Dual-VVT (Variable Valve Timing) engine oil gallery with hydraulic tappet oil passage

Abstract

The invention discloses a dual-TTV (Variable Valve Timing) engine oil gallery with a hydraulic tappet oil passage, comprising a main oil passage. The dual-TTV engine oil gallery is characterized in that: an engine oil control valve oil passage and a hydraulic tappet oil passage are connected to the main oil passage in parallel; an air inlet engine oil control valve installing cylinder and an air outlet engine oil control valve installing cylinder are connected to the engine oil control valve oil passage in parallel; a liquid inlet hydraulic tappet oil passage and a liquid outlet hydraulic tappet oil passage are connected to the hydraulic tappet oil passage in parallel; and the air inlet hydraulic tappet oil passage and the air outlet hydraulic tappet oil passage and the air outlet hydraulic tappet oil passage are respectively provided with four air inlet camshaft oil passages and four air outlet camshaft oil passages in a parallel connection way. According to the dual-VVT engine oil gallery disclosed by the invention, because when the oil passages are connected in parallel, a pressure-limiting oil plug is arranged in the right end part of the hydraulic tappet oil passage so as to limit pressure of the hydraulic tappet oil passage, pressure of the engine oil control valve oil passage is increased, and normal working of a VVT system is ensured; the oil gallery of the VVT system is shortened and simplified, and normal lubricating and working of various components of an engine are ensured; meanwhile, performance of the engine can be improved and oil consumption is reduced.

Description

technical field [0001] The invention relates to a lubricating oil passage of an engine cylinder head, in particular to a VVT lubricating oil passage with a hydraulic tappet oil passage. Background technique [0002] The VVT ​​oil supply oil circuit of the existing engine with VVT technology can be found in the patent (application number 200710195892.5, VVT engine lubricating oil circuit). When the shaft phase needs to be adjusted, the time for VVT to adjust the camshaft phase becomes longer and the speed becomes slower, resulting in poorer response of VVT, thereby limiting the performance of the VVT ​​system. Contents of the invention [0003] The purpose of the present invention is to provide a double VVT ​​engine lubricating oil passage with hydraulic tappet oil passage, which has a simple structure, is easy to process, can shorten and simplify the oil passage of the VVT ​​system, and ensures the normal lubrication and operation of the various parts of the engine. Can i...

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Problems solved by technology

[0002] For the VVT ​​oil supply oil circuit of the existing engine with VVT technology, see the patent (application number 200710195892.5, VVT engine lubricating oil circuit), the structure is relatively complicated, and the oil circuit There are multiple direction changes in the direction, and the pressure loss of the system increases. When the camshaft phase needs to be adjusted, the time for VVT to adjust the camshaft phase becomes longer and the speed becomes slower, which makes the response of VVT worse, thus limiting the performance of the VVT ​​system.

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