JB cylinder parsing engine basic parameters

R&d center learned that JB cylinder engine including the parameters of the engine cylinder, cylinder arrangement, valve, displacement, maximum output power, the maximum torque. Cylinder count: the number of automobile engine cylinder is commonly used,,,,, cylinder. Litres of the following engine cylinder is commonly used, displacement. Generally for cylinder engine, litres of around engine generally for cylinder, l for cylinder,. Rise above with cylinder engine. In general, under the same diameter, number of cylinders, the displacement is larger, the higher the power; Under the same displacement, the more number of cylinders, the smaller the diameter, rotational speed can be improved, thereby gaining greater power to ascend. Cylinder arrangement: under general cylinder engine cylinder with inline arrangement, a cylinder engine also has a straight way. Array of engine cylinder block into the parlour, cylinder block, cylinder head and crankshaft of simple structure, low manufacturing cost, low speed torque characteristic is good, less fuel consumption, compact size, and apply more extensive, the disadvantage is that the power is low. Straight cylinder of dynamic balance is good, the vibration is relatively small. Mostly to the cylinder engine adopts v-shaped arrangement, V four columns stagger arrangement perspective, namely cylinder body is compact, V engine size length and height, decorate rise very convenient. V engine structure is very complex, the manufacturing cost is very high, so use less, V engine too overweight, only a very few limousines. Valve number: domestic engine USES mostly each cylinder valve, namely an inlet valve, an exhaust port; Foreign car engine widely used per cylinder valve structure, the inlet valve, exhaust valve, improve the efficiency of the inlet and exhaust; Some foreign companies began to adopt each cylinder valve structure, namely the inlet valve, exhaust valve, main effect is to increase the volume, make the combustion more thoroughly. Valve number is not the more the better, valve can improve the efficiency of air intake, but the structure is extremely complex, processing difficulties, using less, domestic production of the new jetta adopts five valve engine. Displacement: cylinder work volume refers to the piston top dead center to check points under the sweep gas volume, also known as single cylinder displacement, it depends on the bore and piston stroke. Engine displacement is the sum of each cylinder working volume, commonly used in ( L） To represent. Engine displacement is one of the most important structure parameters, it is more than the cylinder diameter and number of cylinders can represent the size of the engine, the engine of many indexes are closely related with the displacement. The highest output power: power output generally with horses ( PS） Or kw ( 千瓦) To represent. Engine output power and the speed is very big, with the increase of rotational speed, the engine's power also increase, but at a certain speed, power, instead of a downward trend. Commonly used in automobile notes the highest output power and RPM to say ( r / min) , such as PS/r/min, which in turn every minute of the day when the highest output power. Maximum torque: the engine output from the crankshaft torque, torque of the said method is N. M/r/min, the maximum torque generally appear in the middle and low engine speed range, with the increase of rotational speed, torque will decline. Of course, how to weigh at the same time in the selection of reasonable use, waste not existing functionality. Beijing winter, for example, it is necessary to open air conditioning, want to consider when choosing engine power to the too small; Just loop commuter traffic vehicles in cities, there is no need to carry large horsepower engine. Try to be the economic and reasonable matching engine.