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    • 8. 发明授权
    • Method of reducing feed gas emissions in an internal combustion engine
    • 减少内燃机中原料气排放的方法
    • US5755202A
    • 1998-05-26
    • US738197
    • 1996-10-25
    • Anna StefanopoulouKenneth Roy Butts
    • Anna StefanopoulouKenneth Roy Butts
    • F01L1/34F02D13/02F02D41/00F02D7/00
    • F02D13/0219F01L1/34F02D41/0002F01L2201/00F02D2041/001Y02T10/18Y02T10/42
    • A method of reducing feed gas emissions and improving fuel economy in an internal combustion engine uses a variable cam timing mechanism and an electronically controlled throttle. The method includes: a) predetermining ranges of negligible torque demand, small torque demand, moderate torque demand, high torque demand and maximum torque demand; b) determining actual torque demand; c) using conventional cam phasing and pedal-to-throttle relationship if actual torque demand corresponds with the negligible torque demand range; d) using cam phasing of magnitude in transition between conventional and fully retarded cam phasing and retaining conventional pedal-to-throttle relationship if actual torque demand corresponds with the small torque demand range; e) using fully retarded cam phasing and electronically adjusting throttle position to meet actual torque demand if actual torque demand corresponds with the moderate torque demand range; f) using cam phasing of magnitude in transition between fully retarded and conventional cam phasing and holding throttle position constant if actual torque corresponds with the high torque demand range; and g) using conventional cam phasing and pedal-to-throttle relationship if actual torque corresponds with the maximum torque demand range. Similar schemes are provided for intake advance and exhaust retard strategies.
    • 一种在内燃机中减少进料气体排放并提高燃油经济性的方法使用可变凸轮正时机构和电子控制油门。 该方法包括:a)预先确定扭矩需求可忽略的范围,小扭矩需求,中等转矩需求,高扭矩需求和最大扭矩需求; b)确定实际的扭矩需求; c)如果实际扭矩需求对应于可忽略的扭矩需求范围,则使用传统的凸轮定相和踏板与油门的关系; d)如果实际的扭矩需求对应于小的扭矩需求范围,则使用常规和完全延迟的凸轮定相之间的过渡中的凸轮定相并保持传统的踏板与油门的关系; e)如果实际扭矩需求对应于中等扭矩需求范围,则使用完全延迟的凸轮相位和电子调节节气门位置以满足实际的扭矩需求; f)如果实际扭矩对应于高扭矩需求范围,则使用在完全延迟和常规凸轮相位之间的过渡中的凸轮定相,并且保持节气门位置恒定; 并且g)如果实际扭矩对应于最大扭矩需求范围,则使用传统的凸轮定相和踏板与油门的关系。 为进气提前和排气策略提供了类似的方案。