Hyundai Motor starters all the electricity used, the function of starter is quickly and reliably start the engine, so that the normal work of the engine. Therefore, in the choice of engines, must be compatible with the identified good starter; Of course, must choose a good starter with the engine and the transmission ratio of the best fit of the battery charge level. In order to make the engine can be quickly and reliably, the starter must have sufficient power, otherwise it may not start the engine, or an increase in the number of repeat start, start-up time, the burning of starter, the fuel consumption of too many negative impact.1 starter choice of rated power parameters 1.1 engine starter drive minimum speed
Starter must be launched to make the engine work a minimum speed, the rated speed is the starter, and starter of the rated power P determined by the minimum start-up engine speed n_f (unit: r / min) and huge start-up resistance M_f (unit: Nm), that is: P ≥ (M_f × n_f) / 9549.3KW.The engine is determined, start the engine torque and minimum speed start-up will have been identified. In accordance with the conditions of vaporization of gasoline engines in the 0 ~ 20 degrees starting at the minimum speed is generally 35 r / min ~ 40 r / min, at a lower temperature in order to guarantee the start-up reliability and wear and tear to consider in order to in paragraph 1 times after detonation engine can work, generally take the lowest gasoline engine start-up speed for the 50r / min ~ 70 r / min; diesel engines rely on compression ignition, the minimum start-up speed is higher. Because the speed is low, as a result of compression time, heat dissipation, increased leakage, it will cause the end of compression stroke to

現(xiàn)代汽車全部采用電力起動(dòng)機(jī)，起動(dòng)機(jī)的功能就是迅速、可靠地起動(dòng)發(fā)動(dòng)機(jī)，使發(fā)動(dòng)機(jī)正常工作。所以在選擇發(fā)動(dòng)機(jī)，必須確定好與之配套的起動(dòng)機(jī)；當(dāng)然還必須選擇好起動(dòng)機(jī)與發(fā)動(dòng)機(jī)的最佳傳動(dòng)比及適配的蓄電池的電荷量等。為了使發(fā)動(dòng)機(jī)能迅速、可靠地起，起動(dòng)機(jī)必須具有足夠的功率，否則就有可能起動(dòng)不了發(fā)動(dòng)機(jī)，或出現(xiàn)重復(fù)起動(dòng)的次數(shù)增多，起動(dòng)時(shí)間延長(zhǎng)，燒毀起動(dòng)機(jī)，消耗過多的燃料等不利的影響。
1.起動(dòng)機(jī)額定功率參數(shù)的選擇
1.1 起動(dòng)機(jī)驅(qū)動(dòng)發(fā)動(dòng)機(jī)的最低工作轉(zhuǎn)速。
起動(dòng)機(jī)必須具有使發(fā)動(dòng)機(jī)發(fā)動(dòng)的最低工作轉(zhuǎn)速，即為起動(dòng)機(jī)的額定轉(zhuǎn)速，而起動(dòng)機(jī)的額定功率P決定于發(fā)動(dòng)機(jī)的最低起動(dòng)轉(zhuǎn)速（單位：r/min）和起動(dòng)阻力鉅(單位：Nm),即：P≥(×)/9549.3KW。
發(fā)動(dòng)機(jī)一經(jīng)確定，發(fā)動(dòng)機(jī)的啟動(dòng)阻力矩和最低起動(dòng)轉(zhuǎn)速也就已經(jīng)確定。根據(jù)汽化條件，汽油發(fā)動(dòng)機(jī)在0~20度時(shí)的最低起動(dòng)轉(zhuǎn)速一般為35 r/ min～40 r/ min ,為了在更低的溫度下保證起動(dòng)的可靠性及考慮各種損耗 ,以便在第 1 次爆震后能使發(fā)動(dòng)機(jī)正常工作 ,一般取汽油發(fā)動(dòng)機(jī)的最低起動(dòng)轉(zhuǎn)速為50r/ min～70 r/ min ; 柴油發(fā)動(dòng)機(jī)靠壓縮點(diǎn)火 ,最低的起動(dòng)轉(zhuǎn)速要高一些。因?yàn)檗D(zhuǎn)速低時(shí),由于壓縮時(shí)間長(zhǎng) , 散熱、漏氣增加 ,就會(huì)使壓縮行程終了時(shí)空氣溫度降低，使燃料不易點(diǎn)燃 ,所以柴油機(jī)的最低起動(dòng)轉(zhuǎn)速比汽油機(jī)要高,其值隨發(fā)動(dòng)機(jī)形式的不同而不同, 一般為 100 r/ min ～200 r/ min , 再根據(jù)選擇好的起動(dòng)機(jī)驅(qū)動(dòng)齒輪與發(fā)動(dòng)機(jī)的齒環(huán)的最佳傳動(dòng)比i (如奧迪轎車的最佳傳動(dòng)比為 1511) ,即可計(jì)算出起動(dòng)機(jī)驅(qū)動(dòng)發(fā)動(dòng)機(jī)的最低驅(qū)動(dòng)轉(zhuǎn)速 。即:
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