Relationship between weight and fuel economy

relationship between weight and fuel economy

The analysis looks at available weight and fuel efficiency data for of relationship that exists between weight and energy consumption. I know the Ford Excursion doesn't get super awesome gas mileage (around 14 mpg), but what about the relationship between mass and. A least-squares regression line was drawn over the scatter diagram. The regression line drawn shows a negative relation between the two.

As we discovered in a previous Greenlingscarbon fiber is a remarkable, lightweight substance that will begin see wider use as prices invariably come down. Today, one of the main reasons automakers want to reduce weight is because it's a great way to increase MPG numbers.

How does weight affect a vehicle's efficiency? - Autoblog

AutoblogGreen reader GenWaylaid sent in a Greenlings question about how, exactly, reducing weight helps efficiency. We investigate his query after the jump. Let's start with the easy and simple numbers.

The EPA says that for every pounds taken out of the vehicle, the fuel economy is increased by percent. Of course, lbs. For a more detailed look at what's possible, consider a report issued by the Aluminum Association, Inc. The chart below shows that for a small car with a 1.

relationship between weight and fuel economy

Eliminating ten percent of the weight provides a 4. Ways to remove weight in your own car Since the automakers have already made their decisions regarding how heavy your vehicle is going to be, it's up to each driver to eliminate weight whenever and wherever possible. The place to start is in the trunk and in the back seat. Got some old boxes in there you never use?

Easy way how to Gain HP or Save Gas MPG Fuel economy, Diablo car tuner review

Put 'em in the garage. Been carrying around a set of golf clubs since last weekend?

Gas Guzzler Weights

Put 'em aside for now. Got a dead body in there? With the inherent volatility of the data, some may argue that any analyses would be invalid. It seems, however, that any biases and systematic errors in the measurements or in their reporting would effect all car manufacturers equally, allowing general trends to be derived from the data.

Ultimately I relied on Kelley Blue Book's online database for curb weight data, and on the epa for fuel efficiency data.

Analysis In determining the effect of vehicle weight on vehicle gas mileage, it is important to first understand the type of relationship that exists between weight and energy consumption.

There are a number of inefficiencies and sources of energy consumption in a vehicle. Two terms, however stand out as being the most significant from a weight perspective: Since of these factors scale linearly with vehicle weight, it can be said that energy consumption as a whole scales roughly linearly with vehicle weight.

Therefore, for this analysis, weight data and fuel efficiency were related as seen in Eq.

relationship between weight and fuel economy

Results From the data, it is clear that vehicle weight has an inverse relationship with fuel economy. As seen in Figs.

relationship between weight and fuel economy

Therefore, it is safe to say that curb weight has a strong effect on vehicle efficiency. Despite this relationship, a careful analysis of the vehicle data shows that many other factors also substantially impact vehicle fuel efficiency.

How does weight affect a vehicle's efficiency?

Specifically, the curve-fits for vehicles' city and highway gas mileage versus weight show a large variation between fuel efficiency in vehicles of roughly the same weight class. For city mileage, where the root mean sum of residual errors is 0.

relationship between weight and fuel economy

Applying this analysis to highway fuel efficiency provides similar results. Once again, there is a strong relationship between weight and fuel efficiency. Admittedly, these numbers may are not very impressive for small cars. For large cars, however, merely optimizing a vehicle for fuel efficiency has the same effect as decreasing curb weight by a third.