Patent ID: 6988028

Claim:
A cruise control system for a vehicle equipped with an internal combustion engine and a manual transmission connected to the engine through a clutch, the clutch being capable of engaging and disengaging the engine and the manual transmission, the manual transmission being capable of producing a plurality of gear ratios and of selecting one of the gear ratios, the cruise control system comprising: a first speed sensor detecting a first speed indicative of a rotation speed of the engine; a second speed sensor detecting a second speed indicative of a wheel speed of the vehicle; and a controller connected to the first and second speed sensors, the controller being configured: to start a cruise control for controlling an output of the engine so that the vehicle travels at a preset vehicle speed, in response to a driver's demand, to calculate a first vehicle operation indicative quantity based on the first speed, the first vehicle operation indicative quantity including at least a pseudo vehicle speed calculated from the first speed and the selected gear ratio of the manual transmission; to calculate a second vehicle operation indicative quantity based on the second speed, the second vehicle operation indicative quantity including at least a vehicle speed obtained from the second speed; to determine whether a deviation between the first vehicle operation indicative quantity and the second vehicle operation indicative quantity is greater than a predetermined value; and to cancel the cruise control when the deviation is greater than the predetermined value, wherein the pseudo vehicle speed is obtained by multiplying the first speed, the selected gear ratio of the manual transmission and a coefficient.