摘要:
During operation of an internal combustion engine (10) the fuel from at least one injector (20) reaches an inlet duct (16). The effect of a fuel wall film (32) in the inlet duct (16) on the amount of fuel reaching the combustion chamber (12) is accounted for. According to the invention, a first amount of fuel is modelled that reaches the wall film (32) from the injector (20).
摘要:
DEe present invention relates to a device for the recognition of a defective signal, wherein a single measuring value is detected using two different signal-generation means. An error is recognised when the absolute values of the filtered signals differ from one another in a predetermined way. By estimating the sign of the difference, it is thus possible to determine which of the two signal-generation means is defective.
摘要:
The invention relates to an internal combustion engine (1), especially an internal combustion engine of an automobile. Said internal combustion engine (1) is provided with a combustion chamber (4) into which fuel is injected in a first operating mode during a compression phase and in a second operating mode during an intake phase. The internal combustion engine (1) is also provided with a control device (18) for switching between the operating modes, and has an exhaust gas recirculation system with an exhaust gas recirculation valve (14). The internal combustion engine (1) is switched to the first operating mode when the exhaust gas recirculation valve (14) jams in its open state.
摘要:
A vacuum reservoir (22) of a pneumatically operated power assist aggregate (30) of a motor vehicle is subjected to a vacuum by an electrical suction pump (28). In order to monitor the vacuum reservoir (22) and the electric suction pump (28), the invention provides that an initial pressure in the vacuum reservoir (22) is determined. In addition, a final pressure in the vacuum reservoir (22) is determined after a defined time interval. Furthermore, the difference between the final pressure and the initial pressure is established and compared with a limiting value. When the limiting value is surpassed, a signal is generated, in particular, a warning and/or alarm signal.
摘要:
The invention relates to a device for evaluating the output signals of a sensor, for example of an air flow sensor in a motor vehicle, which device is optionally suitable for the analog or digital processing of signals. The change between analog and digital signal processing is carried out by means or trigger signals that are supplied from outside. The device is especially useful for detecting the amount of air taken in by an internal combustion engine. A hot-film air flowmeter is used as the sensor element and the trigger signal for the change is supplied by the control element of the internal combustion engine.
摘要:
The invention relates to an internal combustion engine, especially for a motor vehicle. Said internal combustion engine is provided with a combustion chamber into which fuel can be injected in at least two operating modes. The internal combustion engine is provided with a control unit which switches between the operating modes subject to a desired operating mode. Said control unit detects the desired operating mode from a plurality of operating mode requests.
摘要:
The invention relates to a device for determining the volume of air entering the cylinder of an internal combustion engine with a supercharger, according to values such as speed, air flow rate in the induction pipe, throttle valve control values and temperature. The invention is characterized in that at least the following physical influences are taken into account in determining the volume of air entering the cylinder: the extraction equation of the engine, the balance equation of filling in the induction pipe, the flow equation of the throttle valve and the balance equation in volume between the throttle valve and the supercharger.
摘要:
An installation for venting the petrol tank of a motor vehicle has an adsorption filter (AF) with an aeration line (BL) which can be closed by a controllable shutoff valve (AV). The closable aeration line makes it possible to set specific negative or excess pressures in the installation in order to test its performance. The performance data so obtained are particularly reliable.
摘要:
A process for assessing the efficiency of a lambda control system which emits settings FR which are to vary about a reference setting FR-SOLL, said system being supported by an adaptation device which emits adaptation values, is characterised in that a continuous calculation is made of the current value EW of a decisive value which indicates the average quantitative difference between the settings and the reference setting, the current value is compared with a decisive value threshold SW-EW, and an error signal is emitted if the current value exceeds the decisive value threshold. This process has the advantage that it can also detect errors occurring only in parts of the entire range over which an internal combustion engine can be run in which the fuel supply is set by the lambda control. If such a faulty range is entered, the setting emitted by the lambda control differs from the reference setting and as a result at least one adaptation value changes. If the faulty range is left again, the altered adaptation value no longer matches the error-free range and therefore the setting emitted by the lambda control varies from the reference setting in the other direction. As these differences are quantitatively averaged in calculating the decisive value, they affect the decisive value more strongly than the at least one adaptation value, which is immediately reduced as soon as the sign of the difference in the setting changes. It is thus possible with the aid of the decisive value to detect errors which cannot be detected using an adaptation value.
摘要:
A device (14) for adapting the characteristic curve of an idling regulator has a release means (15) which authorizes adaptation only when the sign of a deviation in engine speed control (Δn) is the same as the sign of a deviation in air feed control (ΔQ). This ensure that the adaptation of the engine speed control cannot produce the opposite effect as a result of either inadequate adaptation or fault current signals from the air-measuring device (11).