Cylinder fuel injection surely we must be very familiar with, has now been adopted by many gasoline engines. Compared with conventional multi-point fuel injection engine, the injector direct injection technology that is placed in the cylinder combustion chamber, the fuel can be combustible mixture in a shorter period of time to form the air, while the fuel injection quantity can be based on different conditions precise control.
Because you can precisely control the amount of fuel injection and mixture is also easier to achieve the optimal concentration, direct fuel injection engine power, fuel economy are due to the traditional multi-point fuel injection engine.
- Variable valve lift and variable valve timing technology
THP series engines as well as on a major technical highlights that variable valve lift and variable valve timing technology. Judging from the literal meaning, this technology is divided into two areas, Citroen C4 Cartridge variable valve lift and variable valve timing, although they work principle is different, but the ultimate goal is to improve engine combustion performance, improve low-speed output parameters.
[Variable valve lift technology principle]
Wherein the variable valve lift by the variable valve mechanism technique servomotor to control the degree of opening of the valve, the valve opening angle is reduced when the engine is in a low power condition, thereby reducing fuel consumption. When the engine is high-speed operating conditions the valve opening angle is increased to the outbreak of a greater power output.
[Variable valve timing technology principle]
Variable valve timing technology we will not be unfamiliar, this technology has been used for many years in many engines. By installing a hydraulic device in front of the camshaft Camshaft (engine valve main body) to fine-tune the angle that can help produce different engine intake efficiency under different conditions. By adjusting the engine intake efficiency, it can be in any condition to ensure that the engine has the most appropriate mixture concentration, so as to achieve optimum combustion efficiency.
- Single twin-scroll turbocharger
As we all know, the engine's turbocharger need to rely on a turbine engine exhausts drive rotation, resulting in a greater intake pressure. But in the low speed range, the engine exhausts less, not enough to drive the turbine work. And when the engine speed reaches the turbine working range, it will instantly start generating turbine driving force. This creates a turbocharged engine turbo lag phenomenon exists in the small-displacement engine of this phenomenon is particularly evident.
In order to effectively alleviate the turbocharger lag problem, THP engine uses a single twin-scroll turbo technology. Compared to the general turbocharged engine, THP engine from one long, one short vortex tube connecting the two cylinders 1,3 and 2,4 cylinder respectively and simultaneously introduced into the turbocharger. This has the advantage that the scroll can be avoided both interfere with each other in the exhaust gas stream to reduce the resistance of the exhaust gas back pressure generated due to the work of the turbine can enter at a lower speed condition, in order to achieve the purpose of reducing the hysteresis of the turbine.
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