(?) (?)按(An)制(Zhi)动(Dong)蹄(Ti)运(Yun)动(Dong)方(Fang)向(Xiang)
(?) (?)鼓(Gu)式(Shi)制(Zhi)动(Dong)器(Qi)是(Shi)利(Li)用(Yong)制(Zhi)动(Dong)蹄(Ti)片(Pian)挤(Ji)压(Ya)制(Zhi)动(Dong)鼓(Gu)而(?)获(Huo)得(De)制(Zhi)动(Dong)力(Li)的(De)，(?)可(Ke)分(Fen)为(Wei)内(Nei)张(Zhang)式(Shi)和(He)外(Wai)束(Shu)式(Shi)两(Liang)种(Zhong)。(?)内(Nei)张(Zhang)鼓(Gu)式(Shi)制(Zhi)动(Dong)器(Qi)是(Shi)以(Yi)制(Zhi)动(Dong)鼓(Gu)的(De)内(Nei)圆(Yuan)柱(Zhu)面(Mian)为(Wei)工(Gong)作(Zuo)表(Biao)面(Mian)，(?)在(Zai)现(Xian)代(Dai)汽(Qi)车(Che)上(Shang)广(Guang)泛(Fan)使(Shi)用(Yong);外(Wai)束(Shu)鼓(Gu)式(Shi)制(Zhi)动(Dong)器(Qi)则(Ze)是(Shi)以(Yi)制(Zhi)动(Dong)鼓(Gu)的(De)外(Wai)圆(Yuan)柱(Zhu)面(Mian)为(Wei)工(Gong)作(Zuo)表(Biao)面(Mian)，(?)目(Mu)前(Qian)只(Zhi)用(Yong)作(Zuo)极(Ji)少(Shao)数(Shu)汽(Qi)车(Che)的(De)驻(Zhu)车(Che)制(Zhi)动(Dong)器(Qi)。(?)
(?) (?)按(An)促(Cu)动(Dong)装(Zhuang)置(Zhi)
(?) (?)鼓(Gu)式(Shi)制(Zhi)动(Dong)器(Qi)根(Gen)据(Ju)制(Zhi)动(Dong)蹄(Ti)张(Zhang)开(Kai)装(Zhuang)置(Zhi)(也(Ye)称(Cheng)促(Cu)动(Dong)装(Zhuang)置(Zhi))形(Xing)式(Shi)的(De)不(Bu)同(Tong)，(?)可(Ke)分(Fen)为(Wei)轮(Lun)缸(Gang)式(Shi)制(Zhi)动(Dong)器(Qi)和(He)凸(Tu)轮(Lun)式(Shi)制(Zhi)动(Dong)器(Qi)，(?)如(Ru)图(Tu)1所(Suo)示(Shi)。(?)轮(Lun)缸(Gang)式(Shi)制(Zhi)动(Dong)器(Qi)以(Yi)液(Ye)压(Ya)制(Zhi)动(Dong)轮(Lun)缸(Gang)作(Zuo)为(Wei)制(Zhi)动(Dong)蹄(Ti)促(Cu)动(Dong)装(Zhuang)置(Zhi)，(?)多(Duo)为(Wei)液(Ye)压(Ya)制(Zhi)动(Dong)系(Xi)统(Tong)所(Suo)采(Cai)用(Yong);凸(Tu)轮(Lun)式(Shi)制(Zhi)动(Dong)器(Qi)以(Yi)凸(Tu)轮(Lun)作(Zuo)为(Wei)促(Cu)动(Dong)装(Zhuang)置(Zhi)，(?)多(Duo)为(Wei)气(Qi)压(Ya)制(Zhi)动(Dong)系(Xi)统(Tong)所(Suo)采(Cai)用(Yong)。(?)
(?) (?)按(An)制(Zhi)动(Dong)蹄(Ti)受(Shou)力(Li)
(?) (?)轮(Lun)缸(Gang)式(Shi)制(Zhi)动(Dong)器(Qi)按(An)制(Zhi)动(Dong)蹄(Ti)的(De)受(Shou)力(Li)情(Qing)况(Kuang)不(Bu)同(Tong)，(?)可(Ke)分(Fen)为(Wei)领(Ling)从(Cong)蹄(Ti)式(Shi)、(?)双(Shuang)领(Ling)蹄(Ti)式(Shi)(单(Dan)向(Xiang)作(Zuo)用(Yong)、(?)双(Shuang)向(Xiang)作(Zuo)用(Yong))、(?)双(Shuang)从(Cong)蹄(Ti)式(Shi)、(?)自(Zi)增(Zeng)力(Li)式(Shi)(单(Dan)向(Xiang)作(Zuo)用(Yong)、(?)双(Shuang)向(Xiang)作(Zuo)用(Yong))等(Deng)类(Lei)型(Xing)。(?)
(?) (?)(1) 领(Ling)从(Cong)蹄(Ti)式(Shi)制(Zhi)动(Dong)器(Qi)(leading trailing shoe brake)
(?) (?)领(Ling)从(Cong)蹄(Ti)式(Shi)制(Zhi)动(Dong)器(Qi)的(De)结(Jie)构(Gou)如(Ru)图(Tu)3所(Suo)示(Shi)。(?)制(Zhi)动(Dong)底(Di)板(Ban)5 固(Gu)定(Ding)在(Zai)后(Hou)桥(Qiao)壳(Ke)或(Huo)前(Qian)桥(Qiao)转(Zhuan)向(Xiang)节(Jie)凸(Tu)缘(Yuan)上(Shang)，(?)在(Zai)制(Zhi)动(Dong)底(Di)板(Ban)的(De)下(Xia)部(Bu)装(Zhuang)有(You)两(Liang)个(Ge)偏(Pian)心(Xin)的(De)调(Diao)整(Zheng)螺(Luo)钉(Ding)1，(?)两(Liang)个(Ge)制(Zhi)动(Dong)蹄(Ti)11、(?)12 的(De)下(Xia)端(Duan)有(You)孔(Kong)，(?)套(Tao)装(Zhuang)在(Zai)偏(Pian)心(Xin)调(Diao)整(Zheng)螺(Luo)钉(Ding)上(Shang)，(?)并(Bing)用(Yong)锁(Suo)止(Zhi)螺(Luo)母(Mu)3锁(Suo)止(Zhi)。(?)制(Zhi)动(Dong)底(Di)板(Ban)的(De)中(Zhong)部(Bu)装(Zhuang)有(You)两(Liang)制(Zhi)动(Dong)蹄(Ti)托(Tuo)架(Jia)4，(?)以(Yi)限(Xian) 制(Zhi)制(Zhi)动(Dong)蹄(Ti)的(De)轴(Zhou)向(Xiang)位(Wei)置(Zhi)。(?)制(Zhi)动(Dong)蹄(Ti)上(Shang)端(Duan)用(Yong)回(Hui)位(Wei)弹(Dan)簧(Huang)10 拉(La)靠(Kao)在(Zai)制(Zhi)动(Dong)轮(Lun)缸(Gang)9 的(De)顶(Ding)块(Kuai)上(Shang)。(?)制(Zhi)动(Dong)蹄(Ti)的(De)外(Wai)圆(Yuan)面(Mian)上(Shang)，(?)用(Yong)埋(Mai)头(Tou)螺(Luo)钉(Ding)铆(Mao)接(Jie)着(Zhuo)摩(Mo)擦(Ca)衬(Chen)片(Pian)8。(?)作(Zuo)为(Wei)制(Zhi)动(Dong)蹄(Ti)促(Cu)动(Dong)装(Zhuang)置(Zhi)的(De)制(Zhi)动(Dong)轮(Lun)缸(Gang)也(Ye)用(Yong)螺(Luo)钉(Ding)固(Gu)装(Zhuang)在(Zai)制(Zhi)动(Dong)底(Di)板(Ban)上(Shang)。(?)制(Zhi)动(Dong)鼓(Gu)固(Gu)装(Zhuang)在(Zai)车(Che)轮(Lun)轮(Lun)毂(Gu)的(De)凸(Tu)缘(Yuan)上(Shang)，(?)随(Sui)车(Che)轮(Lun)一(Yi)起(Qi)转(Zhuan)动(Dong)。(?)
(?) (?)领(Ling)从(Cong)蹄(Ti)式(Shi)制(Zhi)动(Dong)器(Qi)制(Zhi)动(Dong)效(Xiao)能(Neng)比(Bi)较(Jiao)稳(Wen)定(Ding)，(?)结(Jie)构(Gou)简(Jian)单(Dan)可(Ke)靠(Kao)，(?)便(Bian)于(Yu)安(An)装(Zhuang)，(?)广(Guang)泛(Fan)用(Yong)作(Zuo)货(Huo)车(Che)的(De)前(Qian)、(?)后(Hou)轮(Lun)制(Zhi)动(Dong)器(Qi)和(He)轿(Jiao)车(Che)的(De)后(Hou)轮(Lun)制(Zhi)动(Dong)器(Qi)。(?)
(?) (?)(2) 双(Shuang)领(Ling)蹄(Ti)式(Shi)制(Zhi)动(Dong)器(Qi)(two leading shoe brake)
(?) (?)在(Zai)制(Zhi)动(Dong)鼓(Gu)正(Zheng)向(Xiang)旋(Xuan)转(Zhuan)时(Shi)，(?)双(Shuang)领(Ling)蹄(Ti)式(Shi)制(Zhi)动(Dong)器(Qi)的(De)两(Liang)制(Zhi)动(Dong)蹄(Ti)均(Jun)为(Wei)领(Ling)蹄(Ti)的(De)制(Zhi)动(Dong)器(Qi)称(Cheng)为(Wei)双(Shuang)领(Ling)蹄(Ti)制(Zhi)动(Dong)器(Qi)。(?)
(?) (?)两(Liang)制(Zhi)动(Dong)蹄(Ti)各(Ge)用(Yong)一(Yi)个(Ge)单(Dan)活(Huo)塞(Sai)式(Shi)制(Zhi)动(Dong)轮(Lun)缸(Gang) 2 促(Cu)动(Dong)，(?)且(Qie)两(Liang)套(Tao)制(Zhi)动(Dong)蹄(Ti)、(?)制(Zhi)动(Dong)轮(Lun)缸(Gang)、(?)支(Zhi)承(Cheng)销(Xiao)和(He)调(Diao)整(Zheng)凸(Tu)轮(Lun)等(Deng)在(Zai)制(Zhi)动(Dong)底(Di)板(Ban)上(Shang)的(De)布(Bu)置(Zhi)是(Shi)中(Zhong)心(Xin)对(Dui)称(Cheng)的(De)，(?)以(Yi)代(Dai)替(Ti)领(Ling)从(Cong)蹄(Ti)式(Shi)制(Zhi)动(Dong)器(Qi)中(Zhong)的(De)轴(Zhou)对(Dui)称(Cheng)布(Bu)置(Zhi)。(?)等(Deng)直(Zhi)径(Jing)的(De)两(Liang)个(Ge)制(Zhi)动(Dong)轮(Lun)缸(Gang)可(Ke)借(Jie)油(You)管(Guan)连(Lian)通(Tong)，(?)使(Shi)其(Qi)中(Zhong)油(You)压(Ya)相(Xiang)等(Deng)。(?)这(Zhe)样(Yang)，(?)在(Zai)汽(Qi)车(Che)前(Qian)进(Jin)时(Shi)，(?)两(Liang)制(Zhi)动(Dong)蹄(Ti)均(Jun)为(Wei)领(Ling)蹄(Ti);但(Dan)在(Zai)倒(Dao)车(Che)时(Shi)，(?)两(Liang)制(Zhi)动(Dong)蹄(Ti)均(Jun)变(Bian)为(Wei)从(Cong)蹄(Ti)。(?)由(You)此(Ci)可(Ke)见(Jian)，(?)这(Zhe)种(Zhong)双(Shuang)领(Ling)蹄(Ti)式(Shi)制(Zhi)动(Dong)器(Qi)具(Ju)有(You)单(Dan)向(Xiang)作(Zuo)用(Yong)，(?)在(Zai)前(Qian)进(Jin)时(Shi)制(Zhi)动(Dong)效(Xiao)能(Neng)好(Hao)，(?)倒(Dao)车(Che)时(Shi)制(Zhi)动(Dong)效(Xiao)能(Neng)大(Da)大(Da)下(Xia)降(Jiang)，(?)且(Qie)不(Bu)便(Bian)安(An)装(Zhuang)驻(Zhu)车(Che)制(Zhi)动(Dong)器(Qi)，(?)故(Gu)一(Yi)般(Ban)不(Bu)用(Yong)作(Zuo)后(Hou)轮(Lun)制(Zhi)动(Dong)器(Qi);但(Dan)两(Liang)制(Zhi)动(Dong)蹄(Ti)片(Pian)受(Shou)力(Li)相(Xiang)同(Tong)，(?)磨(Mo)损(Sun)均(Jun)匀(Yun)，(?)且(Qie)制(Zhi)动(Dong)蹄(Ti)片(Pian)作(Zuo)用(Yong)于(Yu)制(Zhi)动(Dong)鼓(Gu)的(De)力(Li)量(Liang)是(Shi)平(Ping)衡(Heng)的(De)，(?)即(Ji)单(Dan)向(Xiang)作(Zuo)用(Yong)双(Shuang)领(Ling)蹄(Ti)制(Zhi)动(Dong)器(Qi)属(Shu)于(Yu)平(Ping)衡(Heng)式(Shi)制(Zhi)动(Dong)器(Qi)。(?)
(?) (?)如(Ru)果(Guo)能(Neng)使(Shi)单(Dan)向(Xiang)作(Zuo)用(Yong)双(Shuang)领(Ling)蹄(Ti)制(Zhi)动(Dong)器(Qi)的(De)两(Liang)制(Zhi)动(Dong)蹄(Ti)的(De)支(Zhi)承(Cheng)销(Xiao)和(He)促(Cu)动(Dong)力(Li)作(Zuo)用(Yong)点(Dian)位(Wei)置(Zhi)互(Hu)换(Huan)，(?)那(Na)么(Me)在(Zai)倒(Dao)车(Che)制(Zhi)动(Dong)时(Shi)就(Jiu)可(Ke)以(Yi)得(De)到(Dao)与(Yu)前(Qian)进(Jin)制(Zhi)动(Dong)时(Shi)相(Xiang)同(Tong)的(De)制(Zhi)动(Dong)效(Xiao)果(Guo)。(?)双(Shuang)向(Xiang)作(Zuo)用(Yong)双(Shuang)领(Ling)蹄(Ti)制(Zhi)动(Dong)器(Qi)(dual two leadingshoe brake)的(De)设(She)计(Ji)就(Jiu)是(Shi)基(Ji)于(Yu)此(Ci)设(She)想(Xiang)，(?)该(Gai)类(Lei)制(Zhi)动(Dong)器(Qi)的(De)制(Zhi)动(Dong)蹄(Ti)在(Zai)制(Zhi)动(Dong)鼓(Gu)正(Zheng)、(?)反(Fan)向(Xiang)旋(Xuan)转(Zhuan)时(Shi)均(Jun)为(Wei)领(Ling)蹄(Ti)。(?)
(?) (?)若(Ruo)将(Jiang)装(Zhuang)有(You)双(Shuang)领(Ling)蹄(Ti)制(Zhi)动(Dong)器(Qi)的(De)汽(Qi)车(Che)左(Zuo)、(?)右(You)两(Liang)侧(Ce)车(Che)轮(Lun)制(Zhi)动(Dong)器(Qi)对(Dui)调(Diao)安(An)装(Zhuang)，(?)便(Bian)成(Cheng)为(Wei)在(Zai)制(Zhi)动(Dong)鼓(Gu)正(Zheng)向(Xiang)旋(Xuan)转(Zhuan)时(Shi)两(Liang)制(Zhi)动(Dong)蹄(Ti)均(Jun)为(Wei)从(Cong)蹄(Ti)的(De)双(Shuang)从(Cong)蹄(Ti)式(Shi)制(Zhi)动(Dong)器(Qi)(two trailing shoe brake)。(?)显(Xian)然(Ran)，(?)双(Shuang)从(Cong)蹄(Ti)式(Shi)制(Zhi)动(Dong)器(Qi)前(Qian)进(Jin)时(Shi)制(Zhi)动(Dong)效(Xiao)能(Neng)低(Di)于(Yu)领(Ling)从(Cong)蹄(Ti)式(Shi)制(Zhi)动(Dong)器(Qi)和(He)双(Shuang)领(Ling)蹄(Ti)式(Shi)制(Zhi)动(Dong)器(Qi)，(?)但(Dan)其(Qi)制(Zhi)动(Dong)效(Xiao)能(Neng)对(Dui)摩(Mo)擦(Ca)因(Yin)数(Shu)变(Bian)化(Hua)的(De)敏(Min)感(Gan)程(Cheng)度(Du)较(Jiao)小(Xiao)，(?)即(Ji)具(Ju)有(You)良(Liang)好(Hao)的(De)制(Zhi)动(Dong)效(Xiao)能(Neng)稳(Wen)定(Ding)性(Xing)，(?)只(Zhi)在(Zai)少(Shao)数(Shu)保(Bao)证(Zheng)制(Zhi)动(Dong)可(Ke)靠(Kao)性(Xing)的(De)轿(Jiao)车(Che)上(Shang)采(Cai)用(Yong)。(?)
(?) (?)(3) 自(Zi)增(Zeng)力(Li)式(Shi)制(Zhi)动(Dong)器(Qi)(servo brake)
(?) (?)自(Zi)增(Zeng)力(Li)式(Shi)制(Zhi)动(Dong)器(Qi)可(Ke)分(Fen)为(Wei)单(Dan)向(Xiang)自(Zi)增(Zeng)力(Li)式(Shi)(uni-servobrake)和(He)双(Shuang)向(Xiang)自(Zi)增(Zeng)力(Li)式(Shi)(duo-servo brake)两(Liang)种(Zhong)，(?)在(Zai)结(Jie)构(Gou)上(Shang)只(Zhi)是(Shi)制(Zhi)动(Dong)轮(Lun)缸(Gang)中(Zhong)的(De)活(Huo)塞(Sai)数(Shu)目(Mu)不(Bu)同(Tong)而(?)已(Yi)。(?)单(Dan)向(Xiang)自(Zi)增(Zeng)力(Li)制(Zhi)动(Dong)器(Qi)只(Zhi)在(Zai)汽(Qi)车(Che)前(Qian)进(Jin)时(Shi)起(Qi)自(Zi)增(Zeng)力(Li)作(Zuo)用(Yong)，(?)使(Shi)用(Yong)单(Dan)活(Huo)塞(Sai)制(Zhi)动(Dong)轮(Lun)缸(Gang);双(Shuang)向(Xiang)自(Zi)增(Zeng)力(Li)制(Zhi)动(Dong)器(Qi)在(Zai)汽(Qi)车(Che)前(Qian)进(Jin)或(Huo)倒(Dao)车(Che)制(Zhi)动(Dong)时(Shi)都(Du)能(Neng)起(Qi)自(Zi)增(Zeng)力(Li)作(Zuo)用(Yong)，(?)使(Shi)用(Yong)双(Shuang)活(Huo)塞(Sai)制(Zhi)动(Dong)轮(Lun)缸(Gang)。(?)
(?) (?)自(Zi)增(Zeng)力(Li)式(Shi)制(Zhi)动(Dong)器(Qi)的(De)增(Zeng)力(Li)原(Yuan)理(Li)是(Shi)，(?)利(Li)用(Yong)可(Ke)调(Diao)顶(Ding)杆(Gan)体(Ti)浮(Fu)动(Dong)铰(Jiao)接(Jie)的(De)制(Zhi)动(Dong)蹄(Ti)来(Lai)代(Dai)替(Ti)固(Gu)定(Ding)的(De)偏(Pian)心(Xin)销(Xiao)式(Shi)制(Zhi)动(Dong)蹄(Ti)，(?)利(Li)用(Yong)前(Qian)蹄(Ti)的(De)助(Zhu)势(Shi)推(Tui)动(Dong)后(Hou)蹄(Ti)，(?)使(Shi)总(Zong)的(De)摩(Mo)擦(Ca)力(Li)矩(Ju)得(De)以(Yi)增(Zeng)大(Da)，(?)起(Qi)到(Dao)自(Zi)动(Dong)增(Zeng)力(Li)的(De)作(Zuo)用(Yong)。(?)如(Ru)图(Tu)6所(Suo)示(Shi)为(Wei)单(Dan)向(Xiang)自(Zi)增(Zeng)力(Li)制(Zhi)动(Dong)器(Qi)。(?)第(Di) 一(Yi)制(Zhi)动(Dong)蹄(Ti)1和(He)第(Di)二(?)制(Zhi)动(Dong)蹄(Ti)6 的(De)上(Shang)端(Duan)被(Bei)各(Ge)自(Zi)的(De)制(Zhi)动(Dong)蹄(Ti)回(Hui)位(Wei)弹(Dan)簧(Huang)2 拉(La)拢(Long)，(?)并(Bing)以(Yi)铆(Mao)于(Yu)腹(Fu)板(Ban)上(Shang)端(Duan)两(Liang)侧(Ce)的(De)夹(Jia)板(Ban)3 的(De)内(Nei)凹(Ao)弧(Hu)面(Mian)支(Zhi)靠(Kao)着(Zhuo)支(Zhi)承(Cheng)销(Xiao)4。(?)两(Liang)制(Zhi)动(Dong)蹄(Ti)下(Xia)端(Duan)以(Yi)凹(Ao)入(Ru)的(De)平(Ping)面(Mian)分(Fen)别(Bie)浮(Fu)动(Dong)支(Zhi)承(Cheng)在(Zai)可(Ke)调(Diao)顶(Ding)杆(Gan)体(Ti)两(Liang)端(Duan)的(De)直(Zhi)槽(Cao)底(Di)面(Mian)上(Shang)，(?)并(Bing)用(Yong)拉(La)紧(Jin)弹(Dan)簧(Huang)8拉(La)紧(Jin)。(?)
(?) (?)所(Suo)示(Shi)为(Wei)双(Shuang)向(Xiang)自(Zi)增(Zeng)力(Li)制(Zhi)动(Dong)器(Qi)。(?)制(Zhi)动(Dong)蹄(Ti)的(De)上(Shang)端(Duan)两(Liang)侧(Ce)铆(Mao)有(You)夹(Jia)板(Ban)4，(?)用(Yong)前(Qian)后(Hou)蹄(Ti)回(Hui)位(Wei)弹(Dan)簧(Huang)6 和(He)3 将(Jiang)夹(Jia)板(Ban)拉(La)靠(Kao)在(Zai)支(Zhi)承(Cheng)销(Xiao)上(Shang)，(?)两(Liang)制(Zhi)动(Dong)蹄(Ti)的(De)下(Xia)端(Duan)由(You)拉(La)紧(Jin)弹(Dan)簧(Huang)9 拉(La)靠(Kao)在(Zai)可(Ke)调(Diao)顶(Ding)杆(Gan)体(Ti)8 两(Liang)端(Duan)直(Zhi)槽(Cao)的(De)底(Di)平(Ping)面(Mian)上(Shang)。(?)可(Ke)调(Diao)顶(Ding)杆(Gan)体(Ti)是(Shi)浮(Fu)动(Dong)的(De)。(?)制(Zhi)动(Dong)轮(Lun)缸(Gang)处(Chu)于(Yu)支(Zhi)承(Cheng)销(Xiao)稍(Shao)下(Xia)的(De)位(Wei)置(Zhi)。(?)
(?) (?)在(Zai)基(Ji)本(Ben)结(Jie)构(Gou)参(Can)数(Shu)和(He)制(Zhi)动(Dong)轮(Lun)缸(Gang)工(Gong)作(Zuo)压(Ya)力(Li)相(Xiang)同(Tong)的(De)条(Tiao)件(Jian)下(Xia)，(?)自(Zi)增(Zeng)力(Li)式(Shi)制(Zhi)动(Dong)器(Qi)由(You)于(Yu)对(Dui)摩(Mo)擦(Ca)助(Zhu)势(Shi)作(Zuo)用(Yong)的(De)利(Li)用(Yong)，(?)制(Zhi)动(Dong)效(Xiao)能(Neng)好(Hao)，(?)但(Dan)其(Qi)制(Zhi)动(Dong)效(Xiao)能(Neng)对(Dui)摩(Mo)擦(Ca)因(Yin)数(Shu)的(De)依(Yi)赖(Lai)性(Xing)大(Da)，(?)因(Yin)而(?)其(Qi)稳(Wen)定(Ding)性(Xing)差(Cha);此(Ci)外(Wai)，(?)在(Zai)制(Zhi)动(Dong)过(Guo)程(Cheng)中(Zhong)自(Zi)增(Zeng)力(Li)式(Shi)制(Zhi)动(Dong)器(Qi)制(Zhi)动(Dong)力(Li)矩(Ju)的(De)增(Zeng)长(Chang)在(Zai)某(Mou)些(Xie)情(Qing)况(Kuang)下(Xia)显(Xian)得(De)过(Guo)于(Yu)急(Ji)速(Su)。(?)因(Yin)此(Ci)，(?)单(Dan)向(Xiang)自(Zi)增(Zeng)力(Li)式(Shi)制(Zhi)动(Dong)器(Qi)只(Zhi)用(Yong)于(Yu)中(Zhong)、(?)轻(Qing)型(Xing)汽(Qi)车(Che)的(De)前(Qian)轮(Lun)，(?)而(?)双(Shuang)向(Xiang)自(Zi)增(Zeng)力(Li)式(Shi)制(Zhi)动(Dong)器(Qi)由(You)于(Yu)可(Ke)兼(Jian)作(Zuo)驻(Zhu)车(Che)制(Zhi)动(Dong)器(Qi)而(?)广(Guang)泛(Fan)用(Yong)于(Yu)轿(Jiao)车(Che)后(Hou)轮(Lun)。(?)
