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A variable valve lift drive device

A valve lift and driving device technology, applied in the direction of valve devices, engine components, machines/engines, etc., can solve the problems of complex camshaft structure, large mass, and reduced service life of parts, so as to reduce processing costs and fuel consumption The effect of small quantity and quality and simple structure

Active Publication Date: 2018-01-09
HYCET ENGINE SYST JIANGSU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the process of using the variable valve lift driving device to change the valve lift, the camshaft, valve lifter and other related components are subjected to different degrees of impact load, which reduces the service life of the components.
Moreover, the combined camshaft is more complex and heavy than the traditional camshaft, which increases the processing cost and fuel consumption of the engine.

Method used

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  • A variable valve lift drive device
  • A variable valve lift drive device
  • A variable valve lift drive device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] figure 1 It is an exemplary structural diagram of the variable valve lift driving device provided by the embodiment of the present invention. refer to figure 1 , the variable valve lift driving device includes a valve 70, a valve connecting rod 71 connected to the valve 70, a valve rocker arm 72 connected to the valve connecting rod 71, and a camshaft 10 that drives the valve 70 to open or close. A swing arm 20 and a swing arm adjusting frame 30 are arranged between the arm 72 and the camshaft 10, the swing arm 20 is provided with a first rotation center and a second rotation center, and the swing arm adjusting frame 30 is connected to image 3Shown are a first pin shaft 40 and a second pin shaft 50; the first rotation center is coaxially arranged with the first pin shaft 40, and the first rotation center is connected to the first pin shaft 40, and the second pin shaft 50 is fixed Do not move. Among them in figure 1 In the shown placement state, the bottom of the sw...

Embodiment 2

[0052] Figure 4 , Figure 5 and Image 6 It is another exemplary structural diagram of the variable valve lift driving device provided by the embodiment of the present invention. This embodiment and Figure 1 to Figure 3 The difference of the first shown embodiment is that the return spring 80 and the eccentric shaft 60 in the first embodiment are located on the same side of the swing arm adjustment frame 30, and the return spring 80 and the eccentric shaft 60 in the second embodiment are located on the swing arm adjustment frame 30 on both sides. Specifically, in Figure 4 or Figure 5 In the placed state, the end of the middle arm 33 of the swing arm adjustment frame 30 away from the bottom arm 31 is against the eccentric wheel 61, and the lower end of the side arm 32 of the swing arm adjustment frame 30 is provided with Figure 5 or Image 6 For the limiting boss 34 shown, the return spring 80 leans against the limiting boss 34 . The layout of this embodiment can m...

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Abstract

The invention discloses a variable valve lift driving device, which relates to engine components and is invented for improving the service life of the components and reducing the processing cost and fuel consumption of the engine. The variable valve lift driving device includes a valve, a valve connecting rod, a valve rocker arm, and a camshaft, and a swing arm and a swing arm adjusting frame are arranged between the valve rocker arm and the camshaft, and a first rotating arm is arranged on the swing arm center and the second rotation center, the swing arm adjustment frame is connected with the first pin shaft and the second pin shaft; the first rotation center and the first pin shaft are arranged coaxially, and the first rotation center is connected with the first pin shaft, The second pin shaft is fixed; when the camshaft rotates, it drives the swing arm to swing around the first rotation center to drive the valve connecting rod to reciprocate in a straight line to realize the opening or closing of the valve. When the swing arm adjusting frame rotates around the second pin shaft, it drives the swing arm Rotate around the second center of rotation to adjust the position of the first center of rotation. The invention is mainly applicable to engines.

Description

technical field [0001] The invention relates to engine components, in particular to a variable valve lift driving device in the engine. Background technique [0002] The valve is an important part of the engine, which is used to input fuel into the engine and discharge the exhaust gas after combustion. In the field of engines, the valve lift refers to the height that the valve moves from just opening to fully opening, that is, the opening height of the valve. Different cam profiles of the camshafts used in the engine will result in different valve lifts. The valve lift of the traditional engine is fixed, that is, there is only one cam profile of the camshaft, and the lift design is a balance choice for the engine under all working conditions, so it is impossible for the lift to make the engine Both the high-speed and low-speed areas are well responded. As a result, the engine can neither get the best high-speed efficiency nor the best low-speed torque, but only gets a rela...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01L13/00
Inventor 刘涛刘胜强张帅赵国东王龙赵卫平
Owner HYCET ENGINE SYST JIANGSU CO LTD