Under the condition of ensuring the power performance, the car can drive economically with as little fuel consumption as possible.The specific fuel consumption (SFC) is expressed by the fuel mass per unit work consumption.
Definition: The ability of a car to drive economically with as little fuel consumption as possible under the condition of ensuring power performance.
Engine fuel economy: expressed by the fuel mass per unit work consumption, it is called Specific Fuel Consumption (SFC).
f=1000F/P
Where, f is the fuel consumption rate (g/(kW · h));F is fuel consumption (kg/h);P is the power (kW).
The fuel quality corresponding to the unit indicated work consumption is called the indicated specific fuel consumption (ISFC), and the fuel quality corresponding to the unit effective work consumption is called the break specific fuel consumption (BSFC).
Vehicle fuel economy
Announce
edit
Vehicle fuel economy: it is expressed by the cycle fuel consumption under the determined test cycle driving condition and the constant speed fuel consumption under the condition of driving at a certain speed on a flat road surface, using km/L, MPG (Miles Per Gallon), L/100km, etc. as the measurement unit.
influence factor
Announce
edit
1. Vehicle quality
2. Driving resistance
3. Transmission
4. Engine
5. Exhaust regulations
6. Power steering and air conditioning
7. Travel speed
statute
Announce
edit
1. Enterprise Average Fuel Consumption Regulations (CAFE)
2. Gas Guzzler Tax
3. Determine fuel consumption regulations according to vehicles
4. Industry self-discipline
Improvement measures
Announce
edit
1. Improve engine thermal efficiency
2. . Application of efficient working area of engine
3. Reduce accessory drive power
4. Reduce the fuel supply of non driving dynamics
5. Recovery of deceleration energy
6. Reduce driving resistance
Technologies to improve fuel economy
Announce
edit
gasoline engine
(1) In cylinder direct injection lean combustion (2) Intake port injection lean combustion (3) Variable valve mechanism
Diesel engine
(1) Direct injection (2) Improvement of supercharger (3) Reduction of intake and exhaust losses[1]
