Suzuki Motor Corporation

Suzuki Kabushiki Kaisha

Fumikazu Kimata

Toyofumi Tsuda

Hiromichi Takewaki

Hidehiko Yoshioka

Jun Ito

Nobutoshi Konagai

Kosei Yamamoto

Tetsushi Achiwa

Kazuya Miura

Ruri Higuchi

Takayuki Naoshima

Provided is a method for stabilizing a size of a platinum hydroxide polymer capable of maintaining solution stability of a platinum hydroxide polymer in a solution. The method may include adding Zr ions to a solution containing a platinum hydroxide polymer at a Zr/Pt ratio of 1.0 to 40 in terms of molar concentration ratio.

Method for stabilizing size of platinum hydroxide polymer

Provided is a method for producing a catalyst for purification of exhaust gas, including the steps of: adding Zr ions to a solution containing a platinum hydroxide polymer; diluting the solution to which the Zr ions are added by using an aqueous ammonium acetate solution; immersing a support made of AlO, SiO, CeO, ZrO, or a composite oxide of any ones of these oxides in the diluted solution, followed by heating at 60 to 70&#xb0; C., to thereby support the platinum hydroxide polymer on the support; and calcining the support, on which the platinum hydroxide polymer is supported, at 150 to 800&#xb0; C.

Method for producing catalyst for purification of exhaust gas

An outboard motor includes a multi-cylinder engine which includes cylinders longitudinally oriented and vertically paralleled in a cylinder block, a cylinder head arranged at a rearward position of the cylinder blocks, and a crankcase arranged at a forward position of the cylinder block, the cylinder head having an outlet of an exhaust port at one side thereof. An exhaust system for the outboard motor includes an exhaust manifold which communicates the outlet of the exhaust port with an exhaust outlet opening, the exhaust manifold including a first exhaust gas passage extending in a vertical direction for gathering exhaust gas discharged from the outlet of each exhaust port and a second exhaust gas passage extending in a vertical direction adjacently to the first exhaust gas passage, and a catalyst unit is provided on the way of the second exhaust gas passage.

Exhaust system of outboard motor

An object of the present invention is to provide an exhaust gas purification catalyst which can minimize the separation of the catalyst layer due to heat and vibration, can suppress thermal deterioration of the catalytic substance, and can exhibit excellent purification capabilities under severe conditions. Specifically, the present invention relates to an exhaust gas purification catalyst wherein an undercoat layer comprising a heat-resistant inorganic oxide having an oxygen-absorbing substance added thereto is formed on a surface of a metallic carrier, and a catalyst-carrying layer is formed on the undercoat layer.

Exhaust gas purification catalyst for internal combustion

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Hamamatsu, Japan

Fumikazu Kimata