ENGINE STARTER PROTECTIVE AND CONTROL MODULE AND SYSTEM

An engine starter protective and control module (PCM) and system having a 1/2 second start speed delay timer (DT) and a 30-second crank timer (CT) that are started when a start switch (SS) is closed to control a logic circuit (L) that operates a coil driver (CD) to energize the engine starter motor (ES). An engine speed signal from an engine-driven alternator (ALT) shaped in a wave shaping circuit (WSC) is detected by a crank frequency sensor (CFS) which by-passes the delay timer (DT) to continue the cranking if the engine attains an initial speed adequate for starting, otherwise, if the battery is too low, the delay timer (DT) terminates cranking. A run frequency sensor (RFS) receives the speed signal and provides a lockout signal to the logic circuit (L) when the engine speed reaches run RPM. A crank timer (CT) started by the start switch (SS) times a 30-second cranking cycle and a 2-minute cool-off lockout interval to prevent overheating of the starter motor (ES). If the engine does not attain run RPM in 30 seconds, the crank timer (CT) provides a lockout signal that controls the logic circuit (L) to stop cranking, operates a supply switch (SSL) to provide power to the run frequency sensor (RFS), crank timer (CT) and wave shaping circuit (WSC) in shunt of the start switch (SS), and controls timing of the lockout interval whereafter the system is automatically reset.