Selection of internal combustion forklift engine The engine is the heart of the internal combustion forklift. Its power performance, reliability and fuel economy are of vital importance to many important performance indicators of the forklift. Therefore, engine selection is a major issue in forklift design. In this paper, some rough discussions on the selection of the three-ton forklift engine with the largest production and sales volume in internal combustion forklifts are carried out. Vendor Mitsubishi TCM Toyota Komatsu Linde Daewoo Samsung Clark engine model S4S 4JG2 2Z 4D98E GF3L913G DB33A AL30 MDS4S Exhaust volume 3331 3059 3500 3318 3064 3268 2953 3330 The power and reliability of the forklift depend to a large extent on the performance of the engine. The famous foreign forklift manufacturers improve the engine exhaust volume. In addition to adapting to the user's increasing requirements for the efficiency of the forklift, an important aspect is to improve the engine. Working conditions improve reliability and service life (engine failure rate, reliability and service life account for a significant proportion of the overall level of the forklift). In the forklift design, after the basic tonnage related parameters of a model forklift are determined, the required power is certain, such as a three-ton forklift, the lifting weight is 3 tons, the deadweight is 4.3~4.5 tons, and the driving speed is hourly. 20 km (about the same as domestic and foreign products), engine power can be determined in two ways: Pingyi Lu Petroleum & Oil Fittings Co., Ltd. , http://www.bdgatevalve.com
one. Trends in the selection of three-ton forklift engines for internationally renowned forklift manufacturers:
From the development of manufacturing technology of gasoline forklifts in the past 20 years, the domestic forklift production technology before the 1980s was based on the unified design of domestic industrial enterprises and joint industrial institutes at the time, and its level was far behind the international level. In the 1980s, domestic well-known forklift production plants began to introduce forklift manufacturing technology, mainly Japanese technology, such as: Mitsubishi, TCM, etc., the introduction of the three-ton forklift engine, the displacement is about 2.5 liters, For example, Mitsubishi's S4E and TCM's C240 ​​are basically the same as the domestic 490B and 492G engines. However, due to the differences in the quality of engine technology at home and abroad, the technical level of forklifts also has a large gap. In the 1990s, more foreign forklift manufacturers were rushing to the Chinese market. Apart from technology introduction, they mainly represented joint ventures and sole proprietorships. This gives us a more comprehensive understanding of the development of the international forklift technology level, especially the engine selection. Its main feature is to improve the performance of the internal combustion forklift, power performance, reliability, comfort, and reduce emissions, and appropriately increase the engine's exhaust. The displacement and model of the three-ton forklift engine are shown in the following table:
It can be seen from the above table that the current domestic three-ton internal combustion forklift engine exhaust volume is about 3 liters, while the domestic three-ton forklift still maintains around 2.5 liters (mainstream products), in the domestic engine technology level, quality and reliability. Sex, emission standards, etc. are not as good as foreign products, the displacement is 20% lower than foreign countries. It can be seen that the gap between the three tons of forklifts at home and abroad.
Formula (a)
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