Automotive jitter five symptoms cause analysis solutions - TAIZHOU ENHONG MACHINERY MANUFACTURING CO., LTD.plastic parts,rubber parts,ball joint,forging parts,stamping parts

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汽车抖动五大症状原因分析 解决方案据恩鸿ball joint 了解
症状一：汽车高速行驶时振摆：汽车在高速行驶或在某一较高车速行驶时出现行驶不稳、摆头，甚至方向盘抖动。

原因： 一、前轮定位角失准，前束过大；

二、前轮胎气压过高过低或轮胎由于修补等原因引起动不平衡；

三、前轮毂变形或轮胎螺栓数量不等；

四、传动系统零部件安装松动；

五、传动轴弯曲，动不平衡；前轴变形；

六、减震器失效，前钢板弹簧刚度不一致；车架变形、铆钉松动或前轴变形。

据恩鸿ball joint 悉 诊断与排除：

一、高速振摆有两种情况，一是随着车速的提高振摆渐强烈；二是在某一较高车速出现振摆，并引起方向盘抖动时，先架起驱动桥，前轮加塞安全塞块，起动发动机并逐步换人高速档，使驱动轮达到终试摆振速度。若此时车身和方向盘都出现抖，则为传动系统引起的振摆，因为此时前轮前桥处于静止状态；若达到终试振摆速度，汽车不出现抖动，则振摆的原因系汽车前桥部分存在故障；

二、检查前轮各定位角和前束是否符合要求，如失准应调整；

三、架起前桥试转车轮，检查车轮静平衡情况及轮胎是否变形过大。必要时可换良好的车轮进行对比试验；

四、检查前轴、车架是否变形，检查传动轴是否弯曲，有条件时应做传动轴动平衡；

五、检查前钢板弹簧的刚度、减振器的效能以及弹簧支架铆钉有无松动等，性能不符合应更换。

六、检查底盘是否松旷，球头是否老化

症状二：起步抖：

解决方案：一般是压盘膜片软，或者盘不平，应该更换离合压盘。

症状三：行使时加速抖，或怠速抖动

解决方案：行使时加速就抖,有可能是内球笼坏了；如果是怠速正常的情况下抖或者怠速不平稳,那可能是节气门脏了，该清洗了。注意光洗节气门不行,节气门怠速阀一定要拆开清洗,怠速阀轴承要加油润滑才行。洗后应调整节气门，一般把怠速螺栓调整到底就可以，否则怠速偏高。

症状四：驾驶室里面抖的厉害，尤其是慢慢加油的时候，连着工作台，方向盘一起共振的一塌糊涂。

解决方案：元宝梁胶皮垫没弹性了。先把右侧的那个架子上有三条螺丝松开。然后用千斤把发动机支起来，越高越好。再把这三条螺丝紧固，放下千斤就行了。

症状五：冷启动时车辆抖动。

其主要原因是燃料燃烧不好，给车辆提供的动力不足。

一．点火能量偏低：车辆冷启动时如果发动机内的温度低，燃油和润滑油的温度较低，要多喷油以满足动力性的要求。长时间使用后，火花塞的极点间隙容易变大，导致点火能量下降，燃油雾化不好，从而使车辆发生抖动。另外，点火线圈老化、火花塞的高压线老化或者漏电，同样可以导致点火能量降低。

二．混合比不合适：在闭环控制的车辆中，氧传感器的最低工作温度是370摄氏度，如果刚启动车辆，排气管中的温度达不到370摄氏度，氧传感器就会不工作。此时ECU判断失误，其通过执行机构对油气混合、点火时间的控制出现误差，从而减小了车辆的动力输出，出现抖动现象。

三．气门和进气道积碳：如果发动机内的气门和进气道发生积碳，而积碳可以吸收适量的燃油，ECU判断出现错误，同样达不到需要的动力性，抖动现象就在所难免了。

四．各缸工况不同：在长时间使用后，各缸火花塞的点火间隙和时间控制会出现差异，但是ECU诊断不出这种偏差，依旧对“它们”平等相待，这就出现了实际与理论的差错，结果有的缸产生的功率偏小，会导致抖动。

五．水温传感器失灵：水温传感器是电脑判断当时发动机工况的重要依据之一。水温传感器失灵会导致电脑控制的喷油量出现偏差，造成车辆抖动。

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Automotive jitter five major symptoms of reason analysis solutions, according to Well Hung ball joint understanding
Runout symptoms: high-speed vehicle: car driving instability at high speeds or when traveling at a higher speed, swing, and even the steering wheel shake.

Reasons: First, the front wheel alignment angle misalignment before the beam is too large;

Second, the front tire pressure is too high, too low, or tire repair and other reasons caused by the dynamic imbalance;

Third, the front wheel hub deformation or tire bolt varying amounts;

, Powertrain components installed loose;

Drive shaft bending, dynamic imbalance; front axle deformation;

, Shock absorber failure, inconsistent stiffness of front leaf springs; frame deformation rivets loose or deformed front axle.

According to learned Well Hung ball joint diagnosis and exclude:

, High-speed runout both cases, increased speed runout getting strong; runout, and cause the steering wheel shake when you first set up the drive axle appears at a higher speed, front-wheel stopper security Cypriot block, start the engine and the gradual substitution of high-speed file, so that the drive wheels to achieve the final examination shimmy speed. When the body and the steering wheel shaking, as compared to the transmission system caused by the runout, because the front axle in a quiescent state in; reached the final examination runout speed, the car does not appear to jitter, runout in cars The front axle part there is a failure;

Check the front wheel positioning angle and toe meets the requirements, such as misalignment should be adjusted;

Third, set up a try turn the wheels of the front axle, to check wheel static balance and tire deformation is too large. If necessary, replace it with a good wheel comparison test;

Check the front axle, the frame is not deformed, check the drive shaft is bent, conditional should do the drive shaft dynamic balance;

, Check the front leaf spring stiffness, whether the performance as well as spring damper bracket rivets loosening, does not meet the performance should be replaced.

, Check whether the chassis Songkuang ball head whether aging

Symptoms: start shaking:

Solution: generally soft diaphragm, pressure plate or disk uneven, you should replace the clutch pressure plate.

Symptoms: exercise of accelerated shaking or idle jitter

The solution: exercise accelerated on shaking may be broken within the CV Joint; unstable if it is idle shake or idling normal circumstances, that might throttle dirty, the cleaning. Note to wash light throttle not throttle idle valve must open the cleaning the idle valve bearing lubrication Caixing. Washed, should be adjusted throttle, generally idling bolt adjustment in the end you can, otherwise high idle.

The symptoms: cab inside shaking badly, especially when refueling slowly, attached bench, steering wheel with resonance mess.

Solution: ingot beam rubber pad elastic. Put that on the shelf of the right side of the three screws loose. Then stiffened engine branched up, the higher the better. Then the three screws fastening down extremely heavy on the line.

Symptoms: cold-start vehicle jitter.

The main reason is the poor fuel combustion, underpowered vehicles.

A. Low ignition energy: cold start of the vehicle if the engine temperature is low, the lower the temperature of the fuel and lubricating oil, to fuel injection in order to meet the power requirements. After prolonged use, the pole gap of the spark plug is easy to become larger, leading to the ignition energy decline, poor fuel atomization, so that the vehicle occurred jitter. In addition, the aging ignition coil, the spark plug of the high-voltage lines to aging or leakage, can also lead to lower ignition energy.

II. The mixing ratio as inappropriate: In the closed-loop control of the vehicle, the minimum working temperature of the oxygen sensor is 370 degrees Celsius, if the startup of the vehicle, the exhaust pipe temperature of less than 370 degrees Celsius, the oxygen sensor will not work. ECU determines the mistakes, the mixing of oil and gas through the implementing agencies, ignition timing control errors, thereby reducing the power output of the vehicle, there chattering.

III. Valve and inlet coke: If the engine valve and inlet coke, and the coke can absorb the right amount of fuel, error the ECU judgment, the same amounted to less than the required power, jitter phenomenon in the offing a.

IV. Each cylinder has different conditions: after prolonged use, each cylinder spark plug the ignition gap and time control difference, but the ECU can not diagnose this bias still treat each other as equals, which appeared in the practical and theoretical errors, results the some cylinder power generated is small, will cause jitter.

V. The water temperature sensor failure: the water temperature sensor is one of the important basis of the computer judge engine condition. The water temperature sensor failure will cause the computer-controlled fuel injection amount of the deviation of the jitter caused by vehicles.

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