مجموعة منطق مستشعر المحور الخلفي FAW: تحليل نقدي ل 4 مكونات ABS/TCS الأساسية

مرحبًا بك في هذا الدليل الفني المهم حول مجموعة منطق مستشعر المحور الخلفي FAW (حَشد 555). هذا هو الكامل, عالية الدقة “wheel speed sensing” system for the rear *drive axles* 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 System (TCS).

ال مجموعة منطق مستشعر المحور الخلفي FAW هي مجموعة من المكونات ذات عنصر حيوي واحد “منطق” وظيفة: to precisely measure the rotational speed of each rear drive 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 on the 6×4 جرار.

يعد هذا الدليل المتعمق موردًا أساسيًا لفنيي الديزل المحترفين والمتخصصين في قطع الغيار. سنقوم بتفكيك الكل مجموعة منطق مستشعر المحور الخلفي FAW فيه 4 core serviceable components: the ‘Wheel speed sensor’ (3605360-A6T-S), the ‘Sensor bracket’ (3550117A377-S), the ‘Sensor sleeve’ (3550361-6ق), and the ‘Wire guide bushing’ (3605221-A6T-S). فشل في هذا مجموعة منطق مستشعر المحور الخلفي FAW can compromise the truck’s safety and braking performance.

ال “منطق” of ABS and Traction Control (TCS)

ال مجموعة منطق مستشعر المحور الخلفي 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 drive wheels. A locked wheel has zero traction and can cause a dangerous “jackknife” situation. ال مجموعة منطق مستشعر المحور الخلفي FAW يمنع هذا. The moment a sensor (3605360-A6T-S) reports a wheel speed of “صفر” (a lock-up), the ABS computer instantly commands the brake solenoid (انظر الجمعية 539/545) 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 maintaining stability.

**التحكم في الجر (TCS) منطق:** This same مجموعة منطق مستشعر المحور الخلفي FAW يوفر “منطق” for acceleration. If the 6×4 tractor 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, wasting power. The ECU sees this “spin-up” (one wheel spinning much faster than the others) via the sensor signal. It then can automatically apply a small amount of brake to *just that wheel* (or cut engine power). هذا “منطق” fools the axle’s differential into sending torque to the wheel that *does* have traction, allowing the truck to move. This entire safety net is built on the data provided by the مجموعة منطق مستشعر المحور الخلفي FAW.

المكون الأساسي 1: ‘Wheel Speed Sensor’ (3605360-A6T-S)

The star of the مجموعة منطق مستشعر المحور الخلفي FAW is the ‘Wheel speed sensor’ (3605360-A6T-S). قائمة الأجزاء تدعو إلى اثنين, one for each side of the drive axle. 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 bracket’ (3550117A377-S) 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 524/525).

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 الخلفي 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” from the brake drum 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 bracket’ (3550117A377-S) 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. A faulty مجموعة منطق مستشعر المحور الخلفي FAW is a critical safety issue.

المكون الأساسي 2: نظام التركيب (قوس & كم)

The ‘Sensor bracket’ (3550117A377-S) and ‘Sensor sleeve’ (3550361-6ق) هي “منطق القوس” جزء من مجموعة منطق مستشعر المحور الخلفي FAW.

**’Sensor bracket’ (3550117A377-S):** This 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 الخلفي 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.

**’Sensor sleeve’ (3550361-6ق):** 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 bracket’. This prevents the sensor body (plastic/aluminum) from corroding and “seizing” to the steel or iron bracket, ضمان مجموعة منطق مستشعر المحور الخلفي FAW can be serviced.

المكون الأساسي 3: ‘Wire Guide Bushing’ (3605221-A6T-S)

المكون النهائي لل مجموعة منطق مستشعر المحور الخلفي FAW is the ‘Wheel speed sensor wire guide bushing’ (3605221-A6T-S). This simple-looking part is a critical “منطق” component for reliability.

The sensor wire must run from the wheel-end, along the axle housing, and up to the chassis frame harness. This entire path is a “hostile environment” full of heat (from the brakes and differential), اهتزاز, and flying road debris (الصخور, الجليد, إلخ.).

هذا “guide bushing” هو متخصص, high-temperature rubber or polymer grommet. It is used to safely pass the wire through a hole in a chassis bracket. إنه “منطق” is to prevent **chafing**. Without this bushing, the sharp, metal edge of the bracket hole would, under constant vibration, rub through the wire’s insulation. This would cause a short-circuit, grounding out the sensor signal and disabling the ABS. This simple bushing is the “armor” that protects the “الجهاز العصبي” التابع مجموعة منطق مستشعر المحور الخلفي FAW.

FAW Rear Axle Sensor Logic Assembly Parts List

الجدول التالي يوفر كامل, تفصيل مفصل للجميع 4 components identified in the ‘Rear Axle Sensor Logic Assembly’ (555) رسم تخطيطي للجرار FAW CA4251P66K24T1A3E5.

المواصفات الفنية وسياق التجميع

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