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    • 6. 发明授权
    • Evaporative fuel-purging control system for internal combustion engines
    • 内燃机蒸发式燃油净化控制系统
    • US5195495A
    • 1993-03-23
    • US921158
    • 1992-07-29
    • Masakazu KitamotoFumio HosodaHideo MoriwakiSachito Fujimoto
    • Masakazu KitamotoFumio HosodaHideo MoriwakiSachito Fujimoto
    • F02D41/00F02M25/08
    • F02D41/0045F02M25/08F02D41/0032F02M2025/0845
    • An evaporative fuel-purging control system for an internal combustion engine having a canister in which evaporative fuel from a fuel tank is adsorbed. One or more purging control valves are arranged across a purging pipe extending between the canister and an intake system. An ECU integrates an estimated value of a flow rate of evaporative fuel supplied to the engine, which is estimated as a purging flow rate in the purging pipe, in accordance with engine operating conditions when a specific one of the purging control valves is opened to thereby obtain an integrated purging flow rate value, and subtracts a predetermined decremental value from the integrated purging flow rate value when the specific one purging control valve is closed. When the integrated purging flow rate value is equal to or smaller than a predetermined lower limit value, the ECU decreases the flow rate of the evaporative fuel supplied to the intake system, based on the integrated purging flow rate value obtained above. When an air-fuel ratio correction coefficient value is equal to or greater than a predetermined value and at the same time the integrated purging flow rate value is equal to or greater than a predetermined value, the ECU increases the flow rate, based upon the integrated purging flow rate value.
    • 一种用于内燃机的蒸发燃料清除控制系统,其具有吸附来自燃料箱的蒸发燃料的罐。 一个或多个清洗控制阀布置在在罐和进气系统之间延伸的吹扫管上。 ECU根据发动机的运转条件,将特定的排气控制阀打开时的发动机运转状态,估计为排气管内的净化流量的估计值,推定为发动机供给的蒸发燃料的流量的估计值 获得积分净化流量值,并且当特定的一个净化控制阀关闭时从积分净化流量值减去预定的减量值。 当积分净化流量值等于或小于预定下限值时,ECU基于上面获得的积分净化流量值来降低供给到进气系统的蒸发燃料的流量。 当空燃比校正系数值等于或大于预定值,并且同时积分净化流量值等于或大于预定值时,ECU基于积分 净化流量值。
    • 8. 发明授权
    • Evaporative fuel-purging control system for internal combustion engines
    • 内燃机蒸发式燃油净化控制系统
    • US5216998A
    • 1993-06-08
    • US812722
    • 1991-12-23
    • Fumio HosodaSachito FujimotoMasakazu KitamotoKazumi Yamazaki
    • Fumio HosodaSachito FujimotoMasakazu KitamotoKazumi Yamazaki
    • F02D41/14F02D41/00F02M25/08
    • F02D41/0032F02M25/08
    • An evaporative fuel-purging control system for an internal combustion engine having a canister in which evaporative fuel from a fuel tank is absorped. Purge control valves are arranged between the canister and the intake system of the engine for controlling the flow rate of evaporative fuel supplied from the canister to the intake system. An ECU is responsive to an output from an exhaust gas ingredient concentration sensor arranged in the exhaust system of the engine for calculating an air-fuel ratio correction coefficient, based upon the output from the exhaust gas ingredient concentration sensor and controlling the air-fuel ratio of a mixture supplied to the engine by the use of the air-fuel ratio correction coefficient. The ECU calculates an average value of the air-fuel ratio correction coefficient, and is responsive to the calculated average value for controlling the purge control valves.
    • 一种用于内燃机的蒸发燃料净化控制系统,其具有吸收来自燃料箱的蒸发燃料的罐。 吹扫控制阀布置在发动机的罐和进气系统之间,用于控制从罐向进气系统供应的蒸发燃料的流量。 ECU根据排气成分浓度传感器的输出响应于发动机的排气系统中的输出,用于根据排气成分浓度传感器的输出计算空燃比校正系数,并控制空燃比 通过使用空燃比校正系数提供给发动机的混合物。 ECU计算空燃比校正系数的平均值,并响应计算出的平均值来控制排气控制阀。