Diesel Test Results Average 15%
with Hydrogen Boost
the last couple months I have been in contact with a couple students and
their professor at Purdue
wanted to do a senior project testing Hydrogen Boost on a diesel engine
with an engine dynamometer. The
test used three types of fuel, petroleum diesel, bio-diesel, and
vegetable oil. I would like to
give the students’ and professor’s names but have not asked them for
permission so I will hold that in confidence unless they contact me with
permission. I will publish a few
pictures in this article however.
students were furnished with a Diesel small vehicle Hydrogen Boost system
but could not use the engine treatment without permanently altering the
engine (the treatment is a permanent engine treatment) so they did not
test that part of the system. The
fuel heater was not used either because of concern about the lubrication
of the internal parts of the mechanical injection pump. So the only part of our system that was
tested was the hydrogen generator, which produces Brown’s gas. I asked for not only the final report,
which was impressive in itself, but I asked for and received the raw test
data so I could analyze it and produce my own report.
results reported here will be on the tests run with petroleum diesel and
vegetable oil. The test results
tables for the bio-diesel tests were mislabeled and hence unreliable, but
the charts show an even better improvement with Hydrogen Boost than did
the petroleum diesel charts and the vegetable oil charts. To see the raw data on the tests please
visit www.hydrogen-boost.com/raw data.html Following the report of my analysis of
the raw data will be excerpts from their report.
petroleum diesel fueled tests I took data from the spreadsheets provided,
and divided the horsepower produced at each engine setting with the fuel
consumption at that setting. This
gives us an amount of work done per gallon of fuel used, in units of
hp/gal/hr or hp x hr/gal. I then
added up all the calculations for each throttle setting and rpm setting
of the entire test and compared the final totals to get the following:
Hydrogen boost the total was 254.14 and with Hydrogen Boost the total
was288.49 for an increase in work accomplished of 13.52%.
vegetable oil fueled tests the data was in a different format. There were two sets of data given. One was torque (lb-ft) for varying SFC
(lb/hph) values. And the other was torque (lb-ft) for
each rpm at throttle settings of 100%, 75%, 50%, and 25%. On each set of data more torque meant
better efficiency or performance.
The total of the data point was added and compared with the
for varying SFC settings totaled 13,839 without Hydrogen Boost and 16,272
Boost for an increase of 18.36%.
for each rpm at the various throttle settings totaled 4065.5 without
Hydrogen Boost and 4579.4 with Hydrogen Boost for an increase of
12.64%. This does not take into
account the savings in fuel.
the charts for the vegetable oil tests with and without Hydrogen Boost,
you will notice an even better improvement with Hydrogen Boost than the petroleum
diesel tests. Also comparing the
charts for the bio-diesel tests with and without Hydrogen Boost, you will
notice an even better improvement than with either of the other two
results in the Purdue
included the following:
Fuel Consumption (measured at max torque)
On Road Diesel:
0.072 gal/hp-hr @ 1100 rpm
On Road Diesel w/Hydrogen:
0.065 gal/hp-hr @ 1100 rpm
0.064 gal/hp-hr @ 1100 rpm
Vegetable Oil w/Hydrogen:
0.060 gal/hp-hr @ 1100 rpm
Fuel Efficiency increase/decrease (compared to on
road petroleum diesel)
On Road Diesel w/Hydrogen:
Vegetable Oil w/Hydrogen:
Following is from the Purdue University
Dynamometer tests have been
performed on a 4.5L John Deere diesel engine to obtain torque,
horsepower, and specific fuel consumption by testing the fuels
individually and also using hydrogen assist with each. The data was compiled into total
performance maps. Fuels tested
include on road diesel, bio-diesel (B20) and vegetable oil (canola
objective was to perform dynamometer tests on a 4.5L JD diesel engine to
obtain total performance maps from the following data. The total performance maps provided
information on whether the vegetable oil or the hydrogen boost system help in reducing fuel consumption.
six dynamometer tests were run with different fuel combinations in order
to determine the performance analysis of the two systems. Three fuel types were used, including
on road diesel, B20 bio-diesel blend, and canola oil. With each of these three fuels, tests
were executed both with and without hydrogen assist. Each test was compared to the 100%
petroleum diesel, which was the baseline control test. In order to
maintain consistency and an unbiased evaluation, all tests were performed
on the same John Deere engine, using the same dynamometer, under the same
dynamometer tests were run, each fuel type’s energy content was
calculated by way of heat of combustion assessments. An adiabatic bomb calorimeter was used
for these processes. By
calculating the energy content (observed in calories per gram of fuel) of
each fuel, a theoretical analysis could aid in prediction of each fuel’s
relative power output.
systems were supplied for these tests.
One system was a vegetable fuel system contributed by
GreaseCar.com. This system was a
complete secondary fuel system designed to be integrated into the
existing fuel system. The
principle behind this system was to use waste vegetable oil gathered from
places such as restaurant deep fryers.
Even though the kit was designed to use waste vegetable oil, new
Crystal Cottonseed/Canola oil blend. Using new oil ensured consistency
The second system was a
Hydrogen assist unit contributed by Hydrogen-boost.com. Through the process of hydrolysis, the
system separated water into hydrogen and oxygen. The separated gases were then directed
into the airflow prior to the air cleaner.
of vegetable oil as a fuel source has been around for over 100
years. The first documented use was
demonstrated by Otto at the 1900 World’s fair, using peanut oil. Also, Rudolf Diesel’s invention was
originally intended to operate on peanut oil, but it was discovered that
the diesel engine could run on cheaper petroleum oil.
The hydrogen/oxygen generator
was first developed in 1918 by Charles Frazer. Hydrogen boost systems help improve
combustion characteristics of petroleum based fuel sources. The gases created act as a catalyst to
the fuel, creating better propagation, and more complete combustion. They also are said to reduce
hydrocarbons in the exhaust, reducing emissions.
Problems and Difficulties:
on in the project, problems arose and were overcome. As part of the original plan, an
International Powerstroke 6.0L turbo-diesel engine
was to be used. Shortly after
delivery, it was revealed that the dynamometer housed in the ABE building
was too small to absorb the amount of power, or handle the operating
speeds of the engine. Once
discovered, it was decided to utilize the John Deere engine that was
currently set up for dynamometer operation. This setback actually shortened
installation time, as the engine was already attached to the dynamometer.
crucial problem came about when the existing fuel consumption meters
malfunctioned. New meters were
purchased, installed and calibrated for the fuel types to be used.
receiving the vegetable oil fuel system from GreaseCar.com, it was
realized that vegetable oil fuel should not pass through the original
diesel fuel filter. To solve this
problem, a series of fuel filters was installed in the shape of a
parallel electric circuit, along with fuel shutoff valves to ensure
proper isolation of the different fuel sources. This also prevented cross-contamination
between fuels, which could have possibly altered the outcome of the
The raw data from the report was much more
valuable than the brief analysis by the students who published their
report. For example the increase
in torque or decrease in fuel used at an arbitrary rpm and throttle
setting is quite meaningless.
Their report of fuel consumption at 1100 RPM and maximum torque
achieved is one point on a chart of over one hundred points. If we were to cherry pick one point
that highlights the best Hydrogen Boost performance we could show a 61.4% improvement
with petroleum diesel and a 57.5% improvement with vegetable oil, by the use of
our hydrogen generator alone.
These points are as meaningless as the arbitrary point chosen by
the students. Only the cumulative
improvement across the whole range of operating conditions gives us a
good picture of the effect of Hydrogen Boost on the diesel
combustion. The average of the
three improvements we calculated above is an impressive 15%.
Or if we wanted to analyze the affects of Hydrogen
Boost at the most frequent engine operating condition likely during our
expected operation we should look at the following. According to our diesel tractor trailer
customer who is doing extensive testing with Hydrogen Boost the most
frequent operating condition of the engine on the road is at 1300 to 1400
RPM at heavy throttle. If we take
the results reported for 100% throttle at 1300 RPM with petroleum diesel
fuel we see a 31.6% increase in work done per gallon of diesel fuel
used. If this result proved to be
the same on the big diesel engines in our tractor trailer fleet we would
expect over 30%
mileage increase with the addition of the Hydrogen Boost hydrogen
generator alone. Though I do not
expect this kind of increase with Hydrogen Boost on tractor trailers I am
quite confident that there is much more to this technology than I had
These calculations are real comparisons in that they
are not comparing fuel consumption at a single throttle setting (giving
different torque in each test) but instead are comparing the amount of
work done by the set amount of fuel; which could be assumed to be
somewhat equivalent to our normal reporting of miles per gallon.
For those skeptics that doubt these results I want to
assure you that the power to produce the hydrogen came from the
alternator of the engine being tested.
I must say that I am very impressed because I have only expected
maybe a 5% improvement with the Hydrogen Generator alone. Just think what the complete Hydrogen
Boost system might achieve.
Also please note that the vegetable oil test proved
the ability of vegetable oil to produce more torque at a lower fuel
consumption rate than petroleum diesel fuel. What makes this even more noteworthy is
that the energy content by weight of the vegetable oil is actually 11%
less than petroleum diesel fuel (see table below). Note that the vegetable oil was heated
to engine coolant temperature before injection. I am certain that if our fuel heater
was used on the petroleum diesel and bio-diesel tests it would have shown
even more of an improvement.
On Road Diesel:
For more information on dynamometer testing with
Hydrogen Boost see:
trailer ECM reports