Блок логики защиты передней части днища FAW: Деконструкция 29 Критические компоненты

Добро пожаловать в это важное техническое руководство по Блок логики защиты передней части днища FAW. Это полный “FUPD” (Front Underrun Protection Device) system for the FAW Jiefang CA4251P66K24T1A3E5 6×4 дизельный полуприцеп тягач. This is not an optional or cosmetic part; это критично, chassis-mounted safety and structural component.

The Блок логики защиты передней части днища FAW это сверхмощный, engineered steel structure. Its primary “логика” is to provide a low, rigid barrier at the very front of the truck. This system is mandated by safety regulations (like ECE R93) to prevent smaller vehicles from “under-running” (sliding under) the high chassis of the tractor in a frontal collision. It is designed to engage the other vehicle’s crumple zones.

This in-depth guide is an essential resource for professional body shop technicians, менеджеры автопарка, и специалисты по запчастям. Мы разберем всю Блок логики защиты передней части днища FAW в свой 29 исправные компоненты (total quantity of parts listed), including the main ‘Crossmember’ (2802070-91Вт), the ‘Left Brackets’ (2802021-91Вт), and all the critical high-tensile fasteners that secure this safety device.

Основной компонент: The Main Crossmember (2802070-91Вт)

Сердце Блок логики защиты передней части днища FAW is the ‘Front underbody protection crossmember welded assy’ (2802070-91Вт). This is the main horizontal “луч” или “bar” системы. It is a massive, heavy-gauge steel fabrication, likely a C-channel or box-section, designed for one purpose: to absorb and transfer impact energy.

Этот компонент является “логика” of the FUPD system. In a frontal collision with a smaller vehicle, this crossmember is the primary point of contact. It is engineered to be extremely strong, preventing the smaller vehicle from going *under* the truck frame and directly impacting the front axle, рулевой механизм, or engine. This crossmember is the core of the Блок логики защиты передней части днища FAW‘s strength.

The “welded assy” designation signifies that it is a multi-piece fabrication, robotically welded for consistent strength and quality. It is made from high-strength low-alloy (HSLA) steel, which is designed to deform in a controlled manner under a severe impact, absorbing energy rather than shattering. This controlled deformation protects the truck’s main frame rails from being bent, which would total the vehicle. A bent or cracked crossmember in the Блок логики защиты передней части днища FAW must be replaced immediately.

The “Кронштейны”: Chassis Connection (2802021-91Вт)

If the crossmember is the “shield,” the ‘Front underbody protection left bracket’ (2802021-91Вт) units are the “оружие” that hold it. These are the critical, high-strength structural components of the Блок логики защиты передней части днища FAW. В списке запчастей указано два, which are the left-hand and right-hand symmetrical brackets.

Это “bones” системы, forged or fabricated from thick, high-strength steel plate. Their function is to connect the entire Блок логики защиты передней части днища FAW to the main chassis frame rails of the truck. They are the “логика” that transfers impact forces *away* from the bumper and *into* the vehicle’s frame, which is designed to handle them.

These brackets are not designed to be a “crumple zone”; they are designed to be an unyielding, rigid link. They are bolted to the front “рога” или “flanges” of the truck’s main C-channel frame, often sharing bolt holes with the front spring hangers or tow hooks. This ensures the Блок логики защиты передней части днища FAW is anchored to the strongest part of the truck.

These brackets also provide the primary alignment points. A minor bend in one of these brackets, while not always visible, will cause the entire Блок логики защиты передней части днища FAW (and the cosmetic bumper that mounts to it) to appear crooked, with uneven gaps. A misaligned assembly is a sign of compromised safety, as the impact-transfer logic is now flawed.

Система крепления: High-Tensile Hardware

A safety system like the Блок логики защиты передней части днища FAW is only as strong as its fasteners. This assembly is held together by a specific set of 26 high-tensile bolts and washers designed to withstand extreme shear and vibrational forces.

**1. ‘Hex head bolt’ (CQ1501240T) – 8 единицы:** These are the primary structural bolts. The “Т” суффикс указывает на высокий класс прочности на разрыв (НАПРИМЕР., 10.9) and a specialized coating. Эти 8 bolts are likely used to connect the ‘Crossmember’ (2802070-91Вт) to the two ‘Brackets’ (2802021-91Вт).

**2. ‘Hex head flange bolt’ (Q1851440T) – 10 единицы:** These are the secondary structural bolts. The “фланец” head acts as an integrated, wide-area washer. This is critical for spreading the clamping load on the chassis rail, preventing the bolt from “прорываясь” the steel frame under extreme force. Эти 10 bolts are almost certainly the ones used to secure the two ‘Brackets’ directly to the truck’s main chassis frame rails.

**3. ‘Spring gasket’ (Q40312) – 8 единицы:** Это критически важно “lock washers.” They are paired with the ‘Hex head bolts’ (CQ1501240T). Their function is to exert constant spring tension on the bolt head, physically preventing the bolt from vibrating loose. In a high-vibration environment like a truck chassis, a standard washer would be useless, and the bolts would quickly fail. The total hardware package for the Блок логики защиты передней части днища FAW is robust.

This fastener “логика” is a key part of the Блок логики защиты передней части днища FAW. Using non-specified, lower-grade bolts (НАПРИМЕР., a standard Class 8.8) from a hardware store would compromise the entire safety system, as they would shear off or vibrate loose, causing the FUPD to fail during an impact. Inspecting the Блок логики защиты передней части днища FAW includes checking these bolts.

FAW Front Underbody Protection Logic Assembly Parts List

В следующей таблице представлена ​​полная, подробная разбивка всех 29 components identified in the ‘Front Underbody Protection Logic Assembly’ схема трактора FAW CA4251P66K24T1A3E5. Этот Блок логики защиты передней части днища FAW is a critical safety-of-life component.

Технические характеристики и контекст сборки

Технические характеристики Блок логики защиты передней части днища FAW are defined by its function as a heavy-duty, chassis-mounted safety system. The Блок логики защиты передней части днища FAW is a non-optional, safety-critical system.