Yuchai YC6A Series, Руководство по эксплуатации и техническому обслуживанию

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3.2.4
配气机构
Air distribution structure
配气机构采用顶置式配气机构，由气门组和气门传动组构成。气门组包括气门、气门弹簧、
气门锁夹、气门导管、气门座。气门传动组包括凸轮轴、气门挺杆、推杆、摇臂、凸轮轴正时
齿轮等。
Air distribution structure adopts overhead air distribution structure and it consists of valve
group and valve transmission group. The valve group includes valve, valve spring, valve lock,
valve duct and valve seat. Valve transmission group includes camshaft, valve lifter, push rod,
rocker arm and camshaft timing gear.
气门组零件装在气缸盖上。进、排气门均由两种材料通过摩擦焊接而成，杆部材料相同
，为硅铬合金，排气门盘锥面上还堆焊有
F203
合金。
The valve group parts are installed on cylinder head. Intake valve and exhaust valve are
welded with two kinds of materials; the material of lever is silicochromium. F203 alloy is
welded on exhaust valve cone
为保证柴油机的正常工作状态，用户应按要求定期检查调整气门间隙。冷态时进气门的
间隙为
0.4±0.05mm
。排气门的间隙为
0.45±0.05mm
。气门间隙检查调整的方法是
:
把曲轴转
到第一缸压缩上止点位置，此时可检查调整 1 、 2 、 3 、 6 、 7 、 10 气门，再把曲轴转过 360° ，
此时可检查
4
、
5
、
8
、
9
、
11
、
12
气门，气门间隙的调整可通过调整气门调整螺钉来实现，调
整时先把锁紧螺母松脱，用起子把气门调整螺钉按需要旋进或旋出，然后用厚薄规检查摇臂
与气门端的间隙，符合要求后拧紧锁紧螺母（图 2—4 ）。
In order to ensure the normal working of diesel engine, users should check valve clearance
according to requirements regularly. When the engine is in a cold state, the clearance of
intake valve should be 0.4±0.05 mm and the clearance of exhaust valve should be 0.45±0.05
mm, The method of checking and adjusting the valve clearances is as follows: Rotate the