Large-flow continuous variable valve timing (CVVT) fuel control valve with filter screen

Abstract

The invention discloses a large-flow continuous variable valve timing (CVVT) fuel control valve with a filter screen. The large-flow CVVT fuel control valve with the filter screen comprises a valve bush component, a rear yoke iron component, a front yoke iron component, an iron core component, a winding component and an outer yoke sleeve component, wherein the valve bush component consists of a valve bush (1), a return spring (2), a valve core (3) and a ring; the valve bush (1) is provided with a fuel feed port (12), an entrance angle oil port (17) and a lag angle oil angle (19); and the fuelfeed port (12), the entrance angle oil port (17) and the lag angle oil angle (19) are pressed into the filter screen (18) respectively. The large-flow CVVT fuel control valve with the filter screen controls the fuel flow to increase by 50 percent, improves the quick response time of a valve timing actuator, increases a filtering function of the filter screen, effectively protects foreign matters from entering the fuel control valve, guarantees that the valve core can slide in the valve bush freely, reduces the possibility of the clamping stagnation of the valve core, increases the working reliability of a valve timing system, reduces the requirements of a motor on the using environment and prolongs the service life of a product.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to a continuously variable valve timing fuel control valve with a large flow rate and a filter screen. Background technique [0002] Many burrs will be left in the processing of the engine and its pipeline, and any tiny burr may have a great impact on the life and overall performance of the engine; a large number of burrs can be removed by EDM, electrolysis, abrasive flow and other processing methods , but under the pressure of equipment input cost and manufacturing cost, not all engine manufacturers can adopt mechanical equipment deburring method. The method of manual deburring can not guarantee the complete removal of burrs and the cleanliness of the internal pipeline of the engine. [0003] At the same time, the fuel control valve is a high-precision control valve that requires high internal cleanliness. Foreign matter must be controlled at a size of 0.3 mm and a weight of l...

AI Technical Summary

Problems solved by technology

[0002] Many burrs will be left in the processing of the engine and its pipeline, and any tiny burr may have a great impact on the life and overall performance of the engine; a large number of burrs can be removed by EDM, electrolysis, abrasive flow and other processing methods , but under the pressure of equipment input cost and manufacturing cost, not all engine manufacturers can adopt mechanical equipment deburring method. The method of manual deburring can not guarantee the complete removal of burrs and the cleanliness of the internal pipeline of the engine.

[0003] At the same time, the fuel control valve is a high-precision control valve that requires high internal cleanliness. Foreign matter must be controlled at a size of 0.3 mm and a weight of less than 2 mg. It is very important. In principle, it is necessary to operate in accordance with the cleanliness of microns and in a constant temperature and pressure environment. At the same time, it is necessary to ensure the cleanliness of each component and equipment. However, in reality, many engine factories operate in an open environment. , it is difficult to ensure the cleanliness of the engine

[0004] In the actual use of the engine, carbon deposits still exist. Carbon deposits will pollute the lubricating oil of the engine and produce colloidal impurities; debris generated by the wear and tear between matching parts will also pollute the lubricating oil

[0005] At present, the fuel control valve used in CVVT (Continue Variable Valve Timing)-continuously variable valve timing mechanism has the following problems: ①The accuracy of the fuel control valve is poor, and there is no filtering effect, foreign matter can enter the interior of the fuel control valve , the valve core is often stuck; ②The flow rate of the control oil is too small to be suitable for some occasions with large displacement or high requirements; ③The fast response time of the valve timing actuator is slow

Images