[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f-tRg1CV-edJRFuLQv2VGUpp2Ahp3ZUxmduiieHs3aHg":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":77},[],"2025-04-15 07:42:21",183032397,[8,9,10,11],"二冲程汽油机指曲轴旋转一周,其活塞经过两个行程完成一个工作循环","二冲程汽油机与四冲程汽油机相比,二冲程汽油机没有进气门和排气门","二冲程汽油机工作的关键为设置在汽缸壁上的进气口、排气口和扫气口","二冲程汽油机和四冲程汽油机的作功行程中,汽油均为点燃",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},16,"df9cfa7fc000b250c476ef7a098e1f71","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F2da265577c155117bd91552c49996549.jpg","智慧农机","work_42814669","内燃机作业","关于汽油机的叙述正确的说法包括( )",[21,32,41,50,59,68,78,87,97,108],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],183032388,[25,26,27,28],"发动机、柴油机","内燃机、外燃机","柴油机、汽油机","燃油机、蒸汽机","根据燃料燃烧的部位不同,热力发动机可分为( )","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":30,"type":31},[],183032389,[36,37,38,39],"活塞从上止点到下止点扫过的容积","活塞在下止点时,其顶部以上的容积","活塞在上止点时,其顶部以上的容积","圆柱形气缸套内部的总容积(体积)","内燃机的气缸排量Vw是指( )",{"answer":42,"createTime":5,"id":43,"options":44,"question":49,"source":30,"type":31},[],183032390,[45,46,47,48],"承受燃气压力并通过连杆传给曲轴","将活塞的往复运动变成曲轴的旋转运动","将燃料燃烧时放出的热能转换为机械能","贮藏和释放能量,帮助曲柄连杆机构越过上、下止点以完成辅助行程","内燃机曲柄连杆机构的功用是( )",{"answer":51,"createTime":5,"id":52,"options":53,"question":58,"source":30,"type":31},[],183032391,[54,55,56,57],"1-3-4-2","1-2-3-4","4-3-2-1","3-4-1-2","关于四缸四冲程内燃机的4个气缸循环作功的顺序叙述正确的是( )",{"answer":60,"createTime":5,"id":61,"options":62,"question":67,"source":30,"type":31},[],183032392,[63,64,65,66],"二汽生产","水冷式","6个气缸","立式直列","某发动机型号为"EQ6100Q",从中可获知该发动机( )等信息",{"answer":69,"createTime":5,"id":70,"options":71,"question":76,"source":30,"type":77},[],183032393,[72,73,74,75],"进气行程:活塞由上止点向下止点运动,汽缸内容积增大、压强减小,此时进气门打开、排气门关闭,外部新鲜空气在压力差作用下被吸入燃烧室","压缩行程:活塞由下止点向上止点运动,进气门和排气门均处于关闭状态,使燃烧室形成密封空间.随着汽缸内容积减小、压强增大,温度也不断升高,从而实现对燃烧室内空气的压缩","作功行程:活塞再次由上止点向下止点运动,进气门和排气门仍处于关闭状态.此时,喷油嘴将高压柴油喷入燃烧室并与空气混合,使柴油被压燃并对活塞作功","排气行程:活塞再次由下止点向上止点运动,汽缸内容积减小、压强增大,此时进气门关闭、排气门打开,燃烧后的废气在压力差作用下经由排气门排出","四冲程柴油机指曲轴旋转二周,其活塞经过四个行程完成一个工作循环的柴油机,下面对其工作过程叙述正确的是( )",1,{"answer":79,"createTime":5,"id":80,"options":81,"question":86,"source":30,"type":77},[],183032394,[82,83,84,85],"机体是气缸体、曲轴箱、机座、主轴承盖、及飞轮罩壳等固定零件的总称","气缸是燃烧室的组成部分,活塞在其间作往复运动","气缸盖:密封气缸,构成燃烧室.其上安装喷油器或火花塞、进排气门和布置进排气道以及冷却水通道","气缸垫:装在气缸盖和气缸体之间,其功用是保证气缸盖与气缸体接触面的密封,防止漏水、漏气","关于机体零件结构组成相关概念叙述正确的是( )",{"answer":88,"createTime":5,"id":89,"options":90,"question":96,"source":30,"type":77},[],183032395,[91,92,93,94,95],"输油泵功用:将柴油从油箱中吸出并适当增压以克服管路和滤清器的阻力,保证连续不断地向喷油泵输送足够的燃油","柴油滤清器功用:使柴油中的机械杂质和水分得到过滤,以保证输油泵 、喷油泵和喷油器的正常工作","喷油泵的功用:将经过滤清的柴油由低压变成高压,并按柴油机的工作要求,定时定量地将柴油输送到喷油器,喷入燃烧室","喷油器的功用:将喷油泵送来的高压油按一定压力(120~180MPa),以细雾状喷入燃烧室","调速器功用:根据柴油机负荷的变化而自动调节供油量,使柴油机在规定的转速范围内稳定运转","关于内燃机(柴油机)的燃油供给系统组成部件的功用叙述正确的是( )",{"answer":98,"createTime":5,"id":99,"options":100,"question":107,"source":30,"type":77},[],183032396,[101,102,103,104,105,106],"换气系统功用:按照内燃机的工作循环,准时地供给新鲜气量(空气或可燃混合气),及时并尽可能彻底地排除废气","空气滤清器的功用:清除流向气缸中的空气所含的灰尘杂质,以减少气缸、活塞和活塞环等零件的磨损","配气机构的功用:按照内燃机的工作过程,适时地开启和关闭进排气门,使内燃机能按时吸入新鲜气量和排除废气","进、排气管道的功用:将新鲜充量分别送到各个气缸,并排出废气","消音灭火器的功用:减少气缸中燃烧废气排出时的噪音、消除火花","减压机构的功用:在柴油机预热、启动、或进行技术保养时,使气门打开,以减小曲轴旋转的阻力矩","关于换气系统及其结构组成的功用叙述正确的是( )",{"answer":109,"createTime":5,"id":6,"options":110,"question":19,"source":30,"type":77},[],[8,9,10,11]]