cylinder head

The cylinder head is mounted on the upper surface of the cylinder block, and the cylinder is sealed from the upper portion to constitute a combustion chamber. It is often in contact with high temperature and high pressure gas and is therefore subject to large thermal and mechanical loads. The cylinder head of the water-cooled engine is internally provided with a cooling water jacket, and the cooling water hole at the lower end surface of the cylinder head communicates with the cooling water hole of the cylinder block. The circulating water is used to cool a high temperature portion such as a combustion chamber.
The cylinder head is mounted on the upper side of the cylinder block to seal the cylinder from the upper portion and constitute a combustion chamber. It is often in contact with high temperature and high pressure gas and is therefore subject to large thermal and mechanical loads. The cylinder head of the water-cooled engine is internally provided with a cooling water jacket, and the cooling water hole at the lower end surface of the cylinder head communicates with the cooling water hole of the cylinder block. The circulating water is used to cool a high temperature portion such as a combustion chamber.
The cylinder head is also equipped with inlet and exhaust valve seats, valve guide holes for installing inlet and exhaust valves, as well as intake and exhaust passages. The cylinder head of the gasoline engine is machined with a hole for installing a spark plug, and the cylinder head of the diesel engine is machined with a hole for installing the injector. A camshaft bearing bore is also formed in the cylinder head of the overhead camshaft engine for mounting the camshaft.

The cylinder head is generally cast from gray cast iron or alloy cast iron. The aluminum alloy has good thermal conductivity and is beneficial to increase the compression ratio. Therefore, the aluminum alloy cylinder head has been used more and more in recent years.

The cylinder head is a component of the combustion chamber. The shape of the combustion chamber has a great influence on the operation of the engine. Because of the different combustion modes of the gasoline engine and the diesel engine, the parts of the cylinder head that make up the combustion chamber are quite different. The combustion chamber of the gasoline engine is mainly on the cylinder head, and the combustion chamber of the diesel engine is mainly in the pit at the top of the piston.

What are the auto parts?

Engine parts: cylinder head, body, oil sump, etc.;
Crank and link mechanism: piston, connecting rod, crankshaft, connecting rod, crankshaft, piston ring, etc.;
Gas distribution mechanism: camshaft, intake valve, exhaust valve, rocker arm, rocker shaft, tappet, push rod, etc.;
Intake system: air filter, throttle, intake resonator, intake manifold, etc.;
Exhaust system: three-way catalyst, exhaust manifold, exhaust pipe;
Drive train accessories: auto parts flywheel, pressure plate, clutch plate, transmission, shifting shift control mechanism, drive shaft (universal joint), wheel hub, etc.
Brake system accessories: brake master cylinder, brake cylinder, vacuum booster, brake pedal assembly, brake disc, brake drum, brake pad, brake oil pipe, ABS pump, etc.;
Steering gear accessories: steering knuckle, steering gear, steering column, steering wheel, steering lever, etc.;
Driving accessories: steel ring, tires, suspension;
Hanging accessories: front axle, rear axle, swing arm, ball head, shock absorber, coil spring, etc.;
Ignition accessories: spark plug, high voltage line, ignition coil, ignition switch, ignition module, etc.;
Fuel system accessories: fuel pump, fuel pipe, fuel filter, fuel injector, oil pressure regulator, fuel tank, etc.;
Cooling system accessories: water pump, water pipe, radiator (water tank), radiator fan;
Lubrication accessories: oil pump, oil filter, oil pressure sensor;
Electrical instrument accessories: sensors, lamps, ECUs, switches, air conditioners, wire harnesses, fuses, motors, relays, speakers, actuators;
Lamps: decorative lights, anti-fog lights, indoor lights, headlights, front turn signals, side turn signals, rear combination lights, license plate lights, various types of light bulbs;
Switch type: combination switch, glass lift switch, temperature control switch, etc.;
Air conditioning: compressors, condensers, drying bottles, air conditioning pipes, evaporation boxes, blowers, air conditioning fans;
Sensors: water temperature sensor, intake pressure sensor, intake air temperature sensor, air flow meter, oil pressure sensor, oxygen sensor, knock sensor, etc.
Other accessories: airbags, seat belts, etc.