Single Acting Hydraulic Cylinder
Single-acting Hydraulic Cylinder is a type of hydraulic cylinder that can generate linear force and motion in one direction only. This type of cylinder consists of a piston, a cylinder barrel, and one hydraulic port for fluid input. The hydraulic fluid is typically pressurized through the port, which pushes the piston in one direction, and the piston's return motion is achieved through the use of a spring or external force.
Single-acting hydraulic cylinders are commonly used in applications where the load can be easily returned to its original position using a spring or external force. They are also used in situations where the hydraulic pressure is required to move the load in one direction only, such as in the case of lifting, pushing, or pulling heavy loads.
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Due to its unique fuel economy, excellent reliability, and nearly double the service life of a gasoline engine, diesel engines are used almost exclusively in heavy and medium-sized trucks and large passenger vehicles, and in diesel and light and medium-sized passenger vehicles. Use diesel engine. From January to April of this year, the market share of diesel engine in China's auto market has reached 29.82%, and it is as high as 80.08% in the commercial vehicle market. However, due to the downturn of the entire automotive market this year, the growth rate of the commercial vehicle market was not high at 5.65%, so the diesel engine market for vehicles has seen the lowest growth rate since 5.77% since 1999.
The overall market is stronger
The author predicts that the overall trend of the diesel engine market in the second half of the year will reveal a weak pattern, and the growth rate will be 10 to 12 percentage points higher than the first half of the year; the market share of the whole year will be the same as or slightly lower than last year. Specifically, based on data, on the basis of sales in 2004, sales of diesel engines are expected to increase by 9% to 12% year-on-year, approximately 1.42 million to 1.46 million units, which is 0.5% higher than the annual growth of commercial vehicles. 1.5 percentage points.
The main reasons for the strong diesel engine market in the second half of the year are:
First, at the beginning of 2005, over-restricted overloading of road vehicles in many localities rebounded. In order to ensure the achievements made by Chao Chao during the past year, in March the National Leading Group on Overstepping Work Stressed the need to increase efforts to over-treat the work, and on June 20, the General Office of the State Council issued the “Regarding Strengthening of Vehicle Overrun and Overload Control Workâ€. The "news notice" re-emphasizes that it is necessary to intensify the work of overtaking and promote the development of overstepping work. This news is undoubtedly a big plus for the medium to heavy truck market of 12 tons to 19 tons.
Second, on the truck side, due to the huge demand for light trucks, especially light trucks, due to rural transportation and urban logistics, the expansion of the use of light trucks and the diversification of functions will lead to light trucks, especially light truck chassis (non-integrated vehicles. Converted into special vehicles; continue to strengthen; agricultural vehicles and farmers to increase income, the two will have a positive impact on the demand for the card; coal, electricity, oil and other industries are still optimistic about the growth, favorable, the card demand continued to grow. In addition, due to the excellent price/performance ratio of China heavy trucks, especially the competitive advantage in terms of prices in the international market, heavy truck exports will show strong vitality. It is expected that some truck companies will make a difference in this area in the second half of the year.
Thirdly, as far as passenger cars are concerned, because the state has increased the construction and improvement of urban public transport since last year, it has a greater stimulating effect on the development of urban passenger cars; at the same time, the tourist heat is increasing year by year, and the demand for tourist buses has increased, while workers’ and passenger trains have increased. Among them, mainly large passenger cars. Therefore, in the second half of the year, buses continue to sell well.
High-end light and high-power heavy-duty machines are still selling well
From January to April of this year, the domestic truck diesel engine accounted for 87.85% of the entire diesel engine market, so the trend of the truck market determines the trend of the diesel engine market.
From January to April, the sales of high-tonnage light trucks with total cargo mass ranging from 4.5 tons to 6 tons and high-tonnage trucks with output of over 19 tons were both above 22% year-on-year, so the corresponding high-end light diesel engines and high-end high-power heavy-duty diesel engines were The current market hotspots are expected to continue to sell well in the second half of the year.
Four-cylinder machine with supercharged medium-cooling technology continues to strengthen
In the past, only the technology applied on the six-cylinder machine has been widely used in the four-cylinder engine, such as Yuchai's YC4108, YC4110, YC4112, and YC4113. Diesel engine products, and these products have grown rapidly this year. With Chaochai's 4102, QD32 series and Xichai's 4110 series diesel engines adopting supercharged intercooled technology, not only has the power level been improved, but sales have been better than before.
These market performances are mainly due to the rapid growth of China's light commercial vehicles in the past two years. Although the six-cylinder machine has enough power, the problem of external dimensions cannot be matched. The four-cylinder model after the booster technology is used not only in emissions It satisfies the requirements of Euro II and Euro III regulations on a horizontal basis, and it satisfies the requirements of the vehicle very well in terms of external dimensions, matching characteristics, etc. At the same time, it also supports this type of vehicle at the price level. Market price positioning, these factors make the four-cylinder machine model replaced the six-cylinder machine in a specific area.
Mid-heavy diesel engine with high economical efficiency, durability and reliability is continuously optimistic
The new "Automobile Industry Development Policy" technology policy focuses more on energy conservation. Since diesel engines are mainly used in medium- and heavy-duty trucks, the price of diesel has increased in the past two years and the Chinese people have paid special attention to the durability and reliability of goods. Therefore, it is relative to the safety and environmental importance of passenger vehicles and light vehicles. It is said that heavy-duty truck consumers are paying more attention to the economy, durability and reliability of diesel products. The same three good-performance diesel products will continue to look good.
China's diesel engine market is still expected to go strong in the second half of the year