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批踢踢實業坊 car 板
[問題] 一些考題請教
Jul 4th 2013, 20:04, by sweetycool

作者sweetycool (tina)

站內car

標題[問題] 一些考題請教

時間Thu Jul 4 20:04:32 2013

這幾題考題我GOOGLE過都找不到答案,不知有高手會的? ====================================================================== 1.在汽車的系統中何處可見到凸輪(cam)的應用?簡述其主要功用以及使用上之優缺點 http://zh.wikipedia.org/wiki/%E6%B0%A3%E9%96%80 我只找到這個,但不知道優缺點要如何解釋,除了用在氣門外還有別的地方嗎? 2.汽油引擎的空氣燃料比,在引擎惰速、中等速度或高速時的典型比例為何? 3.一般傳統車輛主要動力(能量)來源為燃油(汽油或柴油),燃油經燃燒後所釋放 之能量,最後提供給車輛之有效驅動能量比例約有若干? 燃油所產生之其它之能量消耗到那裡? 其個別所占之比例各約有若干? 4.何謂機械拖曳 (Mechanical Trail)?機械拖曳對於車輛轉向特性的影響為何? 5.(1)何謂磨胎半徑(Scrub radius)? (2)試說明磨胎半徑為正值、零與負值的個別定義。 (3)試以具有麥弗遜支柱(Macpherson-strut)前懸吊系統的前輪驅動車為例,說明 其磨胎半徑設定對汽車操控的影響。 前兩小題有找到答案但第三小題不知要如何解釋 有高手會的嗎?感恩^^ -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 1.34.105.117

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