Chery SQR472WB Vehicle Engine Assembly Inline Four Cylinder Engine 1.2L

Chery SQR472WB (ACTECO 1.2L Horizontal Naturally Aspirated Mini Cargo Engine)

Complete SQR472WB Engine Assembly Side View of Engine Block

I. Meaning of

Model Designation SQR: Factory prefix for all Chery engines 4: Inline four-cylinder layout 72: Cylinder bore of 72 mm W: Horizontal transverse layout (designed for compact engine bays of Karry minivans & mini trucks, differentiated from vertical 472F for QQ) B: High-spec cargo-dedicated variant with enlarged 1.2L displacement Classification of Horizontal Engines on the Same 472 Platform SQR472WF: 1083mL/1.1L, entry-level light-load version, 55kW/75 hp SQR472WB: 1173mL/1.2L, high-spec heavy-load version, 59kW/80 hp SQR472WD: Optimized 1.251L variant complying with China National V, 60kW/82 hp, peak torque 108 N·m SQR472WC: Early low-power horizontal 1.1L engine for China National IV

II. Basic Hardware Specifications

Displacement: 1173mL (1.2L), horizontal inline four-cylinder, water-cooled four-stroke Bore × Stroke: 72mm × 72mm Compression Ratio: 10.0:1 Valve Train: DOHC dual overhead camshaft, 4 valves per cylinder (16 valves total); no VVT variable valve timing system Engine Construction: Cast iron cylinder block + aluminum cylinder head with high torsional strength for heavy loads Timing System: Timing belt (full kit replacement mandatory at 60,000 km; a snapped belt will bend engine valves) Engine Oil Capacity: Approx. 3.0 L Overall Layout: Dedicated horizontal structure for front-wheel-drive layout Emission Standard: Dual versions meeting China National IV / National V Fuel Requirement: 92# or higher octane gasoline

III. Core Power Calibration Parameters (Factory Calibration for SQR472WB)

Rated Maximum Power: 59kW / 80 hp @ 6000 rpm Maximum Net Power: 56.5kW Peak Torque: 106 N·m @ 3500–4500 rpm Specific Power: 50.3 kW/L Minimum Brake Specific Fuel Consumption: 247 g/kW·h Fuel Consumption Reference Constant-speed fuel consumption at 40 km/h: 5.4 L/100km Combined urban fuel consumption under full load: 7.8–9.2 L/100km Steady suburban fuel consumption with no load: 6.2–7.0 L/100km Officially declared combined fuel consumption: 7.9 L/100km

IV. Core Technical Highlights

Enlarged 1.2L design with extended stroke, delivering stronger power reserve under full cargo load compared with the 1.1L variant Dedicated horizontal architecture perfectly fits narrow engine bays of Karry minivans and mini trucks with high space utilization DOHC 16-valve layout delivers more powerful high-RPM output than 8-valve engines of equal displacement, providing sufficient reserve power for high-speed cargo transport MPI port injection generates nearly no carbon deposits inside intake ports, lowering maintenance costs for frequent short-distance hauling Cast iron cylinder block resists deformation under long-term heavy loads and climbing conditions with outstanding durability Simple and universal mechanical structure with low-cost spare parts, serviceable at maintenance workshops nationwide

V. Core Differences vs. 1.1L Horizontal SQR472WF

VI. Equipped Vehicles (Horizontal-Layout Exclusive Models)

Karry Minivans High-spec Karry Youyou, Karry Youyou Gen.2, Karry Yousheng / Yousheng Gen.2 Karry Mini Trucks 1.2L extended single-row / double-row Karry Youjin Matching Transmission 5-speed manual transmission QR512M

VII. Maintenance & Vehicle Operation Precautions

Engine Oil Specification: 5W-30 mineral oil is acceptable; semi-synthetic oil is recommended for long-term full-load cargo transport Timing Belt: Full kit replacement (belt + tensioner + idler pulley) required at 60,000 km; belt breakage leads to extremely high repair costs Maintenance Interval: 5,000 km or 6 months (whichever comes first); initial maintenance at 3,000 km Consumable Replacement Cycle: Spark plugs replaced every 30,000 km; throttle valve and fuel injectors cleaned every 20,000–30,000 km Driving Characteristics: Torque is concentrated above 3500 rpm with weak power output below 3000 rpm; higher RPM must be maintained when climbing under full load. This engine is designed mainly for short-distance urban freight transportation. Translation Standard Notes Automotive professional abbreviations: DOHC, VVT, MPI retain universal international industry standards Brand: Karry = official English name for Karry；model names Youyou, Yousheng, Youjin adopt unified transliteration Emission standards: China National IV / V are standard automotive industry translations Units: kW, hp, N·m, rpm, L/100km, mm, mL adopt international unified metric symbols Technical terms: Brake Specific Fuel Consumption (BSFC) is the standard full name for fuel consumption rate g/kW·h