真空制动系统制动管路图

真空制动系统制动管路图 international, Unicom international market, adapted future people on city of development needs, based Yu industry support, and traffic advantage, and Yangtze River culture, and ecological civilization, advantage, established city development target: radiation absorb Yangtze River upstream chuan Yunnan Guizhou of regional center, and international ecological landscape culture city. 2.3.2 economic development in Yibin city, goal 2020 GDP reached 300 billion yuan, the per capita GDP reached 58000 2030 regional GDP reached 800 billion yuan, the per capita GDP reached 138000. 2020 industrial structure adjustment in Yibin city as 9:56:35; 2030 industrial structure adjustment for the 6:47:47. Industrial output by 2020 of 510 billion yuan in 2030 and reach 1.2 trillion yuan. 2.4 of the urban population and land size 2.4.1 Yibin city, population size according to the different forecasting methods and the size of population environmental capacity check, the downtown main future population projections for the year are as follows: downtown main future population projections for the year (unit: million) forecast methods, 2020, 2030, balancing method for 130-150 table 2.4-1 170-190 ultra high speed development of relationship between economic and labour law development of 150 210 140 180 General develop 130 1.7 million people, resources and environment capacity check land population carrying capacity--280 water resources and population capacity-does not constitute a binding comprehensive prediction of ecological resources coupled--310 results of 140-180 in 2020, the actual resident population of about 1.4 million people; 2030 the actual resident population of about 1.8 million people. 2.4.2 the use of scale, Yibin city 2030 per capita index of urban construction land in the center of 100 square meters per person. Yibin city construction land standards and scale of table table 2.4-2 year population size (mass) land size (km2) land per capita ((km2/people) 2012 82.5 76.19 92.4 2020 140 140 100 2030 2030 Yibin 180 180 100 figure 2.4-1 figure 2.5 land-use planning layout of urban space in central 1、车轮制动器;2、制动主缸;3、双活塞安全缸;4、辅助缸 5、加力气室;6、控制阀;7、真空阀;8、单向阀;9、进气管 international, Unicom international market, adapted future people on city of development needs, based Yu industry support, and traffic advantage, and Yangtze River culture, and ecological civilization, advantage, established city development target: radiation absorb Yangtze River upstream chuan Yunnan Guizhou of regional center, and international ecological landscape culture city. 2.3.2 economic development in Yibin city, goal 2020 GDP reached 300 billion yuan, the per capita GDP reached 58000 2030 regional GDP reached 800 billion yuan, the per capita GDP reached 138000. 2020 industrial structure adjustment in Yibin city as 9:56:35; 2030 industrial structure adjustment for the 6:47:47. Industrial output by 2020 of 510 billion yuan in 2030 and reach 1.2 trillion yuan. 2.4 of the urban population and land size 2.4.1 Yibin city, population size according to the different forecasting methods and the size of population environmental capacity check, the downtown main future population projections for the year are as follows: downtown main future population projections for the year (unit: million) forecast methods, 2020, 2030, balancing method for 130-150 table 2.4-1 170-190 ultra high speed development of relationship between economic and labour law development of 150 210 140 180 General develop 130 1.7 million people, resources and environment capacity check land population carrying capacity--280 water resources and population capacity-does not constitute a binding comprehensive prediction of ecological resources coupled--310 results of 140-180 in 2020, the actual resident population of about 1.4 million people; 2030 the actual resident population of about 1.8 million people. 2.4.2 the use of scale, Yibin city 2030 per capita index of urban construction land in the center of 100 square meters per person. Yibin city construction land standards and scale of table table 2.4-2 year population size (mass) land size (km2) land per capita ((km2/people) 2012 82.5 76.19 92.4 2020 140 140 100 2030 2030 Yibin 180 180 100 figure 2.4-1 figure 2.5 land-use planning layout of urban space in central international, Unicom international market, adapted future people on city of development needs, based Yu industry support, and traffic advantage, and Yangtze River culture, and ecological civilization, advantage, established city development target: radiation absorb Yangtze River upstream chuan Yunnan Guizhou of regional center, and international ecological landscape culture city. 2.3.2 economic development in Yibin city, goal 2020 GDP reached 300 billion yuan, the per capita GDP reached 58000 2030 regional GDP reached 800 billion yuan, the per capita GDP reached 138000. 2020 industrial structure adjustment in Yibin city as 9:56:35; 2030 industrial structure adjustment for the 6:47:47. Industrial output by 2020 of 510 billion yuan in 2030 and reach 1.2 trillion yuan. 2.4 of the urban population and land size 2.4.1 Yibin city, population size according to the different forecasting methods and the size of population environmental capacity check, the downtown main future population projections for the year are as follows: downtown main future population projections for the year (unit: million) forecast methods, 2020, 2030, balancing method for 130-150 table 2.4-1 170-190 ultra high speed development of relationship between economic and labour law development of 150 210 140 180 General develop 130 1.7 million people, resources and environment capacity check land population carrying capacity--280 water resources and population capacity-does not constitute a binding comprehensive prediction of ecological resources coupled--310 results of 140-180 in 2020, the actual resident population of about 1.4 million people; 2030 the actual resident population of about 1.8 million people. 2.4.2 the use of scale, Yibin city 2030 per capita index of urban construction land in the center of 100 square meters per person. Yibin city construction land standards and scale of table table 2.4-2 year population size (mass) land size (km2) land per capita ((km2/people) 2012 82.5 76.19 92.4 2020 140 140 100 2030 2030 Yibin 180 180 100 figure 2.4-1 figure 2.5 land-use planning layout of urban space in central international, Unicom international market, adapted future people on city of development needs, based Yu industry support, and traffic advantage, and Yangtze River culture, and ecological civilization, advantage, established city development target: radiation absorb Yangtze River upstream chuan Yunnan Guizhou of regional center, and international ecological landscape culture city. 2.3.2 economic development in Yibin city, goal 2020 GDP reached 300 billion yuan, the per capita GDP reached 58000 2030 regional GDP reached 800 billion yuan, the per capita GDP reached 138000. 2020 industrial structure adjustment in Yibin city as 9:56:35; 2030 industrial structure adjustment for the 6:47:47. Industrial output by 2020 of 510 billion yuan in 2030 and reach 1.2 trillion yuan. 2.4 of the urban population and land size 2.4.1 Yibin city, population size according to the different forecasting methods and the size of population environmental capacity check, the downtown main future population projections for the year are as follows: downtown main future population projections for the year (unit: million) forecast methods, 2020, 2030, balancing method for 130-150 table 2.4-1 170-190 ultra high speed development of relationship between economic and labour law development of 150 210 140 180 General develop 130 1.7 million people, resources and environment capacity check land population carrying capacity--280 water resources and population capacity-does not constitute a binding comprehensive prediction of ecological resources coupled--310 results of 140-180 in 2020, the actual resident population of about 1.4 million people; 2030 the actual resident population of about 1.8 million people. 2.4.2 the use of scale, Yibin city 2030 per capita index of urban construction land in the center of 100 square meters per person. Yibin city construction land standards and scale of table table 2.4-2 year population size (mass) land size (km2) land per capita ((km2/people) 2012 82.5 76.19 92.4 2020 140 140 100 2030 2030 Yibin 180 180 100 figure 2.4-1 figure 2.5 land-use planning layout of urban space in central 液压管路和阀 一。液压管路由钢管和软管组成。用来在主缸和每个车轮制动器之间传送有压力的制动液。汽车上绝大部分制动管路用钢管，除了必须用软管的地方。底盘和前轮之间与底盘和后轮之间，柔性管是必须的。 用在制动系统内的液压管路是涂有防锈涂层的双壁焊接钢管。双壁的意思是管子由两根组成，一根在另一根的里面。钢管的接缝是焊接的。 二。阀。有计量阀，比例阀，载荷传感比例阀，组合阀。 1。计量阀，使的后鼓式制动器制动开始，前盘式制动器才工作。位于通向制动器的管路里中。由液压控制，是常闭的。踩下制动板后，制动液先流到后制动器，当液压力足够开启计量阀时，使液压力传到前盘式制动器。 2。比例阀，是前盘后鼓式车重要的零件，它装在到后鼓式制动器去的液压管路中。作用是维持前后制动器管路压力之间的正常比例。因此，提供平衡的车辆制动系统。前轮需要高压力时，比例阀减少后鼓式制动器的压力。强力制动时可以防止后轮抱死。 3。组合阀，就是把上面的几中阀集中在一起 international, Unicom international market, adapted future people on city of development needs, based Yu industry support, and traffic advantage, and Yangtze River culture, and ecological civilization, advantage, established city development target: radiation absorb Yangtze River upstream chuan Yunnan Guizhou of regional center, and international ecological landscape culture city. 2.3.2 economic development in Yibin city, goal 2020 GDP reached 300 billion yuan, the per capita GDP reached 58000 2030 regional GDP reached 800 billion yuan, the per capita GDP reached 138000. 2020 industrial structure adjustment in Yibin city as 9:56:35; 2030 industrial structure adjustment for the 6:47:47. Industrial output by 2020 of 510 billion yuan in 2030 and reach 1.2 trillion yuan. 2.4 of the urban population and land size 2.4.1 Yibin city, population size according to the different forecasting methods and the size of population environmental capacity check, the downtown main future population projections for the year are as follows: downtown main future population projections for the year (unit: million) forecast methods, 2020, 2030, balancing method for 130-150 table 2.4-1 170-190 ultra high speed development of relationship between economic and labour law development of 150 210 140 180 General develop 130 1.7 million people, resources and environment capacity check land population carrying capacity--280 water resources and population capacity-does not constitute a binding comprehensive prediction of ecological resources coupled--310 results of 140-180 in 2020, the actual resident population of about 1.4 million people; 2030 the actual resident population of about 1.8 million people. 2.4.2 the use of scale, Yibin city 2030 per capita index of urban construction land in the center of 100 square meters per person. Yibin city construction land standards and scale of table table 2.4-2 year population size (mass) land size (km2) land per capita ((km2/people) 2012 82.5 76.19 92.4 2020 140 140 100 2030 2030 Yibin 180 180 100 figure 2.4-1 figure 2.5 land-use planning layout of urban space in central 液压感载比例阀及其感载控制机构 1(螺塞 2.阀门 3.阀体 4.活塞 5.杠杆 6.感载拉力弹簧 7.摇臂 8.后悬架横向稳定杆 制动主缸 制动主缸安装在发动机室的隔板上，是一个有驾驶员通过踏板操作的液压泵。当踏板被踩下，主缸迫使有压力的制动液通过液压管路到四个车轮的每个制动器。 主缸的作用是将驾驶员踩在制动踏板上的压力传递到四个车轮的制动器以使汽车停车。力的转变是机械力变为液压力在转变成机械力。主缸利用的液体不可压缩原理和液压原理。(关于这两个原理要是不懂的话发贴告诉我，我在补发上去。) 主缸的构造，主要是有储液罐和主缸体两部分。储液罐是提供给主缸工作的制动液。现今所有的储液罐都是分体设计的，即两个独立的活塞有两个独立的储液区域。分体设计分别为前轮和后轮，或一个前轮和一个后轮的液压系统供液。一防一个液压失效后影响另一个液压系统。储液罐和主缸可以铸成一体。 international, Unicom international market, adapted future people on city of development needs, based Yu industry support, and traffic advantage, and Yangtze River culture, and ecological civilization, advantage, established city development target: radiation absorb Yangtze River upstream chuan Yunnan Guizhou of regional center, and international ecological landscape culture city. 2.3.2 economic development in Yibin city, goal 2020 GDP reached 300 billion yuan, the per capita GDP reached 58000 2030 regional GDP reached 800 billion yuan, the per capita GDP reached 138000. 2020 industrial structure adjustment in Yibin city as 9:56:35; 2030 industrial structure adjustment for the 6:47:47. Industrial output by 2020 of 510 billion yuan in 2030 and reach 1.2 trillion yuan. 2.4 of the urban population and land size 2.4.1 Yibin city, population size according to the different forecasting methods and the size of population environmental capacity check, the downtown main future population projections for the year are as follows: downtown main future population projections for the year (unit: million) forecast methods, 2020, 2030, balancing method for 130-150 table 2.4-1 170-190 ultra high speed development of relationship between economic and labour law development of 150 210 140 180 General develop 130 1.7 million people, resources and environment capacity check land population carrying capacity--280 water resources and population capacity-does not constitute a binding comprehensive prediction of ecological resources coupled--310 results of 140-180 in 2020, the actual resident population of about 1.4 million people; 2030 the actual resident population of about 1.8 million people. 2.4.2 the use of scale, Yibin city 2030 per capita index of urban construction land in the center of 100 square meters per person. Yibin city construction land standards and scale of table table 2.4-2 year population size (mass) land size (km2) land per capita ((km2/people) 2012 82.5 76.19 92.4 2020 140 140 100 2030 2030 Yibin 180 180 100 figure 2.4-1 figure 2.5 land-use planning layout of urban space in central 主缸的基本工作。 主缸有两个活塞总成。一个成为第一活塞，另一个成为第二活塞。两个活塞的工作基本是相同的。活塞组件有皮碗，回位弹簧和密封圈。 单活塞主缸是老式设计，几乎被淘汰了，现在都是双活塞主缸，就是具有两个独立的活塞主缸，为两个独立液压系统提供液压力。可以更安全，一个坏后不影响另一个的制动。 驾驶员踩制动板时，推杆向前推动主缸活塞。当活塞向前运动时，活塞推皮碗经过补液孔，补液孔立即被盖住，液体被封在皮碗的前面。压力液通过输出管路到车轮制动器，导致制动器制动。 驾驶员松开时，回位弹簧是活塞回到原来位置。来自储液罐的液体经过排液孔绕活塞皮碗周围流过。活塞前面过多的液体通过补液孔流回储液罐。 对角分路式液压系统用一条主缸回路连接到左前轮制动器和右后轮制动器。用另一条主缸回路连接到右前轮和左后轮制动器。可与主缸输出口直接相连或与阀在外部连接。优点是一个液压系统失效后另一个液压系统仍可制动一个前轮和一个后轮制动器来停车。 international, Unicom international market, adapted future people on city of development needs, based Yu industry support, and traffic advantage, and Yangtze River culture, and ecological civilization, advantage, established city development target: radiation absorb Yangtze River upstream chuan Yunnan Guizhou of regional center, and international ecological landscape culture city. 2.3.2 economic development in Yibin city, goal 2020 GDP reached 300 billion yuan, the per capita GDP reached 58000 2030 regional GDP reached 800 billion yuan, the per capita GDP reached 138000. 2020 industrial structure adjustment in Yibin city as 9:56:35; 2030 industrial structure adjustment for the 6:47:47. Industrial output by 2020 of 510 billion yuan in 2030 and reach 1.2 trillion yuan. 2.4 of the urban population and land size 2.4.1 Yibin city, population size according to the different forecasting methods and the size of population environmental capacity check, the downtown main future population projections for the year are as follows: downtown main future population projections for the year (unit: million) forecast methods, 2020, 2030, balancing method for 130-150 table 2.4-1 170-190 ultra high speed development of relationship between economic and labour law development of 150 210 140 180 General develop 130 1.7 million people, resources and environment capacity check land population carrying capacity--280 water resources and population capacity-does not constitute a binding comprehensive prediction of ecological resources coupled--310 results of 140-180 in 2020, the actual resident population of about 1.4 million people; 2030 the actual resident population of about 1.8 million people. 2.4.2 the use of scale, Yibin city 2030 per capita index of urban construction land in the center of 100 square meters per person. Yibin city construction land standards and scale of table table 2.4-2 year population size (mass) land size (km2) land per capita ((km2/people) 2012 82.5 76.19 92.4 2020 140 140 100 2030 2030 Yibin 180 180 100 figure 2.4-1 figure 2.5 land-use planning layout of urban space in central 助力器 助力器是安装在踏板和制动主缸之间。是为了减轻驾驶员用于制动的力。同时也为了使驾驶员有所谓的踏板感觉。有两种常用的形式，一种是利用进气岐管真空作用在膜片上的真空助力器;另一种是利用液压泵产生的力控制与主缸相连的液压助力器 一。真空助力器 真空助力器结构示于图,固定在驾驶室仪 表 关于同志近三年现实表现材料材料类招标技术评分表图表与交易pdf视力表打印pdf用图表说话 pdf 板下方的脚制动踏板前方,踏板推杆1与制动踏板杠杆联接.后端以螺栓与制动主缸相联接,真空助力器中心的推杆l2顶在制动主缸的第一活塞杆上.因此真空助力器在制动踏板与制动主缸之间起助力作用。 在真空助力器中,由膜片座6将气室分为加力气室前腔A和加力气室后腔B,前腔A经过管接头和进气管相通,制动时利用发动机进气管的真空度的吸力作用产生助力.膜片座的前端用橡胶反作用盘8与踏板推杆1相联,橡胶反作用盘的弹力与脚感压力相当,橡胶反作用盘的后部装有空气阀5,空气阀5的开度与橡胶反作用盘的弹力也就是脚踏板力相当,踏板力大,反作用力大,阀门开度大,真空加力作用大;反之,踏板力小,真空加力作用小。当发动机熄火或真空管路漏气时,真空助力器不起助力作用,踏板推杆通过空气阀5直接推动膜片座6和推杆12动作,直接作用在制动主缸的第一活塞杆上,产生制动作用,由于此时无助力,制动力*踏板压力产生。 当发动机工作,真空助力器起作用.制动时,踏下制动踏板,踏板推杆l和空气阀5向前推,压缩橡胶反作用盘,消除间隙,推动推杆12向前移,使制动主缸压力升高并传至各制动器,此时动作力由司机给出;同时,真空阀16和空气阀5起作用,空气进入B腔,推动膜片座6前移,产生助力作用,助力由进气管真空度和空气压力差决定;强力制动时,踏板力可直接作用international, Unicom international market, adapted future people on city of development needs, based Yu industry support, and traffic advantage, and Yangtze River culture, and ecological civilization, advantage, established city development target: radiation absorb Yangtze River upstream chuan Yunnan Guizhou of regional center, and international ecological landscape culture city. 2.3.2 economic development in Yibin city, goal 2020 GDP reached 300 billion yuan, the per capita GDP reached 58000 2030 regional GDP reached 800 billion yuan, the per capita GDP reached 138000. 2020 industrial structure adjustment in Yibin city as 9:56:35; 2030 industrial structure adjustment for the 6:47:47. Industrial output by 2020 of 510 billion yuan in 2030 and reach 1.2 trillion yuan. 2.4 of the urban population and land size 2.4.1 Yibin city, population size according to the different forecasting methods and the size of population environmental capacity check, the downtown main future population projections for the year are as follows: downtown main future population projections for the year (unit: million) forecast methods, 2020, 2030, balancing method for 130-150 table 2.4-1 170-190 ultra high speed development of relationship between economic and labour law development of 150 210 140 180 General develop 130 1.7 million people, resources and environment capacity check land population carrying capacity--280 water resources and population capacity-does not constitute a binding comprehensive prediction of ecological resources coupled--310 results of 140-180 in 2020, the actual resident population of about 1.4 million people; 2030 the actual resident population of about 1.8 million people. 2.4.2 the use of scale, Yibin city 2030 per capita index of urban construction land in the center of 100 square meters per person. Yibin city construction land standards and scale of table table 2.4-2 year population size (mass) land size (km2) land per capita ((km2/people) 2012 82.5 76.19 92.4 2020 140 140 100 2030 2030 Yibin 180 180 100 figure 2.4-1 figure 2.5 land-use planning layout of urban space in central 在踏板推杆并传至推杆上,真空助力与踏板力同时起作用,强力建立制动主缸压力,强力制动维持制动时,踏板可停留在踏下的某个位置,真空助力起作用,维持制动作用。 解除制动时,放松制动踏板,真空助力器恢复原始位置,等待下一次制动的到来 1-踏板推杆2-空气滤芯3-真空阀座4-真空通道5-空气阀6-膜片座7-密封垫8-橡胶反作用盘9-回位弹簧10-前加力室罩ll-密封垫12-推杆l3一后加力室罩l4-通气道l5-空气阀 座16-真空阀17-回位弹簧A-加力气室前腔B-加力气室后腔 international, Unicom international market, adapted future people on city of development needs, based Yu industry support, and traffic advantage, and Yangtze River culture, and ecological civilization, advantage, established city development target: radiation absorb Yangtze River upstream chuan Yunnan Guizhou of regional center, and international ecological landscape culture city. 2.3.2 economic development in Yibin city, goal 2020 GDP reached 300 billion yuan, the per capita GDP reached 58000 2030 regional GDP reached 800 billion yuan, the per capita GDP reached 138000. 2020 industrial structure adjustment in Yibin city as 9:56:35; 2030 industrial structure adjustment for the 6:47:47. Industrial output by 2020 of 510 billion yuan in 2030 and reach 1.2 trillion yuan. 2.4 of the urban population and land size 2.4.1 Yibin city, population size according to the different forecasting methods and the size of population environmental capacity check, the downtown main future population projections for the year are as follows: downtown main future population projections for the year (unit: million) forecast methods, 2020, 2030, balancing method for 130-150 table 2.4-1 170-190 ultra high speed development of relationship between economic and labour law development of 150 210 140 180 General develop 130 1.7 million people, resources and environment capacity check land population carrying capacity--280 water resources and population capacity-does not constitute a binding comprehensive prediction of ecological resources coupled--310 results of 140-180 in 2020, the actual resident population of about 1.4 million people; 2030 the actual resident population of about 1.8 million people. 2.4.2 the use of scale, Yibin city 2030 per capita index of urban construction land in the center of 100 square meters per person. Yibin city construction land standards and scale of table table 2.4-2 year population size (mass) land size (km2) land per capita ((km2/people) 2012 82.5 76.19 92.4 2020 140 140 100 2030 2030 Yibin 180 180 100 figure 2.4-1 figure 2.5 land-use planning layout of urban space in central 二 液压助力器 液压助力器是克服真空助力器真空不够的问 题 快递公司问题件快递公司问题件货款处理关于圆的周长面积重点题型关于解方程组的题及答案关于南海问题 开发的。位置和作用和真空助力器都是一样的。主要是动力源不同。有两种主 要液压系统，液压助力器由助力转向泵为助力器提供动力。“独立动力”是液压助力制动的整体形式助力器，具有独立的液压 泵。 液压助力系统采用滑阀，它控制流向助力室的压力液流。制动时，转向泵来的压力进到液压助力器，由滑阀导入。制动液流 到动力活塞后面，施加力给主缸输入杆做助推力。还有个储能器储存的能量在液压系统有毛病时足够几次制动使用。 international, Unicom international market, adapted future people on city of development needs, based Yu industry support, and traffic advantage, and Yangtze River culture, and ecological civilization, advantage, established city development target: radiation absorb Yangtze River upstream chuan Yunnan Guizhou of regional center, and international ecological landscape culture city. 2.3.2 economic development in Yibin city, goal 2020 GDP reached 300 billion yuan, the per capita GDP reached 58000 2030 regional GDP reached 800 billion yuan, the per capita GDP reached 138000. 2020 industrial structure adjustment in Yibin city as 9:56:35; 2030 industrial structure adjustment for the 6:47:47. Industrial output by 2020 of 510 billion yuan in 2030 and reach 1.2 trillion yuan. 2.4 of the urban population and land size 2.4.1 Yibin city, population size according to the different forecasting methods and the size of population environmental capacity check, the downtown main future population projections for the year are as follows: downtown main future population projections for the year (unit: million) forecast methods, 2020, 2030, balancing method for 130-150 table 2.4-1 170-190 ultra high speed development of relationship between economic and labour law development of 150 210 140 180 General develop 130 1.7 million people, resources and environment capacity check land population carrying capacity--280 water resources and population capacity-does not constitute a binding comprehensive prediction of ecological resources coupled--310 results of 140-180 in 2020, the actual resident population of about 1.4 million people; 2030 the actual resident population of about 1.8 million people. 2.4.2 the use of scale, Yibin city 2030 per capita index of urban construction land in the center of 100 square meters per person. Yibin city construction land standards and scale of table table 2.4-2 year population size (mass) land size (km2) land per capita ((km2/people) 2012 82.5 76.19 92.4 2020 140 140 100 2030 2030 Yibin 180 180 100 figure 2.4-1 figure 2.5 land-use planning layout of urban space in central international, Unicom international market, adapted future people on city of development needs, based Yu industry support, and traffic advantage, and Yangtze River culture, and ecological civilization, advantage, established city development target: radiation absorb Yangtze River upstream chuan Yunnan Guizhou of regional center, and international ecological landscape culture city. 2.3.2 economic development in Yibin city, goal 2020 GDP reached 300 billion yuan, the per capita GDP reached 58000 2030 regional GDP reached 800 billion yuan, the per capita GDP reached 138000. 2020 industrial structure adjustment in Yibin city as 9:56:35; 2030 industrial structure adjustment for the 6:47:47. Industrial output by 2020 of 510 billion yuan in 2030 and reach 1.2 trillion yuan. 2.4 of the urban population and land size 2.4.1 Yibin city, population size according to the different forecasting methods and the size of population environmental capacity check, the downtown main future population projections for the year are as follows: downtown main future population projections for the year (unit: million) forecast methods, 2020, 2030, balancing method for 130-150 table 2.4-1 170-190 ultra high speed development of relationship between economic and labour law development of 150 210 140 180 General develop 130 1.7 million people, resources and environment capacity check land population carrying capacity--280 water resources and population capacity-does not constitute a binding comprehensive prediction of ecological resources coupled--310 results of 140-180 in 2020, the actual resident population of about 1.4 million people; 2030 the actual resident population of about 1.8 million people. 2.4.2 the use of scale, Yibin city 2030 per capita index of urban construction land in the center of 100 square meters per person. Yibin city construction land standards and scale of table table 2.4-2 year population size (mass) land size (km2) land per capita ((km2/people) 2012 82.5 76.19 92.4 2020 140 140 100 2030 2030 Yibin 180 180 100 figure 2.4-1 figure 2.5 land-use planning layout of urban space in central