| 摘要 |
<p>1,183,137. Treating exhaust gases. SOC. ANON. AUTOMOBILES CITROEN. Nov. 12, 1968 [Nov.17, 1967], No.53472/68. Heading F1B. In a post-combustion purifier for an I. C. engine comprising a secondary air pump connected through a supply pipe-line to an air distributer communicating in turn with air injection pipes each opening into a respective engine exhaust valve pocket, the air distributer consists of a flat plate secured with the interposition of gaskets between the exhaust manifold and the cylinder head, holes for the passage of exhaust gas and secondary air distributing ducts being formed in the plate, and each distributing duct communicating on the one hand with an air injection pipe housed completely in the cylinder head and on the other hand with an air inlet orifice connected to the supply pipe-line. The flat plate 7, Figs. 1 and 7, forming the secondary air distributer is interposed, together with gaskets 8, 9, between the cylinder head 1 and the exhaust manifold 2. The exhaust manifold is unmodified and the cylinder head is modified only by being provided with tapped holes 27 each receiving a stainless steel pipe 25 projecting into a respective exhaust valve pocket 22 so as to direct the secondary air through orifices 26 towards the shank of the exhaust valve (not shown). The plate 7 is provided with holes 21 to allow the exhaust gases to pass to the exhaust manifold 2. Secondary air supplied by a pump 3 driven from the engine passes via a pipe 4 and an inlet flange 5 to an inlet port 14 in the plate 7 and thence via a channel 15 and branch channels 16-19 to the respective pipes 25. The channels formed in the face 7c of the plate 7 may be replaced by ducts formed within the plate.</p> |
