What does 1/minx1000 mean?
1 Answers
1/minx1000 means 1000 revolutions per minute. The following is an introduction about engine speed: Impact of transmission on speed: The number of gears and the transmission ratio of the gearbox affect the engine speed variation and power output. The more gears the transmission has, the greater the possibility for the engine to operate at maximum power. However, more gears make the transmission structure more complex, leading to significant difficulties in maintenance and disassembly. Therefore, 5-6 forward gears are generally used. If the transmission ratio is properly allocated, the engine can frequently operate within the range of maximum power, increasing the vehicle's reserve power and improving throttle acceleration and climbing ability. Improper allocation of the transmission ratio coefficient can lead to difficulties in gear shifting and affect the engine's power output. Impact of fuel on speed: The quality of engine combustion has a significant impact on power output, affecting the engine speed. When the speed of a gasoline engine increases, the flow rate of the mixture through the intake valve accelerates, and the speed of the piston moving upward during the compression stroke also increases. As a result, the vortex and turbulence in the cylinder intensify, accelerating the exchange between unburned and burned gases, which greatly improves the flame propagation speed. To ensure normal combustion, the ignition timing needs to be appropriately advanced as the speed increases. When the load decreases and the throttle opening decreases, the engine speed drops. At this time, the fresh charge entering the cylinder decreases, and the residual gas coefficient increases, lengthening the flame front gas. Consequently, the combustion speed decreases, the maximum combustion temperature and pressure drop, the combustion quality deteriorates, and post-combustion increases, leading to greater heat loss.
