Christophe wrote:[...] Because hybrid technology will only be able to compensate very little for the biggest defect in reciprocating engines: a very variable efficiency depending on the speed / load.
Well ... this is where in my opinion you are wrong ... Or else you have not followed the latest concepts (and the explanations I have given ...). I have the impression from what you say, that you only take into account the parallel hybrids.
Indeed, on a series hybrid (or a VE with range extender, it's the same ...), the heat engine is only used in the conditions where it is most efficient, ie heavy load and constant regime, the regime of least specific consumption.
Christophe wrote:[...] So instead of playing the top (ie by doing downsizing, in my opinion the only econological solution because it allows to operate the engine where it is the least worse) the manufacturer prefer s fun making more powerful hybrids by adding electric assistants that don't will never compensate (econologically speaking) and as much as downsizing the defect of bases of the engines quoted above ...
Well, that's already a bit of what is done since, even in existing hybrids (parallel), the engine is smaller and less powerful than the level of performance to which the car claims.
In addition, a downsized motor always has to face transient speeds and variable loads, even if this phenomenon of load variation is less frequent.
Christophe wrote:[...] At speed stabilized on road and motorway the gain of the hybrids is almost NULL compared to the Hdi ...
I do not know ... It would be necessary to see if for example for PSA hybdrides, the fact of using the 90 hp version of the 1.6 l engine brings something compared to the 110 hp version which is the performance benchmark to be achieved.
In addition, it seems to me all the same that for a given mass and aerodynamics, one cannot indefinitely lower consumption at steady speed on the highway, right?
Finally, if your downsized engine is too weak, you leave the favorable range so you consume more on the highway than with a more vigorous engine (this is the case of the Dacia Logan MCV dCi)
Christophe wrote:[...] The current hybridization thus consists in increasing the power of the thermal engine and NOT on the contrary the downsizer ...
Well, I don't think so, no. Since these models are supposed to be more upscale, their engine is actually smaller than the competitors ...
However, they are not entirely dedicated to fuel economy.
Christophe wrote:[...] When the constructor will offer an urban and peri-urban hybrid of 30 to 40 Hp then we will talk about it again. But that does NOT seem to be the current policy! And not even scheduled in the program ... Am I wrong?
What do you know about that ? Are you soothsayer?
In addition, the Cleanova could meet this definition, with a 15 kW thermal engine and an electric of 35 kW.
Christophe wrote:A) Arf ... I already talked about it and I thought you knew my position on the subject. This is a global CO2 reasoning in relation to this technology. I will re-explain the 1st dash with a practical example:
1) A Prius costs roughly € 10 more than a car of the same class in Hdi.
2) To obtain these 10 000 € the buyer will have to work more.
3) For example if the buyer can save we will say 1000 € per month (which can be done by most Prius buyers I suppose ...), it will take 10 months of work PLUS to pay for the car.
4) These 10 months of work cost doubly in CO2: the work-dodo journey and the rejections of the buyer's work.
Obviously it is very difficult to estimate this CO2 cost (especially for work where it depends on the sector of activity but there are CO2 emissions / € GDP for each country) so let's just estimate on the routes:
- 30 km per day (low average for Paris I suppose)
- 21 working days per month
- km covered in 10 months: 6300 km.
So if the Prius allows a saving of 30% compared to its old vehicle, just on this criterion (professional journey), it will have to be 6300 / 0,3 = 21 km before WINNING THE LOWEST GRAM OF CO000.
Whoa!
Isn't that a bit far fetched from this theory?
I don't frankly agree but hey ...
Christophe wrote:B) In terms of reliability, we do not have enough perspective to discuss it objectively but it is a safe bet that it is not as good as non-hybrid vehicles ... And all this has a CO2 cost. ..
Compared to a downsized engine, I'm not really sure ... Did you see the complexity of VW's TSI for example?
In addition, you base yourself once again on parallel hybrids, whereas series hybrids do not have to manage complicated parameters on the heat engine. We already talked about it with Targol in a discussion about hybrids and I asked a question that never got answered.
Christophe wrote:Besides the Prius, what hybrid consumer model is planned for the market soon?
CONCLUSION: hybridization does not seem to me the right voice econologically speaking ... and Loremo will be much more econological than any hybrid ... I hate ...
For your question, I do not know .. Maybe PSA, but they seem to me far too cautious.
In addition, (and I will clarify right away that I like the LOREMO concept a lot, so that some sorrowful spirit can not blame me later), I think you do not realize that the LOREMO is going ask for a real "philosophical" commitment on the part of its buyers.
It is a car which is tiny, which is very light (therefore which will be sensitive to the load) and which will not be able at all to render the services which MrToulemonde expects from his car today.
Conversely, the strength of a current hybrid is that it is completely "invisible" to its user ...
I'm not saying it's good, I'm saying it's like that, for now ...
Finally, and these are aspects that you have completely overlooked, a vehicle with an internal combustion engine alone can neither recover the energy from braking and deceleration (slopes), nor drive in ZEV mode, which will eventually be the norm for the future in city centers.