Engine and air inlet system thereof

Abstract

The invention discloses an engine and an air inlet system thereof. The air inlet system of the engine comprises an air inlet pipe, an air inlet manifold, an air inlet manifold header and an electric supercharger arranged on the air inlet pipe and located in front of the air inlet manifold header of the engine. The electric supercharger comprises a base, a motor arranged in the base, fan blades arranged in the base and a supercharging pipe communicated with the base through fluid. The base is provided with an air inlet, and the supercharging pipe is provided with an air outlet. The supercharging pipe is connected to the air inlet pipe in series and communicated with the air inlet pipe through fluid, and the motor can drive the fan blades to rotate, so that air flow flows in through the air inlet and flows out from the air outlet, and the air flow is mixed with air flowing in from the air inlet pipe to be sucked into an air cylinder of the engine together. By means of the engine and the air inlet system of the engine, emission can be effectively reduced, the efficiency of the engine is improved, the low-speed torque characteristics of the engine are improved, and engine surge is not caused.

Description

technical field [0001] The present invention relates to internal combustion engines, in particular to the field of internal combustion engine control based on oil-gas mixed combustion, including gasoline engine control, diesel engine control, natural gas and flexible fuel (mixture of methanol, ethanol, dimethyl ether and gasoline, etc.) Vehicle control and application of the above engines. Background technique [0002] The main purpose of internal combustion engine supercharging technology is to increase the intake air volume of the cylinder in a single combustion cycle by increasing the pressure of the internal combustion engine to inhale fresh air, thereby increasing the power and torque of the engine. The current mainstream supercharging methods include turbocharging (TurboBoost), mechanical supercharging, electric turbocharging, and hybrid supercharging system (turbo supercharging + mechanical supercharging or electric turbocharging). [0003] A turbocharger is an air c...

AI Technical Summary

Problems solved by technology

[0008] In the existing electric turbocharger, since the intake of the turbine is connected in series to the main intake pipeline of the engine, the blades and the motor are arranged in the intake pipe. When the compressed air capacity cannot keep up with the intake demand or when the motor stops working, the impeller and the motor will hinder the flow of air in the pipeline, resulting in poor air flow, affecting the intake efficiency and the maximum torque of the engine

[0009] Moreover, the boosted intake air volume of the existing electric turbocharger is limited. This is because the existing electric turbocharger supercharges the air in the main intake pipe. Depends on the maximum intake capacity of the main pipe

[0010] In addition, due to the layout of the air outlet of the existing electric turbocharger, the air flow after the boost is uneven, and turbulent flow is easily formed, resulting in fluctuations in the intake air of the engine and engine surge

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