| 摘要 |
An improved compressor capacity control method selectively overrides a normal capacity control during periods of vehicle acceleration to reduce engine exhaust emissions. The capacity override is invoked when the rate of engine throttle movement exceeds a predefined rate (106), provided that the load imposed by the compressor is sufficiently high (102) and the vehicle speed is greater than a minimum value (104). Once invoked, the override reduces the compressor capacity to a predetermined level (110), and measures the elapsed time (108, 116, 120). The override is maintained for at least a minimum time period that ensures an emission benefit (112), after which the vehicle speed is monitored to determine the extent of the acceleration (114). The override is terminated when the rate of increase in vehicle speed falls below a reference rate (114, 122, 124, 126), or when the elapsed time exceeds a reference time (118, 124, 126), whichever occurs first. <IMAGE>
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