Hall type linear electric EGR (Exhaust Gas Recirculation) valve
An EGR valve, Hall-type technology, applied in engine components, combustion engines, machines/engines, etc., can solve the problems of inability to correctly judge the valve opening, high price, and large size of the electric EGR valve, reducing accuracy and sensitivity. High, long life effect
Inactive Publication Date: 2013-09-25
WUXI LONGSHENG TECH
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Problems solved by technology
However, the existing electric EGR valve cannot correctly judge the opening of the valve and the stability of the valve center rod during the action.
In the actual operation process, the valve opening can be controlled by controlling the voltage applied to both ends of the coil assembly. Therefore, a device for controlling voltage changes needs to be installed outside the valve, which causes the electric EGR valve to be bulky and expensive. Not enough
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[0014] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0015] A Hall type linear electric EGR valve, its structure is as follows figure 1 As shown, it includes the valve seat assembly 1, the center rod 3 is installed in the valve seat assembly 1 through the valve seat bushing 2, the upper end of the valve seat assembly 1 is connected with the shell 16, and the coil assembly 13 is arranged in the shell, and the coil The inner cavity of the assembly 13 is provided with a uniform iron 9 through the uniform iron guide sleeve 11, and the upper and lower ends of the uniform iron 9 are respectively provided with an upper magnetic plate 10 and a lower magnetic plate 6, and a gland 14 is arranged on the top of the shell, and the gland 14 will put the upper The magnetic plate 10 and the coil assembly 13 are compressed; the top of the central rod is close to the bottom end of the uniform iron, that ...
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The invention discloses a Hall type linear electric EGR (Exhaust Gas Recirculation) valve comprising an outer shell and a gland assembled at the upper end of the outer shell, wherein the outer shell is internally provided with a coil assembly, a uniform iron and a centre rod, the uniform iron and the centre rod are coaxially arranged at the center of the coil assembly, the top end of the centre rod is in butt joint with the bottom end of the uniform iron, and a Hall type control mechanism for controlling voltages at two ends of the coil assembly is arranged above the outer shell; the control mechanism comprises a shell fixedly connected to the top end of the outer shell, a sliding rod assembly is assembled in the shell, magnetic steel is embedded in the sliding rod assembly, and the bottom end of the sliding rod assembly is in butt joint with the top end of the uniform iron; and the top end of the shell is provided with a Hall chip, and the voltage output end of the Hall chip is respectively connected with two ends of the coil assembly. The Hall type control mechanism of the Hall type linear electric EGR valve is a non-contact type sensor, linear voltage is output through the change of a magnetic field, the sensitivity is high, the precision of relevant parts is lowered, and the service life is prolonged; meanwhile, the cost of the linear electric valve is reduced.
Description
technical field [0001] The invention relates to an engine tail gas emission recirculation system, in particular to an electric EGR valve. Background technique [0002] In the engine exhaust gas recirculation system (EGR system), the EGR valve is mainly used to adjust and control the flow of recirculated exhaust gas. The electric EGR valve controls the opening of the intake port through the internal DC motor, thereby adjusting the flow of exhaust gas, so that the exhaust gas and fresh The air is mixed in a certain proportion and returned to the cylinder for recirculation to reduce the combustion temperature and combustion speed in the cylinder, further reducing NO X emissions. Compared with the pneumatic EGR valve, the electric EGR valve has the characteristics of fast response and more stable operation, and the electric EGR valve can also solve the problem that some vehicles do not have a vacuum source, so it is widely used. [0003] The electric EGR valve usually includes...
Claims
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Patent Timeline
Login to View More IPC IPC(8): F02M25/07F02M26/45F02M26/53F02M26/66
CPCY02T10/12
Inventor 沈家湖
Owner WUXI LONGSHENG TECH