FAW Exhaust System: Критическое руководство по его 34 After-Treatment Components

Добро пожаловать в это важное техническое руководство по FAW Exhaust System для FAW Jiefang CA4251P66K24T1A3E5 6×4 дизельный полуприцеп тягач. This is not just a muffler; it is a complete, multi-stage emissions after-treatment system, essential for modern diesel performance and environmental compliance.

The FAW Exhaust System is a highly engineered assembly responsible for two primary tasks: noise reduction (muffling) and emissions neutralization. This guide focuses on the ‘Selective Catalytic Reduction (Скрипт) After-treatment Assembly’ (1208010-90Р-С00), что такое “logic box” that uses urea (DEF) to convert harmful NOx into nitrogen and water.

This in-depth guide is a vital resource for professional technicians, менеджеры автопарка, и специалисты по запчастям. Мы разберем всю FAW Exhaust System в свой 34 исправные компоненты, including the main SCR unit, the inlet/outlet piping, the critical heat shields, and all the specialized mounting brackets and hardware.

Основной компонент: The SCR After-Treatment Assembly (1208010-90Р-С00)

The heart of the modern FAW Exhaust System is the ‘Selective Catalytic Reduction After-treatment Assembly’ (1208010-90Р-С00). This is the large, chassis-mounted “коробка” that all other components in this list support. It is not a simple muffler; it is an active chemical reactor.

This unit contains a series of catalysts. Первый, the hot exhaust gas passes through a **Diesel Oxidation Catalyst (ДОКТОР)**, which breaks down carbon monoxide (CO) and unburnt hydrocarbons (HC). Следующий, it passes through a **Diesel Particulate Filter (DPF)**, which is a ceramic “soot trap” that physically captures the black smoke particles.

After the DPF, the urea (DEF) is injected into the gas stream. This mixture then enters the **Selective Catalytic Reduction (Скрипт)** catalyst. Здесь, the ammonia in the urea reacts with the harmful Nitrogen Oxides (NOx), converting them into harmless nitrogen (N2) и вода (H2O). This complex, multi-stage process is the “логика” принадлежащий FAW Exhaust System. A failure of this component will trigger a “Check Engine” light and will cause the truck to fail emissions testing.

Inlet Piping and Vibration Damping

The FAW Exhaust System is mounted to the chassis, but the engine vibrates and twists. A rigid pipe connecting the two would snap in minutes. The ‘Telescopic bellows assembly’ (1203040-2000) это решение. This is a flexible, corrugated steel joint that absorbs the engine’s movement and thermal expansion, protecting the rest of the FAW Exhaust System from stress.

This bellows connects to the ‘Inlet pipe assembly-select catalytic reduction’ (1203815-92Вт), which is the main, pre-bent pipe that feeds the hot gas from the turbocharger into the SCR assembly.

This inlet pipe is heavy and must be supported, which is the job of the ‘Bracket assembly-inlet pipe’ (1203045-92Вт). Этот кронштейн, along with its ‘Combination bolts’ (CQ1461045) и «Шестигранные гайки’ (CQ34010), holds the pipe securely to the engine or chassis, preventing it from cracking under its own weight. This entire inlet path is a critical part of the FAW Exhaust System.

The Critical Heat Shield System

The DPF “regeneration” цикл, which burns off trapped soot, can raise the temperature of the FAW Exhaust System to over 600°C (1100° F.). This intense radiant heat is a major fire hazard. This parts list includes a comprehensive heat shield system to protect the truck.

This includes the ‘Heat shield assembly’ (1204045-92W and 1204025-92W), which are large, stamped-metal shields. More specifically, the SCR box is wrapped in its own set of shields:

• ‘Upper heat shield-after-treatment’ (1204038-92Вт)
• ‘Side heat shield-after-treatment’ (1204046-92Вт)
• ‘Front heat shield-after-treatment’ (1204028-76Вт)

These shields create a “thermal barrier” of air, reflecting the heat and protecting the chassis, fuel lines, Жгуты проводки, and anything else nearby. A missing heat shield on the FAW Exhaust System is a major safety violation and will lead to melted components. These shields are secured by a ‘Bracket assembly’ (1203055-92Вт) and specialized ‘Hex flange bolts’ (Q1841455, Q1841450, Q1841475).

Mounting and Support Hardware

The heavy ‘SCR After-treatment Assembly’ (1208010-90Р-С00) is held in place by a robust cradle system. This includes the ‘Bracket assembly-after-treatment’ (1203050-92Вт) and ‘Bracket assembly-after-treatment’ (1203055-92Вт).

These brackets are secured to the chassis, and the SCR box is then held by the ‘Clamping band assembly-after-treatment’ (1203090-73Вт). These bands wrap around the unit and are tensioned with bolts. To prevent metal-on-metal contact, a ‘Gasket plate assembly’ (1203025А263) is used as a vibration-damping insulator.

The rest of the FAW Exhaust System, such as the tailpipe, is hung using the ‘Clamp-muffler hanger’ (1203041-274). The entire assembly is fastened with a large array of ‘Hex flange lock nuts’ (CQ32610, Q932614), ‘Hex nuts’ (CQ34010, CQ34008, CQ34012), ‘Hex head bolts’ (CQ1501030, CQ1501025), и «Прокладки пружин’ (Q40310, Q40308). This hardware is all high-temperature and vibration-resistant, essential for the reliability of the FAW Exhaust System.

FAW Exhaust System Parts List

В следующей таблице представлена ​​полная, подробная разбивка всех 34 components identified in the ‘Exhaust System’ схема трактора FAW CA4251P66K24T1A3E5. Этот FAW Exhaust System is a complex after-treatment assembly.

Технические характеристики и контекст сборки

Технические характеристики FAW Exhaust System определяются по своей функции как полное, chassis-mounted emissions after-treatment system. Весь FAW Exhaust System is critical for emissions compliance and noise reduction.