A grouped exhaust manifold and engine

Abstract

The invention relates to the technical field of engine exhaust systems, and discloses a grouping type exhaust manifold. The grouping type exhaust manifold comprises a first exhaust branch pipe, a second exhaust branch pipe, a third exhaust branch pipe and a fourth exhaust branch pipe. A first-fourth cylinder branch pipe is formed through intersection of the first exhaust branch pipe and the fourth exhaust branch pipe, a second-third cylinder branch pipe is formed through intersection of the second exhaust branch pipe and the third exhaust branch pipe. The first-fourth cylinder branch pipe and the second-third cylinder branch pipe intersect at the inlet position of an exhaust pipe, and an oxygen sensor is arranged at the intersection position. A partition plate is arranged in the exhaust pipe and extends towards the interior of the exhaust pipe from an inlet of the exhaust pipe in the exhaust pipe extending direction. A first catalytic converter is arranged on one side of the partition plate, a second catalytic converter is arranged on the other side opposite to one side of the partition plate, and the length, in the extending direction, of the partition plate is not smaller than the length of the first catalytic converter or the second catalytic converter. According to the grouping type exhaust manifold, the dynamic property and the emission performance can be improved, arrangement is convenient, and cost is low. The invention further discloses an engine with the above grouping type exhaust manifold.

Description

technical field [0001] The invention relates to the technical field of engine exhaust systems, in particular to a grouped exhaust manifold and an engine. Background technique [0002] With the gradual implementation of the country's fourth-stage fuel consumption regulations, the main problem that gasoline engines are currently facing 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, such as Toyota Prius, etc., because the Atkinson cycle requires a large geometric compression ratio, the external characteristics and performance cannot...

AI Technical Summary

Problems solved by technology

However, due to the special exhaust manifold design, the exhaust branch pipe is very long, large in size, and very complicated in shape; the catalytic converter 5' is arranged behind, slow to light up, and difficult to control HC emissions

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