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Camshaft assembly of engine with variable valve opening duration

A technology of opening duration and camshaft, which is applied in the direction of engine components, engine control, combustion engine, etc., and can solve the problems of long duration of valve opening, difficulty in sufficient engine power and economy, etc.

Active Publication Date: 2012-10-10
GREAT WALL MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Improving the charging efficiency of the engine is an effective way to improve the power and economy of the vehicle. At present, VVT technology (variable valve timing system) has been widely used in the engine. The existing technology only adjusts the valve timing according to the different working conditions of the engine, that is, Adjust the opening and closing timing of the intake and exhaust valves to increase the amount of air entering the combustion chamber, which can effectively improve the power of the engine and make the fuel burn more fully; When the load is heavy, more air intake is required, and the duration of the valve opening is longer at this time. The existing VVT technology cannot meet the requirements. Under complex and changeable engine operating conditions, it is difficult to fully engine power and economy.

Method used

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  • Camshaft assembly of engine with variable valve opening duration
  • Camshaft assembly of engine with variable valve opening duration
  • Camshaft assembly of engine with variable valve opening duration

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Embodiment Construction

[0027] Referring to Fig. 1 and Fig. 2, the present invention includes a group of valve opening duration control units whose number matches the number of engine cylinders, a camshaft 1 and a variable valve timing control mechanism 8, and the valve opening duration control unit is connected with the camshaft 1, the camshaft 1 is a spline shaft, and the variable valve phase control mechanism 8 is assembled on the input end of the camshaft 1.

[0028] see Figure 3 ~ Figure 12 , the valve opening duration control unit of the present invention includes a sleeve cam A 3, a sleeve cam B 4, an angle control sleeve 5, an actuator 6 and a controller 7, and the sleeve cam A 3 is provided with a cam at one end. The sleeve structure has a spline tooth 3-1 on the outer wall of the other end, a spline tooth groove Ⅰ 3-2 on the inner wall, and a positioning pin on the cam end of the inner wall of the sleeve cam A. Slot 3-3, the other end is provided with locking groove 3-4, and the sleeve ca...

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PUM

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Abstract

The invention discloses a camshaft assembly of an engine with variable valve opening duration and aims to improve the inflating efficiency of the engine. The camshaft assembly comprises a group of valve opening duration control units of which the number is matched with that of cylinders of the engine, a camshaft and a variable gas distribution phase position control mechanism, wherein the valve opening duration control units are matched with the camshaft; the camshaft is a spline shaft; and the variable gas distribution phase position control mechanism is arranged at an input end of the camshaft. The camshaft assembly has the characteristics of stable performance and wide application range; and the valve opening duration and the opening and closing time can be adjusted according to working conditions of the engine, so that the inflating efficiency of the engine is optimal under various working conditions, and the dynamic property, economy and an emission index can be improved.

Description

technical field [0001] The invention relates to an engine camshaft assembly, in particular to a camshaft assembly capable of adjusting the gas distribution phase and valve opening duration of an automobile engine, and belongs to the technical field of engines. Background technique [0002] With the increasingly severe situation of global oil and energy, it has become an urgent task to maximize the thermal efficiency of automobile engines and improve fuel economy in order to slow down the excessive consumption of energy. [0003] Improving the charging efficiency of the engine is an effective way to improve the power and economy of the vehicle. At present, VVT technology (variable valve timing system) has been widely used in the engine. The existing technology only adjusts the valve timing according to the different working conditions of the engine, that is, Adjust the opening and closing timing of the intake and exhaust valves to increase the amount of air entering the combu...

Claims

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Application Information

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IPC IPC(8): F02D13/02F01L1/047F01L1/34
CPCY02T10/18Y02T10/12
Inventor 伊丽花陈彦如
Owner GREAT WALL MOTOR CO LTD
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