Fast EGR valve capable of being controlled precisely

An EGR valve, precise control technology, applied in engine components, exhaust gas recirculation, machine/engine, etc., can solve the problems of complex stepper motor control technology, lag in exhaust gas flow adjustment response, slow response speed of valve stem movement, etc. Avoid contamination and corrosion, fast automatic reversal, and the effect of increasing the width

Pending Publication Date: 2018-11-06
ZIBO TAIZHAN MECHANICAL & ELECTRICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the EGR valve is mainly driven by a stepping motor to move the valve stem to realize the change of the valve opening degree. The control technology of the stepping motor is relatively complicated, resulting in high costs, and the movement response speed of the valve stem is slow, resulting in exhaust gas The flow adjustment response is relatively lagging

Method used

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  • Fast EGR valve capable of being controlled precisely
  • Fast EGR valve capable of being controlled precisely
  • Fast EGR valve capable of being controlled precisely

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Embodiment Construction

[0037] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0038] The present invention according to figure 1 The upper and lower positions corresponding to the placement state are defined as upper end (top) and lower end.

[0039] Such as figure 1 and figure 2 As shown, the present invention divides the housing of the whole valve into three parts: the motor casing 1, the end cover 34 and the valve seat 26. The end cover 34 is installed on the upper port of the motor casing 1, and the valve seat 26 is installed on the motor casing. 1 on the lower port. An air inlet 27 and an air outlet 25 are provided on the valve seat 26 . The stator 2 of the brushless motor and the rotor of the brushless motor are installed in the motor housing 1. The rotor adopts the structure that the magnetic ring 3 is placed outside the iron core 4. The trapezoidal internal thread 29 is processed in the iron core 4...

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PUM

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Abstract

The invention discloses a fast EGR valve capable of being controlled precisely and belongs to the technical field of supply of combustible mixtures of engines. The fast EGR valve comprises a shell which is provided with a gas inlet and a gas outlet. A motor is installed in the shell. A pushing rod is installed in a rotor of the motor. A piston is installed on the pushing rod. The piston controls opening and closing of the gas inlet and the gas outlet. The fast EGR valve is characterized in that the motor comprises a stator of a brushless motor and a rotor of the brushless motor, a power supplyelectric brush is fixed to the shell, each phase winding of the stator is connected with one power taking electric brush in a one-to-one manner, a reversing device is fixed to the rotor, a magnet isinstalled on the pushing rod, a Hall sensor is fixed in the shell, the Hall sensor inducts a magnetic field of the magnet and transmits signals to a circuit board to serve as control signals of starting and stopping of the motor. According to the valve, automatic physical connecting and reversing of the stator windings can be achieved fast and directly, the valve has the advantage of high power density of the brushless motor and has the advantage of achieving automatic reversing fast, the moving response speed of a valve rod can be increased, the position of the valve rod can be detected precisely, and then the purpose of precise control is achieved.

Description

technical field [0001] The invention belongs to the technical field of supplying combustible mixtures for engines, and in particular relates to a fast EGR valve that can be precisely controlled. Background technique [0002] In the engine exhaust gas recirculation system, the EGR valve controls the opening of the intake port through the internal DC motor to adjust the exhaust gas flow, so that the exhaust gas and fresh air are mixed in a certain proportion and then returned to the cylinder for recirculation to reduce combustion in the cylinder. The temperature and combustion speed can further reduce the emission of NOx, so as to achieve the purpose of ensuring the use and reducing pollution. It can be seen that the EGR valve has become one of the necessary components in the exhaust gas recirculation system. [0003] At present, the EGR valve is mainly driven by a stepping motor to move the valve stem to realize the change of the valve opening degree. The control technology ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M26/54
CPCF02M26/54
Inventor 刘之明
Owner ZIBO TAIZHAN MECHANICAL & ELECTRICAL
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