مجموعة منطق مستشعر المحور الأمامي FAW: لماذا هذه 3 الأجزاء الحرجة هي “مخ” الفرامل الخاصة بك

مرحبًا بك في هذا الدليل الفني المهم حول مجموعة منطق مستشعر المحور الأمامي FAW (حَشد 550). هذا هو الكامل, عالية الدقة “wheel speed sensing” system for the front steer axle of the FAW Jiefang CA4251P66K24T1A3E5 6×4 جرار نصف مقطورة ديزل. هذا التجمع هو الأساسي “eyes and ears” for the vehicle’s Anti-lock Braking System (عضلات المعدة) and traction control.

ال مجموعة منطق مستشعر المحور الأمامي FAW هي مجموعة من المكونات ذات عنصر حيوي واحد “منطق” وظيفة: to precisely measure the rotational speed of each front wheel and report it, in real-time, to the truck’s main ECU and ABS computer. This data is the foundation of all modern active safety systems.

يعد هذا الدليل المتعمق موردًا أساسيًا للفنيين المحترفين والمتخصصين في قطع الغيار. سنقوم بتفكيك الكل مجموعة منطق مستشعر المحور الأمامي FAW فيه 3 core serviceable components: the ‘Wheel speed sensor assembly’ (3550360-6ق), the ‘Sensor seat’ (3550111B1H), and the ‘Sensor sleeve’ (3550361-6ق). فشل في هذا مجموعة منطق مستشعر المحور الأمامي FAW can compromise the truck’s safety.

ال “منطق”: How This Assembly Controls ABS and Traction

ال مجموعة منطق مستشعر المحور الأمامي FAW is the sensory input for the truck’s most critical active safety systems. إنه “منطق” is not mechanical, but electronic. It answers one question, hundreds of times per second: “How fast is this wheel turning?” This data is essential for both the Anti-lock Braking System (عضلات المعدة) and the Traction Control System (TCS).

**Anti-lock Braking (عضلات المعدة) منطق:** When a driver performs a “توقف الذعر” on a wet or icy road, the immense force from the brake chambers can “قفل” the front steer wheels. A locked steer wheel has zero steering capability; the truck will simply plow straight ahead, regardless of the driver’s steering input. ال مجموعة منطق مستشعر المحور الأمامي FAW يمنع هذا. The moment a sensor (3550360-6ق) reports a wheel speed of “صفر” (a lock-up), the ABS computer instantly commands the brake solenoid (انظر الجمعية 539) to release and re-apply the brake on that specific wheel, “pumping” it far faster than any human. هذا “مضاد للقفل” logic keeps the wheel *just* on the verge of locking, providing maximum stopping power while crucially allowing the driver to *steer* around the obstacle.

**التحكم في الجر (TCS) منطق:** This same مجموعة منطق مستشعر المحور الأمامي FAW provides data for traction. If the truck is on a split-traction surface (على سبيل المثال, one wheel on ice, one on pavement) and the driver accelerates, the wheel on the ice will spin uselessly. The ECU sees this “spin-up” via the sensor and can automatically apply a small amount of brake to *just that wheel*, أيّ “fools” the differential into sending torque to the wheel that has traction. This entire safety net is built on the data provided by the مجموعة منطق مستشعر المحور الأمامي FAW.

المكون الأساسي 1: The ‘Wheel Speed Sensor Assembly’ (3550360-6ق)

The star of the مجموعة منطق مستشعر المحور الأمامي FAW is the ‘Wheel speed sensor assembly’ (3550360-6ق). قائمة الأجزاء تدعو إلى اثنين, one for each front wheel. هذا هو الالكتروني “يلتقط” that generates the speed signal.

This is typically a “Hall-effect” أو “magnetic reluctance” مستشعر. إنه “منطق” is to detect magnetic fields. It is mounted via the ‘Sensor seat’ (3550111B1H) so that its tip is positioned a fraction of a millimeter away from the ‘ABS ring’ (أ “حلقة لهجة” with teeth, which is part of the wheel hub assembly, انظر الجمعية 523).

As the wheel hub spins, the teeth of the ABS ring fly past the sensor’s tip. كل “tooth” و “فجوة” يخلق أ “نبض” in the magnetic field. The sensor reads these pulses and sends them as a digital signal (أ “square wave”) to the ECU. The *frequency* of these pulses is directly proportional to the wheel’s speed. The ECU counts these pulses and knows, with pinpoint accuracy, how fast the wheel is turning.

This is the most common failure point in the مجموعة منطق مستشعر المحور الأمامي FAW. The sensor itself is a sealed electronic unit, but it lives in a hostile environment. It can be damaged by:

• **Debris:** A buildup of brake dust and metallic “زغب” on the magnetic tip can block the signal.
• **ضرر:** A rock or road debris can strike the sensor or its wiring, كسر الدائرة.
• **Air Gap:** If the ‘Sensor seat’ (3550111B1H) is bent or corroded, ال “air gap” between the sensor and the ring will be too large, resulting in a weak or non-existent signal.

A failure of this sensor will immediately trigger an ABS warning light on the dashboard and disable both the ABS and traction control systems, reverting the truck to standard, non-logic braking.

المكون الأساسي 2: The ‘Sensor Seat’ (3550111B1H)

The ‘Sensor seat-front wheel brake’ (3550111B1H) هو “قوس” ل مجموعة منطق مستشعر المحور الأمامي FAW. قائمة الأجزاء تدعو إلى اثنين من هذه. This component is far more than a simple bracket; it is a **precision alignment device**.

إنه “منطق” is to hold the ‘Wheel speed sensor’ in the *exact* correct position and at the *exact* correct angle relative to the ABS tone ring. ال “air gap” (the distance between the sensor tip and the ring’s teeth) is the most critical tolerance in the entire مجموعة منطق مستشعر المحور الأمامي FAW.

* **If the gap is too large,** the magnetic pulse from the passing teeth will be too weak for the sensor to read, مما أدى إلى أ “no signal” fault. * **If the gap is too small,** the spinning ABS ring (which can have a tiny “تمايل” أو “نفد”) can strike the sensor tip, destroying it.

This ‘Sensor seat’ is bolted to the non-rotating steering knuckle (انظر الجمعية 510). It is designed to be a rigid, un-flexing mount that can withstand the constant vibration of the wheel and the high temperatures from the brake drum. A failure of this component (على سبيل المثال, a crack, or a bolt loosening from vibration) will cause the sensor to lose its alignment, resulting in a failure of the مجموعة منطق مستشعر المحور الأمامي FAW and the ABS system.

المكون الأساسي 3: The ‘Sensor Sleeve’ (3550361-6ق)

The ‘Sensor sleeve’ (3550361-6ق) هو العنصر الأخير من مجموعة منطق مستشعر المحور الأمامي FAW. The list calls for two of these. هذا المكون “منطق” is one of protection and precise fit.

هذا “كم” is a bushing, typically made of a non-corroding material like bronze, brass, or a high-temperature polymer. The ‘Wheel speed sensor’ is inserted *through* this sleeve, which is itself pressed into the ‘Sensor seat’ (3550111B1H).

This provides two functions. أولاً, it ensures a snug, perfect fit, centering the sensor in the bracket’s bore and preventing it from vibrating. ثانية, والأهم من ذلك, it prevents **galling and corrosion**. The ‘Sensor seat’ is often cast iron or steel, and the ‘Wheel speed sensor’ body may be aluminum or plastic. In a high-salt, high-water environment (like a wheel-end), these two dissimilar metals would corrode and “اغتنام” معاً.

This sleeve acts as an “عازل,” preventing this corrosion. هذا “منطق” ensures that the sensor can be removed for service years later, without breaking. A failed or missing sleeve will lead to a seized sensor, which will almost certainly be destroyed upon removal, turning a simple inspection into an expensive replacement of the entire مجموعة منطق مستشعر المحور الأمامي FAW.

FAW Front Axle Sensor Logic Assembly Parts List

الجدول التالي يوفر كامل, تفصيل مفصل للجميع 3 components identified in the ‘Front Axle Sensor Logic Assembly’ (550) رسم تخطيطي للجرار FAW CA4251P66K24T1A3E5.

المواصفات الفنية وسياق التجميع

المواصفات ل مجموعة منطق مستشعر المحور الأمامي FAW are defined by its function as the primary data-gathering tool for the vehicle’s active safety systems. ال مجموعة منطق مستشعر المحور الأمامي FAW هي عالية الدقة, safety-critical system.