Engine intake and exhaust device and control system

Abstract

The invention discloses an intake and exhaust device for an engine and a control system. The intake and exhaust device comprises an intake component and an exhaust component, wherein the intake component comprises an intake bypass pipeline and an intake bypass valve arranged on the intake bypass pipeline; one end of the intake bypass pipeline communicates with a front air pipeline of a booster ofthe engine; the other end of the intake bypass pipeline communicates with a rear air pipeline of the booster; the exhaust component comprises an exhaust bypass pipeline and an exhaust bypass valve arranged on the exhaust bypass pipeline; one end of the exhaust bypass pipeline communicates with a front exhaust pipeline of the booster; and the other end of the exhaust bypass pipeline communicates with the rear exhaust pipeline of the booster. According to the intake and exhaust device for the engine and the control system, the intake bypass valve and the exhaust bypass valve are opened in time to avoid unnecessary pumping loss, so that the running economical efficiency of the engine is improved; and meanwhile, the booster is prevented from surging during exhaust, and further, the adaptability to plateaus, high temperatures and high and cold environments can be further embodied well.

Description

technical field [0001] The invention relates to the technical field of engine intake and exhaust, in particular to an engine intake and exhaust device and a control system. Background technique [0002] The intake and exhaust principle of the engine is generally that the air enters the supercharger from the air pipeline before supercharging (abbreviation, front air pipeline) and then passes through the supercharged air pipeline (abbreviation, rear air pipeline) Enter the intake pipe of the engine, and the intake pipe is generally provided with a throttle valve; the exhaust gas generated by the engine enters the supercharger through the front exhaust pipe of the supercharger, and is discharged from the rear exhaust pipe of the supercharger. [0003] For the engine, the control of the intake air volume and intake pressure of the engine is very important. When the intake air pressure exceeds the boost pressure required by the engine, it will cause over-torque of the engine and ...

AI Technical Summary

Problems solved by technology

However, when adjusting the opening of the throttle valve, when the opening of the throttle valve becomes smaller or is not kept fully open, it will inevitably lead to a certain degree of pumping loss, thereby reducing the economy of engine operation, and the supercharger will prone to shock

[0005] To sum up, how to solve the problems that the economical efficiency of the engine operation and the supercharger prone to surge when the intake pressure of the engine is adjusted has become a technical problem that those skilled in the art need to solve urgently.

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