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Differential pressure type valve lift control system

A valve lift and control system technology, applied in the direction of engine components, machines/engines, mechanical equipment, etc., can solve problems such as complex system structure, and achieve the effect of simple structure and reasonable design

Inactive Publication Date: 2013-08-07
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its design requires a special control structure, and the entire system structure is complex

Method used

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  • Differential pressure type valve lift control system
  • Differential pressure type valve lift control system

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Embodiment

[0013] like figure 1 and figure 2 Shown, the present invention comprises: cylinder 1, piston 2, cylinder head 3, air intake passage 4, exhaust passage 5, intake valve 6, exhaust valve 7, air compressor intake pipe 8, air compressor 9, engine air intake pipe 10. Turbine exhaust pipe 11, turbine 12, engine exhaust pipe 13, lever 14, tappet 15, first connecting pipe 16, volume cavity 17, strut 18, moving body 19, triangular groove 20 and second connection The pipe 21 and the piston 2 are installed in the space surrounded by the cylinder 1 and are in sealing contact with the inner wall of the cylinder 1. The air outlet of the air inlet passage 4 and the air inlet of the exhaust passage 5 are all connected with the cylinder head, and the air intake The lower end surface of the door 6 and the lower end surface of the exhaust valve 7 are all in the combustion chamber, and the air inlet and outlet of the compressor 9 are respectively connected with the air outlet of the compressor i...

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Abstract

The invention relates to the technical field of machine design, in particular to a differential pressure type valve lift control system. The differential pressure type valve lift control system comprises an intake valve, an exhaust valve, an air compressor, a turbine, a lever, a tappet, a volume cavity, a movable body, a supporting rod and connecting pipes, wherein the movable body is mounted in the volume cavity and is in sealed contact with the inner wall of the volume cavity; a round hole is formed in the upper wall surface of the volume cavity; the lower end of the supporting rod penetrates the round hole in the upper wall surface of the volume cavity to be in contact with an inclined plane of a triangle groove; and the upper end of the supporting rod is in contact with the lever. When pressure in an air intake pipe of a motor is larger than that of an exhaust pipe of the motor, the supporting rod moves downward, the lift of the intake valve is enlarged; and when the pressure in the air intake pipe of the motor is smaller than that of the exhaust pipe of the motor, the supporting rod moves upward, and the lift of the intake valve is lessened. The differential pressure type valve lift control system is reasonable in design, simple in structure, and suitable for motor valve lift for changeable systems.

Description

technical field [0001] The invention relates to a mechanically designed engine intake valve lift adjustment system, in particular to a differential pressure valve lift control system. Background technique [0002] The valve lift of the traditional gasoline engine is fixed and invariable, that is, there is only one cam profile of the camshaft, which makes it impossible for the lift to make the engine respond well in both high-speed and low-speed areas. The valve lift or cam profile design of a traditional gasoline engine is a balanced choice for the engine under all operating conditions. As a result, the engine can neither get the best high-speed efficiency nor the best low-speed torque, but it can get The most balanced performance under all working conditions. The adoption of variable valve lift enables the engine to obtain the required valve lift in both high-speed and low-speed areas, thereby improving the high-speed power and low-speed torque of the engine. [0003] Aft...

Claims

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Application Information

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IPC IPC(8): F01L13/00
Inventor 桂勇崔毅
Owner SHANGHAI JIAO TONG UNIV
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