초록 ▼

A safety device is proposed for an internal combustion engine which is operated with supercharging in combination with both a fuel metering system and a control unit for the instant of ignition. The safety device is characterized in that it controls the fuel metering in accordane with the volumetric

A safety device is proposed for an internal combustion engine which is operated with supercharging in combination with both a fuel metering system and a control unit for the instant of ignition. The safety device is characterized in that it controls the fuel metering in accordane with the volumetric efficiency of the engine. In the case of an excessively high volumetric efficiency, a defect of the charger or of the charge-pressure regulator is presumed. In order to protect the engine from mechanical and thermal overload, the fuel metering in this case is either reduced or shut off completely. The subsequent reinitiation of the fuel metering is suitably effected in combination with a late instant of ignition or a late injection onset in order to prevent a jump in torque.

대표청구항 ▼

A safety device for an internal combustion engine operated with a supercharger comprising: means supplying an air-flow rate signal; means supplying an rpm signal; the quotient of said air-flow rate signal and said rpm signal defining the volumetric efficiency of said engine; a fuel metering system;

A safety device for an internal combustion engine operated with a supercharger comprising: means supplying an air-flow rate signal; means supplying an rpm signal; the quotient of said air-flow rate signal and said rpm signal defining the volumetric efficiency of said engine; a fuel metering system; a control unit for the timing of ignition; a safety device for monitoring a threshold value of said volumetric efficiency connected between said fuel metering system and said control unit, said device having means for reducing the quantity of metered fuel to said fuel metering system in accordance with said value of volumetric efficiency, said safety device comprising a first comparison means responsive to a timing element coupled to said air flow rate signal means and to said rpm signal means and producing an output, a timing means responsive to the output of said first comparison means and producing an output to decontrol said fuel metering system, a second comparison means responsive to the output of said timing means and responsive to said timing element and producing an output coupled to control said fuel metering system, and an ignition-angle correction means responsive to said output of said second comparison means and producing an output coupled to said control unit for determining the instant of ignition.