Electronic air throttle body for non-contact sensor

Abstract

The invention relates to an electronic air throttle body for a non-contact sensor, which belongs to air throttle assemblies of automobile engine air inlet systems. The air throttle body is provided with a direct current motor, a motor gear is meshed with a middle gear, and the middle gear is meshed with a sector gear arranged on an air throttle shaft; a rotating position of the sector gear on the body is provided with two protuberant limit stops; one end of a torsion spring is fixed on the body, while the other end is fixed on the sector gear; one end of another torsion spring positioned between the sector gear and a gear blocking cover is fixed on the sector gear, while the other end is fixed on the gear blocking cover; the gear blocking cover is clamped on a hook of the sector gear; and when the air throttle shaft rotates positively to a full open position, a sector gear stop dog resists against one limit dog of the body; and when the air throttle shaft rotates reversely to a low idle speed position, the sector gear stop dog resists against the other limit dog of the body. When the direct current motor has failure and cannot work normally, valves of the air throttle are always in a high idle speed state under the actions of the two torsion springs so as to increase the safety of an engine system.

Description

technical field [0001] The invention relates to components of an air intake system of an automobile engine, in particular to the technical field of a throttle body assembly used for an air intake system of an automobile engine. Background technique [0002] The role of the throttle body assembly in the automotive engine system is to control the intake flow of the engine and determine the operating conditions of the engine. The driver manipulates the throttle opening by operating the accelerator pedal. The traditional throttle body assembly adopts a mechanical connection method, and the accelerator pedal and the throttle body assembly are connected through a pull rod or a cable transmission. Therefore, the opening of the throttle valve depends entirely on the position of the accelerator pedal, that is, the driver's operation intention, but from the power From the point of view of safety and economy, the engine is not always in the best operating condition, and the driver's m...

AI Technical Summary

Problems solved by technology

The H-bridge circuit structure is often used to drive the stepper motor. The control unit controls the stepper motor through the number of pulses, frequency and direction control level. The advantages are high precision, low energy consumption, and good position retention characteristics. The disadvantage is that the high-speed performance is poor, and it cannot meet the requirements of the throttle valve under high dynamic response performance.

Images