3104983
Product Details
Comprehensive Professional Description: Brilliance H330 Crankshaft (Part No. 3104983)
1. Basic Overview & Core Functional Positioning
The 3104983 is an authentic Original Equipment Manufacturer (OEM) crankshaft, meticulously engineered and exclusively produced for the Brilliance H330, a compact sedan renowned for its reliability, fuel efficiency, and practical performance under the Brilliance Auto brand. As the core power transmission component of the vehicle’s engine, the crankshaft serves as the “heart” of the engine’s crankshaft-connecting rod mechanism, undertaking the critical task of converting the linear reciprocating motion of the pistons (generated by the combustion of fuel in the cylinders) into rotational motion. This conversion is the fundamental driving force that powers the vehicle, directly determining the engine’s power output, torque performance, operational stability, and overall service life. The part number 3104983 acts as a unique identifier, guaranteeing strict compliance with Brilliance’s original engineering specifications, material standards, and performance requirements, making it the only authorized replacement for the crankshaft of all Brilliance H330 production years and its exclusive engine variant.
The Brilliance H330 is exclusively equipped with the self-developed BM15L 1.5L naturally aspirated engine, which features Variable Valve Timing (VVT) technology, delivering a maximum power of 77kW at 5800rpm and a maximum torque of 143Nm in the range of 3800-4200rpm. The 3104983 crankshaft is tailor-made to match the structural characteristics and performance parameters of this BM15L engine, ensuring seamless integration and optimal power transmission. For Brilliance H330 owners and professional automotive repair technicians, the reliability and precision of the 3104983 crankshaft are non-negotiable, as it operates under extremely harsh conditions: it endures continuous high temperatures (up to 300°C in the combustion chamber area), high-pressure loads (up to tens of megapascals during the power stroke), and high-frequency rotational motion (up to thousands of revolutions per minute). A faulty or worn crankshaft can lead to catastrophic engine malfunctions, including piston seizure, crankshaft bending or fracture, cylinder wall scuffing, excessive engine noise, reduced power output, oil leaks, and even complete engine failure.
As a genuine OEM component, the 3104983 crankshaft is manufactured in strict accordance with Brilliance’s rigorous quality control standards, international automotive component regulations (including ISO 9001 and IATF 16949), and the precise technical parameters of the H330’s BM15L engine. This ensures consistent performance, perfect fitment, and long-term reliability, making it the preferred choice for maintaining the Brilliance H330’s engine in factory-grade condition and preserving the vehicle’s signature reliability and fuel efficiency. Unlike generic aftermarket crankshafts, the 3104983 is tailor-made for the H330’s specific engine configuration, eliminating compatibility issues and ensuring seamless integration with the vehicle’s existing engine components—pistons, connecting rods, bearings, and flywheel. Whether replacing a worn crankshaft due to normal wear and tear, or a damaged one due to improper maintenance, engine overheating, or mechanical impact, the 3104983 can restore the H330’s engine to its original performance, ensuring optimal engine operation and extending the engine’s service life.
2. Premium Material Selection & Precision Manufacturing Process
The 3104983 crankshaft is crafted from high-performance, automotive-grade materials, selected specifically to meet the strict requirements of a critical engine component—prioritizing high tensile strength, fatigue resistance, wear resistance, and dimensional stability. The material selection is optimized to balance performance, durability, and cost-effectiveness, ensuring the crankshaft can withstand the harsh operating environment of the engine (including extreme temperature fluctuations, constant mechanical stress, and exposure to engine oil and combustion by-products) while delivering consistent, long-term reliability.
The core material of the 3104983 crankshaft is high-quality forged steel (Grade 40Cr), a material widely recognized in the automotive industry for its exceptional combination of high tensile strength (≥1000MPa), excellent fatigue resistance, and good machinability. Forged steel 40Cr undergoes a precision forging process, which refines the material’s microstructure, eliminating internal defects such as pores and inclusions, and enhancing its overall mechanical properties. This makes the crankshaft capable of withstanding the high-pressure loads and repeated mechanical impacts during engine operation without deformation or fracture. Additionally, 40Cr steel has excellent wear resistance and corrosion resistance, ensuring the crankshaft maintains its structural integrity and dimensional accuracy even after prolonged exposure to engine oil, fuel, and combustion gases.
To further enhance the performance and durability of the 3104983 crankshaft, it undergoes a series of specialized surface treatments and heat treatments. First, the entire crankshaft undergoes a quenching and tempering heat treatment process, which optimizes the material’s hardness, strength, and toughness. The quenching process increases the material’s hardness (up to HRC 38-42), while the tempering process reduces brittleness and improves toughness, ensuring the crankshaft can absorb impact energy without breaking. The crankshaft’s main journals and connecting rod journals are precision ground and coated with a wear-resistant phosphating layer, which reduces friction between the crankshaft and the bearings, minimizing wear and ensuring smooth operation. The external surface of the crankshaft is treated with anti-corrosion paint, which prevents rust and oxidation, extending the component’s service life.
The manufacturing process of the 3104983 crankshaft follows a strict, ISO 9001 and IATF 16949 certified production workflow, combining precision forging, automated machining, and rigorous quality control—consistent with modern automotive engine component manufacturing standards. The production process begins with the preparation of raw materials: high-purity 40Cr steel billets are selected and inspected to ensure they meet Brilliance’s material standards. The billets are then heated to a high temperature (around 1100-1200°C) and forged using a precision closed-die forging process, which shapes the billet into the basic form of the crankshaft. This forging process ensures the crankshaft’s structural integrity and uniform material distribution, critical for its mechanical performance.
After forging, the crankshaft undergoes a heat treatment process (quenching and tempering) to optimize its mechanical properties. Following heat treatment, the crankshaft undergoes a series of precision machining steps. The main journals and connecting rod journals are precision bored and honed to achieve a strict dimensional tolerance (±0.002 mm) and surface roughness (Ra 0.1-0.3 μm), which is critical for proper fitment with the engine block bearings and connecting rods. The crankshaft’s crank arms and balance weights are precision milled to ensure uniform thickness and flatness, reducing weight imbalance and ensuring smooth operation during engine operation. The oil passages and keyways on the crankshaft are drilled and milled with automated equipment, ensuring precise alignment and dimensional accuracy—critical for proper lubrication and power transmission.
After machining, each 3104983 crankshaft undergoes a series of rigorous quality inspections, including dimensional accuracy testing, hardness testing, fatigue testing, balance testing, and non-destructive testing (NDT). Dimensional accuracy testing verifies that the crankshaft’s overall dimensions, journal diameters, crank arm thickness, and other key parameters match Brilliance’s OEM specifications. Hardness testing confirms that the material’s hardness meets the required standard (HRC 38-42), ensuring wear resistance and structural strength. Fatigue testing subjects the crankshaft to repeated mechanical loads simulating engine operation, ensuring it can withstand long-term use without fatigue failure. Balance testing ensures that the crankshaft’s weight is evenly distributed, reducing vibration during engine operation. Non-destructive testing (such as magnetic particle testing) detects hidden cracks or defects that may not be visible to the naked eye, ensuring the crankshaft’s structural integrity. Only units that pass all inspections are packaged and delivered, guaranteeing that each 3104983 crankshaft meets Brilliance’s OEM standards and provides reliable performance. Additionally, the crankshaft comes with a 12-month quality guarantee, reflecting the manufacturer’s confidence in its durability and reliability.
3. Structural Design & Key Integrated Components
The 3104983 crankshaft features a sophisticated, integrated structural design, meticulously engineered to match the Brilliance H330’s BM15L engine crankshaft-connecting rod system, ensuring seamless integration, secure attachment, and optimal performance. Its design is optimized to balance functionality, durability, and weight reduction, while adhering to Brilliance’s original engineering standards and international safety regulations. The overall structure of the crankshaft consists of main journals, connecting rod journals, crank arms, balance weights, front shaft end, rear shaft end, and integrated oil passages—all working together to ensure efficient force transmission, smooth operation, and reliable performance.
The main journals of the 3104983 crankshaft are cylindrical structures, designed to support the crankshaft on the engine block’s main bearings, allowing it to rotate smoothly. The number of main journals corresponds to the engine’s cylinder configuration; for the BM15L 1.5L engine, the crankshaft is equipped with 5 main journals, adopting a full-support design. This full-support structure enhances the crankshaft’s rigidity and stability, reducing the load on each main journal and ensuring even wear, which is critical for withstanding the high rotational speeds and mechanical loads of the engine. The main journals are precision ground and coated with a wear-resistant phosphating layer, ensuring a tight, smooth fit with the main bearings, minimizing friction and wear.
The connecting rod journals (also known as crankpins) are cylindrical structures designed to connect to the big end of the engine’s connecting rods. For the BM15L engine, the 3104983 crankshaft is equipped with 4 connecting rod journals, corresponding to the 4 cylinders of the engine. The connecting rod journals are offset from the crankshaft’s central axis, allowing them to convert the linear motion of the pistons into rotational motion. The connecting rod journals are precision honed and coated with a wear-resistant phosphating layer, ensuring a smooth fit with the connecting rod bearings. Additionally, the connecting rod journals are made hollow to reduce the crankshaft’s weight and the centrifugal force generated during high-speed rotation, which improves the engine’s responsiveness and reduces wear on the bearings. The hollow interior of the connecting rod journals also serves as an oil passage, facilitating lubrication and heat dissipation.
The crank arms (also known as webs) connect the main journals and connecting rod journals, transmitting the force from the connecting rods to the main journals and ensuring the crankshaft’s structural integrity. The crank arms of the 3104983 crankshaft are designed with a streamlined shape, optimizing the strength-to-weight ratio and reducing the inertial force generated during rotation. Some crank arms are integrated with balance weights, which are designed to balance the crankshaft’s unbalanced centrifugal force and centrifugal torque, as well as a portion of the reciprocating inertial force. This balance design reduces engine vibration, ensures smooth operation, and extends the service life of the crankshaft, bearings, and other engine components.
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