Chery SQRH4J15 Deep Miller Cycle Dedicated Hybrid Engine TGDI 1.5 Liter

Chery SQRH4J15 (Kunpeng C-DM 5th-Generation Hybrid-Dedicated 1.5TGDI Engine)

I. Meaning of

Model Designation SQR: Original factory prefix for all Chery engines H: Hybrid-dedicated engine (differentiated from F-series fuel-only engines) 4: Inline four-cylinder layout J: TGDI (Turbocharged Gasoline Direct Injection) 15: 1.5-liter displacement Model Distinction on the Same Platform SQRH4J15: High-efficiency deep Miller-cycle 1.5T engine exclusive for hybrids (standard equipment across all CDM6.0 PHEV / EREV models) SQRF4J15: Conventional fuel-only 1.5TGDI (for gasoline vehicles, compression ratio 11.6:1, without calibration optimized for hybrid power generation)

II. Basic Hardware Specifications

Displacement: 1499 mL, 1.5T inline four-cylinder, DOHC 16-valve Bore × Stroke: 72 mm × 92 mm (long-stroke design prioritizing low-speed power generation efficiency) Compression Ratio: Ultra-high 14.5:1 Engine Assembly: Full aluminum cylinder block and cylinder head with Integrated Exhaust Manifold (IEM) Valve Train: Dual DVVT variable valve timing for intake and exhaust Fuel Supply: 350 bar ultra-high-pressure gasoline direct injection Turbocharging: Electronically actuated wastegate (E-WG) turbo with water-cooled intercooler Timing System: Silent timing chain EGR System: Low-pressure cooled EGR (maximum EGR rate 30%, suppresses engine knock and boosts thermal efficiency) Ignition System: 120 mJ high-energy ignition coils Engine Oil Capacity: Approximately 3.8 L Overall Engine Weight: 108 kg Emission Standard: China National VI b + RDE, compatible with China National VII / Euro VII regulations Fuel Requirement: 92# gasoline is acceptable

III. Power Calibration Parameters (SQRH4J15)

Official Declared External Performance Rated Maximum Power: 115 kW / 156 hp @ 5500 rpm Peak Torque: 220 N·m @ 1750–4000 rpm Net Bench Output (Power Generation Calibration) Maximum Net Power: 105 kW @ 5200 rpm Maximum Net Torque: 215 N·m @ 2500 rpm Core Thermal Efficiency Indicators Peak Thermal Efficiency: 45.79% Thermal Efficiency in Comprehensive High-Efficiency Range: 44.5% Power Generation Economy: 3.67 kWh of electricity generated per liter of fuel Fuel Consumption Reference (CDM6.0 System) WLTC Charge-Depleting Fuel Consumption: 3.9–4.2 L/100km Comprehensive Driving Range: Over 1600 km

IV. Core Technical Highlights (Hybrid-Exclusive Optimizations)

Deep Miller Cycle + 14.5 Ultra-High Compression Ratio The long-stroke layout combined with early intake valve closing drastically reduces pumping loss, serving as the core foundation for ultra-high thermal efficiency, specially tuned for stable low-speed power generation in hybrid vehicles. 350 bar High-Pressure Direct Injection + High-Tumble Intake Ports Delivers finer fuel atomization to support lean combustion; paired with low-pressure EGR to lower cylinder temperature and mitigate knock. E-Water-Cooled Intercooler + Integrated Intelligent Thermal Management Equipped with an electric water pump and split cooling circuits for rapid warm-up during cold starts, cutting winter charge-depleting fuel consumption by 8%. E-WG Electronically Controlled Wastegate Turbocharger Precisely regulates boost pressure to maintain steady torque output under power generation conditions, with minimal turbo lag. Full-Range Friction Reduction Design Low-tension piston rings, piston cooling oil jets and low-friction bearing shells reduce wear caused by frequent start-stop cycles unique to hybrid powertrains. Hybrid-Exclusive NVH Tuning Optimized vibration suppression for generator coupling; engine noise during power generation is better controlled than standard fuel-only 1.5T engines.

V. Core Differences vs. Fuel-Only SQRF4J15

SQRH4J15 (Hybrid-Dedicated)

SQRF4J15 (Fuel-Only Version)

Compression Ratio 14.5:1 11.6:1 Combustion Cycle Deep Miller Cycle Conventional Otto Cycle Peak Thermal Efficiency 45.79% Approx. 38% Positioning Power generation + high-speed direct drive, efficiency-oriented Pure fuel drive, acceleration performance-oriented Stroke Layout 72×92 long stroke, strong low-speed power generation 74.5×85.9 short stroke, powerful high-RPM output EGR System Standard high-flow low-pressure cooled EGR No low-pressure EGR

VI. Vehicle Models Equipped (Kunpeng C-DM 6.0 PHEV / EREV)

Chery Fengyun Series Fengyun A8, Fengyun T9, Fengyun T9L, Fengyun T11 Exeed StarEco Series StarEco ET, StarEco ES Extended-Range Version Jetour / Jaecoo Jetour Traveler PHEV, Jetour Shanhai Series, Jaecoo J7 PHEV Matched Transmissions 3-speed DHT hybrid-exclusive transmission (CDM6.0) Fixed-gear power generation architecture for extended-range electric vehicles

VII. Maintenance & Vehicle Operation Precautions

Engine Oil Specification: 0W-30 ACEA C3 full-synthetic motor oil Maintenance Interval: 10,000 km or 12 months (whichever comes first); first maintenance at 5,000 km Carbon Deposit Reminder: As a direct-injection engine, if you frequently drive short trips in pure electric mode with rare engine operation, add fuel detergent every 10,000 km. Consumable Replacement Schedule: Replace spark plugs every 40,000 km; clean throttle valve and fuel injectors every 30,000 km. Operation Characteristics: Urban driving relies mainly on electric motor propulsion; the engine only runs at constant speed for power generation and rarely operates under high load, resulting in far less mechanical wear than gasoline-only vehicles. Translation Standard Notes Brand & Series Names: Kunpeng, Fengyun, Exeed, StarEco, Jetour, Jaecoo adopt Chery’s official English trade names; C-DM, DHT, TGDI, DVVT, E-WG, EREV, PHEV retain global automotive standard abbreviations. Units: kW, hp, N·m, rpm, bar, mL, mm, L/100km, kWh follow international automotive unified symbols. Emission Terms: China National VI b / VII, RDE, Euro VII use official industry standard translations. Technical Terms: IEM, NVH, EGR, Miller Cycle, Otto Cycle follow universal automotive engineering terminology.