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It is very common for automobile manufacturers to jointly create products. Under the general trend, the current domestic mainstream 1.5T gold displacement engine technology, Mercedes-Benz is even more extreme and tunes the 1.3T small-displacement M282 four-cylinder engine into two types of 136Ps and 163Ps.
This M282 is a inline four-cylinder gasoline engine put into production by Mercedes-Benz in 2018. It has been localized in 2019. Let's take a look at the M282. What models are the
M282 engine equipped with:
M282 engine is launched in China in 2019, the specific engine number is M282 914, and the models are Mercedes-Benz B-class , Mercedes-Benz A-class (imported), Mercedes-Benz GLA, Mercedes-Benz CLA-class , Mercedes-Benz GLB, Mercedes-Benz A-class these six car series.
M282 engine has a displacement of 1,332cc (same as Campro1.3) mainly to replace Mercedes-Benz's original M270 DE16 engine, M282 914 has different outputs on different models (models listed in China) are 136 Ps and 163 Ps. Compared with the old 1.6T engine, the displacement of
is reduced by about 300cc, but the engine power is not inferior, which is 7Ps higher than before.
Learn more about the parameters of the M282 914 engine:
M282 has a cylinder diameter of 72.2 mm, a stroke of 85 mm, a 3-stroke of 81.3 mm, and a compression ratio of 10.6:1. At first glance, it is a typical model that emphasizes low torque, so why do some people What about calling it 1.33T?
Through the vehicle factory nameplate, we can see that the exact displacement of the M282 914 is 1332cc, which is about 1.33 liters, so strictly speaking, it should be called 1.33T.
This 1.3T four-cylinder engine platform has different names in different companies: Mercedes-Benz internal code name is M282; Renault is called TCe115, TCe130, TCe140, TCe160 according to different tuning; Nissan calls it HR13DDT.
Beijing Mercedes-Benz
Although Renault-Nissan and Mercedes-Benz share this engine platform, it does not mean that these engines are exactly the same, because the engine production lines of the two groups are completely separate, but the design drawings and design principles are the same, and other manufacturing details It is completely different from the tuning of the vehicle.
M282 The relationship between the 914 engine and the Renault-Nissan alliance:
Mercedes-Benz's traditional technical advantage lies in high-performance large-displacement engines, such as: Mercedes-Benz's V12, V8 and AMG's high-performance engines are industry benchmarks, but in the international electrification Under the technological trend, engine miniaturization has gradually become the mainstream.
But for entry-level products with smaller displacement, Mercedes-Benz does not seem to want to spend too much energy in the direction of internal combustion engines, but rather hopes to complete research and development through cooperation, and Mercedes-Benz will mainly focus on the development of electrification.
The Daimler Group to which the Mercedes-Benz brand belongs and the Renault-Nissan Group established a three-party alliance in 2010 that holds a small share of each other, and carried out a series of technical cooperation, such as the Q50 of Infiniti and the Q30 of Mercedes-Benz. X Class pickup and other projects, Mercedes-Benz M282 engine is only part of their recent projects. The unique technology of
M282 914 engine:
1.3T The horizontally mounted inline four-cylinder small-displacement engine adopts: variable valve lift, DOHC (double overhead camshaft), direct injection in the cylinder, partially integrated Exhaust manifold , electronically controlled turbo, active cylinder closing, technology of Ares VR38DETT (so that the engine does not use cylinder liner) and other technologies.
Mercedes-Benz M282 engine is a new engine jointly developed by Daimler and Renault-Nissan Alliance, and has been used in a large number of Mercedes-Benz, Renault and Nissan models.
M282 Active cylinder closing technology of 914 engine:
Active cylinder closing technology is not felt in daily driving. Under high-speed cruising or under low load conditions, the engine will automatically turn into two-cylinder work, and then step on the accelerator The engine can also work at full load quickly, and the power connection is smooth during the acceleration process.
In the load range of 1250-3800 rpm, the engine will actively close the intake valve and exhaust valve of the 2nd and 3rd cylinders according to the working conditions, and stop the fuel injection at the same time to improve the fuel economy. Active cylinder closing technology has long been available. , but it is the first time for Mercedes-Benz to use it on an inline four-cylinder engine.
Regrettably, the active cylinder closing technology was castrated on the domestic M282.
M282 "Triangular" cylinder head of the 914 engine:
The new "triangular" cylinder head design is very special. Renault is responsible for the development of the cylinder block and the following parts, while Daimler is responsible for the cylinder head and the intake and exhaust system.
The key to this design is to achieve a large slope of the inner flange surface of the engine, compensated internal valve clearance, minimum camshaft distance, optimized gas route from intake to turbocharger, and partially integrated exhaust. Air manifold, efficient cooling, central injection.
The central area of the triangular structure can improve the rigidity and strength of the entire cylinder head , and at the same time save about 3 kg of mass compared with the conventional cylinder head.
Part of the exhaust manifold is integrated in the cylinder head, which helps to heat the water temperature. At the same time, the path length of the exhaust gas is shortened, and the exhaust gas can reach the turbine faster, so that the hysteresis of the turbine is improved, and the engine's hysteresis is improved. Startup heat up and high load cooling issues have been resolved.
Due to the extremely light weight of the triangular cylinder head, the more popular IEM technology is not adopted at present. At present, the triangular cylinder head of the M282 achieves more uniform oil and gas mixing, lighter engine weight, and more energy-saving during vehicle driving. Cooling circuit technology of
M282 914 engine:
cooling circuit is designed according to the requirements of engine combustion, emission and work friction.
According to the working state, the engine can heat the coolant through combustion and work friction; When the engine is under high load, the coolant can also cool the exhaust manifold of the vehicle. When the exhaust temperature decreases , the pollutant content in the exhaust gas will be significantly reduced, which will help the engine meet the more stringent China VI environmental protection regulations.
The triangular cylinder head design of Mercedes-Benz makes the layout of the engine more compact. The exhaust manifold is integrated in the cylinder head, and the heat emitted by the exhaust manifold and the cylinder block is used to heat the water temperature together, so the warm-up time will be greatly shortened and reduced. Fuel consumption at cold start.
Cooling circuit diagram
Description of components in the cooling circuit diagram: . Coolant expansion vessel; 2. Coolant pump; 3. Crankcase; 4. Turbocharger; 5. Changeover valve; 6. Coolant circulation pump; 7. Heating system heat exchanger ; 8. Coolant thermostat ; 9. Double clutch transmission; 10. Engine oil heat exchanger; 11. Transmission cooling system low temperature circuit coolant circulating pump ; 12. Radiator; 13. Check Valve; A. Warm Coolant (Engine Cooling Circuit); B. Engine Cooling Circuit Filling Line; C. Transmission Cooling System Low Temperature Circuit; D. Engine Cooling Circuit Ventilation; E. Coolant (Engine Cooling Circuit) cooling circuit).
M282 914 engine without cylinder liner + Nanoslide cylinder hole coating technology:
No cylinder liner technology is learned from Nissan Ares VR38DETT engine; Nanoslide cylinder hole coating technology is the technology of Mercedes-Benz all-aluminum engine.
This M282 engine cancels the traditional iron cylinder liner design, and sprays iron-based coating on the aluminum cylinder bore to replace the cylinder liner. The thickness of this coating is only 0.2-0.3mm, which can achieve low friction and light weight (conventional cylinders) The thickness of the sleeve is at least 2mm), which is very beneficial to the heat dissipation of the cylinder hole.
Because it is a shared platform between Mercedes-Benz and Renault-Nissan, the technology is called differently on the Internet. Mercedes-Benz calls the technology Nanoslide, and Nissan calls it mirror coating: Mirror bore coating.
M282 914 double overhead camshaft technology:
uses two camshafts to drive the intake valve and the exhaust valve respectively, so the double convex will be "more labor-saving" than the single convex in terms of physical effect. There is no technology between them. Good or bad, it's just that the biconvex structure is more complicated than the monoconvex one.
The double overhead camshaft DOHC technology is used to realize the driving effect of low fuel and high output under low power. High pressure direct injection fuel system of
M282 914 engine: injector mounting hole of
M282 engine is located at the apex position of triangular cylinder head, injector is located in the center of combustion chamber, can adjust and control the injection time, fuel injection The nozzle adopts a 6-hole design, and the can spray at high pressure without worrying about the problem of wet walls.
The fuel injector adopts a 6-hole design. The main body of the fuel injected by the
will surround the spark plug . During the compression stroke, there will be a more ideal evaporation efficiency, and the wet wall part can also evaporate and participate in the combustion synchronously.
The fuel injector
So this machine uses the triangular cylinder head to ensure the anti-knock ability during rapid combustion, and the smaller displacement can achieve the performance of high torque output, successfully overcome the miniaturization of supercharged direct injection International problems such as super knock, oil dilution, and performance degradation that engines face.
However, the fuel injection pressure of this M282 engine is a 250bar system, not the most advanced 350bar system in the current domestic market . High injection pressure is good for reducing emissions.
M282 914 engine crankcase lightweight design:
The crankcase of this engine adopts a "cylinder top leak" design, using die-casting aluminum process (GD-AISi9Cu3), M282 continuous drag reduction components are based on double-wire arc spray coating In addition to reducing friction, lightweight cylinder coating is also an advantage of innovative cylinder technology.
Because of this technology, the displacement has been reduced by about 16%, so compared with the old M270 engine, the mass of the crankcase has been reduced by about 5 kg.
also uses oil with low friction coefficient, which reduces the CO2 emission of the engine.
M282 Electronically controlled turbine of 914 engine:
This 1.3T engine adopts a turbocharger with electronically controlled waste valve , which is a technical measure to pre-compress the air and then supply it into the cylinder. The density of the intake air increases the intake air volume, so that the power of the engine can be increased.
Practice has proved that after the supercharging technology is adopted in the automobile engine, not only good power performance can be obtained, but also the fuel economy can be improved.
Engineers merged the 2/3 cylinder exhaust port exits before entering the supercharger , which makes the supercharger arrangement very compact, making this engine look like a three-cylinder from the exhaust side of the cylinder head Cylinder engine, in fact, it is an authentic 4-cylinder engine. Comparison of
M282 914 engine with BMW and Audi Volkswagen:
M282's has a maximum power of 4120kW and a peak torque of 250Nm, compared with BBA's other two BMW B38 1.5T three-cylinder engines and Audi's 1.4T EA211, the displacement of this M282 The smallest, but the highest performance.Is there a fatal problem with the
M282 914 engine?
In terms of consumer complaints, there are no serious design defects in the models of 2019-2020-2021 models. The most dissatisfying parts of this model are still the resonance and noise problems. Other vehicles There are leaks around the turbocharger, engine side cover leaks, and oil seal leaks.
Although these problems are small, it shows that Mercedes-Benz's craftsmanship is not very refined. Small displacement achieves high-power output. Too high in-cylinder pressure will inevitably lead to leakage of the sealing gasket in the engine. Therefore, the engine with excellent test data There is no guarantee that there will be any problems when applied to real vehicles.
At present, the M282 914 engine has been tested in the market for three years. How do you choose 1.3T? In terms of price, you should refer to the market reputation. Now you must know best.
Mercedes-Benz A-Class
Mercedes-Benz GLB
Mercedes-Benz CLA-Class
Mercedes-Benz GLA
Mercedes-Benz A-Class (imported)
Mercedes-Benz B-Class
Summary
We consumers need to admit that the Mercedes-Benz M282 1.3T engine is a relatively good product, which meets the emission requirements At the same time, it has also tried not to compromise on performance; however, for Mercedes-Benz's 1.3T, combined with the price of the model, everyone seems to have not fully agreed.
is not unacceptable for a small-displacement turbocharged engine. What we cannot accept is a luxury car with a price of 300,000 equipped with a 1.3T engine. No matter how high the core technology of the M282 914 engine is, the small displacement is not cost-effective after all. It takes an extra 150,000 to buy the brand value, which is not something everyone can do.
