurement device fixed to an injector body and configured to emit data representing closure instants of an injection nozzle, recording the data generated by the software solution and the data emitted by the measurement device, over a predetermined duration, synchronizing the data generated by the software solution and the data emitted by the measurement device, and comparing the data generated by the software solution and the data emitted by the measurement device, the software solution being considered to be malfunctioning when they do not satisfy predefined criteria.

An anomaly determination device executes a first anomaly determination process and a second anomaly determination process. The anomaly determination device determines in the first anomaly determination process that an anomaly is present in a link mechanism when a fully-closed-time detection value is outside a closed-side normal range and when a fully-open-time detection value is outside an open-side normal range. The anomaly determination device determines in the second anomaly determination process that an anomaly is present in the link mechanism if the difference between the fully-closed-time detection value and the fully-open-time detection value is outside a normal distance range set in advance when it is not determined in the first anomaly determination process that an anomaly is present in the link mechanism.

At least some embodiments of present disclosure direct to a fuel injection timing drift detection and/or compensation system. In some cases, the system collects or receives a series of fuel pressure data measured by one or more fuel pressure sensors. The system is configured to receive an indication of fuel flow cutout and a start-of-injection command signal. The system calculates a set of pressure drops using the series of fuel pressure data and identifies a selected pressure drop greater than a predetermined threshold to determine a measured start-of-injection timing based on the selected pressure drop. The system is further configured to evaluate whether a fuel injection drifting occurs based on received start-of-injection command signal and the measured start-of-injection timing. In some cases, the fuel injection drifting is used to either compensate fuel injection timing or raise a flag indicating the drifting.

Some embodiments of the teachings herein include an apparatus for diagnosing bypass valve failure in an electric supercharger with a motor and an electric compressor comprising: a bypass valve on a bypass line branching from an intake line with the electric supercharger; and a control unit which assesses the vehicle-state information to determine whether failure criteria of a bypass valve start are satisfied. If the failure criteria are satisfied, the control unit transmits open or close control instructions to the bypass valve and transmits, to the electric supercharger, a specific rotational-speed target value for determining whether the bypass valve is in the normal open state or the normal closed state, thereby determining whether the bypass valve is subject to stuck-open failure or stuck-closed failure.

When the vehicle is stopped and removal of deposits is not required, and forced charging of a power storage device is not being performed, the controller controls the fuel supply device so that a supply fuel pressure is at the first fuel pressure. When the vehicle is stopped and the removal of deposits is required, and the forced charging of the power storage device is being performed, the controller controls the fuel supply device so that the supply fuel pressure is at a second fuel pressure higher than the first fuel pressure. When the vehicle is stopped and the removal of deposits is required, and the forced charging of the power storage device is not being performed, the controller controls the fuel supply device so that the supply fuel pressure is at a third fuel pressure higher than the first fuel pressure and lower than the second fuel pressure.