Method for optimizing engine torque based on intake pressure waves

Abstract

The invention relates to a method for optimizing the engine torque based on intake pressure waves. An air filter (3), an intake straight circular pipe (4), a fifth intake semi-elliptic pipe (5), a fourth intake semi-elliptic pipe (6), a third intake semi-elliptic pipe (7), a second intake semi-elliptic pipe (8), a first intake semi-elliptic pipe (9), a throttle position sensor (10), an intake channel sensor (11), an intake straight circular pipe control valve (16), a fifth intake semi-elliptic pipe control valve (17), a fourth intake semi-elliptic pipe control valve (18), a third intake semi-elliptic pipe control valve (19), a second intake semi-elliptic pipe control valve (20) and a first intake semi-elliptic pipe control valve (21) are included. In the scheme, an intake system changes along with the change of the rotating speed of a motorcycle engine, the pressure waves change along with the change of the rotating speed, the maximum torque value changes along with the change of the rotating speed, and therefore the inflation coefficient of the motorcycle engine is sufficiently improved, and the maximum value of the pressure waves is optimized.

Description

technical field [0001] The invention relates to an engine control technology, in particular to a method for optimizing the maximum torque of an engine based on intake pressure waves. Background technique [0002] Because the motorcycle engine is a single-cylinder engine, its air intake system is relatively simple. There is only a single air intake pipe, which passes through the air filter to remove impurities and dust in the air, and enters the air intake under the control of the throttle position sensor. The fuel injection adopts the intake port injection or the direct injection in the engine cylinder; while the motorcycle engine speed varies widely, and the motorcycle engine intake system is a single intake pipe; when optimizing the motorcycle engine intake system, generally It is difficult to take into account low-speed working conditions, medium-speed working conditions, high-speed working conditions, etc.; because the torque curve of the motorcycle depends on the charge...

AI Technical Summary

Problems solved by technology

[0003] In order to achieve the maximum torque at low speed, the maximum pressure wave of the motorcycle engine intake system is in the low speed area, and enters the motorcycle engine cylinder for combustion when the throttle position sensor is turned on. At this time, the air and fuel are mixed evenly, and the combustion is fast. , less pollutants are emitted, the engine starts to respond quickly, meets the needs of low-speed high-torque, and meets user experience such as fast acceleration at low speeds; when the engine speed increases, more air intake is required and the speed is required to be faster. At this time, the engine The intake pipe system should be slightly shorter, so that the air enters the motorcycle engine cylinder at a higher speed, the combustion rate is accelerated, and the thermal conversion efficiency is accelerated, that is, the maximum value of the pressure wave moves to the area where the speed increases, and the maximum torque value also moves to the area where the speed increases. High area movement; meet the acceleration performance requirements of motorcycle drivers and passengers; and when the motorcycle engine speed is too high, the intake air volume must be increased, the motorcycle engine intake pipe must be short, and the gas flow resistance is small, so the motorcycle The engine pipeline is straight, which reduces flow resistance and gas flow loss, accelerates the flow of gas, accelerates the mixing speed of air and fuel vapor, increases the inflation coefficient of the motorcycle engine, improves the inflation efficiency of the motorcycle engine, and thus increases the maximum value of the intake pressure wave The speed range moves, and the maximum torque value also moves to the high speed range; therefore, for motorcycle engines with variable working conditions, the required maximum torque value is different at different speeds, while the traditional Its single air intake system is difficult to satisfy

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