Phase control valve with hydraulic recovery structure

Abstract

The invention provides a phase control valve with a hydraulic recovery structure. A recovery spring (3-5) is arranged between a first valve plate (3-3) and a second valve plate (3-4), and the first valve plate (3-3) and the second valve plate sleeve a reversing rod (3) and can axially move relative to the reversing rod (3); a first recovery oil channel (3-11) is arranged in a first valve block (3-1), a second recovery oil channel (3-21) is arranged in a second valve block (3-2), the first recovery oil channel (3-11) and a second recovery oil channel (3-21) communicate with an inner cavity of a valve sleeve (2), engine oil to be discharged originally is recovered and used in a control valve, engine oil consumption is reduced, the valve phase adjusting speed of the engine under the low-rotating-speed working condition can be effectively increased.

Description

technical field [0001] The invention relates to the technical field of internal combustion engine variable valve timing adjustment technology, in particular to a phase control valve with a hydraulic recovery structure. Background technique [0002] Variable valve timing adjustment technology refers to changing the overlapping angle of the intake and exhaust valves by controlling the opening angle of the intake and exhaust valves of the internal combustion engine under specific engine conditions, thereby increasing the intake charge and Efficiency, to better organize the intake vortex, adjust the cylinder explosion pressure and residual exhaust gas volume, and finally obtain comprehensive performance improvements such as engine power, torque, emissions, and fuel economy. [0003] The general oil control valve inputs the oil pressure through the oil pump, switches it to the advance angle or delay angle oil chamber of the phaser for adjustment, and the oil in the chamber on the...

AI Technical Summary

Problems solved by technology

[0003] The general oil control valve inputs the oil pressure through the oil pump, switches it to the advance angle or delay angle oil chamber of the phaser for adjustment, and the oil in the chamber on the other side is discharged to the engine oil pan through the oil control valve. This process It will consume more engine oil and put a greater burden on the oil pump

When the engine speed is low, the corresponding pump oil pressure is also low, and the flow rate is also small. The speed of valve phase adjustment will be affected, resulting in slow response, which will affect the switching efficiency and switching timeliness.

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