Yuchai engine spare parts Measurement valve assembly 1205710-K57P0

Built to regulate fuel supply with exceptional accuracy for Yuchai engines, this measurement valve assembly features a solenoid-driven precision spool design that ensures consistent fuel metering. It achieves a flow control accuracy of ±2% across the operating range (5-50L/h), precisely adjusting fuel delivery based on ECU signals to match engine load and speed. This precise control optimizes the air-fuel ratio, reducing fuel consumption by 3-5% and minimizing NOx and particulate emissions—helping engines comply with GB 17691-2018 National VI emission standards. The valve’s fast response time (≤30ms) ensures immediate fuel adjustment during transient conditions (e.g., acceleration, deceleration), preventing hesitation and improving engine smoothness

Engineered to endure the harsh operating environment of Yuchai engines, the valve assembly boasts a durable structural design. The valve body is crafted from high-strength aluminum alloy (6061-T6) with a hard anodized surface, resisting corrosion and mechanical wear. The internal spool uses stainless steel (304 grade) with a polished surface finish (Ra ≤0.2μm), reducing friction and ensuring smooth operation after 100,000 cycles. A reinforced solenoid coil (copper wire winding, class H insulation) generates stable electromagnetic force, maintaining performance even with voltage fluctuations (20-28V). The assembly withstands engine vibrations up to 20g (5-2000Hz, ISO 16750-3) and working pressures up to 1.5MPa, preventing leakage or spool jamming during heavy-load operation

Designed to adapt to the extreme temperature and chemical environment of engine compartments, the measurement valve assembly exhibits exceptional resistance. The valve’s seals use fluororubber (FKM) material that maintains elasticity at operating temperatures from -40℃ (northeast China winters) to 150℃ (engine bay peak temperature), passing 500 thermal cycles (-30℃ to 130℃) without hardening or leakage. The aluminum alloy body resists corrosion from diesel fuel, biodiesel blends, and fuel additives, with no measurable weight loss after 72-hour immersion in diesel. The pre-wired harness features high-temperature PVC insulation that resists aging and abrasion, ensuring reliable signal transmission for over 80,000km of service

Optimized for efficient engine maintenance, the valve assembly features a user-friendly design that simplifies replacement and reduces downtime. The 4-bolt mounting flange uses M6×16 galvanized bolts (grade 8.8) that match the engine’s original mounting holes, requiring only a torque wrench (12-15N·m) for fixation. The pre-wired harness includes a weatherproof connector (AMP Superseal 2.8 series) that plugs directly into the ECU, eliminating on-site wiring. The valve’s compact dimensions (85mm×60mm×45mm) fit easily in the crowded engine bay, and clear labeling (“INLET”/“OUTLET”) prevents reverse installation. It requires no regular maintenance—thanks to the wear-resistant spool and corrosion-resistant materials—and comes with a 1-year/100,000km warranty. A single technician can complete replacement in 25 minutes or less, minimizing vehicle downtime for fleet operators