论文。汽车发动机保养.doc

Car engine maintenance 1. Using appropriate quality level of lubricating oil for gasoline engines should be selected according to the additional means of the intake and exhaust systems and conditions of use SD - SF level gasoline engine oil,; diesel engine depends on the mechanical load selected CB - of CD grade diesel oil, selection criteria not less than the the manufacturer specified requirements prevail. Given 2 regularly change the oil and filter any quality grade of oil in the process of using oil quality will change. To a certain mileage, performance deterioration, give the engine bring all sorts of problems. In order to avoid the occurrence of the fault, the conditions of use should be read in conjunction with regular oil changes and oil medium (generally Dipstick ceiling as well). The oil from the pores of the filter by solid particles and viscous oil was collected in the filter. If the filter is clogged, the oil can not through the filter, the filter will burst open the safety valve, through the bypass valve, still the dirt back to the lubricating parts, prompting engine wear, internal pollution levels. 3. Keep the crankcase ventilation is good now, most of the gasoline engine are equipped with a PCV valve (positive crankcase ventilation device) to cause the engine ventilation, but the blowby contaminants "are deposited around the PCV valve, the valve is clogged if th