Όταν ξανακάνεις την διαδρομή βάλε το 68 ίππων μπροστά με το tCe πίσω να έχετε τον ίδιο ρυθμό και μέτρησε την κατανάλωση.
Σίγουρα καίει παραπάνω το βενζινοκίνητο αλλά η διαφορά δεν θα αυξηθεί.
Κατανάλωση καυσίμου
http://en.wikipedia.org/wiki/Diesel_engine#Fuel_economy
*While a higher compression ratio is helpful in raising efficiency, diesel engines are much more efficient than gasoline (petrol) engines when at low power and at engine idle. Unlike the petrol engine, diesels lack a butterfly valve (throttle) in the inlet system, which closes at idle. This creates parasitic loss and destruction of availability of the incoming air, reducing the efficiency of petrol engines at idle. In many applications, such as marine, agriculture, and railways, diesels are left idling and unattended for many hours, sometimes even days. *
Σημαντικά καλύτερη κατανάλωση των πετρελαιοκίνητων μέσα στην πόλη (ρελαντί και χαμηλά φορτία).
Σχολιασμός κατανάλωσης διαφόρων ειδών καυσίμου.
http://www.theaa.com/motoring_advice/car-buyers-guide/cbg_fuel.html
*Diesel with DPF
We used to recommend a diesel engine for frequent short journeys as the engine works more efficiently earlier in the journey. Now though, the fitting of diesel particulate filters (DPF) means that diesel vehicles need regular long runs, some of which must be at high engine speed to clean (regenerate) the filter.
Lean burn petrol
Petrol engine emissions have to be reduced too.
Some manufacturers are adopting 'lean burn' in conjunction with direct injection fuel systems (the petrol is injected into the cylinders rather than being mixed with the air in the inlet manifold) to achieve improvements in fuel economy.
The higher temperatures at which these very lean mixtures burn results in more oxides of nitrogen so car manufacturers may have to fit nitrogen oxide (NOx) traps.
At high and mid-range engine speeds, these engines run very lean, using less fuel so direct injection engines are ideal for motorway runs, but much less suitable if the car is predominantly used in town.
At lower vehicle speeds the mixture returns to normal and cannot make use of the lean burn technology so there will be no fuel consumption advantage from this more complex and expensive system if most of your car use is for local trips.*
Τα πετρελαιοκίνητα καίνε λιγότερο μέσα στην πόλη αλλά λόγω των φίλτρων DPF που απαιτούν τακτικά γρήγορες διαδρομές για να αναγεννηθούν, δε συνιστώνται πετρελαιοκίνητα για αποκλειστικές διαδρομές πόλης (παρά την χαμηλότερη κατανάλωση).
