초록 ▼

A method for calibrating a pressure sensor in a fuel metering system and a corresponding device, which enable the pressure sensor to be calibrated as precisely as possible. For this purpose, the instantaneous cooling-water temperature of the internal combustion engine is measured and the drop in the

A method for calibrating a pressure sensor in a fuel metering system and a corresponding device, which enable the pressure sensor to be calibrated as precisely as possible. For this purpose, the instantaneous cooling-water temperature of the internal combustion engine is measured and the drop in the cooling-water temperature is derived therefrom as a measure for the standstill time of the internal combustion engine, the pressure sensor first being calibrated when the standstill time exceeds a predefinable minimum. Thus, an arrangement for monitoring the cooling-water temperature already present per se in the vehicle may be used to reliably and precisely calibrate the pressure sensor. Therefore, this is able to be realized very quickly and almost without extra expenses, in particular without using an additional timing supervision for measuring the standstill time. The method and the corresponding device are well suited for calibrating pressure sensors in the high-pressure region (rail pressure sensors) as well as for calibrating sensors in the low-pressure region (presupply pressure sensors).

대표청구항 ▼

A method for calibrating a pressure sensor in a fuel metering system and a corresponding device, which enable the pressure sensor to be calibrated as precisely as possible. For this purpose, the instantaneous cooling-water temperature of the internal combustion engine is measured and the drop in the

A method for calibrating a pressure sensor in a fuel metering system and a corresponding device, which enable the pressure sensor to be calibrated as precisely as possible. For this purpose, the instantaneous cooling-water temperature of the internal combustion engine is measured and the drop in the cooling-water temperature is derived therefrom as a measure for the standstill time of the internal combustion engine, the pressure sensor first being calibrated when the standstill time exceeds a predefinable minimum. Thus, an arrangement for monitoring the cooling-water temperature already present per se in the vehicle may be used to reliably and precisely calibrate the pressure sensor. Therefore, this is able to be realized very quickly and almost without extra expenses, in particular without using an additional timing supervision for measuring the standstill time. The method and the corresponding device are well suited for calibrating pressure sensors in the high-pressure region (rail pressure sensors) as well as for calibrating sensors in the low-pressure region (presupply pressure sensors). edal position decreases, such torque demand producing a signal fed to the electronically controlled throttle, such processor comparing at least two independent estimates of torque with a commanded torque demand on the engine; and if the maximum of the two independent estimates of torque exceeds the commanded torque demand, torque demand on the engine is potentially intervened; and, if the load estimated from an air meter disposed in the path of air flow to the engine is greater than estimated load from throttle position, then the demand is reduced to prevent said potential intervention. 6. An internal combustion engine system, comprising: an electronically controlled throttle disposed in the airflow to an intake manifold of the engine; an airflow meter disposed in such airflow to the intake manifold of the engine; an operator pedal; a controller programmed to respond to a torque demand input to the engine through the operator pedal, such torque demand increasing as such pedal position increases and such torque demand decreasing as such pedal position decreases, such torque demand producing a signal fed to the electronically controlled throttle, such processor comparing torque demand with two independent torque estimates;