How To Measure The Gap Of The Engine Tool

- Oct 17, 2017 -

How to measure the gap of the Engine Tool
Engine Tool at work, due to high temperature, poor lubrication conditions, the wear and tear failure is often faster than the cylinder wear limit speed. With the Engine Tool wear and tear intensified, the Engine Tool will gradually weaken the elastic force, the gap, the backlash increases, will make the sealing performance worse, resulting in high pressure gas channeling and lubricating oil channeling phenomenon, reduce engine power and Economy. Engine Tools in addition to wear failure, there is a common fracture damage. Due to the large brittleness of the Engine Tool, if the installation method is improper, or the Engine Tool backlash, the end gap is too small and the engine burst, the heavy load will cause the Engine Tool to break. Therefore, the correct selection and installation of Engine Tools.
(1) the measurement of the opening gap, the first time, the Engine Tool placed in the cylinder, and with the piston head to the Engine Tool pushed to the cylinder hole in the Engine Tool reciprocating stroke within the location, and then measured with a thin gauge Open the gap, such as the gap is too poor, you can not use; such as the gap is too small, can be taken out with a fine file file ring mouth end, until meet the requirements so far.
(2) The backlash is the gap formed between the plates after the Engine Tool is mounted on the Engine Tool slot. The backlash is too large to affect the effect of the combustion chamber seal, the small Engine Tool is swollen in the tank, or the elasticity is lost. When the ring should be in the ring groove rolling is not loose is not astringent stagnation is appropriate, can also be used to measure the thickness of the ring and ring groove between the gap, if the backlash big, you can no longer use, the backlash is small, can be Engine Tools are flat and ground to achieve the specified backlash.
The performance of a car Engine Tool is critical to the quality and efficiency of the engine, since the Engine Tool is one of the important parts of the engine. In summary, the plug ring leakage and closed gap detection of the importance and decisiveness. Ring is a mass production, requiring a high efficiency, accuracy and reliability.
The working surface of the Engine Tool shall not be scored, scratched, peeled off, the outer cylindrical surface and the upper and lower end surfaces shall have a fixed finish, the curvature deviation shall not be greater than 0.02-0.04 mm, and the standard sinking amount of the ring in the tank shall not exceed 0.15- 0.25 mm, the Engine Tool's elasticity, the gap is in compliance. In addition, the Engine Tool should also check the light leakage, the Engine Tool will be placed flat in the cylinder, put a small lamp underneath, put a shading board above, and then observe the Engine Tool and the gap between the cylinder wall gap, Whether the contact is good.
The key to the Engine Tool is as follows:
First, the pressure of connecting rod copper sets. Device connecting rod copper sleeve is best to use the press, but also by virtue of the vise, should not hammer with a hammer; copper sleeve on the oil hole or groove and connecting rod on the oil hole to be aligned to ensure its smooth; After the copper sleeve is pressed, the ends of the two ends of the connecting rod should be flat.
Second, the installation of Engine Tools and connecting rod. When installing the Engine Tools and connecting rods, they should be aware of their relative orientation and orientation. The big end of the connecting rod is cut flat, the vortex groove of the piston should be the same side of the big end of the connecting rod; the big end of the connecting rod is cut oblique, and the vortex groove at the top of the piston should be cut with the same side, Piston top with a pointed end, should be to the fuel pump side.
Third, clever installed piston pin. To make the piston pin end and the two piston pin ring interval is flat, fitted with retaining ring.
Fourth, the Engine Tool device. When installing the Engine Tool, pay attention to the azimuth and order of each ring. The first air ring on the piston, usually chrome ring. Second, the third ring mostly to change the ring, there are conical ring. In the case of a cut ring, cut off to the bottom; if the cone ring, engraved with "on" the word side or cone angle should be facing up. The Engine Tool in the tank must not have the phenomenon of stuck; the first air ring opening, not on the piston pin hole and the piston on the top of the vortex groove; adjacent ring opening position should be staggered 90 ~ 120 degrees, to avoid the cylinder Gas leakage, in order to facilitate sealing. After the Engine Tool is loaded, check its opening clearance (end void) and side clearance. The gap is too large, easy to cause leakage, the gap is too small, will occur stuck phenomenon; edge clearance refers to the Engine Tool and ring groove in the height of the gap, it makes the ring in the ring groove can be free to move, This gap should not be too large, otherwise, when the piston moves up and down in the cylinder, the air ring will produce pump oil effect, smooth oil into the combustion chamber, speed up the oil consumption and the formation of a serious coke.