1. The state of diesel engines for domestic construction machinery Currently, the main demand for various types of construction machinery in the domestic power range is between 100141250 and Jia. The domestic diesel engines with power within this range can be roughly classified into the following categories.
The first category began in the 1980s before mass production. In the 1980s, it was improved and developed. Today, the engines are still in production. There are 6120, 6130, and 6135 diesel engines. Most of these diesel engines are natural air intake, and all of them are compared. behind.
The first category was the self-developed 06133 diesel engines of Dingchi 6130, Chaochai, and Shangchai 64 and other diesel engines. These diesel engine performance indicators have improved compared to the first, but there is still a gap between performance reliability and advanced levels.
The first category is the introduction of technology production from abroad in the 1980s and the introduction of foreign joint venture diesel engines in the 1990s. There are the North China Diesel Engine Works Double 0615 series, the Shangchai Caterpillar joint venture production, 121 series, Chongqing Cummins production has the international level of modern production of diesel engines. Is a more advanced diesel engine. However, with the exception of the 61413 series, the series and the Jia 0615 series diesel engine, these diesel engines have been mass-produced, and other series of diesel engines have not formed mass production capacity.
2 Train 0615 series diesel engine was introduced to Weifang Diesel Engine Factory. In 1984, the Austrian company Steyr Corporation Jia 0615 series diesel engine was introduced. After five years of hard work, it passed the acceptance of the State Development Planning Commission in 1989. In 1990, the Steyr Company produced 615 diesel engines for Weichai Factory. Accepted. In 1992, the localization rate of the current Steyr diesel engine reached more than 95 through China National Automobile Co., Ltd., which greatly reduced the production cost and increased the market competitiveness.
Weichai Jia Jia 0615 series diesel engine follows the development trend of the world diesel engine. In the aspects of high performance, high reliability and low emission, we have improved with Steyr and Europe. It will keep the international advanced level and the leading domestic level.
In order to meet the demand of domestic construction machinery for high-grade diesel engines, since 1989, we have actively developed variant products for various types of construction machinery, greatly expanding the application range of Steyr diesel engines, and so far we have developed more than a hundred supporting products. There are more than 40 main supporting manufacturers, of which 210 are used for the development of loaders.
3.061567, 3 diesel engine development rate of 162 Jia, rated speed 220 maximum torque of 843Nm, the maximum torque speed of 1400,150, mainly with the 2150 loader with 1989 began with the construction machinery factory, in 1992 passed the provincial appraisal.
Out of the 6703 improved diesel engine, its performance indicators and technical parameters and 6703 are the same, the internal structure and the 6703 caused, only in the external supporting device is more ideal, the appearance is more beautiful.
The point 1 fuel system adopts a Bosch type high-pressure oil pump equipped with a full-range mechanical governor. Through reasonable matching of the oil supply characteristics and high-efficiency supercharger, the diesel emission is sufficiently large to ensure low smoke emission. The torque reserve.
Flow air filter, and in front of the air filter to increase the level of swirling coarse filter, the larger particle dust in the air intake through the ejector discharge with the exhaust gas, better to avoid early wear of the diesel engine.
The large-flow double-stage oil pump adapts to the front, back, left, and right tilting working environment, and ensures sufficient forced cooling at low speeds. A variety of specifications such as the cooling water tank 47.5,2 and the external blowing cooling air 780840 with a large heat dissipation area can be selected to form a variety of supporting schemes as required.
Throttle switching mechanism Because the 10615 series diesel engine is an imported product, the location of the oil control handle is opposite to the position of the current loader control handle in China. The throttle conversion mechanism was designed to meet the driving habit of our country.
A variety of flywheel flywheel shell elastic coupling plates are counted. Can be connected with 3 61. The front end of the crankshaft can be equipped with air conditioning compressors and other devices through the construction of different structures to develop fixed power 1281 stomach, rated speed 793, the maximum torque speed began to support Shandong bulldozers plant, in 1993 passed the provincial appraisal. Its main structural feature is that it adopts point support to meet the needs of rack modification during bulldozer operation. The fuel system, full-scale governor of high-pressure oil pump is equipped with 27 type supercharger to meet the characteristics of low speed and large torque of bulldozer. The large flow air filter is equipped with a cyclone rough filter and a dust ejection device. Radiating area 54,2 Large cooling water tank can be exchanged with latcher Komatsu, 65 radiator, wide blade large diameter 9840, low speed fan, that is, increase the cooling air volume, reduce fan noise, increase the reliability of the transmission system, reduce Drive power. The power output device was designed to match the torque converter and mechanical transmission of the Yamamoto Komatsu 60 Hill Dozer.
6. Development of water-cooled and medium-cooled construction machinery We have developed a diesel engine for diesel-powered medium-cooled high-power bulldozers with 6165 D, 4 knowledge, 0615, Ding 6, Jia 0615, and its performance indicators are as follows: 0615 D 4 rated power, rated speed Maximum torque 1029 rpm Max torque speed 1200130,1 Jazz 0615 out of 6 Rated power 175 Rated speed 210,Maximum torque 994 Nm,Max torque speed 1400150,1 force,Jia 0615 D8 rated power 180,Rated speed 200,Max torque 10301 Max torque Speed ​​1400 15001! . The design of the intercooler mainly considers that there must be sufficient cooling capacity and good processability in performance, use reliability, good economy, and a short development cycle. The intercooler core is a tube-type structure, and has the same installation size and similar intake tube as the 1300 intercooler core. The water pump pump divides the water into parts to cool the pressurized air, after cooling. The inlet temperature can reach 7080 thermostat using 57; open temperature. The intercooler has the advantages of compact structure, high heat dissipation efficiency, low resistance, relatively inexpensive price, good vibration resistance, etc., and achieves an ideal mid-cooling effect.
The Sylgardian 0615 series of diesel engines for construction machinery has been continuously improved and improved over the past 10 years. It has been widely accepted by the market and has been well received by users. This series of products not only has high reliability, good dynamic performance, low fuel consumption, low emission, but also has good plateau adaptability and environmental protection. It will surely make outstanding contributions to the rapid development of the national economy and the development of the western region.
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