Chery SQRE4T15B Turbo DVVT Vehicle Engine Assembly 1.5L DOHC MPI Gasoline Engine

Complete Introduction to Chery SQRE4T15B (1.5TCI DVVT) Engine

I. Basic Background

The SQRE4T15B is a second-generation ACTECO 1.5L turbocharged multi-point fuel injection engine jointly developed by Chery, Austria’s AVL and . It is a fully optimized and upgraded version of the original SQRE4T15. Officially mass-installed on vehicles in 2016, it serves as the core powertrain for family sedans and compact/midsize SUVs, primarily complying with China National V emission standards, and can meet China National VI a after minor late-stage adjustments. The engine adopts a cast iron cylinder block plus aluminum alloy cylinder head with multi-point manifold injection and no high-pressure direct injection. Featuring a simple structure, low failure rate and affordable maintenance, it comes with a factory warranty of 10 years / 1,000,000 kilometers. Its subsequent upgraded iteration meeting China National VI b is the SQRE4T15C.

II. Core Technical Specifications

SQRE4T15B 1.5TCI DVVT

Structure Inline four-cylinder, water-cooled four-stroke, DOHC dual overhead camshaft, 4 valves per cylinder, dual DVVT intake & exhaust variable valve timing Displacement 1498mL (1.5L) Bore × Stroke 77mm × 80.5mm Compression Ratio 9.5:1 Fuel Supply System MPI multi-point manifold port injection (no in-cylinder direct injection) Turbocharger Maximum Power 115kW (147 hp) @ 5500rpm; maximum net power 108kW Peak Torque Standard 210N·m @ 2000–4000rpm; temporary overboost up to 230N·m Timing Mechanism Silent timing chain; inspect elongation at 150,000 km, mandatory replacement unnecessary Cylinder Block / Cylinder Head Pressure-resistant cast iron cylinder block + full aluminum cylinder head Engine Oil Capacity 4.0–4.3L; factory-recommended 5W-30 / 5W-40 semi-synthetic or full synthetic oilFuel Grade 92# unleaded gasoline with wide fuel compatibility, supports LPG gas conversion Emission Standard Mainly China National V; a small number of revised versions meet China National VI aMaximum Thermal Efficiency 37.1%Total Engine Weight 143.5kg

III. Core Differences from the New SQRE4T15C

Torque Calibration: The 4T15B delivers base 210N·m with temporary 230N·m overboost; the 4T15C is factory-tuned for permanent 230N·m available as early as 1750rpm for stronger low-speed performance. Emission Adaptation: 4T15B complies with China National V / VI a; the 4T15C features optimized three-way catalytic converter and ECU calibration to satisfy China National VI b. Turbo Tuning: The 4T15B turbo spools fully at 2000rpm; the 4T15C delivers earlier turbo response with less lag. Electronic Control Program: The 4T15C optimizes cooling and fuel injection logic for slightly lower urban fuel consumption.

IV. Core Technical Highlights

Dual DVVT Intake & Exhaust Variable Valve Timing It synchronously adjusts intake and exhaust camshaft phases to boost turbo intake efficiency and reduce low-speed turbo lag at low revs, while increasing air intake volume at high revs for balanced launch and high-speed power output. The mechanically controlled wastegate turbo is durable and stable. The water-cooled intercooler lowers intake air temperature to suppress engine knocking and maintain consistent power output during long hill climbs. Reinforced Cast Iron Cylinder Block Superior to full-aluminum blocks in pressure and high-temperature resistance, it resists deformation under long-term full-load and mountain driving, greatly improving reliability as a turbocharged unit. MPI Multi-Point Port Injection Gasoline continuously flushes the intake manifold, nearly eliminating the common intake valve carbon buildup issue plaguing direct-injection engines. It allows longer maintenance intervals and broad fuel adaptability. Silent Timing Chain Abandons outdated timing belts with lifetime service-free operation, eliminating the high cost of timing kit replacement at 60,000 km. Optimized Integrated Cooling System Layered water channels inside the cylinder head and an independent turbo cooling circuit prevent overheating during traffic jams or prolonged heavy-load operation.

V. Full Vehicle Lineup Equipped with This Engine

Sedans Arrizo 5 1.5T, early China National V versions of Arrizo GX SUVs First-generation Tiggo 5x, 2016–2019 Tiggo 7, 2018–2019 1.5T Tiggo 8, early Jetour X70 models Transmission Matching Manual: 6-speed manual transmission (6MT) Automatic: CVT continuously variable transmission, 6-speed wet dual-clutch DCT

VI. Power and Fuel Consumption Performance

Power Characteristics Full turbo torque kicks in at 2000rpm, with weak low-end response below 1500rpm and mild lag on takeoff. The wide torque plateau from 2000 to 4000rpm delivers adequate power for daily overtaking and full-load hill climbing. Power fades noticeably at high revs, making it unsuitable for aggressive driving. In overboost mode, deep throttle input temporarily unlocks 230N·m for mild extra power during high-speed overtakes. Real-World Fuel Consumption Recorded by Owners Sedans (Arrizo 5 with 6MT): Combined 6.2–7.0L/100km; urban 7.8–9.2L, highway 5.9–6.6L SUVs (Tiggo 8 with CVT): Combined 7.4–8.3L/100km; urban 9.8–11.5L, highway 6.9–7.7L