Patent ID: 7569948

Claim:
A vehicle speed detection control system, comprising: a first module that determines rotational speeds of a transmission output shaft (RPM TOSS ), a wheel of a vehicle (RPM ABS ), and an engine crankshaft (RPM ENG ); a second module that generates a first comparison based on a difference between RPM TOSS and RPM ABS and a first threshold, that generates a second comparison based on RPM ABS and a second threshold, and that generates a third comparison based on RPM ENG and a third threshold; and a third module that generates a vehicle speed based on RPM TOSS , RPM ABS , and the first, second, and third comparisons, wherein the vehicle speed is based on RPM ABS when the difference between RPM TOSS and RPM ABS is greater than or equal to the first threshold, RPM ABS is less than or equal to the second threshold, and RPM ENG is greater than or equal to the third threshold.