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[YesAuto Technology] The Correga, which has just confirmed the Chinese car name, will be the first domestically produced model Dongfeng Renault will bring to the Chinese market. This compact SUV model is positioned as a model of the Renault-Nissan alliance, like the Nissan Qashqai. Platform products. The strategic relationship between the two companies effectively integrates the resources of both parties. In this way, a lot of costs are saved in the product development process. In addition to sharing the chassis, the powertrain can also maximize its value. This time, Guangzhou The Renault booth at the auto show exhibited the 1.2T direct injection engine used in the Cabin and Correga.

Earlier, when we visited Nissan’s technology center in Japan, we saw a 1.2-liter supercharged engine. Although the displacement is the same, the HR12DDR engine uses a three-cylinder structure. This time we are at the auto show. The 1.2-liter turbocharged engine I saw is still the largest four-cylinder structure on the market.

According to Nissan’s engine naming rules, it’s not difficult to judge that this engine is the HR12DDT engine. In addition to the Renault models we mentioned at the beginning of the article, Nissan Qashqai, JUKE, Pulsar (equivalent to the domestically produced models that will be changed in March next year) Tiida) models are all using this engine.

1197mL is almost the lower limit of the displacement of a mass-produced four-cylinder gasoline engine (the Volkswagen 1.2T that has been put on the Chinese market has the same displacement of 1197mL). After catering to the development trend of small displacement, the power needs to rely on turbocharging. In order to better control the fuel efficiency and the working status of the cylinder, the fuel system adopts the in-cylinder direct injection technology.

This engine is at the same level as PSA's 1.2T in terms of technical configuration, which means that it is better than the 1.2T engine equipped with the SOHC valve train in the Golf and Beetle. What about the data?

1.2T engine data comparison
Renault 1.2T (Kelega) PSA 1.2T (Peugeot 408) Volkswagen 1.2T (Golf)
Displacement (mL) 1197 1199 1197
Number of cylinders (pcs) 4 3 4
Number of valves per cylinder (pcs) 4 4 2
Maximum horsepower (Ps/rpm) 131 (Qashqai 117Ps) 136/5500 110/5000
Maximum torque (N·m/rpm) 205 (Qashqai 190N·m) 230/1750-3500 200/2000-3500
Engine technology DOHC, intake and exhaust VVT DOHC, intake and exhaust VVT no
Ignition form Single cylinder independent ignition Single cylinder independent ignition Integrated ignition coil
Intake form Turbocharged Turbocharged Turbocharged
Fuel supply method Direct injection Direct injection Direct injection

Compared with traditional manifold injection, in-cylinder direct injection is more flexible in the control of the fuel injection strategy, which means that the fuel supply can be adjusted according to the working conditions and the injection timing and injection pressure. Of course, the temperature in the cylinder is too high. In order to avoid knocking, fuel is used to cool the cylinder. Therefore, the fuel used for cooling is wasted. This is a problem that all turbocharged engines face.

Edit summary:

Looking at it now, the alliance between Renault and Nissan is currently the most successful strategic alliance case in the automotive industry. The products built on the CMF platform by the two parties are gradually being introduced to the market, from Qijun to Qashqai, and then to Correga, the same technology platform Meet different market segments through different brands and different appearances, so that the integrated technical resources can be converted into market share and value to the greatest extent, and then invested in the next stage of development, in this way, this model Will be copied by more and more manufacturers.

This 1.2T direct injection engine is the powertrain shared by the two companies after the alliance. Although Renault’s strength in power development cannot be underestimated, Nissan also has a wealth of reserves in the field of power technology. Therefore, in Among the results of the cooperation between the two parties, the sharing of core components has allowed manufacturers developing products to focus on product planning, styling design and resource integration. With Dongfeng Renault’s production of Correga, this advantage will also be fully reflected in the Chinese market. . (Photo / Li Boxu, the home of the car)