With continuous development of two-stroke gasoline engine and restriction on fuelemission, several specification of two-stroke gasoline engine oil have been formed. Thespecification of two-stroke gasoline engine oil will gradually match JASO and ISO.
In China,in order to keep the rapid development of motorcycle industry, to improve the performance ofmotorcycle and to carry out specification of emission, two-stroke gasoline engine fuel withgood performance of detergency, lubrication, emission and anti-jam, is urgently required.
The sequence Ⅵ test is used for evaluating "the improving on fuel economy" of energy-conserving engine oils relative to the reference oil (HR oil) by using a specified Buick 3.8 L V-6 spark-ignition engine on a dynamometer under the same operating conditions.
The gasoline engine could be operated in HCCI combustion mode at a speed range of 800-2 200 r/min and load, indicated mean effective pressure (IMEP) range of 0.1-0.53 MPa.
Comparative experiments of oil and water-cooling were performed on a 4-cylinder automotive gasoline engine and a single-cylinder direct injection Diesel engine.
The sub-chamber type gasoline engine was suggested to be a type of clean engine, but the presence of residual gas in the sub-chamber was a serious fault.
The history of leaded gasoline and its contribution to gasoline engine are reviewed and the golbal trend in gasoline unleadization is reported, to explain that it is an urgent necessity to extend the use of unleaded gasoline in China, also some suggestions on the execution steps are put forward in this paper.
The preparation of a water cooling two stroke gasoline engine oil is introduced. It was formulated by base oil which composed of mineral oil, solvent and polyisobutylene, and additives including ashless cleaning dispersant, anticorrosion agent, antioxidant and friction modifier, etc. The engine oil has passed ASTM D4858-88, D4863-88 and NMMA TC WⅡ engine procedure tests and met the specification of TC WⅡ water cooling two stroke gasoline engine oil.
As the development of scientific technolog and auto-industry, modern industries widely use high compression ratio gas motor and purifying system. In civil and overseas markets the demand of high mark unlead qasoline continously increases in order to improve utilization rate of gas motor, to protect environment, distribute and save fuel reasonably and improve the economy of fuel oil. Bases on its present operation condition and produt type (now can produce 90 # ,93 # unlead gasoline), to fit this develope...