A Low Pulsation Torque Internal Combustion Engine Based on Sine Wave Suppression and Offset

Abstract

The invention discloses a low pulsation torque internal combustion engine based on sine wave suppression cancellation. As internal combustion engines develop towards the high speed and high power direction, the vibration noise problem of the internal combustion engines becomes increasingly serious. The low pulsation torque internal combustion engine includes a first internal combustion engine unitand a second internal combustion engine unit. The first internal combustion engine unit includes a first cylinder body set, a first connecting rod set and a first crankshaft segment. The second internal combustion engine unit includes a second cylinder body set, a second connecting rod set and a second crankshaft segment. The first crankshaft segment is coaxially disposed with the second crankshaft segment, and the opposite ends of the first crankshaft segment and the second crankshaft segment are fixedly connected. The first crankshaft segment and the second crankshaft segment are staggeredby an angle theta in the circumferential directions of own axes, and theta= (b.alpha) / n. Alpha is equal to 180 degrees; b is the deflection coefficient, and in the case that the internal combustion engine units are two-stroke internal combustion engines, b is equal to 1; and in the case that the internal combustion engine units are four-stroke internal combustion engines, b is equal to 2. According to the low pulsation torque internal combustion engine based on the sine wave suppression cancellation, the main pulsation torque of the internal combustion engine can be significantly suppressed, so that the main frequency pulsation torque component in the output torque of the internal combustion engine is significantly reduced.

Description

technical field [0001] The invention belongs to the technical field of shock absorption of internal combustion engines, and in particular relates to a low-pulsation torque internal combustion engine based on sine wave suppression and cancellation. Background technique [0002] The internal combustion engine is a thermal power machine with a wide range of uses. It is widely used as the main driving force in the fields of ships, tractors, generator systems, construction machinery and locomotives. With the development of internal combustion engines in the direction of high speed, light weight and high power, the problem of vibration and noise is becoming more and more serious; while people's requirements for vibration and noise control are becoming more and more stringent. This contradiction prompts people to pay more attention to the research of internal combustion engine vibration problems. [0003] The internal combustion engine adopting the crank connecting rod mechanism ...

AI Technical Summary

Problems solved by technology

For the suppression of shafting torsional vibration, multi-cylinder technology is generally used to reduce the proportional amplitude of shafting torsional vibration torque caused by changes in cylinder pulsating pressure. It is effective to reduce the proportional amplitude of the torsional vibration torque of the shaft system, but because it is only a simple superposition of the pulsating torque waveforms of each cylinder, the frequency pulsating torque corresponding to the number of cylinders is still relatively obvious.

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