摘要:
A method for determining a fuel pressure present at a direct injection valve comprising a solenoid drive comprises (a) detecting a voltage induced in the solenoid drive within a time span comprising a closing point in time of the direct injection valve, and (b) determining the fuel pressure based on the detected induced voltage. Further, a corresponding device, a common rail system, a motor vehicle, and a computer program for determining the fuel pressure of a valve comprising a solenoid drive are provided.
摘要:
A method for determining a closing time of a valve having a coil drive, in particular a direct injection valve for an engine of a motor vehicle, has the steps: (a) switching off a current flow through a coil (L_inj) of the coil drive, so that the coil (L_inj) is depowered, (b) capturing a time curve (110) of a voltage induced in the non-powered coil (L_inj), wherein the induced voltage is generated by decaying eddy currents in a magnetic circuit of the coil drive and by a motion of the armature relative to the coil (L_inj), (c) evaluating the captured time curve (110) of the voltage induced in the coil (L_inj), and (d) determining the closing time based on the evaluated time curve (110). A corresponding device and a computer program for determining the closing time of a valve with a coil drive can be provided accordingly.
摘要:
An internal combustion engine has a plurality of cylinders that have been allocated in at least two groups to one exhaust gas tract each. In each exhaust gas tract, an exhaust gas catalytic converter and an exhaust gas probe are fitted upstream of the exhaust gas catalytic converter. In order to detect combustion misfires in a combustion chamber of one of the cylinders, the following steps are carried out in each case. A combustion misfire is detected in one of the cylinders and allocated to one of the groups of the cylinders depending on at least one operating variable of the internal combustion engine.
摘要:
The invention relates to a method for controlling an injection of an internal combustion engine. The invention provides that after the internal combustion engine is started, the injection and/or the ignition is carried out according to a signal of an absolute position sensor device, particularly according to an absolute position sensor of a camshaft or according to an absolute position sensor of a crankshaft and to an angular range sensor. When a synchronization signal is detected by a sensor wheel of the crankshaft, the following control processes are carried out according to the synchronization signal, i.e. according to the position of the crankshaft. The inventive method is advantageous in that immediately after the internal combustion engine is started, a relatively precise signal for controlling the injection and/or the ignition is available. This enables a more precise combustion shortly after the internal combustion engine is started.
摘要:
A method is provided for determining a time duration for an electric actuation of a valve which has a coil drive, in particular of a direct-injection valve for an internal combustion engine. The method may include a deactivation of a current flow through a coil of the coil drive, such that the coil is in a currentless state, a detection of a time profile of a voltage induced in the currentless coil, a determination of the closing time of the valve on the basis of the detected time profile, and a determination of a time duration of the electric actuation of the valve for a future injection process on the basis of the determined closing time. A corresponding device and a computer program for carrying out the described method are also disclosed.
摘要:
A device (100) and to a method allow for a direct injection valve having a coil drive (110) to reduce in particular the pulse to pulse variation of the volume of fuel injected by the direct injection valve by a control also based on a current integral of the coil drive (110), in particular during a boost phase of a current activation profile of the coil drive (110). The method can be carried out by a computer program.
摘要:
This invention relates to a method for increasing the reproducibility of the start-up in the start-stop operation of an internal combustion engine of a motor vehicle with start optimization. The reproducibility of the start-up is increased by reducing a maximum speed gradient that can be achieved for different stop positions of the internal combustion engine to a set speed gradient.
摘要:
In a control unit and a method for operating a hybrid drive arrangement (1) with an internal combustion engine (5), an electric drive (3) and a coupling device (20) that is arranged therebetween, when the internal combustion engine (5) and the electric drive (3) should be coupled together, the rotational speed of the internal combustion engine (5) is pilot-controlled to a target rotational speed level (N2) such that the drive shafts (4, 6) of the internal combustion engine (5) and the electric drive (3) run at least approximately synchronously. The pilot-control takes place by the throttle valve. Subsequently, the rotational speed of the internal combustion engine (5) is controlled in such a manner that the drive shafts (4, 6) of the internal combustion engine (5) and the electric drive (3) run essentially synchronously. Then, the drive shafts (4, 6) are joined by the coupling device (20).
摘要:
To monitor an exhaust-gas catalytic converter when the internal combustion engine is at its operating temperature, an NOx sensor is used to determine the NOx concentration downstream of the exhaust-gas catalytic converter which is to be diagnosed. During the diagnosis time, the oxygen loading of the exhaust-gas catalytic converter is increased, and the conversion ability of the exhaust-gas catalytic converter is worked out from the NOx concentration which is measured during a plurality of lambda controller oscillations.
摘要:
A method for determining a fuel pressure present at a direct injection valve comprising a solenoid drive comprises (a) detecting a voltage induced in the solenoid drive within a time span comprising a closing point in time of the direct injection valve, and (b) determining the fuel pressure based on the detected induced voltage. Further, a corresponding device, a common rail system, a motor vehicle, and a computer program for determining the fuel pressure of a valve comprising a solenoid drive are provided.