Engine intake system and engine intake adjustment method

Abstract

The invention discloses an engine air intake system. The engine air intake system comprises an electric supercharger, a bypass pipeline and a controller, wherein the electric supercharger is connected in parallel with the bypass pipeline; the controller is used for controlling the opening and closing of the electric supercharger and the bypass pipeline; when the rotating speed of the engine is beyond the first set rotating speed, the controller controls the electric supercharger to start and controls the bypass pipeline to close; when the rotating speed of the engine is beyond the second set rotating speed, the controller controls the electric supercharger to stop and controls the bypass pipeline to open; the first set rotating speed is less than the second setting rotating speed. The invention also discloses an engine air intake adjusting method. According to the engine air intake system, the electric supercharger and the bypass pipeline which are connected in parallel are added; when the engine runs at a low speed, the electric supercharger is started, and the bypass pipeline is closed, thus the air intake quantity of the engine can be increased, and as a result, the torque and power of the engine running at the low speed can be improved. In addition, the engine air intake system is simple in structure, and low in cost.

Description

technical field [0001] The invention relates to the field of engines, in particular to an engine intake system and an engine intake adjustment method. Background technique [0002] Engine intake boosting can effectively increase the power and torque of the engine, and the most widely used boosting technology is exhaust gas turbocharging. The principle of exhaust gas turbocharging is to use the exhaust gas to drive the turbocharger. The supercharger does not start at low speed, so the engine torque is insufficient at low speed, and the exhaust back pressure will be increased at the same time. The exhaust gas is passively changed, the flow rate is uncontrollable, and the cost is high. At present, the small-displacement naturally aspirated engine generally has the problem of insufficient low-speed torque. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide an engine air intake system and an eng...

AI Technical Summary

Problems solved by technology

The principle of exhaust gas turbocharging is to use the exhaust gas to drive the turbocharger. The supercharger does not start at low speed, so the engine torque is insufficient at low speed, and the exhaust back pressure will be increased at the same time. The exhaust gas is passively changed, the flow rate is uncontrollable, and the cost is high

At present, small displacement naturally aspirated engines generally have the problem of insufficient torque at low speeds

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