Engine and electric turbocharging system thereof

Abstract

The invention discloses an electric turbocharging system, comprising a position sensor, a controller, a driving power source and an electric turbocharging device which are successively connected. The position sensor detects opening of a throttle valve and generates a detection value; the controller receives the detection value and outputs a corresponding control command according to the detection value; the driving power source receives the control command of the controller, and outputs corresponding control current according to the control command; and the electric turbocharging device is connected with the driving power source, namely the control current outputted by the driving power source can control strength of eddy of the electric turbocharging device. Accordingly, by the aid of the electric turbocharging system, corresponding relation between the opening of the mechanical throttle valve and the strength of the eddy of the electric turbocharging device can be realized, and the turbocharging system automatically adjusts air supply quantity according to needs of actual working conditions. The invention further discloses an engine comprising the electric turbocharging system.

Description

technical field [0001] The invention relates to the technical field of engine air intake control, in particular to an engine and its electric turbocharging system. Background technique [0002] When the engine is working, the fuel must be in an appropriate ratio with the inhaled air to form a combustible mixture, that is, the ratio of fuel to air in the mixture is the air-fuel ratio. Theoretically, the minimum number of grams of air required for complete combustion of each gram of fuel is called the theoretical air-fuel ratio. [0003] However, since the naturally aspirated engine is constrained by many factors, it is basically impossible to achieve the theoretical air-fuel ratio of 14.5. It has been verified that under the state of natural intake of the engine, the general air intake can only reach 65% to 90% of the design requirement, so the engine can only send out 65% to 90% of the original design power. [0004] Therefore, in order to improve the air intake capacity o...

AI Technical Summary

Problems solved by technology

However, the electric turbocharger is driven by a motor, and the speed of the motor is fixed. It cannot be changed according to the amount of air needed by the cylinder. In this way, there will be insufficient or high pressure.

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