Complex sentence: Cars with a Saxomat clutch did not have a clutch pedal, the clutch was engaged above certain engine RPM by centrifugal force, acting on spinning weights inside the clutch, similar to a centrifugal governor.
Split into simpler sentences: Cars with a Saxomat clutch did not have a clutch pedal. The centrifugal clutch was engaged above certain engine RPM by centrifugal force, acting on spinning weights inside the clutch, similar to a centrifugal governor.