Cummins engine auto parts Fuel injector connecting rod C5686288

As a critical component transmitting camshaft force to the fuel injector, this connecting rod is crafted from heat-treated 42CrMo alloy steel—an industry benchmark for strength and fatigue resistance. The material undergoes quenching and tempering processes, achieving a tensile strength of 1000MPa and yield strength of 800MPa, which is 25% higher than standard carbon steel alternatives. The rod’s surface is precision-ground to a roughness of Ra ≤0.4μm, minimizing friction between the small-end bushing and injector pin. A shot peening treatment (coverage ≥95%) creates a compressive stress layer of -500MPa on the surface, effectively preventing fatigue cracks even after 100 million cycles of high-frequency actuation—ideal for the X15 engine’s 1500-2100rpm operating range

Engineered to maintain precise fuel injection timing (±0.01mm displacement), the C5686288 connecting rod features ultra-tight dimensional tolerances. The rod’s center-to-center distance is calibrated to 70mm (±0.02mm), ensuring consistent actuation stroke for each fuel injector. The big-end and small-end bores are honed to a roundness error of ≤0.005mm, ensuring uniform load distribution and smooth rotation with the camshaft follower and injector pin. A tapered transition between the rod body and ends reduces stress concentration, while the rod’s I-beam cross-section optimizes weight-to-strength ratio—reducing inertial forces by 15% and minimizing vibration during high-speed operation. This precision ensures the injector opens and closes at the exact crankshaft angle, maximizing fuel combustion efficiency and reducing emissions

Optimized to endure the harsh conditions of the engine cylinder head, the connecting rod exhibits exceptional corrosion and wear resistance. Its surface undergoes a three-step protective treatment: phosphating for rust priming, electroplating with a 10μm nickel layer for corrosion barrier, and a final application of anti-wear molybdenum disulfide coating. This system resists corrosion from fuel residues and engine oil contaminants, passing 1500-hour neutral salt spray testing (ASTM B117) with no pitting. The small-end bushing is made of sintered bronze (CuSn10Pb5) with self-lubricating properties, reducing wear against the injector pin by 40% and extending the rod’s service life to ≥300,000km—twice the lifespan of aftermarket alternatives

The C5686288 connecting rod plays a vital role in enhancing fuel efficiency and reducing maintenance costs for Cummins-powered vehicles. Its precise actuation ensures each injector delivers the exact fuel quantity (±2% tolerance) required for the engine’s load condition, reducing fuel consumption by 3-5% compared to worn or low-quality rods. By maintaining accurate injection timing, it minimizes unburned fuel and particulate emissions, ensuring compliance with EPA 2021 and China VI emission standards. The rod’s high durability reduces replacement frequency, while its OE compatibility eliminates the risk of injector damage caused by mismatched components (repair costs up to $1,200 per injector). Installation is simplified by its drop-in design, requiring only standard torque tools (45N·m for mounting bolts). Backed by a 2-year/250,000km Cummins warranty, it provides reliable performance for heavy-duty applications and minimizes unplanned downtime for fleet operators