sharp rise in oil prices, fuel consumption more and more attention of the era, almost all models are equipped with the “Eco” energy-saving mode, trying to reduce vehicle fuel consumption. Eco-Mode can really be fuel-efficient it? That ugly point, Eco mode is not a scam, right?
In general, Eco mode from the throttle, gearbox and turbo three dimensions of a vehicle to help the driver achieve fuel-efficient purpose. Although not a lot of things can change, it can be based on different logical thinking different manufacturers, but also can be composed of a variety of fuel-efficient logic. Let us first look at what works in three dimensions, respectively, yes.
When the driver turned Eco mode, the throttle valve becomes smaller and the sensitivity of the vehicle, the foot of the driver at this time due to instability throttle caused by trembling or extra turn will be substantially reduced. At the same time the need to achieve the same horsepower throttle depth will also increase, such as the original 20 percent throttle depth percentage can burst out of 20 horsepower, so after opening Eco mode, the throttle same depth may only burst out of the 10 percent power.
but also reduce throttle sensitivity is not entirely without benefit, thanks to the acceleration of the vehicle will be more Guadan sensory experience, as well as being significantly filtered out of the driver’s foot subtle movements , so for car passengers, Eco mode driving experience is supposed to be better.
of the last century turbocharged model in the 1990s, when reaching the turbine rotation speed from the pressure, the turbine will have been involved in the work. So more air will enter the cylinder, nozzle spray is bound to have more oil mixed with air, air-fuel ratio to ensure normal, but fuel consumption will increase.
Now the turbo models, thanks to the discharge end of the electrically controlled bypass valve is present, even when the amount of exhaust gas from the pressure enough to drive the turbine, the exhaust electrically controlled inlet end of the bypass valve may be an exhaust gas through the turbine, without directly discharging outside the vehicle. In this way we avoid the vortexPressure from the rear wheels, too much air into the engine passive, ultimately resulting in unnecessary fuel injection.
Therefore, when the driver opens the Eco mode, in addition to throttle response becomes slow, requires deeper than the depth of depression, the computer will be based on the driver’s accelerator opening, vehicle speed and load, determines whether to allow pressure from the turbine. If at this time the power driver’s request is not, the computer will make the bypass valve electrically controlled by the exhaust gas discharged directly without passing through the turbine engine so as not to give extra air pressure, maintaining the vehicle naturally aspirated state to achieve fuel economy. Until when the driver presses the accelerator pedal to 50% or more, the bypass valve will provide an exhaust gas turbocharger to increase the power of the vehicle.
In order to achieve fuel-efficient purpose, manufacturers will change the gearbox program automatic models in Eco mode. It is common practice to open when the Eco mode, the transmission will be guaranteed in the case where the vehicle speed to maintain existing priority gear to increase engine speed is reduced, so as to achieve the effect of fuel economy. Meanwhile, in the past triggered throttle downshift logic depth will also be calibrated deeper, reduce the possibility of transmission downshifts.
is more like the BMW will be the same, will be cut to neutral Eco Pro mode to set a glide. We all know that no matter what driving mode under normal circumstances, when the driver releases the accelerator, the vehicle will be with a sliding block, and the use of the wheel cylinder to drive the reaction force, so that it is completed without injection of inspiration, the compression and exhaust operation, sliding so as to achieve the effect of fuel consumption 0L / 100km but the drawback is the sliding distance may be relatively short.
BMW seems to be, this is clearly not enough “Eco”, so be coasting when BMW opened Eco Pro mode and then, the vehicle will be switched directly to the gearbox into neutral, in exchange for the furthest gliding distance. At this point the engine due to the lack of external aid, will maintain the idle fuel injection began, so as to ensure the normal operation of electrical equipment. So BMW’s Eco Pro mode, although you can slide farther, but if it is a short taxi when everyday driving, but not as good with a block is more fuel-efficient.
In addition to adjusting the throttle, and a turbine outer gearbox, there are some models in the open Eco mode, the automotive power will be adjusted. For example a suitable reducing capacity of the compressor, closing the rear window and mirror heating, air conditioning to reduce the wind speed and the like, so as to achieve energy-saving effect. While the car, saving energy nature may consume less electric motor gasoline powered, thus, inevitably it will reduce fuel consumption.
In summary, when you open the Eco mode, the state of the vehicle becomes the logic: First, the throttle pedal would be the first intervention by, followed by gearbox detected throttle opening is intervention, it will upshift and downshift timing delayed. The turbine bypass valve is also fully opened, so that the exhaust gas flows directly into the exhaust pipe, to avoid increasing fuel consumption of the turbine work. At this time the vehicle will be able to work in a satisfying basic acceleration and cruising state, so as to ensure fuel economy is maximized.
finished several dimensions Eco mode, it took such a long time effort, Eco mode can actually help in actual use fuel-efficient driver do? In fact, the results are not certain.
If in congested traffic, Eco mode due to the throttle opening degree is reduced, and a turbine positive upshift transmission is not involved, save indeed may be slightly some fuel. However, weak acceleration, speed is too slow and other issues will follow, and good traffic jams we usually do not require very rapid speed, so use Eco mode in congested traffic does not make either fuel-efficient driving experience becomes worse .
can be if it is relatively smooth road traffic lights, it will definitely order not to affect traffic efficiency, using a larger throttle opening so that the vehicle speed. Then open the Eco mode, it will affect the acceleration performance of the vehicle, the driver depresses some will be more natural accelerator, which triggers a downshift, start the turbine, increasing the amount of fuel injection and other operations, then this time, not only Eco mode It will be fuel-efficient, but also make the driving experience becomes worse.
And when it comes to Eco mode best suited to the open state, it is definitely more vehicles in the fast road or a smooth state. Because in this state, if only the right to go cruising, then, with the ups and downs of the road, there will always be part of the power is superfluous. At this time, if the Eco mode is turned on, the ECU will automatically determine how much power the current traveling resistance needs to maintain balance, and adjust the transmission, the accelerator opening degree and the three dimensions of the turbine, so that the power output by the vehicle speed just to sustain the current . Therefore, in a state of constant speed or a slight shift, Eco model is the best, and most fuel-efficient.
Finally, high-speed look at the road, which is fixed on the vehicle speed 120km / h, Eco mode is useful. If you drive a small-displacement turbocharged models, and high-speed open Eco mode, it does not intervene in the case of the turbine, simply by virtue of displacement engine self-absorption of work, a high probability that there will be even less motivated out of the vehicle speed Case. As a result, you had to deepen the depth of the accelerator pedal is stepped on, can this way, Eco mode is disabled meaning turbine intervention ceased to exist, but might as well not open economic model more happy. Of course, if you are “organ feet” then the other said.
But if you drive a 2.0T basis of this displacement of more than 2.0L, turbo engine does not require the intervention will be able to maintain the 120km / h cruise models, then open Eco mode, you can avoid the long-distance running, leg shaking meaningless throttle changes brought about in order to achieve fuel economy results.
In fact, Eco mode and we do not think is so easy to use, because it appears more to fuel consumption tests. When you are traveling the same road with the test environment, Eco mode will help you save oil money, such as congested city roads and smooth expressway. But if your traffic. “Chaogang”, then the Eco model not only has no effect, but will also make your driving experience becomes worse, and this is obviously a bit more harm than good.
to see this we should also understand, Eco mode, in fact,And other modes sport, sand, etc., can only be obtained in individual scenes good experience, if used improperly, not only ineffective, or even counterproductive. So, we must understand that any mode, the driver is required by virtue of their own experience and knowledge divide periods open.
you usually prescribe Eco model?