Exhaust structure capable of reducing exhaust disturbance between air cylinders of engine

Abstract

The invention discloses an exhaust structure capable of reducing exhaust disturbance between air cylinders of an engine. The exhaust structure comprises an exhaust branch pipe communicated with each air cylinder, every two exhaust branch pipes are intersected to form an intersection pipe, each intersection pipe is communicated with a catalysis device, and exhaust openings of all the catalysis devices are intersected to form a main exhaust opening. According to the exhaust structure capable of reducing the exhaust disturbance between the air cylinders of the engine, the exhaust disturbance can be reduced, exhaust is more thorough, the residual amount of waste gas in the air cylinders is reduced, the air inlet amount is improved, meanwhile, the temperature of mixed gas in the air cylinders is reduced, and detonation is reduced; meanwhile, exhausts of the two sets of air cylinders are provided with the independent catalysis devices, the oil break and cylinder stop function of the two sets of air cylinders of the engine can be achieved, and the oil consumption rate is reduced.

Description

technical field [0001] The invention relates to the field of engines, in particular to an exhaust structure for reducing exhaust interference between cylinders of the engine. Background technique [0002] With the gradual implementation of the country's fourth-stage fuel consumption regulations, the main problem facing engines is how to reduce fuel consumption to meet increasingly stringent regulatory requirements. [0003] At present, there are many technical means for reducing fuel consumption of gasoline engines, such as: reducing mechanical friction, reducing pumping loss, thermal management, improving combustion efficiency, supercharging miniaturization, etc. Among them, the Atkinson cycle technology is used to reduce pumping loss and improve combustion efficiency. The measures are widely used in hybrid vehicles. Due to the small intake air volume of the Atkinson cycle and the need for a large geometric compression ratio, the external characteristics and performance can...

AI Technical Summary

Problems solved by technology

Existing 4-2-1 exhaust manifolds with other exhaust interference reduction technologies reduce interference by greatly increasing the length of the exhaust branch pipes. The structure of the exhaust manifold has no essential change. The exhaust manifold will inevitably lead to a slower rise in the temperature of the catalyst

It is necessary to delay the ignition time and increase the idling speed during the idling stage of the cold car to ensure that the catalytic converter can quickly reach the optimum operating temperature and reduce emissions. Stable, and for higher emission standards in the future, this technology will face greater challenges

Moreover, the exhaust manifold of this structure is bulky and difficult to arrange

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