Internal combustion engine constant pressure air supply device, internal combustion engine having the same, and control method

Abstract

The invention discloses a constant-pressure air feeding device and a constant-pressure air feeding control method for an internal combustion engine as well as the internal combustion engine with the device. The constant-pressure air feeding device comprises an air filter, a blower, a prime mover, the internal combustion engine, a pressure sensor, a controller, an air inlet bypass pipe and a one-way valve, wherein an air inlet of the air filter communicates with the atmosphere; an air inlet of the blower communicates with an air outlet of the air filter; the prime mover is in driving connection with the blower; an air inlet of the internal combustion engine is connected with an air outlet of the blower; the pressure sensor is used for detecting the pressure of the air inlet of the internal combustion engine; the controller is electrically connected with a control mechanism of the pressure sensor and the prime mover; two ends of the air inlet bypass pipe separately communicate with the air outlet of the air filter and the air inlet of the internal combustion engine; and the one-way valve is arranged on the air inlet bypass pipe. When the pressure of the air inlet of the internal combustion engine deviates from a target pressure value, pressure change detected by the pressure sensor is used as a feedback signal and is inputted into the controller, and the controller adjusts the rotating speed of the prime mover, so that the pressure of the air inlet of the internal combustion engine reaches a target value, and is kept constant; and when the altitude is low, the prime mover is controlled to stop, and air is supplied to the internal combustion engine through a bypass one-way valve.

Description

technical field [0001] The invention relates to the technical field of plateau applicability of internal combustion engines, in particular to a power recovery device for internal combustion engines used in high altitude areas and an internal combustion engine with the device; the invention also relates to a control method for constant pressure air supply of internal combustion engines. Background technique [0002] The altitude of the plateau area is higher, the higher the altitude, the lower the atmospheric pressure, the thinner the air, and the lower the oxygen content in the air. For example, on the plateau at an altitude of 5500 meters, the atmospheric pressure is about 50kPa and the density is about 0.7kg / m 3 , which are about 50% and 57% of the plain, respectively. Low atmospheric pressure and low oxygen content in the air often lead to a serious drop in output power due to insufficient air supply when the internal combustion engine operates at high altitudes. Accordi...

AI Technical Summary

Problems solved by technology

[0006] However, the technical solution provided by CN102155290A needs to arrange three superchargers, auxiliary combustion devices, adjustment mechanisms and connecting pipelines between them structurally, which not only needs to make greater changes to the original internal combustion engine structure , but it also greatly increases the difficulty of compact arrangement of components in a limited space

In addition, additional energy consumption is required during the working process of the auxiliary combustion device

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