Auxiliary pressurization system of internal combustion engine

Abstract

The invention relates to a pressurization system of an engine and aims to provide an auxiliary pressurization system of an internal combustion engine. The system comprises an actuating air cylinder, a pressurization air cylinder and an air storage tank; the actuating air cylinder is internally provided with an actuating air cylinder piston, and two air chambers are respectively connected to an air intake pipe and the atmosphere through control valves; a pressurization air cylinder is internally provided with a pressurization air cylinder piston, one side of the piston is fixedly connected with the actuating air cylinder piston, and an air chamber at the other side of the piston is respectively connected to the air storage tank and the air intake pipe through pipelines; the air storage tank is also connected with a blowdown pipe, and the blowdown pipe is connected to the air intake pipe of the engine; and the system also comprises an electronic control unit for controlling the starting state of each control valve, and the electronic control unit is electrically connected with an engine management system. According to the invention, the engine can be prevented from excessive pressurization, and the engine can be fully utilized to exhaust gas energy; the turbo lag effect can be eliminated, and the transient response characteristic of the engine is improved; and the system is suitable for a spark ignition engine and a compression ignition engine which are matched with an air intake pressurization system, and also can be applied to an engine without air intake pressurization.

Description

technical field [0001] The invention relates to an engine supercharging system, in particular to an internal combustion engine auxiliary supercharging system. Background technique [0002] Internal combustion engine supercharging technology was born at the end of the 19th century and was initially applied in the early 20th century, while diesel engine turbocharging began to be applied on a large scale in the middle of the 20th century. Generally speaking, the power of the internal combustion engine after supercharging can be increased by 40% to 60% or more than the original engine, the average effective pressure of the engine is increased, and the fuel economy is improved. [0003] In recent years, in order to cope with the dual pressure of energy crisis and environmental protection, increasing power density through supercharging and developing small-displacement engines have become the main technical approaches of major automobile companies. [0004] Internal combustion en...

AI Technical Summary

Problems solved by technology

The working principle of the turbocharger determines that it has the following disadvantages: 1. It is difficult to match the design. It is necessary to take into account both stable and transient conditions. The speed range of the gasoline engine is large, and there are problems of deflagration and heat load, which is more difficult; 2. 1. At low speed, due to insufficient exhaust energy of the engine, the degree of supercharging is low; 3. There is turbo lag, that is, it takes a certain time from the change of exhaust energy to the establishment of new intake pressure, which affects the acceleration response characteristics of the internal combustion engine

Existing technologies include adjustable turbine geometric section, adjustable slide valve, etc., but all have disadvantages such as strict process requirements, high cost, and difficult matching

Images