An automatic transmission gear position control solenoid valve

Abstract

The invention discloses a gear control electromagnetic valve of an automatic transmission. The gear control electromagnetic valve comprises a valve body, a valve element and an electromagnet assembly, all of which are matched. The valve body is a plastic valve body. The valve element is assembled in the valve body. An opening P and an opening A are formed in the valve body in the radial direction. The opening P communicates with the opening A through an oil inlet in the center of the valve body and the valve element. A steel ball is arranged in the valve body. The steel ball is matched with the oil inlet to control connection and disconnection between the opening P and the opening A. The electromagnet assembly comprises a coil assembly, a fixed iron core, a movable iron core and a spring, wherein the fixed iron core and the movable iron core are arranged in the center of the coil assembly, and the spring is arranged between the fixed iron core and the movable iron core. An ejector rod is arranged in the center of the movable iron core and penetrates the valve element to be matched with the steel ball. The gear control electromagnetic valve has the beneficial effects that the structure is reasonable, the plastic valve body is adopted, machining is simple, and the production cost is low; and due to the fact that the steel ball can only move between the oil inlet of the valve body and the valve element, control over opening and closing of the electromagnetic valve can be achieved only through the extremely short stroke of the movable iron core of the electromagnetic valve, control is sensitive, and the response speed is high.

Description

technical field [0001] The invention relates to a component of an automatic transmission, in particular to an electromagnetic valve for controlling the gear position of an automatic transmission. Background technique [0002] The gearboxes used in automobiles are gradually replaced by automatic gearboxes, especially in mid-to-high-end cars, almost all automatic gearboxes are used. More and more modern vehicle engine electronic control systems tend to choose solenoid valves as actuators, because solenoid valves can directly control fuel injection volume and timing, and part of the fuel injection rate can also be realized by solenoid valves. In this way, the three control items can be completed with only one actuator, which greatly simplifies the hardware of the entire electronic and electronic system. Therefore, the solenoid valve is one of the most important components in the current automatic transmission. On the other hand, the on-off solenoid valve is relatively simple, ...

AI Technical Summary

Problems solved by technology

In addition, the valve bodies of the existing solenoid valves are mostly made of metal materials, which is cumbersome to process and high in production costs; in addition, when metal parts move relative to each other, they may sometimes be scratched due to friction. It will affect the overall performance and service life of the solenoid valve, so its structure needs to be further improved

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