Weichai 12M33D960A1BG

Manufacturer gas-package review 2026-10-21; source 12M33D960A1BG数据单-2025.pdf, sheet date as printed 01/02/24, pp.1 and 3. Gross mechanical engine ratings at 1800 rpm / 60 Hz: COP 816 kW; PRP 960.0; ESP N/A (kW). COP is continuous power and is not relabelled PRP or ESP. General power_kw uses the highest stated gross duty. Fuel: biogas with CH4 content >=50%. Lean-burn spark ignition; turbocharged/intercooled; liquid cooling (water + 50% antifreeze). Compression 12.5:1; dry mass 4600 kg without radiator; dimensions without radiator 2789 x 1558 x 1636 mm, manufacturer outline drawing takes precedence. Source emissions field is N/A and provides no emissions certification. Fuel-consumption LHV values are thermal-input kW, not L/h or m3/h; no volumetric consumption is inferred. Production status unknown. Discontinued is the user-approved catalogue classification for unknown historical status, not manufacturer confirmation of production cessation. Frequency/source reconciliation 2026-10-21: exact model is listed at 60 Hz in the manufacturer model-specific sheet and the 2026 Weichai Jiangdu catalogue gas table, p.2. No opposite-frequency values required removal on this record. Electrical ratings were reviewed against the source worksheet; formula-derived values, where present, were removed. No fixed alternator efficiency or power factor is assumed. Additional manufacturer installation/service specifications, applicable to the documented model and speed: Bore x stroke: 150 x 185 mm (p.3). Flywheel ring gear teeth: 194 (p.3). Oil sump capacity low/high: 120 / 146 L (p.5). Maximum exhaust back pressure: 75 mbar (p.5). Minimum exhaust pipe diameter: 195 mm (p.5). Maximum gas inlet temperature: 50 °C (p.6). Customer supply pressure before gas regulator, min/max: 0.3/ 0.5 bar (p.6). Supply pressure at engine inlet, min/max: 70/ 100 mbar (p.6). Minimum gas inlet pipe diameter: 80 mm (p.6). Electrical system, negative ground: 24 V DC (p.6). Starter power: 8.5 kW (p.6). Battery charger rated current: 55 A (p.6). Minimum cold-start temperature without auxiliary device: -5 °C (p.6). Engine sound pressure level at 1 m: 100 dB(A) (p.5). Noise test conditions: 100% rated power, 1 m distance, engine without radiator, cooling fan or silencer; ISO 6798. Cold-start temperature is the listed limit without auxiliary starting device, not an ambient continuous-operation limit. Pressure values distinguish upstream regulator bar from engine inlet mbar. Source sheet date is printed 01/02/24. Additional system specifications reviewed 2026-10-21: Maximum intake-air temperature rise before turbocharger: ≤ 5 °C (datasheet p.4). Air-intake restriction, clean filter: ≤ 30 mbar (datasheet p.4). Air-intake restriction, dirty filter: ≤ 50 mbar (datasheet p.4). Maximum intercooler intake pressure drop: 120 mbar (datasheet p.4). Minimum coolant outlet pipe internal diameter HT/LT respectively: 45 / 50 mm (datasheet p.4). Engine-only coolant capacity HT/LT respectively: 76 / 35 L (datasheet p.4). Thermostat initial opening / fully open temperature: HT:80 / 92 LT:40/52 °C (datasheet p.4). Minimum cooling-system pressure: 0.5 bar (datasheet p.4). Engine coolant-pump flow HT/LT respectively at 1800 rpm: 65.6 / 32.1 m³/h (datasheet p.4). Maximum additional cooling-circuit restriction: 500 mbar (datasheet p.4). Maximum oil temperature: 105 °C (datasheet p.5). Oil flow: 470 L/min (datasheet p.5). Maximum starting-circuit resistance: 2 mΩ (datasheet p.6). Minimum starting-circuit wire cross-section: 70 mm² (datasheet p.6). Battery-charging alternator power consumption: 1.54 kW (datasheet p.6). HT/LT means high-temperature/low-temperature coolant circuits; paired circuit capacities and flows have not been collapsed into totals. Engine-only coolant capacity excludes separately specified radiator/pipe capacity. Thermostat pairs describe opening/fully-open temperature, not alarm/shutdown thresholds. Intake temperature rise is not an absolute ambient limit. Battery-charging alternator consumption is an engine accessory load, not generator electrical output. Values apply to the exact model and source configuration; source date as printed 01/02/24.