柴油机对重型牵引车加速性能影响的试验研究
李光辉1,2,祁同晖1,2,王兰1,2,王泽宇1,2
1.内燃机可靠性国家重点试验室，山东 潍坊 261061; 2.潍柴动力股份有限公司，山东 潍坊 261061
摘要：为提高重型牵引车动力性，在底盘测功机上对配置不同柴油机的整车进行加速性能测试，分析车辆加速过程中柴油机转速、功率对整车加速性能的影响。结果表明：整车高挡位超越加速，柴油机作用可分为柴油机负荷动力响应性阶段和外特性工作阶段，可有针对性地对柴油机进行标定优化；起步加速由不同挡位超越加速过程组成，整车在低挡位克服外界阻力时，由于传动速比大，需求转矩小，柴油机升速快，对柴油机动力性需求低；部分油门开度驾驶，柴油机性能过剩，油门特性对整车加速性和驾驶感受有重要影响。
关键词：柴油机;重型牵引车;动力性;加速性能
Experimental study on the
effect of diesel engine on the acceleration performance of heavy tractors
LI Guanghui1,2, QI
Tonghui1,2, WANG Lan1,2, WANG Zeyu1,2
1.State Key Laboratory of
Engine Reliability,Weifang 261061,China;2. Weichai Power Co.,Ltd., Weifang
261061,China
Abstract：In order to improve the power performance of heavy
tractor, the vehicle acceleration test with different diesel engines is carried
out on the chassis dynamometer to analyze the changes of diesel engine speed
and power during the vehicle acceleration process and clarify the impact of
diesel engines on the vehicle acceleration process. The results show that
surpass acceleration can be divided into the load dynamic response stage and
the external characteristic stage, and the diesel engine can be targeted for
calibration and optimization. The starting acceleration is composed of the
surpass acceleration process in different gears. When the vehicle overcomes the
external resistance in the low gear, due to the large transmission ratio, the
required torque is small, the speed of the diesel engine rises fast, the demand
for diesel power is low. When driving with part of the throttle open, the
diesel engine has excessive performance. At this time, the throttle
characteristics have an important impact on the vehicle acceleration
performance and driving experience.
Keywords:diesel engine;heavy tractor;power
performance; accelerate performance
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