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    • 22. 发明授权
    • Method and a device for purifying exhaust gas of an internal combustion
engine
    • 内燃机废气净化方法及装置
    • US5979157A
    • 1999-11-09
    • US911532
    • 1997-08-14
    • Yukio KinugasaTakaaki ItouKoichi HoshiKoichi Takeuchi
    • Yukio KinugasaTakaaki ItouKoichi HoshiKoichi Takeuchi
    • F01N3/08F01N3/10F01N3/20F01N3/22F01N3/24F01N3/32F01N9/00F01N13/02F02D41/02F01N3/00
    • F01N3/0238F01N13/009F01N13/0097F01N3/0835F01N3/0871F01N3/0878F01N3/2026F01N3/22F01N3/222F01N3/323F01N9/00F01N2250/12F01N2410/00F01N2430/06F01N2570/16F01N3/32Y02T10/26Y02T10/47
    • A device for purifying exhaust gas includes an HC adsorbent and an exhaust gas purifying catalyst disposed in an exhaust gas passage in this order from the upstream side. The exhaust gas purifying catalyst is provided with an O.sub.2 storage capability, i.e., the exhaust gas purifying catalyst is capable of absorbing oxygen in the exhaust gas when the air-fuel ratio of the exhaust gas is lean, and is capable of releasing the absorbed oxygen when the air-fuel ratio of the exhaust gas becomes rich. When the engine starts, the HC adsorbent adsorbs HC in the exhaust gas. When the temperature of the exhaust gas becomes high, the HC adsorbent releases the adsorbed HC. The device also includes an engine control unit which operates the engine at a lean air-fuel ratio during a predetermined period before the releasing of the HC from the HC adsorbent occurs. Therefore, oxygen is absorbed and stored in the exhaust gas purifying catalyst before the releasing of HC occurs. When the releasing of HC from the HC adsorbent occurs, the air-fuel ratio of the exhaust gas flowing into the exhaust gas purifying catalyst becomes rich due to the HC released from the HC adsorbent. This causes the exhaust gas purifying catalyst to release the absorbed oxygen, and the HC in the exhaust gas is purified by the exhaust gas purifying catalyst using the released oxygen.
    • 废气净化装置包括从上游侧依次排列在废气通道内的HC吸附剂和排气净化催化剂。 废气净化催化剂具有O 2储存能力,即,当废气的空燃比稀的时,废气净化催化剂能够吸收废气中的氧,并且能够释放吸收的氧 当排气的空燃比变浓时, 当发动机启动时,HC吸附剂吸附废气中的HC。 当废气的温度变高时,HC吸附剂释放吸附的HC。 该装置还包括发动机控制单元,其在从HC吸附剂释放HC之前的预定时间段内以稀空燃比操作发动机。 因此,在HC释放出现之前,氧气被吸收并储存在排气净化催化剂中。 当从HC吸附剂中释放出HC时,流入废气净化催化剂的排气的空燃比由于从HC吸附剂释放的HC而变浓。 这使得废气净化催化剂释放吸收的氧,并且通过使用释放的氧气的废气净化催化剂净化废气中的HC。
    • 23. 发明授权
    • Emission control system for an automobile
    • 汽车排放控制系统
    • US5816214A
    • 1998-10-06
    • US622372
    • 1996-03-27
    • Yukio KinugasaToru KidokoroTakaaki Itou
    • Yukio KinugasaToru KidokoroTakaaki Itou
    • F02M33/00B08B15/00F02F7/00F02M25/00F02M35/024F02M35/10
    • B08B15/00F02M25/00F02F7/006F05C2225/08
    • The emission control system of the present invention removes the small amounts of polluting gases released from various parts of the automobile. These polluting gases are released from, for example, fuel oozing out from connections of the pipes in the fuel system, lubricating oil oozing out from engine body, and solvents and adhesives remaining in the interior and exterior parts of the automobile. In the emission control system of the present invention, collectors and suction pipes are provided. The collectors are disposed at the parts of the automobile from where the polluting gases are released in such a manner that the collectors enclose these parts. The suction pipes connect the respective collectors to an intake nose of an air cleaner disposed in an intake air passage of the engine. Therefore, the polluting gases released from various parts of the automobile are drawn into the engine through the respective suction pipes before they diffuse into the atmosphere, and are burned in the engine. Thus, according to the present invention, the polluting gases released from various parts of the automobile are prevented from diffusing into the atmosphere.
    • 本发明的排放控制系统除去从汽车各部分释放的少量污染气体。 这些污染气体例如从燃料系统中的管道的连接处渗出的燃料,从发动机主体渗出的润滑油以及残留在汽车的内部和外部的溶剂和粘合剂释放出来。 在本发明的排放控制系统中,设置有收集器和抽吸管。 收集器被布置在汽车的部分处,其中污染气体被释放,使得收集器围绕这些部件。 抽吸管将各个收集器连接到设置在发动机的进气通道中的空气滤清器的进气口。 因此,从汽车各部分释放的污染气体在扩散到大气中之前通过各个吸入管被吸入发动机,并在发动机中燃烧。 因此,根据本发明,防止从汽车的各个部分释放的污染气体扩散到大气中。