Abstract:
The invention relates to a method for knock regulation in an internal combustion engine, whereby a knock recognition is carried out on the cylinders of an internal combustion engine and, depending, upon the recognition of a knocking combustion in at least one cylinder, an ignition point is retarded by a preset amount. The system comprises at least two electronic evaluation units, each of said electronic evaluator units is attached to at least one cylinder and evaluation of the signals from the knock sensors arranged on the cylinder is performed by the corresponding electronic evaluation unit. Knock recognition and setting the ignition time are achieved by means of a regulator unit and the function of the evaluation unit is monitored. On recognition of a fault of at least one of the electronic evaluation units (30), the at least one cylinder (12, 14) assigned to said electronic evaluation unit is connected to the regulator of at least one cylinder (16, 18) with an intact electronic evaluation unit (32).
Abstract:
The method serves for the operation of an Otto-cycle internal combustion engine with fuel injection on a cold start and is characterised by the following steps: retarding adjustment (13) of the ignition angle to a cold start value, for at least the first combustion, in at least one cylinder, of the internal combustion engine, during a cold start phase, whereby the fuel injected into the cylinder is made to combust and a normal adjustment (14) of the ignition angle to terminate the cold start phase.
Abstract:
The invention relates to a method and a device for error detection or diagnosis, for use in a multicylinder internal combustion engine with a knock sensor. An actual reference value produced from a sensor signal is compared with predetermined upper or lower reference level thresholds for diagnosis purposes. Defective functioning is indicated when the current reference level falls below or exceeds said thresholds in a predetermined manner. The reference levels correspond to a background noise in knock-free operation, for example. The error detection or diagnosis process is only carried out for the cylinder emitting or registering the loudest noise, respectively.
Abstract:
The invention relates to a method and to a device for controlling the idle operation of a drive unit. According to the inventive method, a control unit influences the advance angle of an internal combustion engine on the basis of a deviation between an actual and a desired variable. Said control unit is characterized by at least one modifiable parameter which in operative phases in which an adjustment of the advance angle to early is not desired takes a value different from the normal operation that limits the effect of the advance angle intervention.
Abstract:
The method serves for the operation of an Otto-cycle internal combustion engine with fuel injection on a cold start and is characterised by the following steps: retarding adjustment (13) of the ignition angle to a cold start value, for at least the first combustion, in at least one cylinder, of the internal combustion engine, during a cold start phase, whereby the fuel injected into the cylinder is made to combust and a normal adjustment (14) of the ignition angle to terminate the cold start phase.
Abstract:
The invention relates to a method for determining the ignition point of an internal combustion engine comprising the following steps: preparing a characteristics field (KF) for the ignition point (tz) according to at least one load signal (tL) which indicates the relative filling of a cylinder of the internal combustion engine with air; recording the load signal (tL) at a time (t0) which occurs before the ignition point (tz) that is to be determined; predicting a future load signal (tLPr) for a subsequent time (t0) + DELTA ) which occurs before the ignition point (tz) that is to be determined, and determining the ignition point (tz) from the characteristics field (KF) while taking the predicted load signal (tLPr) as a basis.
Abstract:
According to the invention reference values are generated from the output signals of a detector. A sliding mean (comparison value) is calculated from a large number of reference values. Depending on the amplitude distribution of the reference values around the comparison value a diagnosis of the function of the detector is carried out. If a malfunction is detected an error message is transmitted to the driver and an emergency operating mode is initiated for the internal combustion engine.
Abstract:
The invention relates to a method of adapting the ignition timing in an internal combustion engine to the crankshaft position depending on variations in engine r.p.m., load and overlap between the inlet and exhaust valves. The ratio between combusted and non-combusted gas in the cylinders is computed, and this ratio is utilized, in such a way that the greater the proportion of combusted gas there is, the earlier the ignition will be initiated. The invention also relates to an engine with a control unit (9) and means (11, 13, 14, 15) for computing said ratio, and controlling the ignition timing in the disclosed manner.
Abstract:
The total ignition angle ZW(z) of each cylinder z is composed of cylinder-selective values basic ignition angle GZ(z) [determined by engine speed n and load L], knock adjustment angle KNK(z), in addition to a first adaptation value AD1(z) and a second adaptation value AD2 common to all cylinders. AD1(z) is increased when KNK(z) is greater than a theshold DEC and is reduced when KNK(z) is lower than a threshold INC. AD2 is formed as a function of the average value AD1 of the adaptation values of all cylinders.
Abstract translation:每个气缸z的总点火角ZW(Z)由[的发动机转速N和负荷L确定]基本点火GZ(Z),敲缸选择性值的调整角KNK(Z),并且所述第一适配值AD1(z)和一个所有气缸共用的第二适配值AD2 在一起。 当KNK(z)是大于阈值DEC更大AD1(z)的增加,并且当KNK(z)是小于阈值INC降低。 AD2被形成为均值的函数 AD 1 O>所有气缸的适应值。
Abstract:
An internal combustion engine assembly including an internal combustion engine including an engine block having at least one cylinder, a piston mounted within the cylinder for reciprocal movement in the cylinder, a fuel injector for injecting fuel into the cylinder, the fuel injector initiating a fuel injection event at a predetermined time and a circuit for generating a spark in the cylinder a predetermined amount of time after the injection event to cause combustion of fuel in the cylinder. 00000