Головка блока цилиндров FAW J6P: Полное руководство по обслуживаемым частям 4-ядерного процессора

Добро пожаловать в эту окончательную техническую деконструкцию Головка блока цилиндров FAW J6P, the core serviceable casting for the engine powering the FAW Jiefang CA3250P66K2L1T1E 6×4 дизельный самосвал.

This is not the *complete* assembly, но “bare head” сам (P/N 1003011A59D / 1003011-59Д)—the single most complex casting in the powertrain.

The “логика” принадлежащий Головка блока цилиндров FAW J6P это быть “control room” of combustion. It must perform three critical tasks: withstand immense heat and pressure, manage all engine “дыхание” (airflow), and serve as a complex heat exchanger.

The “design logic” этого конкретного Головка блока цилиндров FAW J6P is centered on durability and, самое главное, “serviceability.” This component group is what an engine machine shop would use to rebuild a head. It includes the replaceable “носить” items that are press-fit into the main casting, such as the valve guides and valve seats. A crack or warp in the main Головка блока цилиндров FAW J6P casting is one of the most severe engine failures, as it allows coolant, масло, and combustion gases to mix, приводящие к катастрофическому провалу. Understanding its serviceable components is therefore essential for any long-term fleet maintenance.

Это экспертное руководство является важным ресурсом для специалистов по ремонту двигателей., техники механического цеха, и менеджеры по запчастям. We will deconstruct this entire 10-component type group into its four primary “логика” система: а “Main Casting & Тормоз” Логика (the bare head itself), а “Valvetrain Interface” Логика (the replaceable guides and seats), критический “Уплотнение инжектора” Логика (copper sleeves and O-rings), и “Foundry Sealing” Логика (the various plugs that make the Головка блока цилиндров FAW J6P casting fluid-tight).

Основной 1: The “Main Casting & Тормоз” Логика (Компонент 1)

This component is the structural foundation for this entire group. All other parts are installed *into* this one.

1. Компонент: ‘Cylinder head’ (1003011А59Д / 1003011-59Д)
Это основной Головка блока цилиндров FAW J6P кастинг. The parts list shows two distinct part numbers, и “логика” is explicitly stated: один (1003011А59Д) is for trucks “with engine brake,” and the other (1003011-59Д) is for trucks “without engine brake.” This is a critical distinction. The “Логика торможения двигателем” of the ‘A59D’ part means the casting has complex, additional oil galleries drilled deep into it. These passages are designed to route high-pressure engine oil to the engine brake (или “Джейк Брэйк”) система, which is housed in the rocker assembly above. The “non-brake” Головка блока цилиндров FAW J6P lacks these passages and is a simpler, and therefore different, кастинг.

Both versions share the same “foundry logic,” being cast from a high-strength, temperature-stable iron alloy. Их “thermal logic” is the intricate “water jacket”—a complex, web-like internal passage that allows coolant to circulate aggressively around the two hottest areas: the exhaust valve seats and the fuel injector bores. This prevents the Головка блока цилиндров FAW J6P from warping or cracking under extreme load. The “airflow logic” этого Головка блока цилиндров FAW J6P is in its precision-cast intake and exhaust ports, which are shaped to optimize air “swirl” for a clean, powerful combustion.

Основной 2: The “Valvetrain Interface” Логика (Компоненты 8, 9, 10)

Эта группа представляет собой ядро “serviceability logic” принадлежащий Головка блока цилиндров FAW J6P. Это “носить” surfaces for the valvetrain, and they are designed to be replaceable.

1. Компонент: «Направляющая клапана’ (1003014-29Д)
Список требует 24 гиды (Комп 8), one for each of the 24 клапаны (12 прием, 12 выхлоп). The “логика” of a ‘Valve guide’ должен быть сменным, втулка с низким коэффициентом трения. The Головка блока цилиндров FAW J6P casting is iron, but running a hardened valve stem directly in the iron would cause rapid wear. Вместо, these guides (often made of a bronze alloy or a different iron composite) являются “press-fit” в голову. Их “precision logic” is to hold the valve in perfect alignment, allowing it to seal correctly against the seat. When these wear out, they can be “прессованный” out and replaced, восстановление Головка блока цилиндров FAW J6P к “like-new” состояние.

2. Компоненты: «Седло впускного клапана’ (1003012-36Д) & «Седло выпускного клапана’ (1003013-36Д)
Это “Логика герметизации сгорания.” Клапаны должны плотно прилегать к идеально круглому, невероятно твердая поверхность. The cast iron of the Головка блока цилиндров FAW J6P is too soft for this. The “логика” здесь нужно запрессовать два разных типа седел клапанов.’ (Комп 9 & 10) в голову. «Седло выпускного клапана’ (Комп 9) сделан из очень твердого, жаропрочный стальной сплав (как Стеллит) to withstand superheated exhaust gases. «Седло впускного клапана’ (Комп 10) is also hardened steel, but with different properties as it is cooled by the intake air. Их “сервисная логика” is that they are the “жертвенный” часть; they can be re-ground (а “работа клапана”) multiple times, and if they wear too much, they can be machined out and replaced, which saves the entire Головка блока цилиндров FAW J6P casting from being scrapped.

Основной 3: The “Уплотнение инжектора” Логика (Компоненты 3 & 4)

Эта группа “логика” is to create a perfect, “двойное уплотнение” for the high-pressure fuel injectors. This is a critical task in a modern diesel, sealing both combustion *in* and fluids *out*.

1. Компонент: ‘Injector copper sleeve’ (1003016-29Д)
Список требует 6 sleeves (Комп 4), one for each injector. Этот компонент “логика” является “combustion sealing” и “heat transfer.” This sleeve is pressed into the bottom of the injector bore in the Головка блока цилиндров FAW J6P. The “copper logic” is that copper is a soft, malleable metal. It creates a perfect “раздавить” seal against the injector tip, предотвращения 2500+ PSI of combustion gas from escaping. It also acts as a vital “heat sink,” pulling heat *away* from the delicate injector tip and transferring it into the coolant in the Головка блока цилиндров FAW J6P‘s water jacket. This dual-seal system is a hallmark of a robust, modern diesel engine design.

2. Компонент: 'Уплотнительное кольцо’ (1003018-29Д)
Список требует 6 уплотнительные кольца (Комп 3). Это “fluid sealing logic.” These O-rings sit in a groove higher up on the injector or injector sleeve. Их “логика” is to prevent fluids (fuel from the return galley or oil from the valvetrain) from leaking *out* of the engine, and to prevent coolant from leaking *into* the injector bore. A failure of the copper sleeve (Комп 4) leads to combustion in the coolant; a failure of the O-ring (Комп 3) leads to fuel in the oil or an external leak. Both are critical seals for the Головка блока цилиндров FAW J6P.

Основной 4: The “Foundry Sealing” Логика (Компоненты 2, 5, 6, 7)

Эта последняя группа “логика” это просто: to plug the holes left by the manufacturing process. A complex casting like a Головка блока цилиндров FAW J6P cannot be made without numerous access holes.

Компоненты: ‘Bowl plug’ (Q72240, Q72232, Q72222, Q72226)
These components are commonly known as “freeze plugs” или “core plugs.” Их “логика” is to seal the large, circular holes in the Головка блока цилиндров FAW J6P кастинг. These holes are an essential part of the “sand casting” процесс, as they are used to remove the internal sand “основной” that forms the complex shape of the water jacket. After casting, these plugs are hammered or pressed in to create a permanent, watertight seal for the cooling system.

The parts list shows a high quantity (1 + 1 + 6 + 16 = 24 total plugs) of various sizes, which demonstrates the extreme complexity of the internal coolant passages. Note that, just like the head casting itself, there is a specific ‘Bowl plug’ (Комп 5, Q72232) designated for the “моторный тормоз” version. Этот “brake logic” implies it is used to seal a specific access hole that was drilled for the engine brake’s oil gallery, a hole that does not exist on the non-brake version of the Головка блока цилиндров FAW J6P.

FAW J6P Cylinder Head Parts List & Технические характеристики

В следующей таблице представлена ​​полная, подробная разбивка всех 10 serviceable component types identified in this Головка блока цилиндров FAW J6P группа для FAW Jiefang CA3250P66K2L1T1E 6×4 самосвал.

Основные характеристики

The specifications for the bare Головка блока цилиндров FAW J6P are defined by its function as the serviceable core for airflow and combustion.