Specific fuel consumption of your car

As you know, the cost of gasoline is at least 30% of all operating costs of the vehicle. Waste of fuel, finding ways to avoid or at least reduce – a constant headache as designers of cars, and ordinary car owners. Therefore, among the most important consumer qualities your car on one of the first places – its fuel efficiency.

What is it? This characteristic refers to the set of operational characteristics of fuel consumption of this specific vehicle in different driving conditions and modes of operation. Depends on the figure from the design features of the car, or rather, from the totality of the efficiency of the engine and transmission. Also, fuel efficiency is influenced by the ratio of payload and body shape, the aerodynamics of which depends on the additional fuel consumption to overcome air resistance.

Quantitative characteristics fuel economy – track the fuel consumption, i.e., the number of liters of gasoline consumed per 100 kilometers on average (under normal operating conditions and typical conditions of roads), and specific fuel consumption. Of course, this value is quite conventional, especially when driving in the city, with its constant acceleration and deceleration.

Fuel consumption – its consumption per unit of work for this car. Applied this rate is usually in the calculation of the economic efficiency of transport (freight or passenger). It is calculated as the ratio of the average fuel consumption per unit of engine power to the distance traveled (specific consumption per 1 km). Or flow rate is determined per unit of time (per hour or per second).

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The Specific fuel consumption is established by standard tests on the engine stand. Car engine forced to work with a certain load and constant speed (adjusting the throttle position). Moving the engine to a predetermined operating point, fixed torque on the shaft and determine the hourly fuel consumption. Therefore, the smaller the resulting number, the higher effective coefficient of the action.

Compliance with the specified manufacturer parameters of the fuel consumption depends on the adjustment and timely repair of the engine and operating conditions.

What may take the average driver to increase the efficiency of your car?

What style of riding best? Early in the operation of vehicles with carburetors at a load of about 80% included an economizer and carried out post-injection of fuel, which led to unnecessary fuel consumption. The optimal efficiency in this case was the regime on the threshold of its inclusion, ie when the engine load is about 75%.

Later released In the carburetor efficiency was achieved with a more powerful load close to maximum. In cars with injection engines have peak efficiency at a load of about 90%. Quick acceleration when pressed up to the stop pedal, contrary to popular belief, improves the fuel consumption is quite low (no more than 3-5%). Of course, all these are only for ideal conditions on a flat road.

But how often do we have to ride on a smooth country road with little traffic? More often the vehicle is driven in city streets with their inevitable traffic jams and traffic lights. Riding in a constant acceleration-deceleration increases fuel consumption greatly.

As you know, the best is the type of motion with the rotation speed from 2000 to 2500 rpm and the throttle open about 20%. Such a regime under intense acceleration and braking almost impossible to achieve, the operation of the motor is converted into useless heat energy to ignite.

Therefore, the only correct advice to drivers in this case – to achieve a uniform as possible a smoother ride (slow to move and slow). The expression "slow and steady" in this sense it is appropriate as ever.