Does the new model fit? From the aspects of fuel consumption, safety performance, operability and maintainability, etc.

The day before yesterday, I used the unit Fit 1.3, which is well-deserved for its fuel economy. Curious data collection began to daydream, summarized as follows:

Fit 1 Engine with the following technology of 3 saves fuel.

1 is obtained by high compression ratio (10. 5) It provides a large torque output at a relatively low speed, and the maximum torque at 2800 rpm is 128N, so that the high gear reduction ratio of the gearbox can be designed to be smaller. The fifth speed is 100 yards, and the engine speed is just over 2000 revolutions. The number of cylinder fuel supply and ignition times per unit time is obviously less than that of other vehicles. Moreover, the biggest advantage of doing this is that the power stroke time is sufficient, and the fuel is discharged after it is fully and completely burned, which has drained the energy (some senior fans say that the engine burns well at high speed, nonsense! Combustion is an oxidation reaction. I don't believe that the shorter the reaction time, the more thorough the reaction will be. At most, the engine has a good purging effect and does not like carbon deposition. In addition, many car fans say that low-speed combustion is not good, which is only caused by high oil and gas concentration under the condition of high-grade acceleration and heavy stepping on the accelerator. It is another kind, close to the off-duty state. Therefore, the emission of Fit has easily passed the national standard.

2. The design of single cylinder and double spark plugs is adopted to provide better combustion speed efficiency, and also to eliminate the characteristics of long-term low engine speed, poor cylinder purging effect and easy carbon deposition. At the same time, it is also the main reason why the engine is still dual-valve (two spark plug holes, plus valve holes, the cylinder head needs too many holes, almost a sieve)

3。 I-DSI intelligent double spark plug sequential ignition system ensures that the engine is the best economic combustion in all speed ranges.

I see that the linearity of power operation curves of many engines is very poor and very curved. Honda controls intake at different speeds by changing intake manifold and valve lift. It ensures the best combustion linearity of the engine at all speeds. For example, the valve stroke (opening) of many engines is fixed at both high speed and standby speed. If the valve stroke (adjustment) is low, it will save fuel when working at the standby speed (when waiting for the speed, the valve can only be opened a little, and the valve action can only slightly resist the valve spring), but when it is necessary to turn on a large load, there will definitely be insufficient oil and gas, leading to power failure; On the other hand, if the valve stroke (adjustment) is high (the valve action is opposite to the depth of the valve spring), the power will increase, but a lot of oil will be consumed when parking (the valve action depth is opposite to the depth of the valve spring, which consumes a lot of energy). If you always run a red light, it will be painful enough. Honda's VTEC (the same is true of Toyota's VVT-i, and modern cVVT can only solve the former but not the latter) has solved this problem. It can be said that the fuel supply of the engine with a waiting time is probably the same as that of QQ308. Finally, it should be mentioned that the Fit is not only the fuel-saving design of the engine, but also the tire width of 165 is a fuel-saving means (but the effect of sedan 1.4 Polo 165 is not as good as Fit).

Because the Fit engine has the above characteristics, the combustion efficiency is the same at all speeds, that is! In a wider speed range, it is all its economic speed, so although the Fit is still 1.05 tons, its economic fuel consumption and comprehensive fuel consumption are the closest domestic cars except Prius. All the above are my analysis of engine technology from a physical point of view, without any professional ingredients! ! That's not why! !