CVVL valve lift measuring device and measuring method thereof
A measuring device and valve lift technology, applied in the field of vehicles, can solve problems such as poor linearity and large valve lift error, and achieve the effect of real and effective valve lift and simple method
Pending Publication Date: 2022-01-11
CHINA FIRST AUTOMOBILE
View PDF1 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] The object of the present invention is to: provide a kind of CVVL valve lift measuring device and its measuring method, to solve the problem that the calibration method of measuring the valve lift of CVVL in the related art has poor linearity, resulting in a large error in the measured valve lift
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0043] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0044]In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, o...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to the technical field of vehicles, and particularly discloses a CVVL valve lift measuring device and a measuring method thereof. The CVVL valve lift measuring device comprises a dynamometer, an engine, a measuring assembly and a calibration assembly, wherein the engine comprises a cylinder body, a cylinder cover, a valve, a crankshaft, a cam shaft, a chain connecting the crankshaft and the cam shaft, and a rocker arm mechanism; the cam shaft can drive the rocker arm mechanism to swing so as to open the valve, the measuring assembly comprises a support fixedly arranged in the air cylinder cavity and an eddy current displacement sensor connected to the support in a threaded mode, the eddy current displacement sensor is used for detecting displacement of the valve in the lift process, and the calibration assembly is used for calibrating the relation between the detection voltage of the eddy current displacement sensor and the valve displacement. After calibration is completed, the calibration assembly can be detached, the crankshaft of the engine is reversely dragged by the dynamometer, the actual displacement of the valve is detected in the cylinder cavity through the eddy current displacement sensor, it is guaranteed that the valve lift is true and effective, and the method is simple.
Description
technical field [0001] The invention relates to the technical field of vehicles, in particular to a CVVL valve lift measuring device and a measuring method thereof. Background technique [0002] The traditional engine valve drive system uses a mechanical cam mechanism to control the intake and exhaust valves. Since the lift and valve timing of the valves are fixed, they cannot be adjusted during engine operation. Usually, they can only be guaranteed at a certain Optimize engine performance under operating conditions. With the high-speed development of gasoline engines in cars, the disadvantages of fixed valve timing and lift are becoming more and more prominent. [0003] In this regard, a continuously variable valve lift actuator (CVVL) is proposed in the prior art, which can provide suitable valve opening and closing timing or lift under the speed and load of the entire working range of the engine, thereby improving the engine intake and valve lift. Exhaust performance, b...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/02G01M15/02
CPCG01B7/02G01B5/003G01M15/02Y02T10/12
Inventor 韩令海李天成史鹏礼董爽吴仁哲解小凯
Owner CHINA FIRST AUTOMOBILE