JPH01102403U

JPH01102403U -

Info

Publication number: JPH01102403U
Application number: JP19773087U
Authority: JP
Priority date: 1987-12-26
Filing date: 1987-12-26
Publication date: 1989-07-11

Description

[Brief explanation of the drawing]

第１図はこの考案のカム軸駆動構造をＶ型エン
ジン前端からみた図、第２図はＶ型エンジン上面
からみた図、第３図は従来のカム軸駆動構造を示
す図、第４図は第３図を上面からみた図である。１……Ｖ型シリンダーブロツク、２Ａ，２Ｂ，
２２Ｂ……シリンダーヘツド、３Ｎ，４Ｎ，２４
Ｎ……吸気弁用カム軸、３Ｅ，４Ｅ，２４Ｅ……
排気弁用カム軸、５Ａ，５Ｂ，２５Ｂ……二段型
アイドラスプロケツト、７……１次タイミングチ
エーン、８，９……２次タイミングチエーン、１
０……シリンダー位置。 Figure 1 shows the camshaft drive structure of this invention as seen from the front end of the V-type engine, Figure 2 shows the top of the V-type engine, Figure 3 shows the conventional camshaft drive structure, and Figure 4 shows the camshaft drive structure of this invention. FIG. 3 is a top view of FIG. 3; 1...V-type cylinder block, 2A, 2B,
22B...Cylinder head, 3N, 4N, 24
N...Intake valve camshaft, 3E, 4E, 24E...
Exhaust valve camshaft, 5A, 5B, 25B... Two-stage idler sprocket, 7... Primary timing chain, 8, 9... Secondary timing chain, 1
0...Cylinder position.

Claims

[Scope of Claim for Utility Model Registration] A cylinder block in which one of the left and right banks of a cylinder row arranged in a V-shape is offset rearward, and at least one camshaft is installed in a cylinder head attached to the left and right banks of the cylinder block. In addition, each bank has a two-stage idler sprocket, each idler sprocket and a crank gear are interlocked by a single primary timing chain, and each idler sprocket and cam gear are linked with each other by a single primary timing chain. In a V-type engine in which each bank is interlocked with a secondary timing chain, the primary timing chain is placed in front of a two-stage idler sprocket on the bank side that is offset to the rear of the cylinder row, and on the front side of the two-stage idler sprocket on the other bank side. A camshaft drive device for a V-type engine, characterized in that the two-stage idler sprocket is disposed on the rear side of the two-stage idler sprocket so as to be connected to the two-stage idler sprocket.