首页Home › 科学与工程Science & Engineering
🏎️ 发动机排量Engine Displacement Calculator
排量 = π/4 × 缸径² × 行程 × 缸数。本地处理。可设置「缸径 mm」、「行程 mm」、「缸数」。Displacement = π/4 × bore² × stroke × cylinders. Processed locally. Settings: Bore mm, Stroke mm, Cylinders.
使用说明与常见问题How-to & FAQ
「发动机排量」是什么？What is the Engine Displacement Calculator tool?
排量 = π/4 × 缸径² × 行程 × 缸数。本地处理。可设置「缸径 mm」、「行程 mm」、「缸数」。Displacement = π/4 × bore² × stroke × cylinders. Processed locally. Settings: Bore mm, Stroke mm, Cylinders.
如何使用「发动机排量」？How do I use the Engine Displacement Calculator tool?
在「发动机排量」中，填写「缸径 mm」、「行程 mm」、「缸数」等参数，结果会随输入实时计算并显示在下方。In the Engine Displacement Calculator: Fill in "Bore mm", "Stroke mm", "Cylinders"; results are recalculated instantly as you type.
怎么算单缸排量？How do I get the displacement of one cylinder?
把缸数设为 1 即可：单缸排量 = π ÷ 4 × 缸径² × 行程。缸径和行程用 mm 时，结果除以 1000 得到 cm³（cc）。Set cylinders to 1: one cylinder = π ÷ 4 × bore² × stroke. With bore and stroke in mm, divide by 1000 for cm³ (cc).
能举个计算实例吗？Can you show a worked example?
例如在「发动机排量」中填 缸径 mm = 86，行程 mm = 86，缸数 = 4，结果区显示：排量：1,998.2 cc；升：2 L；立方英寸：121.9 in³For example, entering Bore mm = 86, Stroke mm = 86, Cylinders = 4 in the Engine Displacement Calculator gives: Displacement: 1,998.2 cc; Litres: 2 L; Cubic inches: 121.9 in³
哪些输入会被检查？Which inputs are validated?
「发动机排量」会检查这些输入——「缸径 mm」、「行程 mm」：必须填写，须大于 0；「缸数」：必须填写；绝对值超过 10¹⁵ 的数也会被拒绝。不符合时结果区显示具体提示，不会给出数字。The Engine Displacement Calculator checks its inputs — "Bore mm", "Stroke mm": required, must be greater than 0; "Cylinders": required; numbers above 10¹⁵ in absolute value are rejected too. When a value fails, the result area names the problem instead of showing a number.
有哪些选项可以调整？What options can I adjust?
「发动机排量」的设置：「缸径 mm」默认 86；「行程 mm」默认 86；「缸数」默认 4。每次生成结果都按当前设置处理。Settings in the Engine Displacement Calculator — "Bore mm" default 86; "Stroke mm" default 86; "Cylinders" default 4. The result always uses the current settings.
计算结果可以用于作业或工程吗？Can I use the results for homework or engineering?
「发动机排量」使用教科书标准公式（公式写在说明和常见问题中），适合学习和估算核对；涉及安全的工程设计请以规范和实测为准。The Engine Displacement Calculator uses standard textbook formulas (given in the description and FAQ), which is good for learning and checking estimates; for safety-critical engineering follow codes and measured values.
「发动机排量」免费吗？需要注册吗？Is the Engine Displacement Calculator free? Do I need an account?
「发动机排量」完全免费，无需注册或安装，打开网页即可使用，手机和电脑都能用；输入的内容只在你的浏览器本地处理。The Engine Displacement Calculator is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.