Forklift Parts Yanmar Engine Parts Piston For 4TNV94 Excavator Diesel Engine

Forklift Parts Yanmar Engine Parts Piston For 4TNV94 Excavator Diesel Engine

Engine Spare Parts Piston for Yanmar 4TNV94

The skirt shape is generally barrel - oval. The axis of the barrel coincides with the axis of the piston. The piston section perpendicular to the axis is elliptic and the short axis is along the direction of the piston pin. Some piston skirt made of multi - stage continuous elliptic cone, multi - stage continuous special circle. The advantages of barrel skirt are uniform machine oil, tensile cylinder, anti - channeling oil, oil film bearing capacity, reduce friction work and friction loss.

However, determining the best profile is an extremely complicated process that requires repeated experiments and often takes a long time. The traditional method is to analyze the temperature field and stiffness of the piston, use the finite element method and draw a piston profile based on experience, then load the obtained test samples into the engine for piston wear test, and observe the wear marks on the piston and cylinder liner. After successive approximation, the best piston profile can be determined. But due to the movement of the piston, the thermal deformation caused by different kinds of relevant factors, the piston is likely to be composed of cylinder head bolt tightening torque, the uneven cooling and the cylinder wall temperature distribution of the influence of the deformation of the cylinder wall, as well as each cylinder combustion uneven, and the characteristics of piston itself (such as stiffness, the expansion of the automatic control piston thermal expansion rate varies with the piston section) is the determination of type surface increased the difficulty.

The composite material is now applied to the surface of the smaller test piston so that the clearance between the piston skirt and the cylinder wall is close to zero. Wear mark test was carried out at the maximum power of the engine. The profile determined by the composite material left after the test is taken as the final piston profile. In this way, only one abrasion test is needed to determine the best piston profile. In addition, the wear strength can be quantitatively analyzed from the wear marks of the piston.

Product Description

Our Advantages

1. Samples are welcome for production.
2. Enough types of stock
3. Quick and safe delivery ,Various of transportation way: Sea, Air, Bus, Express, etc
4. High quality with competitive price
5. We can develop new items for you especially
6. We have more than 10 years in construction machinery parts in Oversea market
7. Honesty and trustworthiness in business
8. Positive feedback from abroad and domestic market
9. Standard packing or according to your specification requests
10. Looking forward to deep cooperation with sincere partner and your satisfaction is our pleasure to maintain momentum going forward


FAQ

1. You are a trader or a manufacture?
We are an industry and trade integration business, our factory located on Fujian Province and our sales department is in City centre of Guangzhou.

2. How can I be sure the part will fit my excavator?
Give us correct model number/machine serial number/ any numbers on the parts itself. Or measure the parts give us dimension or drawing

3. How about the payment terms?
We usually accept T/T or L/C. other terms also could be negotiated.

4. What is your minimum order?
It depends on what you are buying. Normally, our minimum order is USD5000. one 20’ full container and LCL container (less than a container load) can be acceptable.

Our Product Range