Chery SQRG4G15 Vehicle Engine Assembly Full Aluminum Miller Cycle Engine 1.5L

Chery SQRG4G15 (4th-Generation ACTECO 1.5L DVVT Miller Cycle Naturally Aspirated Engine, Mainstream Family Power Unit for China National VI b)

I. Meaning of Model Designation

SQR: Original factory prefix for all Chery engines G: 4th-generation high-efficiency naturally aspirated gasoline engine series (differentiated from older E/D series) 4: Inline four-cylinder layout G: Naturally aspirated DVVT engine variant 15: 1.5-liter displacement Classification of 1.5L Naturally Aspirated Engines on the Same Platform SQRG4G15: New 4th-generation 1.5L Miller-cycle engine with full-aluminum construction, China National VI b + RDE, main powerplant for current Arrizo 5 / Tiggo 5x SQRE4G15B: Older 3rd-generation 1.5L DVVT engine with cast iron cylinder block, fitted to legacy Arrizo 5 / Tiggo 3X SQRG4G15B: Atkinson-cycle 1.5L engine dedicated to hybrid systems (exclusively for CDM hybrid powertrains, not used on pure gasoline vehicles)

II. Basic Hardware Specifications

Displacement: 1498 mL, 1.5L inline four-cylinder, DOHC 16-valve Bore × Stroke: 74.5 mm × 85.9 mm (long-stroke layout optimized for low-rev fuel economy) Compression Ratio: 11.5:1, dedicated compression ratio for Miller cycle Valve Train: Central OCV intake & exhaust dual DVVT variable valve timing Engine Construction: Full aluminum cylinder block + aluminum cylinder head, lightweight design with excellent heat dissipation Timing System: Silent timing chain (service-free for whole service life; only regular premium oil changes required) Cooling System: Integrated Exhaust Manifold (IEM) + intelligent zoned thermal management with electric water pump Engine Oil Capacity: Approx. 3.6 L Emission Standard: China National VI b + RDE, compliant with current stringent emission regulations Fuel Requirement: Regular 92# gasoline is acceptable

III. Core Power Calibration Parameters (Pure Gasoline SQRG4G15)

Rated Maximum Power: 88 kW / 120 hp @ 6300 rpm Peak Torque: 148 N·m @ 4900 rpm Specific Power: 58.8 kW/L Peak Thermal Efficiency: 39.1% Minimum Brake Specific Fuel Consumption: 258 g/kW·h Fuel Consumption Reference (WLTC Cycle) 5MT Sedan (Arrizo 5): 6.4 L/100km CVT Sedan (Arrizo 5): 6.6 L/100km 5MT Compact SUV (Tiggo 5x): 6.98 L/100km Actual Combined Urban Fuel Consumption: 7.0–8.2 L/100km Constant-speed Fuel Consumption at 60 km/h: 5.1 L/100km

IV. Core Technical Highlights (Exclusive 4th-Generation Upgrades)

Deep Miller cycle paired with high compression ratio drastically reduces pumping loss, delivering an 8% improvement in fuel economy versus the older 4G15B variant Full-aluminum lightweight construction cuts engine weight by 20 kg compared with cast iron predecessors, lowering vehicle fuel consumption and curb load Central OCV DVVT enables faster valve adjustment response, balancing performance for low-speed commuting and high-speed cruising Intelligent thermal management with electric water pump accelerates cold-start warm-up by 20%, noticeably reducing fuel consumption in low-temperature winter conditions i-HEC high-efficiency combustion system with high-tumble intake ports ensures complete combustion and eliminates sluggish power at low RPM Full-range low-friction design: DLC coated piston rings, mirror-honed cylinder liners, low-tension bearing shells, cutting mechanical energy loss by 15% MPI port injection avoids the common intake valve carbon deposit issue of direct-injection engines, minimizing maintenance costs for frequent short-distance trips Silent timing chain eliminates timing belt replacement fees for long-term hassle-free operation

V. Core Differences vs. Legacy SQRE4G15B

VI. Vehicle Models Equipped (Pure Gasoline SQRG4G15)

Chery Sedans 2024/2025 Arrizo 5 1.5L MT/CVT, Arrizo 5 Pro Youth Edition Chery Compact SUVs 2024 Tiggo 5x 1.5L Manual / 9-speed Simulated CVT Matching Transmissions 5-speed manual transmission, 9-speed simulated continuously variable transmission (CVT)

VII. Maintenance & Vehicle Operation Precautions

Engine Oil Specification: 5W-30 SN/SP full-synthetic oil recommended; semi-synthetic oil as minimum standard. Long-term use of mineral oil is not advised. Maintenance Interval: 7,500 km or 12 months (whichever comes first); initial maintenance at 5,000 km Carbon Deposit Reminder: Multi-point injection generates almost no intake port carbon deposits, so frequent intake valve cleaning is unnecessary; clean the throttle valve every 30,000 km only Consumable Replacement Schedule: Replace spark plugs every 40,000 km; clean fuel injectors every 30,000 km Driving Characteristics: Peak torque is delivered at relatively high RPM, resulting in mild power output below 2500 rpm, ideal for gentle urban commuting. Higher RPM is required to extract sufficient power under full load or during climbing. Translation Standard Notes Automotive abbreviations: DOHC, DVVT, OCV, MPI, IEM, RDE, WLTC, MT, CVT, DLC retain universal industry standard abbreviations Vehicle names: Arrizo, Tiggo adopt Chery official English naming standards Emission standards: China National V / VI b follow unified international automotive translation norms Technical units: kW, hp, N·m, rpm, L/100km, mm, mL use global standard metric symbols Professional terms: Miller Cycle, Otto Cycle, Brake Specific Fuel Consumption (BSFC) adopt standard automotive engineering terminology