What is the formula of single cylinder valve adjustment?

The formula of single cylinder valve adjustment is the ignition sequence of inline four cylinders 1-3-4-2. According to the formula, one cylinder can adjust the intake and exhaust valves at the top dead center, three cylinders can adjust the exhaust valves, four cylinders can't, two cylinders can adjust the intake valves, and then four cylinders can adjust the other valves at the top dead center.

Remove the cylinder head cover when the diesel engine is cold; Rotate the flywheel so that the top dead center line on the flywheel is aligned with the pointer line on the water tank, so that the piston is at the top dead center position of the compression stroke; The thickness gauge measures the clearance between the end of the valve stem and the rocker arm.

If the thickness gauge cannot be inserted or there is still a big gap after it is inserted, the valve clearance needs to be adjusted. When the S 195 diesel engine is cold, the intake valve clearance is 0.3 ~ 0.4 ~ 0.5 mm, and the exhaust valve clearance is 0.4 ~ 0.5 mm. ..

Single-cylinder valve adjusting method

Loosen the lock nut of the valve clearance adjusting screw, twist the adjusting screw, measure with a thickness gauge until the measured value is consistent with the specified value, and tighten the lock nut while keeping the adjusting screw fixed; When adjusting the clearance between the intake valve and the exhaust valve, turn the crankshaft several times, and then measure the clearance. If there is any change, it should be readjusted.

In order to improve the efficiency of intake and exhaust, multi-valve technology is often used. It is common that each cylinder is equipped with four valves (there are also three or five valves in a single cylinder, and the principle is the same, such as the engine of Audi A6). There are * * valves 16 in the four cylinders, and "16V" often seen in automobile data is the engine *** 16. This multi-valve structure is easy to form a compact combustion chamber, and the fuel injector is arranged in the center, which can make the fuel-air mixture burn faster.