Self-adapting pulse turbocharging system

Abstract

The invention relates to a self-adapting pulse turbocharging system, which belongs to the technical field of combustion engine. The self-adapting pulse turbocharging system comprises cylinders, an exhaust branch pipe, exhaust pipes, a spray pipe and a turbine, wherein the spray pipe is arranged between the tail of a second exhaust pipe and a first exhaust pipe. Under the condition of low load, the action of the spray pipe is favorable for exhaust of three cylinders close to the turbine, so as to reduce the pumping loss and the oil consumption; and under the condition of high load, exhaust gas of three cylinders far away from the turbine can simultaneously pass through two exhaust pipes, so as to relatively increase the capacity occupied by the exhaust gas and form a quasi-steady pressure system, thereby reducing the oil consumption. The self-adapting pulse turbocharging system has a reasonable design and a simple structure, is not limited by the number of the cylinders, and is suitable for a pulse turbocharging system, wherein the number of inlets of the turbine is more than two and the turbine is laterally arranged.

Description

technical field [0001] The invention relates to a turbocharging system of an internal combustion engine, in particular to an adaptive pulse turbocharging device suitable for more than two turbine inlets and the turbine is placed sideways, and belongs to the technical field of internal combustion engines. Background technique [0002] With the development of society and the improvement of environmental protection requirements, engine boosting technology is now more and more widely used. Most of the medium and high-power engines use turbocharging technology to increase power and reduce fuel consumption. The two basic supercharging systems for turbocharged engines are constant pressure supercharging system and pulse supercharging system. The structural feature of the constant pressure booster system is that the volume of the exhaust pipe is large, the exhaust pipe plays a role in stabilizing the pressure, the fluctuation of the exhaust pressure is small, the flow through the tu...

AI Technical Summary

Problems solved by technology

The volume of the exhaust pipe of the pulse supercharging system is small, the entropy increase of the exhaust gas from the exhaust valve to the turbine inlet is small, the exhaust energy utilization rate is high, and the load change can be reflected in time, and the response speed is fast; However, because the turbine is a pulsating intake, the efficiency of the turbine is low, so the pulse supercharging system is beneficial for low load and transient load

It can be seen that if an engine is equipped with constant pressure supercharging method and pulse supercharging method at the same time, it is ideal to use constant pressure supercharging system at high load and pulse supercharging system at low load and transient load. , but the volume of the exhaust pipe of the existing engine supercharging system cannot be adjusted

The patent number is ZL200410050996.3, and the name of the invention is an invention of a variable modular pulse conversion supercharging system for a turbocharged diesel engine. In its second embodiment, when the load is low, the exhaust interference of each cylinder is very large , resulting in increased pumping loss; the quasi-constant pressure booster system described in the present invention cannot be formed at high loads, resulting in low turbine efficiency; and the use of two-position control valve control causes the engine structure to become more complicated

The patent application number is 200710007494.6, the publication number is CN 101008336A, and the title of the invention is an invention of a variable exhaust pipe volume modular pulse conversion supercharging system for a turbocharged diesel engine. When the load is low, the exhaust interference of each cylinder is very large. Large, resulting in increased pumping loss; the quasi-constant pressure booster system described in the present invention cannot be formed at high loads, resulting in low turbine efficiency; and the use of two-position control valve control makes the engine structure more complicated

Most of the existing supercharged engines for vehicles use a supercharging device with a turbo side, and the volume of the exhaust pipe cannot be adjusted.

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