Alfred Kratt

Apparatus for regulating the idling rpm of internal combustion engines

Failsafe emergency operation device for idling operation in motor vehicles

Method and apparatus for controlling at least one throttle cross section in a control line

Device for controlling an operating characteristic of an internal combustion engine

Method and arrangement for checking the operability of a fluid-flow conducting conduit system of an internal combustion engine

Method for measuring the flow rate of a medium flowing through a pipe and apparatus therefor

Method of controlling tank venting in an internal combustion engine and apparatus therefor

Method and arrangement for monitoring the operability of a heater of an oxygen measuring probe

Signal evaluation for vehicle pressure sensor - passing fluid-pressure signal from fluid-pressure sensor located in tank ventilation chamber to band=pass filter for acceleration measurement and to low=pass filter for pressure measurement

METHOD AND DEVICE FOR OPERATING A GAS INJECTION SYSTEM OF A GAS FUEL AND A LIQUID FUEL OPERATED INTERNAL COMBUSTION ENGINE