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Brand: C.OEFT
OE numbers: 11211719984
Product Name: Timing Camshaft Sprocket
Compatible model:
Product status: New
Number of teeth on the product:
Product weight: 2.000kg
Packaging size: 17X17X8.5 cm
Product packaging: Neutral Packaging
Car Series: German
Car Type: For BMW
As a key component of the engine’s VVT system, the sprocket-actuator assembly works with the ECU to dynamically optimize valve timing:
·Camshaft Sprocket: Transmits power from the timing chain to the camshaft, maintaining a 1:2 rotation ratio (standard for four-stroke engines) while ensuring the camshaft’s rotational position is precisely synchronized with the crankshaft.
·VVT Actuator: Adjusts the relative phase between the sprocket and camshaft via engine oil pressure. For example:
·Low-Speed/Low-Load (e.g., urban commuting): Advances the intake valve opening timing to increase the intake charge, boosting low-end torque (critical for Audi Q5’s off-road 起步 and Mercedes-Benz C-Class’s city driving responsiveness).
·High-Speed/High-Load (e.g., highway acceleration): Delays the intake valve closing timing to extend the intake stroke, improving high-speed power output (e.g., enhancing Audi A4L 45 TFSI’s 0-100km/h acceleration and Mercedes-Benz E300’s highway overtaking capability).
2. Optimize Engine Efficiency & Fuel Economy
·Improve Combustion Efficiency: By adjusting valve timing to match different engine loads, the actuator ensures the air-fuel mixture is fully burned. Tests show it can reduce fuel consumption by 2%-4% in partial-load conditions (e.g., Audi A6L 2.0T TFSI’s highway fuel consumption drops from 6.8 L/100km to 6.6 L/100km; Mercedes-Benz C260’s urban fuel consumption decreases from 8.5 L/100km to 8.2 L/100km).
·Reduce Pumping Loss: In light-load conditions (e.g., cruising at 90km/h), the VVT system can adjust the exhaust valve timing to create "internal exhaust gas recirculation (EGR)", reducing the engine’s pumping loss and further lowering fuel consumption.
·OE-Grade Fit for Target Engines: Strictly manufactured to match the dimensional and performance specifications of Audi and Mercedes-Benz original equipment (OE). It is fully compatible with key engine families, such as:
Audi: 2.0T TFSI (EA888 Gen3) in models like A4L, Q5; 3.0T TFSI (EA839) in A6L, Q7.
Mercedes-Benz: 2.0T BlueDIRECT (M274) in C-Class (W205), E-Class (W213); 3.0T BlueDIRECT (M276) in E-Class, S-Class.
The sprocket’s tooth profile (involute design with 0.02mm tolerance) and the actuator’s oil passage layout align perfectly with the engine’s VVT hydraulic circuit, avoiding issues like "oil leakage" or "phase adjustment jamming" common in universal aftermarket parts.
·Direct Replacement for OE Components: The mounting holes, flange diameter, and torque specifications of the sprocket-actuator assembly are identical to the original 11211719984 part. No modifications to the camshaft, timing cover, or oil lines are required, enabling seamless installation that matches factory service standards.
2. High-Durability Materials for Long-Term Reliability
·Wear-Resistant Camshaft Sprocket: Crafted from heat-treated ductile iron (QT600-3)—a material widely used in Audi/Mercedes-Benz OE sprockets—with a "hobbing → shaving → carburizing quenching" process. The tooth surface hardness reaches HRC 58-62, and the roughness is Ra 0.4μm, reducing friction and wear when paired with the timing chain. Its service life exceeds 200,000 km, matching the design life of the host engines.
·High-Pressure Resistant VVT Actuator Housing: Made of aluminum alloy (A380) with CNC precision machining, the actuator housing can withstand the high oil pressure (up to 12 bar) of Audi/Mercedes-Benz VVT systems. The internal rotor and stator are coated with tungsten disulfide (WS₂) to minimize metal-to-metal friction, preventing "seizure" caused by high-temperature oil degradation (a common failure in low-quality actuators).
·Sealing & Corrosion Protection: Equipped with fluororubber (FKM) seals (resistant to engine oil and high temperatures up to 250℃) to prevent oil leakage between the actuator and camshaft. All metal surfaces feature a zinc-nickel alloy coating (10μm thickness) for anti-corrosion, ensuring stability in humid or high-temperature engine bay environments.
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