Control system for engine-driven auxillary equipment for vehicles

Claim 1

A control system for an engine-driven auxiliary equipment for a vehicle comprising: an engine; an automatic transmission receiving power from said engine to drive a driven wheel; said automatic transmission consisting of a torque converter of a fluid coupling type having an input shaft thereof at the engine side and an output shaft thereof at the driven wheel side, said automatic transmission having a plurality of gear ranges; said auxiliary equipment being driven with power from said engine; transmitting-and-interrupting means for transmitting and interrupting the power from said engine to said auxiliary equipment, said control system for controlling said transmitting-and-interrupting means to thereby control said auxiliary equipment; first means for determining if said vehicle is in an accelerating state by determining an instantaneous value of a rotational speed ratio of said torque converter in terms of a rotation speed of said output shaft at the driven wheel side of said torque converter divided by a rotation speed of said input shaft at the engine side thereof; second means for interrupting the power from said engine to said auxiliary equipment by said transmitting-and-interrupting means when said vehicle is in said accelerating state under a condition that said instantaneous value of said rotational speed ratio as thus determined of said torque converter is lying in a region where a predetermined value of torque amplification, of said torque converter, is exceeded indicating said accelerating state; a central control circuit; vehicle speed detecting means for feeding said control circuit with a signal representative of an instantaneous value of a vehicle speed; engine throttle opening detecting means for feeding said control circuit with a signal representative of an instantaneous value of an engine throttle opening; a shift map for said automatic transmission; and said shift map having as parameters thereof, said vehicle speed and said engine throttle opening; and said control circuit for controlling the shifting of said automatic transmission in conformity with said shift map.