Engine and pressure testing mechanism thereof

Abstract

The invention discloses an engine and a pressure testing mechanism thereof. A first pressure sensor and a second pressure sensor are arranged on a throttle valve body and a mounting structure correspondingly. Through the first pressure sensor, air inlet pressure in the throttle valve body is obtained; and through the second pressure sensor, the atmospheric pressure is obtained. Before the engine is started, the pressure in the throttle valve body is equal or similar to the atmospheric pressure, at this moment, the first pressure sensor and the second pressure sensor are used jointly, and pressure values of the two pressure sensors are compared. According to comparison results of the first pressure sensor and the second pressure sensor, operating conditions of the first pressure sensor areobtained in time. If the pressure value obtained through the first pressure sensor is equal to or similar to that obtained through the second pressure sensor, it is judged that the first pressure sensor operates normally; and followingly, the operating conditions of the engine are further accurately judged.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to an engine and a pressure measuring mechanism thereof. Background technique [0002] When the engine starts, the throttle body opens, and the gas enters the engine cylinder through the throttle body, and mixes with gasoline to form a combustible mixture; under the action of the igniter, it burns and works on the piston. In a traditional engine, a pressure sensor is usually installed at the throttle body to detect the intake air pressure at the throttle body, so as to judge the operating condition of the engine and the fuel injection quantity and other related controls. However, the traditional engine cannot detect the pressure sensor at the throttle body, and cannot obtain the operating condition of the pressure sensor itself. Therefore, once the pressure sensor fails, the operating condition of the pressure sensor cannot be obtained in time, which is easy Misjudgment and miscont...

AI Technical Summary

Problems solved by technology

However, the traditional engine cannot detect the pressure sensor at the throttle body, and cannot obtain the operating condition of the pressure sensor itself. Therefore, once the pressure sensor fails, the operating condition of the pressure sensor cannot be obtained in time, which is easy Misjudgment and miscontrol of engine operating conditions

Therefore, the traditional pressure measuring mechanism cannot meet the requirements of the second-generation on-board diagnostic system

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