Dongfeng KR truck parts EP selection switch assembly 3750380-C5101

Built as the core control component for Dongfeng KR’s dynamic power adjustment, this switch enables precise switching between three operating modes with millisecond-level response. In Eco mode, it signals the ECU to optimize fuel injection (reducing pulse width by 15%) and limit torque to 80% of maximum, cutting fuel consumption by 8-10% during long-haul logistics. Power mode unlocks full torque (up to 1200N·m for YC6JA engines) for uphill or heavy-load scenarios, with switch response time ≤100ms to avoid power lag. Standard mode balances efficiency and performance for urban distribution. The switch’s gold-plated contacts ensure stable signal transmission, with mode switching accuracy ≥99.9%—preventing erroneous power adjustments that cause fuel waste or component wear

Engineered for frequent use by drivers, the switch assembly features an ergonomic design with multi-dimensional feedback. The toggle lever has a textured rubber grip (Shore hardness 65±5) that provides non-slip operation, even with greasy or gloved hands. Each mode position has a clear detent force (3-5N) that gives tactile confirmation, eliminating accidental switching. Integrated LED indicators (green for Eco, red for Power, blue for Standard) with 500cd/m² brightness ensure visibility in both bright sunlight and night driving. The switch’s placement (15° tilt toward the driver) aligns with the natural movement of the right hand, reducing arm fatigue during repeated adjustments—critical for drivers on 8+ hour shifts

Designed to endure the harsh conditions of truck cabs (vibration, temperature fluctuations, dust), the switch assembly boasts exceptional structural durability. The housing is made of flame-retardant ABS+PC alloy (UL94 V-0 rating) with a sealed structure, achieving IP65 waterproof/dustproof protection. Internal components use high-temperature resistant plastics (operating range -40℃ to 85℃), maintaining performance in northeast China’s frigid winters and southwest China’s hot summers. The switch withstands 500,000 toggle cycles (far exceeding the 100,000-cycle industry average) and 20g vibration loads (5-2000Hz, ISO 16750-3) without failure. Gold-plated contacts resist oxidation and corrosion, ensuring stable operation even in high-humidity environments

Optimized for fleet maintenance efficiency, the switch assembly features plug-and-play installation and built-in diagnostics. The 8-pin waterproof connector plugs directly into the dashboard wiring harness, and the switch secures via 2 M3×8 self-tapping screws—one technician can complete replacement in 15 minutes. The assembly supports UDS diagnostic protocol, allowing technicians to read switch status (contact resistance, mode signal) via Dongfeng’s dedicated diagnostic tool. It transmits fault codes (e.g., contact wear, signal loss) to the ECU, enabling proactive maintenance before complete failure. With a service life of ≥180,000km and a 1-year warranty, it minimizes downtime and reduces maintenance costs. Clear laser markings (mode labels, part number) prevent installation errors, ensuring reliable operation from day one