Comparing the parameters of Haval’s 1.5T engine with Chery’s 1.5T engine, which currently has the highest thermal efficiency among Chinese brands, the 1.5T engine of MG 6, and the 1.5T engine used in Honda Civic, it is not difficult to see that Haval’s The book data of the new engine is close to or exceeds that of the Honda 1.5T. Of course, the specific power performance also depends on the performance of the gearbox. The results can only be reported to you after a test drive in a few days. Today we will only look at the structure.
In the future, in addition to replacing the existing old 1.5T engine code-named GW4G15B, this new 1.5T engine will coexist with the 1.3T engine in a short period of time, but the long-term plan is still to replace the 1.3T engine. In other words, this engine will become the main model of the Haval brand in the future. For red and blue-labeled models, the differences in hardware and software are minimal. Considering the product strategy, high-power tuned versions may be launched in the future for high-end models of the two car labels. This new 1.5T engine introduces an intake side lift control system, which is rare among Chinese brand engines of this level.
Compared with timing control, valve lift control can further reduce pumping loss when the engine is working. Official data shows that the maximum lift of this lift system is 8.64mm and the minimum lift is 0.8 mm. This enables it to take into account the requirements for air intake characteristics under different engine loads and working conditions. Tests during the development period showed that fuel consumption can be reduced by up to 8.4% under partial load conditions by adopting small lift and advancing the small lift phase. At the same time, in order to ensure the stability of the system, Haval established a new testing process and method for this system, which laid the foundation for the development of similar systems in the future.
In terms of fuel injection, it has changed from the previous manifold injection to the more mainstream in-cylinder direct injection. In order to optimize the atomization effect, the injection hole on the fuel injector is processed by laser drilling. , combined with the inlet shape design, promotes the formation of tumble flow, thereby achieving the goal of improving combustion efficiency. At the same time, in order to reduce abnormal noise caused by direct contact between the fuel injection system and the cylinder head during engine operation, the relevant parts adopt a non-contact suspension design.
This engine is built using a modular approach, so there was a plan for a 1.0T three-cylinder engine in the early stages of development. However, due to product positioning issues in the later period, we will not be able to see 1.0T three-cylinder products in a short period of time. .
☆ What will be launched soon is the National 5 emission standard. Engines that meet the National 6 emission standards will be launched in 2019.
☆ This 1.5T engine is currently produced by Haval’s Tianjin plant. In the future, as the number of models it is equipped with increases, it will be produced by the Xushui plant.
This new 1.5T engine that will be installed on the H6 adopts a modular development concept from the overall layout. From the details, the intake and exhaust valve variable timing systems, intake valve lift Process control, in-cylinder direct injection, electronically controlled pressure relief valves, high-pressure oil pumps, and NVH sound insulation materials on the oil rails all show that Great Wall is rapidly integrating with the international first-line level in powertrain research and development. Of course, the hardware structure is one thing, and software tuning is equally important. Due to space constraints, we were unable to experience it in depth this time. Friends who are interested in it may wish to continue to pay attention to the in-depth test drive session that will be held in a few days.