摘要:
In a method for determining a state of a sensor configured to ascertain an operating parameter of an internal combustion engine, at least one aging effect which has an influence on a sensor characteristic curve of the sensor is detected. The sensor has different sensor characteristic curves for different states of the sensor. The at least one aging effect is detected during operation of the sensor. An item of aging information which reflects the at least one aging effect is stored in an electronic memory. The state of the sensor is deduced from the aging information which is present in stored form and which reflects the aging effect that has acted on the sensor. The deduction is carried out based on a predefined linkage between the at least one aging effect and the state of the sensor.
摘要:
A method and system for improving sensor accuracy of diesel emissions is disclosed. The method and system change the sensor reading as a function of sensor age to provide a more accurate measure of the diesel emissions. By estimating the degree of sensor error and then providing a gain correction factor as a function of sensor age, a more accurate measure of the diesel emissions is provided.
摘要:
The invention relates to a method for setting an emergency operational mode in a system which detects pre-ignitions in a combustion engine and which contains errors. The system consists of at least one sensor (17) and/or at least one sensor cable (24) and/or a sensor signal evaluation device (20), and is subject to a diagnosis to detect an error. In order to prevent damage to the combustion engine if the system for detecting pre-ignitions does contain an error, a standard path (26), which comprises sensor signal capturing, sensor signal evaluation, detection of pre-ignitions and initiation of measures to counter the pre-ignitions, is interrupted when the diagnosis detects an error in the system (17, 24, 29), and a safety path (27) is activated as an emergency operational mode.
摘要:
There are provided a combustion start determination unit that determines whether or not the inner-cylinder state of an internal combustion engine has changed from a non-combustion state to a combustion state; and a filter coefficient changing demand unit that outputs a filter coefficient changing demand until a predetermined filter coefficient changing period elapses from the time instant when the combustion start determination unit determines that the inner-cylinder state of the internal combustion engine has changed from the non-combustion state to the combustion state to the time instant. Based on the filter coefficient changing demand, at least one of a background level calculation unit and a standard deviation calculation unit changes the value of a filter coefficient utilized in a filtering operation to the one with which a filtering effect is weakened.
摘要:
An engine torque compensation method is based on a change in the concentration of ethanol for a Flexible Fuel Vehicle (FFV). In the method, a concentration of ethanol in fuel that is supplied to an engine is acquired. A driver-required torque based on an opening rate of a throttle valve depending on manipulation of an accelerator by a driver is calculated. A torque correction factor depending on the opening rate of the throttle valve and the concentration of the ethanol is calculated. A final driver-required torque is obtained by multiplying the torque correction factor by the driver-required torque.
摘要:
An engine controlling apparatus for a motorcycle for reducing the output power of the engine when necessary includes a second controller for deciding, if a brake operation is detected based on an opening value of an accelerator grip detected by a potentiometer for detecting an opening value of the accelerator grip that the accelerator grip is in an open state, whether it is necessary to reduce the output power of an engine and for carrying out output power reduction control of the engine. If a front wheel brake sensor detects a brake operation for the front wheel and in addition it is decided from the speed value detected by a vehicle speed sensor that the motorcycle is not being decelerated, then the second controller decides that there is the necessity to reduce the output power of the engine and carries out the output power reduction control of the engine.
摘要:
A control apparatus for an internal combustion engine is provided that can correct a shift in an output value of an in-cylinder pressure sensor that occurs for a predetermined time period after occurrence of abnormal combustion. A pre-occurrence output characteristic indicating a relationship between in-cylinder pressure and an actual sensor output value of the in-cylinder pressure sensor in a pre-occurrence cycle before occurrence of abnormal combustion is previously stored. Estimated in-cylinder pressure in a post-occurrence cycle after occurrence of abnormal combustion is acquired. A post-occurrence output characteristic is calculated from the estimated in-cylinder pressure and the sensor output value in the post-occurrence cycle. A difference between outputs of the in-cylinder pressure sensor before and after occurrence of the abnormal combustion is calculated from the pre-occurrence output characteristic and the post-occurrence output characteristic. The sensor output value in the post-occurrence cycle is calibrated using the difference between outputs.
摘要:
A method of diagnosing faults within an engine system, the engine system comprising a plurality of cylinders, the method comprising: monitoring the output signal of one or more in-cylinder pressure sensors within the engine system, each of the one or more in-cylinder pressure sensors being associated with a cylinder within the engine system; determining a pressure related parameter for a given cylinder having an associated in-cylinder pressure sensor; and diagnosing the presence of faults within the engine system on the basis of the pressure related parameter.
摘要:
A fault diagnosis device conducts a fault diagnosis in a temperature sensor. At starting an internal combustion engine, a thermal equilibrium condition may be established and temperature deviations of temperatures detected by at least two reference temperature sensors from each other may be equal to or less than a predetermined value, with the temperatures detected by the reference temperature sensors being greatly deviated from one detected by a temperature sensor being diagnosed. In this case, if the temperatures detected by the reference temperature sensors do not drop by a predetermined temperature or more from starting the engine until a predetermined time elapses, the fault diagnosis device determines that the temperature sensor being diagnosed is faulty.
摘要:
A competence diagnosis system for a urea water temperature sensor that can limit a diagnosis during a cold start. The system includes a cold start condition determination unit that obtains a difference between an engine cooling water temperature and an ambient temperature, a difference between an engine cooling water temperature and a fuel temperature, and a difference between an ambient temperature and a fuel temperature by using an engine cooling water temperature, an ambient temperature, and a fuel temperature measured immediately after engine starting, and allows a diagnosis by the competence diagnosis unit when the temperature differences are less than or equal to a predetermined threshold value.