Engine air inlet temperature control method and structure

Abstract

The invention discloses an engine air inlet temperature control method, belongs to the technical field of engines, and solves the problem that a traditional intercooler is difficult to control the air temperature after intercooling. The method comprises the following steps: taking gas from an air inlet tube after intercooling into a thermostat; when the gas entering the thermostat is low-temperature gas, closing the cooling water channel by the the thermostat, so that cooling water cannot enter the intercooler, and the intercooler loses the cooling effect on the gas; when the gas entering the thermostat is high-temperature gas, opening the cooling water channel by the thermostat, so that cooling water enters the intercooler, and the intercooler accelerates cooling of the gas, and thus, the temperature of the gas after intercooling tends to be stable, and condensed water is prevented from being generated after intercooling. The invention further discloses an engine air inlet temperature control structure, which can achieve accurate control over the cooling water flow, and is convenient to mount and use.

Description

technical field [0001] The invention relates to the technical field of engines, more specifically, it relates to a method and structure for controlling the intake air temperature of an engine. Background technique [0002] In the process of engine use, in order to increase the power density of the engine, it is necessary to increase the intake air volume, for this reason, high-pressure intercooled engines are more and more widely used. The heat dissipation area of ​​the intercooler of the intercooler engine is fixed, and the theoretical cooling capacity is also basically fixed. The airflow temperature after intercooling is mainly affected by the cooling water flow, temperature, intake air temperature, and intake air flow. The temperature of the pressurized air can reach 200-300°C before intercooling. After intercooling, the temperature is lower than the ambient dew point temperature, and condensed water will start to precipitate. The higher the air humidity and the lower th...

AI Technical Summary

Problems solved by technology

If the temperature after intercooling is too low, too much condensed water will accumulate, and if it is light, it will enter the combustion chamber and the crankcase oil pan, resulting in the thinning of the engine oil, the decrease of lubricating ability, early wear of the moving pair, rust and corrosion, etc., serious problems It may even completely fill the combustion chamber during the compression stroke, resulting in direct damage to the piston and connecting rod

If the temperature is too high after the intercooler, it will cause the intake air to expand, resulting in a decrease in the actual intake air mass flow rate

At present, the temperature control of the intercooler gas is usually adjusted according to the cooling water temperature after the intercooler to adjust the cooling water flow. The temperature control process is unstable and cannot meet the needs of different working environments. Therefore, it is urgent to develop and design a New Engine Intake Temperature Control Method and Structure

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