1 stroke (mm)
stroke (the Stroke) is what we usually refer to stroke.
refers to the distance between the stroke of the engine piston travels from the top dead center to the bottom dead center. This parameter has a crucial importance for engine performance orientation. Here we look at, what does that mean for stroke engines.
Stroke: a key element determining the engine speed characteristic of the
In certain engine displacement, the engine can be there are two design ideas: large bore a small stroke and small bore large stroke. A small stroke means the stroke of the piston is relatively small, which means more reps means that the piston easier time running back and forth in a unit that is easier to reach a relatively high speed. The large stroke means that the piston stroke is relatively large, which means that the piston has a longer acceleration distance, that is easier for a relatively high output torque. Also a small stroke engine block determines the height will be relatively small, and therefore a lower center of gravity; conversely, a large stroke of the engine determines the center of gravity will be higher. Both comparison, we can summarize their respective characteristics are as follows:
advantages
drawbacks [ 123]
a small stroke
easy to obtain high speed, low center of gravity
the low speed torque
a large stroke [ 123] easier to obtain low speed high torque output
high center of gravity, easy to achieve high speed
to illustrate the effect of the stroke of the engine, we find several part of the same displacement engine parameters for the 1.6-liter common family cars, from which we come to know the significance of stroke engine lies.
Golf 1.6
Peugeot 307 1.6
Corolla 1.6
[123 ] engine model
EA113
TU5JP4
1ZR-FE
displacement (l)
[ 123] 1.598 1.598
1.598
stroke (mm)
86.9 82
78.5
maximum torque speed (r / min)
3500 4000
5200
[123 ]
we can see from the above table, in the case of exactly three car engine displacement, the larger the stroke of the engine, the output torque of the maximum speed is also lower; contrary, the stroke small engine, the maximum output torque of the higher rotational speed. We can clearly see from this, the influence to the travel of the torque output characteristic of the engine.
In the final, we can see a real-life example of extreme piston travel: F1 racing engine. F1 cars are currently using 2.4 liters of displacement V8 engine, piston stroke less than 40 mm, and the maximum speed can reach 18,000 rpm widespread. By contrast, a displacement Accord 2.4, but the piston stroke of 99 mm, the maximum speed of only 6500 rpm. This makes possible a good illustration of the impact of the piston stroke of the engine characteristics.