The development process of establishing light duty direct injection diesel engine ring sticking and piston cleanliness test bench and the test method were introduced.

The research results of physicochemical index and serviceability show that the anti-emulsifiability, detergency and anti-foaming property of alkyl salicylate calcium increase with the number of carbon in the alkyl.

The methods of PIBA synthesis and its posttreatment, detergency of PIBA derivatives, the effects of PIBA detergent on CCD formation and the trend of research and application of PIBA were introduced.

In this paper were reported the methods of PIBA synthesis and its post-treatment as well as detergency of PIBA derivatives.

Thermal stability and detergency of rapeseed oil biodiesel

According to CEC L-079-T-97 detergency evaluating method for two-stroke gasoline engine oil(2T oil) which was regulated by ISO EGD standard,a detergency evaluating system of EGD 2T oil was set up.

To evaluate the sediments and detergency of top grade two-stroke cycle engine oils after combustion,a set of equipment was established according to the advanced technology and standards in the world,and some experimental study on three models(M15,J40,J70).

Through laboratory test, nozzle cleanliness bench scale test, lubricating property appraisal, engine bench scale test and actual running experience, the new diesel cleaner exhibits excellent of cleaning, lubricating, antirust property, and resistance to foaming and oxidation.

Surface cleaniness have been improved of strip and cleanliness after annealing meet the need of industrial use.

This paper is to probe into the translation methods from three themes of poems:doing away with the contaminated and recovering to the nature,nihility of all laws,and purity of the nature.