摘要:
A method for vehicle electrical system diagnosis by means of a regulator, which is configured to regulate the voltage supplied by a generator via a converter for a vehicle electrical system of a vehicle by outputting an output signal, wherein the method comprises the following steps: detecting an output signal by way of a control device, ascertaining an instantaneous power output at the vehicle electrical system on the basis of the detected output signal, and analyzing the ascertained power output for diagnosis of the vehicle electrical system and at least one electrical consumer which is connected to the vehicle electrical system.
摘要:
Method for detecting a state of an electric system (150) in a motor vehicle, said electric system (150) comprising a generator unit that includes an electric machine (100) with a rotor winding (110) and a stator winding (120) as well as a rectifier (130) which is connected to the electric machine (100) and via which the electric system (150) is connected to the electric machine (100); in said method, a decision about the current state of the electric system (150), especially about the availability of a battery (200) of the electric system, is made in accordance with an excitation current (IE) flowing through the rotor winding (110) of the electric machine (100).
摘要:
A method for determining a signal offset between a crankshaft angle signal and a combustion chamber pressure signal includes: measuring the combustion chamber pressure signal; shifting an alignment of the measured combustion chamber pressure signal with respect to the crankshaft angle signal by a plurality of respective offset angles to generate a plurality of offset combustion chamber pressure signals; reconstructing the offset combustion chamber pressure signals using a plurality of predetermined inherent pressure curves to generate reconstructed combustion chamber pressure signals; determining reconstruction errors of the reconstructed combustion chamber pressure signals as a function of differences between the offset combustion chamber pressure signals and the reconstructed combustion chamber pressure signals; and determining the signal offset between the crankshaft angle signal and the combustion chamber pressure signal as a one of the plurality of offset angles producing the reconstruction error having the lowest value.
摘要:
A method for operating an internal combustion engine in an idle mode, in which an ignition angle and/or an air quantity of the internal combustion engine is influenced and/or is modified as a function of an idle rotation speed of the internal combustion engine. The ignition angle and/or the air quantity and/or a fuel quantity for at least one combustion chamber of the internal combustion engine is modified as a function of at least one variable characterizing a combustion event in the combustion chamber.
摘要:
A control system for an internal combustion engine includes a temperature sensor and an engine controller. The sensor measures the temperature of exhaust gas passing through an exhaust manifold of the engine during each cycle. The controller selectively operates the engine in a first state and a second state. In the first, normal state, a quantity of fuel based on an open loop fuel mass command value is injected into the engine each cycle. In the second state, the controller determines a temperature of the exhaust gas during a normal cycle, injects the quantity and additional fuel into the engine during a second cycle, determines the temperature of the exhaust gas during the second cycle, compares the temperatures, and adjusts the command value for fuel to be injected each cycle when operating the engine in the first state.
摘要:
A method and a system for transmitting a sensor signal, transmits the sensor signal in such a way that the analog electrical sensor signal is converted with the aid of a system for signal conversion into a converted signal and that this converted signal is transmitted to a control unit. As a result, the sensor signal is able to be transmitted to the control unit in a reliable manner and be evaluated thereby.
摘要:
A method for controlling at least one switchable valve, a brake impulse that slows down the valve movement being produced during the controlling of the at least one valve. At least one parameter of the brake impulse determines the position and/or the duration of the brake impulse. A parameter is modified, and the reaction of a measurement quantity or of a characteristic feature derived from the measurement quantity is evaluated.
摘要:
A method for determining a signal offset between a crankshaft angle signal and a combustion chamber pressure signal in an internal combustion engine, in which an instantaneously measured combustion chamber pressure profile is compared to a calculated, modeled combustion chamber pressure profile. In a method in which the correction values of the signal offset may be ascertained in any operating state of the internal combustion engine, the instantaneously measured combustion chamber pressure profile is shifted with respect to the calculated, modeled combustion chamber pressure profile along a crankshaft angle for generating an artificial signal offset, and a reconstruction quality is determined from this shifted combustion chamber pressure profile in that, from the artificial signal offset along the crankshaft angle of the shifted instantaneously measured combustion chamber pressure profile, a reconstruction error is ascertained as a measure of the effective signal offset between the crankshaft angle signal and the combustion chamber pressure signal.
摘要:
In a method for recognizing knocking of an internal combustion engine, solid-borne sound signals are measured and solid-borne sound features are recovered from the measured sound signals. A peak pressure for a combustion event of the internal combustion engine is estimated from the solid-borne sound features, and the estimated peak pressure is compared with a knock recognition threshold, knocking of the internal combustion engine being recognized when the knock recognition threshold is exceeded by the estimated peak pressure.
摘要:
A method for vehicle electrical system diagnosis by means of a regulator (240, 270), comprising: detecting (10) the output signal of a voltage regulator (240, 270), which is configured to regulate the voltage supplied by a generator (200) via a converter (250, 260) for a vehicle electrical system (220) of a vehicle by outputting an output signal, by way of a control device; ascertaining (20) an instantaneous power output (100) at the vehicle electrical system (220) on the basis of the detected output signal, and analyzing (30) the ascertained power output (100) for diagnosis of the vehicle electrical system (220) and at least one electrical consumer which is connected to the vehicle electrical system.