초록 ▼

A control system for engine-driven vehicle accessories generates sets of values representing a recent history of the engine loading and of the operational status of the accessories. History factors are derived from the sets of values. The accessories are controlled as a function of sensed parameters

A control system for engine-driven vehicle accessories generates sets of values representing a recent history of the engine loading and of the operational status of the accessories. History factors are derived from the sets of values. The accessories are controlled as a function of sensed parameters and of comparisons between the history factors. The sets of values are periodically updated.

대표청구항 ▼

A method for controlling the operation of a vehicle air conditioning compressor driven by an engine via engageable and disengageable clutch, the method comprising: (a) periodically sensing loading of the engine and generating a plurality of engine load values, each representing the engine loading at

A method for controlling the operation of a vehicle air conditioning compressor driven by an engine via engageable and disengageable clutch, the method comprising: (a) periodically sensing loading of the engine and generating a plurality of engine load values, each representing the engine loading at a particular instant; (b) storing a set of said load values in a corresponding first set of memory locations; (c) deriving an engine loading factor from the set of stored load values; (d) storing a set of engagement values in a corresponding set of memory locations, each engagement value representing an engagement status of the clutch at a certain instant; (e) deriving an engagement history factor from the set of stored engagement values; (f) comparing the engine loading factor with the engagement history factor; and (g) controlling engagement of the clutch, depending upon the relationship between the compared factors.