公开(公告)号：US5004068A

公开(公告)日：1991-04-02

申请号：US446766

申请日：1989-12-06

申请人： Toshitsugu Sase ,  Michiaki Matsuda ,  Kiyoshi Yanagisawa ,  Mitsuru Maeda

发明人： Toshitsugu Sase ,  Michiaki Matsuda ,  Kiyoshi Yanagisawa ,  Mitsuru Maeda

IPC分类号： F01N1/00 ,  F01N1/02

CPC分类号： F01N1/006 ,  F01N1/003 ,  F01N1/02 ,  F01N1/023 ,  F01N2490/16

摘要： A muffler is constructed to have a tubular perforated plate within its cavity so as to divide the cavity into an outer resonant cavity and an inner resonant cavity, to thereby provide two resonant frequencies. The tubular perforated plate is formed in the shape of a funnel.

公开(公告)号：US5051077A

公开(公告)日：1991-09-24

申请号：US446292

申请日：1989-12-05

申请人： Kiyoshi Yanagisawa ,  Mitsuru Maeda ,  Yoshiyuki Maruta ,  Toshitsugu Sase

发明人： Kiyoshi Yanagisawa ,  Mitsuru Maeda ,  Yoshiyuki Maruta ,  Toshitsugu Sase

IPC分类号： F04C18/16 ,  F04C29/12

CPC分类号： F04C29/12 ,  F04C18/16

摘要： The present invention is drawn to a screw compressor having a wide operating range with respect to flow rate and pressure ratio, wherein a discharge opening portion of a casing is provided with a generally tapered notch portion so that compressed gas is gradually discharged from a certain fixed point where a volume ratio of one groove defined by rotors and the casing is smaller than an inherent built-in volume ratio. Since the present invention is arranged in the above-mentioned manner, the flow of the gas at the discharge opening portion is reduced by the notch portion which is readily formed. Thereby the variation range of the pressure (the amplitude of pulsation of the pressure) is decreased and the noise level is lowered. Further, a loss of pressure resulting from the rapid flow of the gas is restricted to thereby widen a range of preferable performance of the compressor.

公开(公告)号：US5457290A

公开(公告)日：1995-10-10

申请号：US272633

申请日：1994-07-11

申请人： Toshitsugu Sase ,  Michiaki Matsuda

发明人： Toshitsugu Sase ,  Michiaki Matsuda

IPC分类号： F01N3/24 ,  F01N1/08 ,  F01N3/28 ,  F01N13/04 ,  F01N1/24

CPC分类号： F01N3/2885 ,  F01N1/089 ,  F01N13/017 ,  F01N2230/04 ,  F01N2490/02 ,  F01N2490/04 ,  F01N2570/04 ,  F01N2570/14

摘要： A catalyzer-containing muffler for treating exhaust gas from an engine is disclosed. The muffler includes an outer casing defining a closed space therein and having an inlet pipe and an outlet pipe for introducing and discharging the exhaust gas into and out of the outer casing, respectively. At least one partition wall is provided so as to divide the closed space of the outer casing into two or more spaces. At least one penetration pipe is provided through each of the partition walls for placing the divided spaces in communication with each other, and a catalyzer is provided inside at least one of the penetrating pipes. Exhaust gas noise is thus reduced and at the same time toxic substances such as NO.sub.x or SO.sub.x are removed by the muffler by a single structure.

摘要翻译： 公开了一种用于处理发动机废气的含催化剂的消声器。 消声器包括在其中限定封闭空间的外壳，并且具有用于分别将废气引入和排出外壳的入口管和出口管。 至少一个分隔壁设置成将外壳的封闭空间分成两个或更多个空间。 至少一个穿透管通过每个隔壁设置，用于将分开的空间彼此连通，并且催化剂设置在至少一个穿透管的内部。 因此排气噪声降低，同时消声器通过单一结构除去诸如NOx或SOx的有毒物质。