Camshaft drive (shafts), mounted in the cylinder head is carried by a toothed belt from the drive gear to the crankshaft.
The cylinder head is made of light metal alloy and bolted to the cylinder block. The crankshaft rotates in the cylinder block in five main bearings. The axial clearance of the crankshaft is regulated by thrust half rings. An oil pan is attached to the bottom of the cylinder block, into which engine oil flows, which is necessary for lubricating and cooling the engine. The engines under consideration use a cross-flow scheme: the air-fuel mixture enters the cylinders from one side of the engine, and the exhaust gases are removed from the other. With this engine design, the filling of the cylinders with a fuel-air mixture and the removal of combustion products are significantly improved.
1.0 XU series engines (except for XU10J4R engine)
1.0a Engine XU102C/K
1.06 XU10J4R engine with two camshafts