Engine air intake system and motorcycle thereof

Abstract

The invention discloses an engine air intake system and a motorcycle thereof. The air intake system comprises an air filter, wherein a main air intake passage which is communicated with an engine air intake manifold is formed in the air filter; the air intake system also comprises an air flow adjusting system; the air flow adjusting system comprises an adjusting valve component and a secondary air intake passage which is formed in the air filter and communicated with the main air intake passage; the adjusting valve component is arranged in the secondary air intake passage; the system is provided with two air intake passages, and the air volume intake is effectively controlled by a valve structure, so that the system can be more suitable for the running working condition of an engine; when a rotation speed reaches a set value, the adjusting valve component is completely opened under the action of a control system or manual action; when the rotation speed is less than the set value, the secondary air intake passage is closed to ensure the performance of the engine during high-speed running and improve the engine performance at a low or medium rotation speed; and thus, the optimal economic and technical norms of the engine are guaranteed.

Description

technical field [0001] The invention relates to a motorcycle component and a complete vehicle, in particular to a motorcycle engine intake system and the motorcycle. Background technique [0002] Motorcycles are widely used due to their lightness, flexibility, fast driving and strong road adaptability. [0003] Motorcycle engine is a relatively important equipment for motorcycles, and its running state directly affects the running state and economic indicators of the whole vehicle. When the engine is working, the air-fuel ratio is an important indicator, which determines whether the vehicle's driving conditions and emissions meet environmental protection requirements. The air intake volume is automatically adjusted according to the engine speed. Since the engine intake pipe is fixed, although the intake air volume will not increase proportionally with the increase of the engine speed, the air-fuel ratio cannot meet the combustion requirements, so it will The operating cond...

AI Technical Summary

Problems solved by technology

The air intake volume is automatically adjusted according to the engine speed. Since the engine intake pipe is fixed, although the intake air volume will not increase proportionally with the increase of the engine speed, the air-fuel ratio cannot meet the combustion requirements, so it will The running condition of the engine deteriorates, leading to insufficient combustion; and if the intake air volume is blindly paid attention to, the efficiency of the engine at low speed will be low, resulting in difficulty in starting the vehicle, substandard emissions and insufficient power

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