| 词条 | Kramer graph |
| 释义 | {{no footnotes|date=October 2017}} A Kramer graph is a specific multiple-line 2D geometric symbolic representation of the characteristics of intake, scavenging and exhaust components in a two-stroke cycle engine. They are typically used to visualize the opening time versus area and/ or lift of the following components:
They do not show the specific configuration of ports like in a port-map, which enables it to illustrate a more useful visualization of port area distribution, This could be useful because different types of port configurations could have the same opening time and area. In these graphs the X-axis represents the crankshaft angle (θ) in degrees, and the left Y-axis represents the open area in any square unit of measure such as cm². To discern the different types of ports each type is given a designated color. For example, (commonly used):
Kramer graphs are named after Dutch engineer Hans Kramer, who is considered to have been the first to use this type of graph in a publication on the effect of port shape and area on two-stroke cycle engine performance. 5 : Two-stroke engine technology|Engine technology|Internal combustion piston engines|Motorcycle engines|Visualization (graphic) |
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