A device for optimizing engine torque based on intake pressure wave

Abstract

The invention relates to a device for optimizing the torque of an engine based on air inlet pressure waves. The device for optimizing the torque of the engine based on the air inlet pressure waves comprises an air filter (3), a straight round air inlet pipe (4), a fifth semi-elliptical air inlet pipe (5), a fourth semi-elliptical air inlet pipe (6), a third semi-elliptical air inlet pipe (7), a second semi-elliptical air inlet pipe (8), a first semi-elliptical air inlet pipe (9), a throttle position sensor (10), an air inlet sensor (11), a straight round air inlet pipe control valve (16), a fifth semi-elliptical air inlet pipe control valve (17), a fourth semi-elliptical air inlet pipe control valve (18), a third semi-elliptical air inlet pipe control valve (19), a second semi-elliptical air inlet pipe control valve (20) and a first semi-elliptical air inlet pipe control valve (21). According to the scheme, an air inlet system changes along with the change of the rotating speed of the motorcycle engine, the maximum pressure wave value changes along with the change of the rotating speed, and the maximum torque value changes along with the change of the rotating speed, so that the inflation coefficient of the motorcycle engine is fully increased, and the maximum pressure wave value is optimized.

Description

technical field [0001] The invention relates to an engine control technology, in particular to a device for optimizing the maximum torque of an engine based on an intake pressure wave. Background technique [0002] Since the motorcycle engine is a single-cylinder engine, its air intake system is relatively simple. There is only a single intake pipe, which removes impurities and dust in the air through the air filter, and enters the intake port under the control of the throttle position sensor. The fuel injection adopts port injection or direct injection in the engine cylinder; while the motorcycle engine speed changes in a wide range, and the motorcycle engine intake system has 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 a motorcycle depends on the charge coefficient, that...

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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