Moteur FAW J6P: La déconstruction ultime à 4 cœurs

Welcome to this expert deconstruction of the Moteur FAW J6P, the model CA6DL2-35E3F powerhouse for the FAW Jiefang CA3250P66K2L1T1E 6×4 tombereau. This is not a simple overview; it is a deep analysis of the “logique” of this powertrain. The core design logic of the Moteur FAW J6P is built on two principles: relentless, heavy-duty reliability for extreme conditions and simplified, modular field serviceability for maximum uptime.

Le “Serviceability Logic” of this Moteur FAW J6P is its most defining feature. The main assembly (1000410J14B) is not just a motor; c'est un complet, pre-assembled, and dyno-tested “long block” replacement. Ce “logique” means that all critical sub-assemblies—the ‘Fuel injection pump’, ‘Turbocharger’, ‘Water pump’, ‘Oil cooler’, ‘Oil-gas separator’, and ‘Rotor filter’—are treated as integrated, unités réparables. This design philosophy is essential for fleet managers, as it allows for rapid, “bolt-on” repairs rather than complex, in-field rebuilds.

This technical guide is an essential resource for senior technicians, gestionnaires de flotte, et spécialistes des pièces détachées. Nous déconstruirons l'ensemble Moteur FAW J6P assemblée. Nous analyserons le “Structural Logic” (the block and head), le “Air & Fuel Logic” (the pump and turbo), le “Thermal Management Logic” (the cooling system), et la critique “Fluid Purity Logic” (the filtration and separation systems).

Cœur 1: Le “Structural Logic” (The Engine’s Core)

While the parts list shows the “long block” as a single unit, its foundational logic is worth understanding. The core of the Moteur FAW J6P is built on its primary castings.

1. Le “Foundry” Logique (Bloc-cylindres):
La fondation du Moteur FAW J6P is its high-strength, cast-iron cylinder block. C'est “logique” is to provide absolute rigidity against the immense, repetitive forces of diesel combustion. This casting contains the “main webs” that hold the crankshaft in perfect alignment and the “water jacket” (coolant passages) that surround the cylinders. UN “wet liner” design is often used, where the cylinder walls are replaceable sleeves, un critique “serviceability logic” for heavy-duty engines.

2. Le “Airflow” Logique (Cylinder Head):
The cylinder head is the “control room” de la Moteur FAW J6P. C'est “logique” is to manage all airflow, fuel injection, and heat. The intake and exhaust ports are not simple holes; they are precisely shaped to induce “swirl” in the intake air, which is essential for efficient, clean combustion. It also contains its own water jacket, which is most aggressive around the exhaust ports and injector bores—the hottest parts of the engine—to prevent warping or cracking.

Cœur 2: Le “Air & Carburant” Logique (Pump & Turbocompresseur)

This group of components, included in the 1000410J14B assembly, is responsible for the “pouvoir” generation logic of the Moteur FAW J6P.

1. Composant: ‘Fuel injection pump’
This is the heart of the engine’s power. C'est “logique” is to create immense pressure. As a High-Pressure Common Rail (HPCR) pompe, it takes low-pressure fuel from the tank and pressurizes it to over 25,000 psi. Ce “pressure logic” is essential for atomizing the diesel fuel into a microscopic mist. Le “logique de service” de la Moteur FAW J6P assembly means this is a pre-timed, pre-calibrated unit, making replacement far simpler than older, mechanical systems.

2. Composant: ‘Turbocharger’
C'est le “efficacité” logique. The turbocharger uses the engine’s “waste” (hot exhaust gas) to spin a turbine. This turbine drives a compressor that “force-feeds” a massive volume of compressed air into the engine. Ce “forced induction logic” allows the Moteur FAW J6P to burn more fuel in the same cylinder size, dramatically increasing both horsepower and torque without a significant weight penalty. It is a critical component for achieving power density in modern diesel engines.

Cœur 3: Le “Thermal Management” Logique (Pompes & Coolers)

A heavy-duty engine creates as much heat as it does power. This group’s “logique” is to manage that thermal load to prevent self-destruction. Il s’agit d’une fonction essentielle du Moteur FAW J6P.

1. Composant: ‘Water pump’
C'est le “coolant circulation” logique. The water pump is a belt or gear-driven centrifugal pump that physically moves hundreds of liters of coolant per minute. C'est “logique” is to continuously force the coolant through the “water jackets” de la Moteur FAW J6P block and head, absorbing heat, and then pushing it out to the radiator to be cooled. A failure here is catastrophic, leading to a rapid overheat.

2. Composant: ‘Oil cooler’
C'est le “oil temperature” logique. Engine oil does two jobs: lubricate and cool. The pistons and turbocharger are cooled *by* the oil. The ‘Oil cooler’ (typically a “plate exchanger”) runs hot engine oil next to cool engine coolant. Ce “thermal transfer logic” pulls heat *out* of the oil and puts it *into* the coolant, where the radiator can dispose of it. This is vital for maintaining oil viscosity and preventing the Moteur FAW J6P depuis “coking” its oil.

Cœur 4: Le “Fluid Purity” Logique (Separators & Filtres)

This final group’s “logique” is to keep the engine’s fluids clean. Contaminated fluids will rapidly destroy any heavy-duty engine.

1. Composant: ‘Oil-gas separator’
C'est le “crankcase ventilation” logique. All engines have “soufflé” (combustion gas that escapes past the piston rings). This gas, mixed with oil vapor, pressurizes the crankcase. The ‘Separator’ a un “filtration logic” that removes the liquid oil “mist” from this gas, returning the oil to the sump and venting the filtered gas into the intake to be re-burned. This prevents the Moteur FAW J6P from blowing out seals and reduces oil consumption.

2. Composant: ‘Rotor filter’
This is an advanced “filtration logic” that works *with* the standard oil filter. A ‘Rotor filter’ (ou “centrifugal filter”) uses oil pressure to spin a central rotor at high speed. Ce “centrifugal logic” slings microscopic contaminants (like soot and fine metal) out of the oil, where they are impacted and captured as a dense sludge. Ce “polishing logic” provides a level of deep cleaning for particles *smaller* than a standard filter can catch, dramatically extending the life of the bearings in the Moteur FAW J6P.

FAW J6P Engine Parts List & Caractéristiques

The following tables provide the complete, detailed breakdown of the primary assembly and the core technical specifications for the Moteur FAW J6P (Model CA6DL2-35E3F), as applied to the FAW Jiefang CA3250P66K2L1T1E 6×4 tombereau.

Spécifications de base

The technical specifications for the Moteur FAW J6P (CA6DL2-35E3F) are defined by its heavy-duty application and fully integrated design.