초록 ▼

A control device for controlling the quantity of fuel which is supplied to the cylinders of an internal combustion engine by means of an injection device at each cylinder exhibits a precontrol timer 10, an individual-value memory 11 and a logic device 12. The individual-value memory stores individua

A control device for controlling the quantity of fuel which is supplied to the cylinders of an internal combustion engine by means of an injection device at each cylinder exhibits a precontrol timer 10, an individual-value memory 11 and a logic device 12. The individual-value memory stores individual values which are provided to the injection devices for the individual cylinders of an internal combustion engine 13. The logic device logically combines the individual values with a precontrol time provided by the precontrol timer, in such a manner that such a control time is obtained for each injection device that the lambda values individually measured for each cylinder by a lambda probe in the exhaust gas are essentially equal for all cylinders. It is possible to achieve very advantageous exhaust gas values with such a control device.

대표청구항 ▼

A method of controlling the quantity of fuel which is metered to the individual cylinders of an internal combustion engine by means of an injection device, the method comprising the steps of: correcting precontrol times, which are common to all cylinders and dependent on rotational speed and air qua

A method of controlling the quantity of fuel which is metered to the individual cylinders of an internal combustion engine by means of an injection device, the method comprising the steps of: correcting precontrol times, which are common to all cylinders and dependent on rotational speed and air quantity drawn in by suction, with individual corrective values dependent upon lambda actual values; forming the individual corrective values from a combination of individual factors (az) and individual summands (bz); determining the cylinder for which there is a deviation of the airfuel ratio from a pregiven lambda value in the event of a deviation of the value, which is measured by the lambda probe, from a pregiven lambda value; adjusting the desired lambda value by changing the individual factors (az); determining the value of the injection time (tiu) corrected as may be required and belonging to the desired lambda value at (tLu); adjusting the desired lambda value by changing the individual factors after an upper value (tLo) of the load variable occurs and in the event of a deviation of the value measured by the lambda probe from a pregiven value; determining the value of the injection time (tio) corrected as may be required and belonging to the desired lambda value (tLo); computing and storing the individual factor (az) and the individual summand (bz) for a specific cylinder from the equations: tiu =az x tLu +bz tio =az x tLo +bz and, again examining the computed values for (az) and (bz) and correcting said values (az) and (bz) as may be required after the occurrence of the value (tLu) of the load variable.