Yuchai won the prize for progress in science and technology in Yulin City, a number of

Learned from the Yulin municipal government, declared "Yuchai engine manufacturing quality engineering key technology development and application of" iron coated sand casting cylinder technology research "project won the 2014 annual Yulin science and technology progress award.

The development and application of the key technology of manufacturing quality engineering project is the engine for environmental governance and environmental protection requirements, mainly focus on the key technology of quality control of energy saving and emission reduction in the manufacturing process of engine developmentresearch, key technology through the system research of engine research and design,casting, machining and assembly to form a suitable engine manufacturing quality control technology. The purpose is to improve the reliability of the engine life, reduce the weight loss rate, break the engine manufacturing process quality control technology bottleneck.

"The project" Research on technology of iron coated sand casting cylinder is the first use of iron coated sand process cylinder, a new field of cylinder body production. The production of products with high precision, good mechanical performance, save labor,material and equipment, low production cost advantages. The use of the process of production of the D30 cylinder wall thickness can be reduced by 15%, weight decreased from 131kg to 126kg, reduce the 5kg/, realize the lightweight, reduce the production cost;and the casting yield reached more than 83.75%, than the original sand casting processincreased by 22%; the casting rejection rate than the static pressure automatic productionbody scrap rate decreased by 2 percentage points.

It is understood that the recognition technology innovation award 29 items, including first prize 5, two prize 10, three prize 14.

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