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Chinese jet engines: they have one big problem!

The Chinese are actively promoting our market cars with turbo engines. Expert “Behind the wheel” compared to the development of designers from China, Geely is installed on the Atlas and Haval F7, and find out what their weak spots.Alexey Revin “driving”Expert

Automakers mostly try as long as possible to keep the engine in the Russian lineup atmosferici — the demand is good. Sometimes even strike low-capacity turbo engines, replacing them with naturally aspirated units greater cubic capacity. For example not far to seek — on the crossover Hyundai Tucson, which became a member of the comparative test published in the September issue of the magazine “Behind the wheel”, equipped with the engine 1.6 T‑GDi direct-injection and turbocharging. The days of this engine in our market are numbered — it will be aspirated 2.4 GDi with comparable power. The same reshuffle recently made a firm Kia.

The Chinese, on the contrary, actively promote to our market turbo. Geely Atlas in the spring got a new turbo engine capacity of 1.8 liters. In the range of crossover Haval F7 — only supercharged units: 1.5 2.0 GDIT and GDIT. Maybe the Chinese know a secret? Get to know these motors better.

Motor for the Atlas were not created in a vacuum. He was the progenitor, the engine JL4G18TD, known to Russian buyers for the sedan Geely Emgrand GT. New engine JLE‑4G18TD the Chinese themselves did, but obviously not without the help of minders Volvo, which is owned by Chinese giant. Added variable valve timing on the release, we have optimized the workflow engine 21 HP more powerful than its predecessor, torque has increased to 35 N∙m, and his regiment became broader: 1500-4000 Rev/min.

HavalHaval

GeelyGeely

Portrait engine Atlas contains features of most four cylinder motors with direct fuel injection and turbocharging. The system of variable valve timing DVVT (inlet and outlet), two balancer shaft to reduce vibration. Blade oil variable displacement pump provides lubrication parts at low engine speed and saves fuel, not taking extra power at high revs. Double layer exhaust manifold with integrated relief valve reduces heat loss, thereby increasing the efficiency of the turbocharger. Interesting solution – the coolant pump, which is mounted on the cylinder block side and is driven by a separate belt from the rear end of the balancer shaft, and the exhaust valves are hollow, filled with liquid sodium for better cooling.

Two-liter engine mounted on a test Hawale F7, Nadal slightly on the heavier models of the concern Great Wall it is removed a lot more than 200 forces. Perhaps that is why the regiment torque it more than the motor of the Atlas, which affects the driving characteristics in certain modes.

Design chabalowski 2.0 GDIT is similar to the motor Geely. Nothing outstanding: turbocharging, direct injection, controlled valve timing on intake and exhaust, balance shafts. But the motor is 1.5 GDIT is more advanced. For example, the CVVL system controls the duration of opening and the height of lift of the intake valves, which improves efficiency and power. Optimum operating temperature in the engine is provided with two thermostat serving the cylinder block and the cylinder head. By the way, this motor is developed independently by a division of Great Wall Motors. In the process, the company has applied for 91 patent.

Entertaining facts you can fish, digging in the rules of the service operations. Both manufacturers instruct you to change the oil every 10,000 km And it is justified, especially if the machine is operated in severe conditions of the Russian cities. But to change the spark plugs on the Atlas every 20,000 miles or fuel filter F7 for 10,000 km?! And it is not only the consumables, which are subject to such frequent replacement. Maintenance of such cars can be costly!

  • What engines (those that have sold) most reliable and long-lived? A rating of “Behind the wheel”, which contains most damage tolerant design of our time, you will find at this link.

Photos: manufacturers

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