Improved electronic throttle body

Abstract

The invention relates to an improved electronic throttle body, belonging to throttle assemblies of automobile engine air intake systems. A crankcase vent pipe, a carbon tank pipe and a pressurizing pipe are integrated on a throttle main body, so that an engine achieves the lowest emission, and the best dynamic property and the best fuel economy of a vehicle can be ensured. A main body is provided with a high and low idle speed limit mechanism which mainly comprises a throttle shaft, a sector gear, a reset torsional spring, a torsional spring and two limit stops on the main body. When a DC motor fails and can not operate normally, a throttle valve plate always stays in a high idle speed position state under the action of the two torsional springs, and the safety of the engine system is improved; the throttle valve plate is installed on the throttle shaft through self-locking screws, and the possibility of deforming the throttle shaft by the traditional reverse riveting screw is reduced. An O-ring is installed on an air inlet of the main body, so that the air tightness of connection between the main body and an air guide pipe of an air filter is improved.

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. technical background [0002] The research work on electronic throttle bodies originated in the 1970s, and products began to come out in the 1980s. In the past 10 years, research on electronic throttle bodies abroad has achieved very rapid development. The development trend can be summarized as follows: the control strategy is developed from linear control to nonlinear control, from auxiliary electronic throttle to independent electronic throttle system, from single control function to integrated multiple control functions, taking into account the improvement of power performance , economy, handling stability, emission and ride comfort. [0003] At present, many foreign companies have made in-depth research and development on the electronic throttle ...

AI Technical Summary

Problems solved by technology

The gasoline vapor in the activated carbon tank cannot be brought into the cylinder by the clean air to participate in combustion, which increases emissions and increases fuel consumption

Secondly, the existing electronic throttle body does not have a reasonable high and low idle limit mechanism, resulting in inaccurate high and low idle position control, and when the motor fails to work normally, the throttle valve cannot automatically return to the high idle position ;In addition, the joint between the air intake port of the electronic throttle body and the plastic air guide pipe of the air filter is prone to leakage; in the long-term use of the electronic throttle body, sometimes the throttle body is stuck due to the deformation of the throttle shaft due to the reverse riveting screw question etc.

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