CN101000000A - 摩托车发动机凸轮轴的凸轮 - Google Patents
摩托车发动机凸轮轴的凸轮 Download PDFInfo
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Abstract
本发明涉及一种摩托车发动机凸轮轴，其包括间隔设置的单缸进气凸轮和单缸排气凸轮，进气凸轮从a点到N点的上升段夹角为110°±1°，排气凸轮从X点到d点的下降段夹角为113°±1°，基圆半径为10.50mm。采用本发明的摩托车发动机，其增大了进气门开启提前角和排气门迟闭角，使进排气门有较大的重叠角，从而在排气冲程末段能充分利用新进冷空气的扫气效果对缸头、活塞等零件进行更好地冷却，从而降低了机体热负荷，提高发动机功率。
Description
技术领域
本发明涉及摩托车发动机领域，具体涉及一种可降低发动机热负荷和温度且可提高发动机功率的摩托车发动机凸轮轴的凸轮结构。
背景技术
摩托车发动机的工作循环是在高温下进行的，可燃混合气燃烧时的最高温度可达2000℃以上。高温燃气及运动件磨擦产生的摩擦热会使活塞、缸体、缸盖等部件温度上升。高温容易造成热变形，使发动机部件机械强度降低，使正常的配合间隙因热膨胀过大而改变。因此，摩托车发动机必须具备可靠的冷却系统，以保证发动机正常工作。摩托车发动机的正常带负荷工作温度不能过低和过高，因发动机温度过高将造成功率下降，加速无力，噪声大。甚至关掉点火开关发动机也不停机，同时发动机缸盖、缸体上油污会被烤焦冒烟，发动机出现润滑油渗漏现象。
发动机过热的危害性比较大，由于过热会造成发动机功率下降，加速无力，油耗增加；由于过热造成发动机不正常燃烧；由于过热造成润滑油变质焦化，运动件之间的油膜被破坏，机件磨损加剧；由于过热造成曲轴边杆大小头轴承咬死，活塞环断裂，拉缸、抱缸，缩短了发动机寿命，危及驾车人的行车安全。
如何减小发动机的过热，是行业人员长期研究的课题，人们长期以来着重从外部散热方式来冷却，如：增大散热片面积，改善冷却方式等，而较少从发动机换气过程本身去加以改善。发动机的配气机构在机体散热上可起到重要作用，我们可从配气机构上着手来改善机体的热负荷和温度。
现有技术中，在已公开的专利文献中，例如专利号为02275986.7的实用新型专利说明书中，揭示了一种摩托车发动机凸轮轴的凸轮结构，即将进气凸轮夹角与排气凸轮的夹角设定为105°～128°，基圆半径设置为22～24mm。
上述构造中，保证了配气相位和较好的气门运动规律，使发动机噪音明显降低，且减少发动机废气的排放。但是不能对发动机温度进行有效的降低。因此需要一种摩托车发动机凸轮轴的凸轮结构，可改善对发动机机体的冷却效果，且能达到提高发动机效率的目的。
发明内容
本发明所要解决的主要技术问题是，提供一种摩托车发动机凸轮轴，增大进气门开启提前角和排气门迟闭角，改善发动机的散热效果，降低机体热负荷，在油耗不增加的同时提高了发动机的功率。
本发明的技术问题可采用如下技术方案来解决，一种摩托车发动机凸轮轴，其包含间隔设置的单缸进气凸轮和排气凸轮，进气凸轮从a点到N点的上升段夹角为110°±1°，排气凸轮从X点到d点的下降段夹角为113°±1°，基圆半径为10.50mm。
原有凸轮的进气凸轮从a点到N点的上升段夹角为106°±1°，排气凸轮从X点到d点的下降段夹角为108°±1°，而本发明改变了这两个夹角的角度，即进气凸轮从a点到N点的上升段夹角调整为110°±1°，排气凸轮从X点到d点的下降段夹角调整为为113°±1°，从而经适当装配后，使配气相位改变为：进气门早开角为7.5度，进气门迟闭角为27度，排气门早开角25度，排气门迟闭角15度，见附表1。实验证明，利用本发明的凸轮轴，扫气效果得到了有效的提高，改善了对缸头、活塞等零件进行更好的冷却，从而降低机体热负荷。
附表1：新型凸轮与普通凸轮在气门升程1.05时的配气相位对比
| 项目 | 进气早开角(上止点前) | 进气迟闭角(下止点后) | 排气早开角(下止点前) | 排气迟闭角(上止点后) |
| 新型凸轮 | 7.5° | 27° | 25° | 15° |
| 普通凸轮 | -2° | 27° | 25° | 3° |
进一步，本发明中，所述凸轮轴的进气凸轮和排气凸轮型线可选用超高次方程并在试验中进行修正来确定，其基圆半径为10.5mm，进气凸轮与排气凸轮的夹角为102.9°～106.9°，该夹角最佳为104.9°。这样，本实用新型的凸轮轴的进气凸轮和排气凸轮型线进行修改后，使发动机在上述冷却效果得到提高了基础上，其油耗仍能保持不变，最大功率提高了0.13kw，最大扭矩提高0.2N.m，从而使采用本发明的摩托车发动机不但具有较低的机体热负荷，而且也有较佳的功率表现，见附表2。
附表2：新型凸轮与普通凸轮发动机性能对比
| 测量转速 | 普通凸轮 | 发明新型凸轮 | ||||||
| 功率kw | 扭矩N.m | 油耗g/kw.h | 火花塞垫片温度℃ | 功率kw | 扭矩N.m | 油耗g/kw.h | 火花塞垫片温度℃ | |
| 3000 | 2.16 | 6.86 | 410 | 209 | 2.24 | 7.09 | 426 | 194 |
| 3500 | 2.55 | 6.92 | 344 | 213 | 2.63 | 7.14 | 348 | 197 |
| 4000 | 3.01 | 7.15 | 338 | 221 | 3.12 | 7.45 | 378 | 205 |
| 4500 | 3.42 | 7.24 | 333 | 226 | 3.54 | 7.50 | 331 | 211 |
| 5000 | 3.83 | 7.29 | 339 | 231 | 3.85 | 7.34 | 343 | 217 |
| 5500 | 4.35 | 7.52 | 315 | 239 | 4.45 | 7.72 | 314 | 226 |
| 6000 | 4.63 | 7.34 | 319 | 241 | 4.78 | 7.56 | 319 | 230 |
| 6500 | 5.00 | 7.32 | 310 | 243 | 5.12 | 7.54 | 315 | 232 |
| 7000 | 5.18 | 7.05 | 311 | 243 | 5.35 | 7.29 | 318 | 231 |
| 7500 | 5.24 | 6.68 | 326 | 240 | 5.33 | 6.79 | 339 | 229 |
| 8000 | 5.19 | 6.19 | 340 | 238 | 5.37 | 6.39 | 352 | 226 |
| 8500 | 5.12 | 5.77 | 344 | 231 | 5.34 | 6.00 | 351 | 219 |
为让本实用新型之上述和其它目的、特征和优点能更明显易懂，下文特举较佳实施例，并配合附图，作详细说明如下。
附图说明
图1为本发明一较佳实施例凸轮轴结构简图；
图2为图1中进气凸轮沿A-A向剖视图；
图3为图1中排气凸轮沿B-B向剖视图；
图4为凸轮轴夹角示意图。
具体实施方式
如图1～3所示，本发明的凸轮轴包括间隔设置的进气凸轮1、排气凸轮2，该凸轮轴的进排气凸轮基圆半径均为10.50mm。进气凸轮1最大升程点为N点(桃尖)，最大升程5.566mm，沿顺时针方向，从a点到N点为上升段，夹角110°；从N点到b点为下降段，夹角87°。排气凸轮2最大升程点为X点(桃尖)，最大升程5.377mm，沿顺时针方向，从c点到X点为上升段，夹角90°；从X点到d点为下降段，夹角113°。进排气凸轮桃尖夹角为48.8°+56.1°＝104.9°。与普通凸轮相比较其最明显不同之处是：进气凸轮1在上升段的0°～85°范围内、排气凸轮2在下降段的115°～203°范围内的升程值与普通凸轮不同。进气凸轮1上升段夹角范围比普通凸轮宽4°，排气凸轮2下降段夹角范围比普通凸轮宽5°，改变了凸轮的配气相位，从而增大了进气门开启提前角和排气门迟闭角，使进排气门有较大的重叠角，从而在排气冲程末段能充分利用新进冷空气的扫气效果对缸头、活塞等零件进行更好的冷却，从而降低了机体热负荷，提高发动机功率。
在本发明中，进气凸轮的凸轮型线由下面的进气凸轮相位角和进气升程关系表确定；排气凸轮的凸轮型线由下面的排气凸轮相位角和排气升程关系表确定。
| 进气凸轮 | 排气凸轮 | ||||
| 角度 | 新型凸轮升程mm | 普通凸轮升程mm | 角度 | 新型凸轮升程mm | 普通凸轮升程mm |
| 0°(a点) | 0.000 | 0°(c点) | 0.000 | 0.000 | |
| 1° | 0.002 | 1° | 0.001 | 0.001 | |
| 2° | 0.005 | 2° | 0.003 | 0.003 | |
| 3° | 0.010 | 3° | 0.006 | 0.006 | |
| 4° | 0.017 | 0.000 | 4° | 0.011 | 0.011 |
| 5° | 0.023 | 0.001 | 5° | 0.017 | 0.017 |
| 6° | 0.030 | 0.003 | 6° | 0.022 | 0.022 |
| 7° | 0.036 | 0.006 | 7° | 0.028 | 0.028 |
| 8° | 0.042 | 0.011 | 8° | 0.034 | 0.034 |
| 9° | 0.048 | 0.017 | 9° | 0.039 | 0.039 |
| 10° | 0.054 | 0.024 | 10° | 0.044 | 0.044 |
| 11° | 0.060 | 0.030 | 11° | 0.049 | 0.049 |
| 12° | 0.065 | 0.036 | 12° | 0.054 | 0.054 |
| 13° | 0.071 | 0.042 | 13° | 0.059 | 0.059 |
| 14° | 0.076 | 0.048 | 14° | 0.064 | 0.064 |
| 15° | 0.082 | 0.053 | 15° | 0.069 | 0.069 |
| 16° | 0.087 | 0.059 | 16° | 0.074 | 0.074 |
| 17° | 0.092 | 0.064 | 17° | 0.079 | 0.079 |
| 18° | 0.098 | 0.069 | 18° | 0.084 | 0.084 |
| 19° | 0.103 | 0.074 | 19° | 0.089 | 0.089 |
| 20° | 0.108 | 0.079 | 20° | 0.094 | 0.094 |
| 21° | 0.112 | 0.085 | 21° | 0.099 | 0.099 |
| 22° | 0.117 | 0.090 | 22° | 0.104 | 0.104 |
| 23° | 0.122 | 0.095 | 23° | 0.110 | 0.110 |
| 24° | 0.127 | 0.100 | 24° | 0.115 | 0.115 |
| 25° | 0.131 | 0.105 | 25° | 0.120 | 0.120 |
| 26° | 0.136 | 0.110 | 26° | 0.125 | 0.125 |
| 27° | 0.141 | 0.115 | 27° | 0.130 | 0.130 |
| 28° | 0.146 | 0.121 | 28° | 0.135 | 0.135 |
| 29° | 0.151 | 0.126 | 29° | 0.140 | 0.140 |
| 30° | 0.156 | 0.131 | 30° | 0.145 | 0.145 |
| 31° | 0.162 | 0.136 | 31° | 0.150 | 0.150 |
| 32° | 0.171 | 0.141 | 32° | 0.158 | 0.158 |
| 33° | 0.181 | 0.146 | 33° | 0.168 | 0.168 |
| 34° | 0.196 | 0.151 | 34° | 0.184 | 0.184 |
| 35° | 0.214 | 0.156 | 35° | 0.205 | 0.205 |
| 36° | 0.238 | 0.162 | 36° | 0.233 | 0.233 |
| 37° | 0.267 | 0.169 | 37° | 0.267 | 0.267 |
| 38° | 0.301 | 0.178 | 38° | 0.308 | 0.308 |
| 39° | 0.342 | 0.192 | 39° | 0.357 | 0.357 |
| 40° | 0.389 | 0.210 | 40° | 0.413 | 0.413 |
| 41° | 0.443 | 0.233 | 41° | 0.477 | 0.477 |
| 42° | 0.503 | 0.262 | 42° | 0.548 | 0.548 |
| 43° | 0.570 | 0.298 | 43° | 0.628 | 0.628 |
| 44° | 0.644 | 0.340 | 44° | 0.715 | 0.715 |
| 45° | 0.724 | 0.388 | 45° | 0.811 | 0.811 |
| 46° | 0.810 | 0.442 | 46° | 0.916 | 0.916 |
| 47° | 0.901 | 0.503 | 47° | 1.029 | 1.029 |
| 48° | 0.996 | 0.571 | 48° | 1.151 | 1.151 |
| 49° | 1.095 | 0.644 | 49° | 1.282 | 1.282 |
| 50° | 1.196 | 0.724 | 50° | 1.422 | 1.422 |
| 51° | 1.299 | 0.810 | 51° | 1.570 | 1.570 |
| 52° | 1.403 | 0.902 | 52° | 1.727 | 1.727 |
| 53° | 1.508 | 0.999 | 53° | 1.892 | 1.892 |
| 54° | 1.613 | 1.101 | 54° | 2.062 | 2.062 |
| 55° | 1.718 | 1.208 | 55° | 2.235 | 2.235 |
| 56° | 1.823 | 1.319 | 56° | 2.411 | 2.411 |
| 57° | 1.926 | 1.433 | 57° | 2.584 | 2.584 |
| 58° | 2.029 | 1.549 | 58° | 2.754 | 2.754 |
| 59° | 2.131 | 1.665 | 59° | 2.920 | 2.920 |
| 60° | 2.231 | 1.782 | 60° | 3.082 | 3.082 |
| 61° | 2.330 | 1.899 | 61° | 3.240 | 3.240 |
| 62° | 2.428 | 2.016 | 62° | 3.392 | 3.392 |
| 63° | 2.524 | 2.132 | 63° | 3.539 | 3.539 |
| 64° | 2.618 | 2.247 | 64° | 3.681 | 3.681 |
| 65° | 2.711 | 2.362 | 65° | 3.817 | 3.817 |
| 66° | 2.803 | 2.475 | 66° | 3.948 | 3.948 |
| 67° | 2.893 | 2.588 | 67° | 4.073 | 4.073 |
| 68° | 2.982 | 2.699 | 68° | 4.192 | 4.192 |
| 69° | 3.070 | 2.810 | 69° | 4.306 | 4.306 |
| 70° | 3.157 | 2.919 | 70° | 4.414 | 4.413 |
| 71° | 3.242 | 3.028 | 71° | 4.515 | 4.515 |
| 72° | 3.327 | 3.135 | 72° | 4.611 | 4.611 |
| 73° | 3.411 | 3.241 | 73° | 4.701 | 4.701 |
| 74° | 3.495 | 3.345 | 74° | 4.784 | 4.784 |
| 75° | 3.578 | 3.448 | 75° | 4.862 | 4.862 |
| 76° | 3.661 | 3.549 | 76° | 4.934 | 4.934 |
| 77° | 3.743 | 3.649 | 77° | 5.000 | 5.001 |
| 78° | 3.825 | 3.748 | 78° | 5.061 | 5.061 |
| 79° | 3.907 | 3.844 | 79° | 5.116 | 5.116 |
| 80° | 3.989 | 3.939 | 80° | 5.165 | 5.165 |
| 81° | 4.071 | 4.033 | 81° | 5.208 | 5.208 |
| 82° | 4.152 | 4.124 | 82° | 5.247 | 5.247 |
| 83° | 4.233 | 4.214 | 83° | 5.280 | 5.280 |
| 84° | 4.314 | 4.301 | 84° | 5.308 | 5.308 |
| 85° | 4.394 | 4.386 | 85° | 5.331 | 5.331 |
| 86° | 4.473 | 4.469 | 86° | 5.349 | 5.349 |
| 87° | 4.551 | 4.549 | 87° | 5.363 | 5.363 |
| 88° | 4.628 | 4.627 | 88° | 5.372 | 5.372 |
| 89° | 4.703 | 4.703 | 89° | 5.376 | 5.376 |
| 90° | 4.776 | 4.776 | 90°(X点) | 5.377 | 5.378 |
| 91° | 4.847 | 4.847 | 91° | 5.373 | 5.374 |
| 92° | 4.914 | 4.915 | 92° | 5.366 | 5.367 |
| 93° | 4.979 | 4.980 | 93° | 5.354 | 5.355 |
| 94° | 5.042 | 5.042 | 94° | 5.339 | 5.340 |
| 95° | 5.101 | 5.102 | 95° | 5.320 | 5.320 |
| 96° | 5.157 | 5.158 | 96° | 5.297 | 5.297 |
| 97° | 5.209 | 5.212 | 97° | 5.271 | 5.271 |
| 98° | 5.259 | 5.262 | 98° | 5.241 | 5.241 |
| 99° | 5.305 | 5.308 | 99° | 5.208 | 5.208 |
| 100° | 5.348 | 5.351 | 100° | 5.171 | 5.172 |
| 101° | 5.387 | 5.390 | 101° | 5.132 | 5.132 |
| 102° | 5.423 | 5.425 | 102° | 5.090 | 5.090 |
| 103° | 5.455 | 5.457 | 103° | 5.044 | 5.044 |
| 104° | 5.483 | 5.484 | 104° | 4.995 | 4.995 |
| 105° | 5.507 | 5.508 | 105° | 4.943 | 4.943 |
| 106° | 5.527 | 5.528 | 106° | 4.888 | 4.888 |
| 107° | 5.543 | 5.543 | 107° | 4.830 | 4.830 |
| 108° | 5.555 | 5.555 | 108° | 4.770 | 4.770 |
| 109° | 5.563 | 5.562 | 109° | 4.707 | 4.707 |
| 110°(N点) | 5.566 | 5.564 | 110° | 4.641 | 4.641 |
| 111° | 5.564 | 5.563 | 111° | 4.573 | 4.573 |
| 112° | 5.558 | 5.556 | 112° | 4.502 | 4.502 |
| 113° | 5.547 | 5.545 | 113° | 4.431 | 4.429 |
| 114° | 5.530 | 5.529 | 114° | 4.357 | 4.354 |
| 115° | 5.508 | 5.508 | 115° | 4.283 | 4.277 |
| 116° | 5.481 | 5.480 | 116° | 4.207 | 4.198 |
| 117° | 5.448 | 5.448 | 117° | 4.130 | 4.117 |
| 118° | 5.409 | 5.409 | 118° | 4.053 | 4.034 |
| 119° | 5.364 | 5.364 | 119° | 3.975 | 3.950 |
| 120° | 5.312 | 5.312 | 120° | 3.896 | 3.863 |
| 121° | 5.253 | 5.253 | 121° | 3.817 | 3.775 |
| 122° | 5.188 | 5.188 | 122° | 3.737 | 3.685 |
| 123° | 5.115 | 5.115 | 123° | 3.657 | 3.594 |
| 124° | 5.035 | 5.035 | 124° | 3.576 | 3.502 |
| 125° | 4.948 | 4.948 | 125° | 3.495 | 3.407 |
| 126° | 4.853 | 4.853 | 126° | 3.413 | 3.312 |
| 127° | 4.751 | 4.751 | 127° | 3.331 | 3.216 |
| 128° | 4.642 | 4.642 | 128° | 3.249 | 3.118 |
| 129° | 4.526 | 4.526 | 129° | 3.166 | 3.019 |
| 130° | 4.403 | 4.403 | 130° | 3.082 | 2.919 |
| 131° | 4.273 | 4.273 | 131° | 2.998 | 2.817 |
| 132° | 4.136 | 4.136 | 132° | 2.914 | 2.715 |
| 133° | 3.993 | 3.993 | 133° | 2.828 | 2.611 |
| 134° | 3.843 | 3.843 | 134° | 2.742 | 2.507 |
| 135° | 3.688 | 3.688 | 135° | 2.656 | 2.401 |
| 136° | 3.526 | 3.526 | 136° | 2.568 | 2.295 |
| 137° | 3.359 | 3.359 | 137° | 2.480 | 2.188 |
| 138° | 3.188 | 3.188 | 138° | 2.391 | 2.080 |
| 139° | 3.012 | 3.012 | 139° | 2.301 | 1.972 |
| 140° | 2.832 | 2.832 | 140° | 2.211 | 1.863 |
| 141° | 2.650 | 2.650 | 141° | 2.120 | 1.755 |
| 142° | 2.466 | 2.466 | 142° | 2.028 | 1.647 |
| 143° | 2.284 | 2.284 | 143° | 1.936 | 1.539 |
| 144° | 2.105 | 2.105 | 144° | 1.843 | 1.433 |
| 145° | 1.934 | 1.934 | 145° | 1.750 | 1.328 |
| 146° | 1.770 | 1.770 | 146° | 1.657 | 1.226 |
| 147° | 1.616 | 1.616 | 147° | 1.564 | 1.126 |
| 148° | 1.471 | 1.471 | 148° | 1.471 | 1.031 |
| 149° | 1.334 | 1.334 | 149° | 1.379 | 0.939 |
| 150° | 1.207 | 1.207 | 150° | 1.287 | 0.853 |
| 151° | 1.088 | 1.088 | 151° | 1.196 | 0.771 |
| 152° | 0.978 | 0.978 | 152° | 1.107 | 0.694 |
| 153° | 0.876 | 0.876 | 153° | 1.019 | 0.621 |
| 154° | 0.783 | 0.783 | 154° | 0.933 | 0.554 |
| 155° | 0.698 | 0.698 | 155° | 0.850 | 0.492 |
| 156° | 0.621 | 0.621 | 156° | 0.770 | 0.436 |
| 157° | 0.551 | 0.551 | 157° | 0.694 | 0.385 |
| 158° | 0.489 | 0.489 | 158° | 0.621 | 0.340 |
| 159° | 0.435 | 0.435 | 159° | 0.554 | 0.300 |
| 160° | 0.388 | 0.388 | 160° | 0.492 | 0.265 |
| 161° | 0.349 | 0.349 | 161° | 0.436 | 0.236 |
| 162° | 0.316 | 0.316 | 162° | 0.385 | 0.212 |
| 163° | 0.291 | 0.291 | 163° | 0.341 | 0.193 |
| 164° | 0.272 | 0.272 | 164° | 0.302 | 0.178 |
| 165° | 0.258 | 0.258 | 165° | 0.269 | 0.168 |
| 166° | 0.247 | 0.247 | 166° | 0.241 | 0.160 |
| 167° | 0.238 | 0.238 | 167° | 0.218 | 0.154 |
| 168° | 0.230 | 0.230 | 168° | 0.199 | 0.148 |
| 169° | 0.221 | 0.221 | 169° | 0.184 | 0.143 |
| 170° | 0.213 | 0.213 | 170° | 0.172 | 0.138 |
| 171° | 0.204 | 0.204 | 171° | 0.162 | 0.133 |
| 172° | 0.196 | 0.196 | 172° | 0.155 | 0.128 |
| 173° | 0.188 | 0.188 | 173° | 0.148 | 0.122 |
| 174° | 0.179 | 0.179 | 174° | 0.143 | 0.117 |
| 175° | 0.171 | 0.171 | 175° | 0.138 | 0.112 |
| 176° | 0.163 | 0.163 | 176° | 0.133 | 0.106 |
| 177° | 0.154 | 0.154 | 177° | 0.128 | 0.101 |
| 178° | 0.146 | 0.146 | 178° | 0.123 | 0.096 |
| 179° | 0.137 | 0.137 | 179° | 0.117 | 0.090 |
| 180° | 0.129 | 0.129 | 180° | 0.112 | 0.085 |
| 181° | 0.121 | 0.121 | 181° | 0.107 | 0.080 |
| 182° | 0.113 | 0.113 | 182° | 0.101 | 0.075 |
| 183° | 0.104 | 0.104 | 183° | 0.096 | 0.069 |
| 184° | 0.096 | 0.096 | 184° | 0.090 | 0.064 |
| 185° | 0.087 | 0.087 | 185° | 0.085 | 0.059 |
| 186° | 0.079 | 0.079 | 186° | 0.080 | 0.054 |
| 187° | 0.070 | 0.070 | 187° | 0.074 | 0.049 |
| 188° | 0.061 | 0.061 | 188° | 0.069 | 0.044 |
| 189° | 0.052 | 0.052 | 189° | 0.064 | 0.039 |
| 190° | 0.043 | 0.043 | 190° | 0.059 | 0.033 |
| 191° | 0.034 | 0.034 | 191° | 0.054 | 0.028 |
| 192° | 0.025 | 0.025 | 192° | 0.048 | 0.023 |
| 193° | 0.016 | 0.016 | 193° | 0.043 | 0.017 |
| 194° | 0.007 | 0.007 | 194° | 0.038 | 0.012 |
| 195° | 0.003 | 0.003 | 195° | 0.033 | 0.007 |
| 196° | 0.001 | 0.001 | 196° | 0.028 | 0.003 |
| 197°(b点) | 0.000 | 0.000 | 197° | 0.023 | 0.001 |
| 198° | 0.018 | 0.000 |
| 199° | 0.012 | |
| 200° | 0.008 | |
| 201° | 0.004 | |
| 202° | 0.001 | |
| 203°(d点) | 0.000 |
其中，上述凸轮型线的基圆半径为10.5mm，进气凸轮与排气凸轮的夹角为102.9°～106.9°，上述升程允许的偏差范围：升程0～0.1mm时偏差为±0.015mm，升程0.1～0.5mm时偏差为±0.05mm，升程大于0.5mm时偏差为±0.06mm。
如图4所示，作为一个优选的实施方式，本发明的凸轮轴中，进气凸轮与排气凸轮之间的夹角最佳为104.9°。
根据相关数学知识，极坐标是可以根据需要任意旋转后，再重新确定起始幅角(0°角)的，因此，具体实施方式中各幅角对应的弦长可以用依次旋转的方式改变。这种改变后的凸轮包括在本发明的权利范围内。
机械加工产品尺寸都有偏差，在升程值公差内的凸轮也包括在本发明的权利范围内。
虽然本发明已以较佳实施例披露如上，然其并非用以限定本发明，任何所属技术领域的技术人员，在不脱离本发明的精神和范围内，当可作些许之更动与改进，因此本发明的保护范围当视权利要求所界定者为准。
Claims (3)
1.一种摩托车发动机的凸轮，其包含间隔设置的单缸进气凸轮和排气凸轮，其特征在于进气凸轮从a点到N点的上升段夹角为110°±1°，排气凸轮从X点到d点的下降段夹角为113°±1°，基圆半径为10.50mm。
2.根据权利要求1所述的摩托车发动机的凸轮，其特征在于，所述进气凸轮的凸轮型线由下述的进气凸轮相位角和进气升程关系确定：0°(a点)的升程为0.000
1°的升程为0.002 2°的升程为0.005 3°的升程为0.010
4°的升程为0.017 5°的升程为0.023 6°的升程为0.030
7°的升程为0.036 8°的升程为0.042 9°的升程为0.048
10°的升程为0.054 11°的升程为0.060 12°的升程为0.065
13°的升程为0.071 14°的升程为0.076 15°的升程为0.082
16°的升程为0.087 17°的升程为0.092 18°的升程为0.098
19°的升程为0.103 20°的升程为0.108 21°的升程为0.112
22°的升程为0.117 23°的升程为0.122 24°的升程为0.127
25°的升程为0.131 26°的升程为0.136 27°的升程为0.141
28°的升程为0.146 29°的升程为0.151 30°的升程为0.156
31°的升程为0.162 32°的升程为0.171 33°的升程为0.181
34°的升程为0.196 35°的升程为0.214 36°的升程为0.238
37°的升程为0.267 38°的升程为0.301 39°的升程为0.342
40°的升程为0.389 41°的升程为0.443 42°的升程为0.503
43°的升程为0.570 44°的升程为0.644 45°的升程为0.724
46°的升程为0.810 47°的升程为0.901 48°的升程为0.996
49°的升程为1.095 50°的升程为1.196 51°的升程为1.299
52°的升程为1.403 53°的升程为1.508 54°的升程为1.613
55°的升程为1.718 56°的升程为1.823 57°的升程为1.926
58°的升程为2.029 59°的升程为2.131 60°的升程为2.231
61°的升程为2.330 62°的升程为2.428 63°的升程为2.524
64°的升程为2.618 65°的升程为2.711 66°的升程为2.803
67°的升程为2.893 68°的升程为2.982 69°的升程为3.070
70°的升程为3.157 71°的升程为3.242 72°的升程为3.327
73°的升程为3.411 74°的升程为3.495 75°的升程为3.578
76°的升程为3.661 77°的升程为3.743 78°的升程为3.825
79°的升程为3.907 80°的升程为3.989 81°的升程为4.071
82°的升程为4.152 83°的升程为4.233 84°的升程为4.314
85°的升程为4.394 86°的升程为4.473 87°的升程为4.551
88°的升程为4.628 89°的升程为4.703 90°的升程为4.776
91°的升程为4.847 92°的升程为4.914 93°的升程为4.979
94°的升程为5.042 95°的升程为5.101 96°的升程为5.157
97°的升程为5.209 98°的升程为5.259 99°的升程为5.305
100°的升程为5.348 101°的升程为5.387 102°的升程为5.423
103°的升程为5.455 104°的升程为5.483 105°的升程为5.507
106°的升程为5.527 107°的升程为5.543 108°的升程为5.555
109°的升程为5.563 110°(N点)的升程5.566 111°的升程为5.564
112°的升程为5.558 113°的升程为5.547 114°的升程为5.530
115°的升程为5.508 116°的升程为5.481 117°的升程为5.448
118°的升程为5.409 119°的升程为5.364 120°的升程为5.312
121°的升程为5.253 122°的升程为5.188 123°的升程为5.115
124°的升程为5.035 125°的升程为4.948 126°的升程为4.853
127°的升程为4.751 128°的升程为4.642 129°的升程为4.526
130°的升程为4.403 131°的升程为4.273 132°的升程为4.136
133°的升程为3.993 134°的升程为3.843 135°的升程为3.688
136°的升程为3.526 137°的升程为3.359 138°的升程为3.188
139°的升程为3.012 140°的升程为2.832 141°的升程为2.650
142°的升程为2.466 143°的升程为2.284 144°的升程为2.105
145°的升程为1.934 146°的升程为1.770 147°的升程为1.616
148°的升程为1.471 149°的升程为1.334 150°的升程为1.207
151°的升程为1.088 152°的升程为0.978 153°的升程为0.876
154°的升程为0.783 155°的升程为0.698 156°的升程为0.621
157°的升程为0.551 158°的升程为0.489 159°的升程为0.435
160°的升程为0.388 161°的升程为0.349 162°的升程为0.316
163°的升程为0.291 164°的升程为0.272 165°的升程为0.258
166°的升程为0.247 167°的升程为0.238 168°的升程为0.230
169°的升程为0.221 170°的升程为0.213 171°的升程为0.204
172°的升程为0.196 173°的升程为0.188 174°的升程为0.179
175°的升程为0.171 176°的升程为0.163 177°的升程为0.154
178°的升程为0.146 179°的升程为0.137 180°的升程为0.129
181°的升程为0.121 182°的升程为0.113 183°的升程为0.104
184°的升程为0.096 185°的升程为0.087 186°的升程为0.079
187°的升程为0.070 188°的升程为0.061 189°的升程为0.052
190°的升程为0.043 191°的升程为0.034 192°的升程为0.025
193°的升程为0.016 194°的升程为0.007 195°的升程为0.003
196°的升程为的升程为0.001 197°(b点)的升程为0.000(以上升程单位均为mm)
该凸轮轴中的排气凸轮型线由下述排气凸轮相位角和排气升程关系确定：
0°(c点)的升程为0.000
1°的升程为0.001 2°的升程为0.003 3°的升程为0.006
4°的升程为0.011 5°的升程为0.017 6°的升程为0.022
7°的升程为0.028 8°的升程为0.034 9°的升程为0.039
10°的升程为0.044 11°的升程为0.049 12°的升程为0.054
13°的升程为0.059 14°的升程为0.064 15°的升程为0.069
16°的升程为0.074 17°的升程为0.079 18°的升程为0.084
19°的升程为0.089 20°的升程为0.094 21°的升程为0.099
22°的升程为0.104 23°的升程为0.110 24°的升程为0.115
25°的升程为0.120 26°的升程为0.125 27°的升程为0.130
28°的升程为0.135 29°的升程为0.140 30°的升程为0.145
31°的升程为0.150 32°的升程为0.158 33°的升程为0.168
34°的升程为0.184 35°的升程为0.205 36°的升程为0.233
37°的升程为0.267 38°的升程为0.308 39°的升程为0.357
40°的升程为0.413 41°的升程为0.477 42°的升程为0.548
43°的升程为0.628 44°的升程为0.715 45°的升程为0.811
46°的升程为0.916 47°的升程为1.029 48°的升程为1.151
49°的升程为1.282 50°的升程为1.422 51°的升程为1.570
52°的升程为1.727 53°的升程为1.892 54°的升程为2.062
55°的升程为2.235 56°的升程为2.411 57°的升程为2.584
58°的升程为2.754 59°的升程为2.920 60°的升程为3.082
61°的升程为3.240 62°的升程为3.392 63°的升程为3.539
64°的升程为3.681 65°的升程为3.817 66°的升程为3.948
67°的升程为4.073 68°的升程为4.192 69°的升程为4.306
70°的升程为4.414 71°的升程为4.515 72°的升程为4.611
73°的升程为4.701 74°的升程为4.784 75°的升程为4.862
76°的升程为4.934 77°的升程为5.000 78°的升程为5.061
79°的升程为5.116 80°的升程为5.165 81°的升程为5.208
82°的升程为5.247 83°的升程为5.280 84°的升程为5.308
85°的升程为5.331 86°的升程为5.349 87°的升程为5.363
88°的升程为5.372 89°的升程为5.376 90°(X点)的升程为5.377
91°的升程为5.373 92°的升程为5.366 93°的升程为5.354
94°的升程为5.339 95°的升程为5.320 96°的升程为5.297
97°的升程为5.271 98°的升程为5.241 99°的升程为5.208
100°的升程为5.171 101°的升程为5.132 102°的升程为5.090
103°的升程为5.044 104°的升程为4.995 105°的升程为4.943
106°的升程为4.888 107°的升程为4.830 108°的升程为4.770
109°的升程为4.707 110°的升程为4.641 111°的升程为4.573
112°的升程为4.502 113°的升程为4.431 114°的升程为4.357
115°的升程为4.283 116°的升程为4.207 117°的升程为4.130
118°的升程为4.053 119°的升程为3.975 120°的升程为3.896
121°的升程为3.817 122°的升程为3.737 123°的升程为3.657
124°的升程为3.576 125°的升程为3.495 126°的升程为3.413
127°的升程为3.331 128°的升程为3.249 129°的升程为3.166
130°的升程为3.082 131°的升程为2.998 132°的升程为2.914
133°的升程为2.828 134°的升程为2.742 135°的升程为2.656
136°的升程为2.568 137°的升程为2.480 138°的升程为2.391
139°的升程为2.301 140°的升程为2.211 141°的升程为2.120
142°的升程为2.028 143°的升程为1.936 144°的升程为1.843
145°的升程为1.750 146°的升程为1.657 147°的升程为1.564
148°的升程为1.471 149°的升程为1.379 150°的升程为1.287
151°的升程为1.196 152°的升程为1.107 153°的升程为1.019
154°的升程为0.933 155°的升程为0.850 156°的升程为0.770
157°的升程为0.694 158°的升程为0.621 159°的升程为0.554
160°的升程为0.492 161°的升程为0.436 162°的升程为0.385
163°的升程为0.341 164°的升程为0.302 165°的升程为0.269
166°的升程为0.241 167°的升程为0.218 168°的升程为0.199
169°的升程为0.184 170°的升程为0.172 171°的升程为0.162
172°的升程为0.155 173°的升程为0.148 174°的升程为0.143
175°的升程为0.138 176°的升程为0.133 177°的升程为0.128
178°的升程为0.123 179°的升程为0.117 180°的升程为0.112
181°的升程为0.107 182°的升程为0.101 183°的升程为0.096
184°的升程为0.090 185°的升程为0.085 186°的升程为0.080
187°的升程为0.074 188°的升程为0.069 189°的升程为0.064
190°的升程为0.059 191°的升程为0.054 192°的升程为0.048
193°的升程为0.043 194°的升程为0.038 195°的升程为0.033
196°的升程为0.028 197°的升程为0.023 198°的升程为0.018
199°的升程为0.012 200°的升程为0.008 201°的升程为0.004
202°的升程为0.001 203°(d点)的升程为0.000(以上升程单位均为mm)
上述升程允许的偏差范围：升程0～0.1mm时偏差为±0.015mm，升程0.1～0.5mm时偏差为±0.05mm，升程大于0.5mm时偏差为±0.06mm。
3.根据权利要求2所述的摩托车发动机的凸轮，其特征在于，所述进气凸轮和排气凸轮之间的夹角为104.9°。
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| CN103195531A (zh) * | 2013-04-12 | 2013-07-10 | 东莞市振博节能环保科技有限公司 | 一种发动机凸轮轴及有该发动机凸轮轴的发动机工作方法 |
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| CN2557699Y (zh) * | 2002-08-03 | 2003-06-25 | 重庆力帆实业（集团）有限公司 | 摩托车发动机凸轮轴 |
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| CN101782023B (zh) * | 2008-11-26 | 2013-03-27 | 通用汽车环球科技运作公司 | 带扫气的扭矩控制系统 |
| CN102425465A (zh) * | 2011-12-19 | 2012-04-25 | 力帆实业(集团)股份有限公司 | 小排量摩托车三气门发动机凸轮轴 |
| CN102425465B (zh) * | 2011-12-19 | 2013-06-12 | 力帆实业(集团)股份有限公司 | 小排量摩托车三气门发动机凸轮轴 |
| CN103195531A (zh) * | 2013-04-12 | 2013-07-10 | 东莞市振博节能环保科技有限公司 | 一种发动机凸轮轴及有该发动机凸轮轴的发动机工作方法 |
| CN103758596A (zh) * | 2014-01-27 | 2014-04-30 | 安徽江淮汽车股份有限公司 | 一种发动机凸轮轴 |
| CN104832286A (zh) * | 2015-05-23 | 2015-08-12 | 于德付 | 高效节能内燃机主件结构 |
| CN105240082A (zh) * | 2015-10-31 | 2016-01-13 | 中国嘉陵工业股份有限公司（集团） | 一种摩托车发动机 |
| CN105257355A (zh) * | 2015-10-31 | 2016-01-20 | 中国嘉陵工业股份有限公司（集团） | 一种摩托车发动机的进、排气凸轮结构 |
| CN106401680A (zh) * | 2016-06-27 | 2017-02-15 | 力帆实业(集团)股份有限公司 | 摩托车发动机高性能凸轮轴 |
| CN106401680B (zh) * | 2016-06-27 | 2019-03-29 | 力帆实业(集团)股份有限公司 | 摩托车发动机高性能凸轮轴 |
| CN109339892A (zh) * | 2018-11-28 | 2019-02-15 | 无锡凯奥动力机械有限公司 | 单缸风冷柴油机凸轮轴 |
| CN109736914A (zh) * | 2018-12-11 | 2019-05-10 | 江苏三能动力总成有限公司 | 一种发动机凸轮轴系统 |
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