A controller for an internal combustion engine is provided. Control circuitry executes a determination process when the internal combustion engine is in an idling operation state. A pressure sensor detects a passage fuel pressure that is a pressure of gaseous fuel in a portion of a fuel passage…
A system for determining fuel delivery includes an internal combustion engine having a plurality of cylinders, a plurality of fuel injectors configured to inject fuel for combustion in the cylinders, a fuel rail configured to provide the fuel to the plurality of fuel injectors, and a fuel pump…
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…
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…
A throttle control system includes a throttle device and a controller that controls the throttle device. The controller executes a driving process of driving the electric motor such that a target angular position of the specific gear continues to increase beyond or decrease below the initial…
A method for operating an injector on an internal combustion engine includes the steps of: introducing a fuel into a combustion chamber of the internal combustion engine by way of the injector; capturing, for a plurality of injection events, a wear value for the injector; assigning each respective…
A method of operating an engine is provided. An exhaust valve actuation fault is detected for a first exhaust valve associated with a first cylinder during a first working cycle. In response to the detection of the exhaust valve actuation fault, fueling to at least the first cylinder is cut off…
A method for diagnosing a part of a powertrain system is provided. The powertrain system comprising an internal combustion engine system having an internal combustion engine provided with a plurality of cylinders, each cylinder being provided with an air inlet valve and an exhaust gas valve, the…
A method to estimate the temperature of an electromagnetic actuator, which entails a preliminary step in which to define a first threshold value for the current or for the voltage; and define a characteristic curve of the actuator family in the plane temperature/time needed to reach the threshold…
A method of operating an engine is provided. An exhaust valve actuation fault is detected for a first exhaust valve associated with a first cylinder during a first working cycle. In response to the detection of the exhaust valve actuation fault, fueling to at least the first cylinder is cut off…
Systems and methods for determining operation of a cylinder deactivating/reactivating device are disclosed. In one example, a warm engine is rotated without being supplied fuel to determine the presence or absence of valve actuator degradation. Degraded valve actuators may be determined when there…
A microcomputer determines a presence of an abnormality of a fuel injection quantity control device based on a comparison between a required injection quantity as a command value for the amount of a fuel injected from an injector in one engine cycle and a total monitor injection quantity as a total…
A method and diagnostic facility for checking a plurality of magnetic valves in a high-pressure tank system of a motor vehicle is described. A magnetic valve is activated for opening the magnetic valve. A pressure in a high-pressure tank system is measured while activating the magnetic valve. A…
Various methods and systems are provided diagnosing a valve. In one example, a system comprises a valve (236) configured to regulate a fuel flow, and a controller (180) configured to determine degradation of the valve (236) based on an initial opening characteristic of the valve (236).
In an apparatus for controlling a general purpose engine having a choke valve, a choke valve opening/closing mechanism, a choke valve opening regulating mechanism, a heater and a heater connection terminal, it is configured to detect temperature of the general purpose engine, to determine whether…
A system for diagnosing the starting of an internal combustion engine is described, comprising internal components of the engine and components for managing the engine functionalities, vehicle batteries to supply power to a starter, a fuel injection system; the method comprising a step of detecting…
An object of the invention is to detect, in a fuel injection control system for an internal combustion engine equipped with a low pressure fuel pump and a high pressure fuel pump, a failure in the fuel injection system including the high pressure fuel pump with high accuracy. To achieve the object…
In an adjustment device of a high-pressure pump for increasing a pressure of a fuel supplied from a feed pump and pressure-feeding the fuel, the adjustment device includes: an inlet valve changing a communication state between a cylinder provided in the high-pressure pump and a feed pump…
This invention relates to a deposit remove amount estimation device for estimating inlet and outlet deposit remove amounts by calculating an inlet deposit remove amount which is an amount of a removed combustion product among the combustion product accumulating on an injection hole inlet area and…
The invention relates to a deposit amount estimation device for estimating a deposit amount by calculating an amount of a deposit on an injection hole wall face of a fuel injector (22). An increment judgment of whether an actual fuel injection amount is larger than the required fuel injection…
Method for monitoring an opening of an injection valve comprising a movable valve needle and preventing a fluid flow through a fluid outlet portion in a closing position and releasing the fluid flow through the fluid outlet portion in further positions, and an actuator unit with a coil and an…
The subject of the invention is a non-invasive method of diagnosing injection systems of self-ignition engines, marine engines in particular. The diagnostic method of the fuel injection process in a self-ignition engine in this invention is characterized by the fact that, without disturbing the…
An internal combustion engine control apparatus includes an output-current abnormality-signal holding unit (112) that determines whether a current abnormality signal is being output from a current-abnormality detecting unit (108, 110), which compares a current value detected by a current detecting…
The engine (1) has two injection pumps (2, 3) driven by a camshaft/crankshaft of the engine. The pumps convey a fuel into a common rail (4) and into a respective cylinder head of the engine. The common rail has a rail pressure sensor (5), which determines rail pressure and transmits the determined…
The arrangement has a pump element, a pressure damper with a vent line for compensating fluctuations on the low pressure input side and a shut-off valve in the vent line, whose end not connected to the pressure damper is connected to the clean air side of the engine's induction tube. A diagnostic…
A fuel supply control system is arranged to execute a first diagnosis based on the a fuel injection quantity (Qi) and a fuel pump discharge quantity (Q) after a feedback control of a fuel pressure (p) is started, to execute a second diagnosis when a result of the first diagnosis is NG or when the…
The control and/or diagnosis process is for an engine (1) with a mixture adaptation function. Fuel from at least one valve (5) is injected directly into at least one combustion chamber (4). The process is implemented by means of a computer program for a motor vehicle engine and a control apparatus…
In a redundant mechanism having two pressure regulating valves for covering one of the pressure regulating valves when the other one is in the defective conditions, quick recognition of the defective side is enable when one of them are in the defective conditions. A first and second pressure…
An excessive volume of fuel discharged by a high-pressure supply pump (3) to a common rail (4) due to an opened state abnormality of an inlet metering valve (7) may result in an abnormal increase in common rail pressure. In the event of such an abnormal increase, a target idle revolution speed is…
To detect a failure of the fuel heaters of a multi-cylinder internal combustion engine of vehicles by utilizing a microcomputer of a vehicle operation control device and sensors already provided in the vehicle such as an air/fuel ratio sensor or a crankshaft rotation sensor, with a supplement of…