Chery SQRE4T15C Turbo DVVT Vehicle Engine Assembly 1.5L DOHC MPI Gasoline Engine

Full Introduction to Chery SQRE4T15C (1.5TCI DVVT China National VI b) Engine

I. Basic Background

The SQRE4T15C is a second-generation ACTECO 1.5-liter turbocharged multi-point fuel injection engine. It is a fully upgraded version of the SQRE4T15B that meets China National VI b emission standards. Mass installation on vehicles commenced in 2019. It is primarily fitted to family sedans, compact/midsize SUVs and entry-level Jetour models, and also serves as the range-extending power generator for Chery Kunpeng DHT plug-in hybrid systems. This engine adopts a cast iron cylinder block paired with an aluminum alloy cylinder head and MPI multi-point manifold port injection, without high-pressure direct injection. It features a simple mechanical structure, low carbon accumulation and affordable maintenance costs. It comes with an original factory warranty of 10 years / 1,000,000 kilometers, supports 92# unleaded gasoline and is compatible with LPG gas conversion. It is Chery’s high-volume mainstream 1.5T powertrain.

II. Core Technical Specifications

SQRE4T15C 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); equipped with external water-cooled intercooler and integrated exhaust manifold Maximum Power 115kW (156 hp) @ 5500rpm; maximum net power: 108kW Peak Torque 230N·m @ 1750–4000rpm (temporary overboost function canceled; full torque output under regular operating conditions) Timing Mechanism Silent timing chain; inspect chain elongation at 150,000 km, no mandatory replacement required Cylinder Block / Cylinder HeadHigh-strength cast iron cylinder block + full aluminum alloy cylinder head Engine Oil Capacity 4.0~4.3L; factory-recommended 5W-30/5W-40 semi-synthetic / full synthetic engine oil Fuel Grade 92# unleaded gasoline, compatible with LPG natural gas conversion Emission Standard China National VI b Peak Thermal Efficiency 37.1% Total Engine Weight 143.5kg Standard Supporting Configuration Automatic start-stop standard across all fitted models; compatible with fuel vehicles and DHT plug-in hybrid vehicles

III. Core Hardware & Calibration Differences from the Older SQRE4T15B

Significantly Optimized Torque Calibration SQRE4T15B: Base torque of 210N·m @ 2000–4000rpm; temporary overboost of 230N·m only available with deep throttle depression SQRE4T15C: Permanent 230N·m torque output available as early as 1750rpm, delivering stronger power for low-speed takeoff and hill climbing with reduced turbo lag Emission Standard Upgraded to China National VI b A new EGR exhaust gas recirculation system is added. The three-way catalytic converter, ECU fuel injection and cooling calibrations are optimized to meet the strict particulate matter and nitrogen oxide limits specified by China National VI b. Optimized Turbocharger, Intake and Exhaust Systems The low-inertia turbo impeller is recalibrated to build boost pressure earlier. The integrated exhaust manifold accelerates cold-engine warm-up, cutting fuel consumption and emissions during cold starts. Upgraded NVH Noise and Vibration Control The hydraulic dampers of the timing chain and hydraulic valve lifters are re-tuned to better suppress turbo noise and vibration at idle and low speeds. Optimized Cooling System Increased flow rate of the independent turbo cooling circuit reduces the risk of overheating during long-duration hill climbing and high-speed heavy-load driving. Optimized Electronic Control Logic Low-speed urban fuel injection strategy is optimized to slightly lower fuel consumption under congested traffic conditions.

IV. Core Technical Highlights

Dual DVVT Intake & Exhaust Variable Valve Timing It synchronously adjusts the phase of intake and exhaust camshafts to boost turbo intake efficiency at low 1750rpm and mitigate turbo lag. At high revs, intake air volume is increased to balance snappy takeoff response and sufficient high-speed power reserve. Independent Intercooler The mechanically controlled wastegate turbo features a stable and durable structure. The water-cooled intercooler continuously lowers intake air temperature to suppress engine knocking and maintain consistent power output during full-load long hill climbs. Reinforced Cast Iron Cylinder Block It delivers excellent compression resistance, high-temperature tolerance and deformation resistance, suffering minimal wear under long-term full-load mountain driving and commercial gas conversion conditions. Its reliability as a turbocharged engine far outperforms full-aluminum cylinder blocks. MPI Multi-Point Manifold Port Injection Gasoline continuously flushes the intake manifolds and intake valves, eliminating the persistent intake valve carbon buildup issue common to direct-injection engines. Only regular throttle valve cleaning is required, bringing lower maintenance costs and broader fuel compatibility. Integrated Exhaust Manifold Exhaust passages are integrated into the cylinder head for fast cold-start warm-up, shortening engine heat-up time and reducing cold-engine fuel consumption and tailpipe emissions. Silent Timing Chain It abandons outdated timing belts and requires no replacement throughout its service life, eliminating the substantial expense of timing kit replacement at 60,000 km and cutting long-term maintenance costs. EGR Exhaust Gas Recirculation It lowers peak combustion temperature to reduce NOx emissions for compliance with China National VI b standards, while moderately improving fuel economy.

V. Full Lineup of Equipped Vehicles

Chery Sedans National VI 1.5T Arrizo GX, 1.5T Arrizo 5 PLUS Chery SUVs 1.5T Tiggo 5x, Tiggo 7 / Tiggo 7 PLUS, 1.5T fuel version of Tiggo 8, entry-level 1.5T OMODA 5 All Jetour Models 1.5T fuel versions of Jetour X70/X70M/X90 Hybrid Supporting Applications Tiggo 7 PLUS New Energy, Tiggo 8 PRO Kunpeng e+ DHT Plug-in Hybrid (deployed as a range-extending generator engine) Transmission Matching Manual: 6-speed manual transmission (6MT) Automatic: CVT continuously variable transmission, 6-speed wet DCT, 7DCT300 wet dual-clutch transmission

VI. Power and Fuel Consumption Performance

Power Characteristics Full 230N·m torque is delivered at only 1750rpm. Its low-speed torque output below 1500rpm is noticeably stronger than that of the SQRE4T15B, with barely perceptible lag during takeoff and low-speed overtaking. The wide torque plateau spanning 1750–4000rpm provides ample power reserve for full-load family driving, hill climbing and high-speed re-acceleration. Power output fades markedly above 5000rpm, making it unsuitable for aggressive driving. The 6MT manual transmission delivers low power loss for more responsive acceleration; the CVT offers smooth, gentle driving with lower cruising RPM at highway speeds; the wet DCT features faster shift response. Real-World Fuel Consumption Recorded by Vehicle Owners Sedans (Arrizo GX with CVT): Combined 6.3~7.1L/100km; urban 7.9~9.3L, highway 6.0~6.7L SUVs (Tiggo 8 with 7DCT): Combined 7.3~8.2L/100km; urban 9.7~11.3L, highway 6.8~7.6L