Four wheel alignment四轮定位

Note:提示： ♦  Four-wheel alignment is extremely important to maintain driving safety, steering stability and normal tire wear. If the vehicle alignment angle is incorrect, it may drift or slide during emergency braking, leading to serious accidents. Tire life may be shortened during normal operation, and misalignment or failure of components such as steering tie rods often leads to loss of steering control, with disastrous consequences. Therefore, four-wheel alignment of the vehicle is crucial.四轮定位对维持驾驶安全、转向稳定以及轮胎正常磨损是极为重要的，车辆定位角度不正确，在紧急制动时可能发生跑偏、侧滑，导致严重事故。在正常运行时可能使轮胎寿命缩短，而转向横拉杆等部件的失调或失效往往会导致丧失转向控制，其结果不堪设想，因此对车辆进行四轮定位至关重要。 ♦  Four-wheel alignment includes front wheel alignment and rear wheel alignment. The front wheel alignment includes front wheel camber angle, kingpin caster angle, and front wheel toe-in. The rear wheel alignment includes rear wheel camber angle and rear wheel toe-in.四轮定位包括前轮定位和后轮定位，前轮定位包括前轮外倾角、主销后倾角、前轮前束，后轮定位包括后轮外倾角和后轮前束。 ♦  The four-wheel alignment adjustment sequence is to adjust the rear wheels first and then the front wheels.四轮定位调整顺序为先调整后轮再调整前轮。 ♦  The rear wheel should first adjust the rear wheel camber and then adjust the rear wheel toe.后轮应先调整后轮外倾角再调整后轮前束。 ♦  The adjustment sequence of the front wheel is kingpin caster, kingpin inclination, front wheel camber and front wheel toe.前轮的调整顺序为主销后倾角、主销内倾角、前轮外倾角和前轮前束。

1. Inspection before positioning1. 定位前检查 1 Make sure that the four tires are of the same specifications and the tire pressure should be within the specified pressure range.确保4个轮胎是相同规格，轮胎气压应在规定压力范围内。 Tire pressure: 250kPa轮胎气压：250kPa   Note:提示： ♦  It cannot be lower than 10% of the standard tire pressure at normal temperature.在常温下不能低于轮胎标准气压的10％。 2 Make sure there are no people in the car, there is a spare tire and tools (if equipped) and there is no excess load in the car.确保车内没有人员，有备胎和随车工具(若配有)且没有多余载荷在车内。 3 Check whether each fixed point of the suspension is loose and deformed, check whether there is excessive play between the steering linkage and the suspension, check whether the steering tie rod end and ball joint are worn, the spring cannot be loose, and the swing arm and front strut cannot have excessive play.检查悬架的每个固定点是否松动和变形，检查转向联动装置和悬架不能有过多的间隙，检查转向横拉杆端头和球节的磨损，弹簧不能是松弛的，摆臂和前滑柱不能有过多的游隙。 4 Check vehicle wheel bearings.检查车辆轮毂轴承。 5 The corresponding height positions on both sides of the inspection vehicle should be consistent.检测车辆两侧对应高度位置应一致。 6 The steering wheel must be centered when the wheels are in the straight forward position. If necessary, remove the steering wheel to make adjustments.当车轮在笔直向前的位置时，方向盘必须是居中的。如有必要，拆卸方向盘进行调整。 7 Do the wheel dynamic balancing test. After the dynamic balancing is completed, install the wheel back on the car.做车轮动平衡试验，动平衡完成后，将车轮装回车上。   Note:提示： ♦  Do not attempt to align parts for positioning. Damaged parts must be replaced.请勿试图用校直零件的方式进行定位，损坏的零件必须更换。

2. Detection2. 检测   Note:提示： ♦  Follow the wheel aligner operating instructions to check the wheel alignment.按照四轮定位仪的操作说明，检查车轮定位。 ♦  The rear suspension data of torsion beam models cannot be adjusted. If the error is large, the rear suspension assembly needs to be replaced.扭力梁车型的后悬架数据不可调，如误差较大需更换后悬架总成。

1 Check the rear wheel camber angle.检测后轮外倾角。 Rear wheel camber angle: –1°15'±30'后轮外倾角：–1°15'±30'

2 Check the total toe of the rear wheels.检测后轮总前束。 Total rear wheel toe: -6'±24'后轮总前束：-6'±24'

3 Detect the caster angle of the front wheel kingpin.检测前轮主销后倾角。 Kingpin caster angle: 6°7′±45′主销后倾角：6°7′±45′   Note:提示： ♦  Turn the steering wheel and the test report will be displayed on the instrument screen after completion.转动方向盘，完成后仪器屏幕将显示检测报告。   Caution:注意： ♦  The kingpin caster angle is guaranteed by the design structure and does not need to be adjusted during use. If the parameter exceeds the specified range, directly replace the steering knuckle.主销后倾角是为设计结构上保证的，使用中无需调整，如果参数超出规定范围，直接更换转向节。

4 Check the front wheel camber angle.检测前轮外倾角。 Front wheel camber angle: -6′±45′前轮外倾角：-6′±45′   Note:提示： ♦  Turn the steering wheel so that it is roughly horizontal in the left and right directions, and read the front wheel camber angle on the instrument display.转动方向盘，使其在左右方向大致处于水平状态，在仪器显示屏上读出前轮外倾角。 ♦  Under normal circumstances, it is not necessary to adjust the camber angle after the independent suspension and wheel steering knuckle are assembled. If the front wheel camber angle deviates greatly, the corresponding damaged parts need to be replaced.正常情况下独立悬架和车轮转向节装配后不必调整外倾角，若前轮外倾角偏差较大，则需更换相应损坏零件。

5 Check the front wheel toe.检测前轮前束。 Front wheel toe: 5′±5′前轮前束：5′±5′   Note:提示： ♦  Keep the vehicle in a straight line.使车辆处于直线状态。   Caution:注意： ♦  If the inspection results do not meet the requirements, adjustments should be made.若检查结果不符合要求，应调整。

3. Adjust the front wheel toe-in3. 调整前轮前束

1 Loosen the locking nuts ① and elastic clamp A of the left and right steering tie rods.松开左右转向横拉杆的锁紧螺母①及弹性卡箍A。 Recommended tools: 24mm open-end wrench推荐工具：24mm开口扳手 2 Twist the toe adjustment lever as needed and adjust the length until the specified value.根据需要拧动前束调整杆，调整长度，直到规定数值。

3 Tighten the locking nut ①, install the sheath elastic clamp A, and check whether the locking nut is tightened and the sheath is in the correct position.紧固锁紧螺母①，安装护套弹性卡箍A，并检查锁紧螺母是否拧紧，护套位置是否正确。 Recommended tools: 24mm open-end wrench推荐工具：24mm开口扳手 Torque requirement: 55-65N·m扭矩要求：55-65N•m 4 After the front wheel toe is adjusted, check whether the steering wheel is in the neutral position. If it is not in the middle position, it should be adjusted.前轮前束调整好后，检查方向盘是否位于中间位置。若不在中间位置应调整。 5 Use the diagnostic tool to clear the steering angle fault, and follow the diagnostic tool prompts to learn and reset the steering angle.用诊断仪清零转向角故障，根据诊断仪提示进行转向角学习和归零。   Warning:警告： ♦  In order to ensure the safety of the road test, one person is required to drive the vehicle and one person to operate the decoder, and operate according to the prompts in the prescribed test area.为确保路试安全，需要一人驾驶车辆，一人操作解码器，在规定试车区按提示进行操作。