EDIMO ?? Esslinger diesel motorcycle

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EDIMO ?? Esslinger diesel motorcycle
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EDIMO ?? Esslinger diesel motorcycle

EDIMO ?? Esslinger diesel motorcycle
Ecology and fun

The diesel motorcycle drives, and it does so cleanly and not at all sluggishly. But the project of the Esslingen University of Applied Sciences is running out after ten semesters of work. Professor Klaus Schellmann takes stock. And retires.

Klaus Schellmann

04/01/2007

Studying should arouse the longing for a job. Technology needs emotion, which is why a motorcycle project was an obvious choice. The goal was found quickly. The motorcycle range lacks a machine with a diesel engine that can resolve the supposed contradiction between ecology and driving pleasure.
Like us ?? more than 150 students and their professor, who always saw himself as a trainer? MOTORRAD has already learned that this has been successful: »Motorcycles and diesel? that could still be something. “(Issue 24/2004).
The EDIMO project showed that students would rather design and calculate than plan or develop concepts. But that is precisely what this project contained, and therefore all aspects of the engineers-
work integrated.
Because in contrast to respectable diesel motorcycles from hobbyists, a completely new motorcycle should be around three-
Smart cylinders are created. First of all, the direct injection had to be combined with a separately mounted gearbox that transmits 100 Nm and more. In such a way that the ensemble with the Rivera five-speed box is as compact as possible. Dummy superstructures and package studies using CAD resulted in a wheelbase of 1510 millimeters. With the steering head angle of 64 degrees to match the wheelbase, the typical driving behavior of a touring bike was to be expected.
The next focus was on the frame. In addition to the steering geometry, the best-suited Suzuki GSX 1400 fork, the longest possible swing arm and a wheel load distribution of 50 percent each, the driving behavior is determined by the torsional rigidity of the space frame optimized on the computer. Since the engine supports it, but does not have any suspension points that match the frame, it was screwed onto a bracket on the oil pan flange that closes the frame at the bottom and on which the gearbox can be moved to tension the primary belt. The shock absorber and lever are located under the gearbox to save space.
An important point in the conception of the motorcycle was the routing of the cooling air flows and the charge air. Tests in the wind tunnel brought clarity: cooling water, engine oil, charge air and the turbocharger
work in favorable temperature ranges because sufficient usable cooling air flows in above the fork bridge and a negative pressure area in front of the driver’s knees promotes the outflow of the cooling air. With a cladding designed according to these findings, fans for the radiator and charge air cooler could be dispensed with.
After the Smart engine plant in Berlin had cleared the biggest stone out of the way by activating the engine control system, driving tests with the prototype began. “Better than many a series-produced motorcycle,” said Waldemar Schwarz from MOTORRAD.
So it was about the functionality of the EDIMO great, but not about its appearance. A partial fairing that MOTORRAD draftsman Stefan Kraft had designed brought about a significant improvement.
Test drives showed: The fuel consumption is between 2.8 (ECE standard) and a maximum of 4.7 liters per 100 kilometers of motorway. At 100 km / h, three liters of diesel run through, 3.2 when driving quickly on country roads. There is hardly any feeling of lack of power, especially since the engine with chip tuning brings it to 59 hp and 120 Nm of torque. After all, good for a top speed of 180 km / h. In fourth gear, the EDIMO goes from 60 to 100 in just 4.1 seconds.
The engine is actually much too quiet, just turbo. Experts are welcome to comment on typical diesel vibrations: The vibration excitation of a three-cylinder diesel at low speed results less from unbalanced mass moments of the first or second order, but mainly from the tangential force peaks of the gas forces. The moment of inertia of the flywheel is responsible for this, and it lasts for so long
was slimmed down until the vibrations in the
Range of production motorcycles. The flywheel, which has been lightened by almost half, also makes the engine noticeably livelier. It runs cleanly, in two ways.
With the Euro 3 cycle, the CO and HC emissions remain below the limit by a factor of five and three, respectively-
evaluate. After installing a particle filter, these values ​​were even halved. However ?? but that was to be expected? the nitrogen oxides were more than three times higher than the 0.15 grams permitted by Euro 3
per kilometer. Which is probably why one also with Diesel motorcycle there is no avoiding exhaust gas recirculation. And as far as the soot is concerned: Even without a particle filter, the EDIMO remains under the Euro 4 standard that applies to cars. With the filter, no more than 0.004 g / km escapes, a value that is still far below the Euro 5 standard planned for passenger cars.
Conclusion: The EDIMO diesel motorcycle is really fun, even though it weighs 259 kilograms when empty. 30 of these would have to be saved with just one motor-gearbox unit. The next point of discussion is the characteristics of the diesel-
motors: Should it be tuned for low speeds and high torque or for better peak performance? Unfortunately, the EDIMO program has expired and the larger turbocharger that we obtained will probably no longer be used.

The detailed report by Klaus Schellmann, who was Professor of Combustion Engines at the Technical College of Technology in Esslingen until 2006, is available on the Internet at www.motorradonline, including further photos of the machine. de / edimo

EDIMO diesel motorcycle: Professor Schellmann takes stock

Studying should arouse the longing for a job. Technology needs emotion, which is why a motorcycle project was an obvious choice.
The goal was found quickly. The motorcycle range lacks a machine with a diesel engine, which is the supposed cons-
can resolve the argument between ecology and driving pleasure.
Like us ?? more than 150 students
and her professor, who is always too
understood as a coach? MOTORRAD has already learned that this has been successful: »Motorcycles and diesel? that could still be something. “(Issue 24/2004).
The EDIMO project showed that students would rather design and calculate than plan or develop concepts. But that is precisely what this project contained, and therefore all aspects of the engineers-
work integrated.
Because in contrast to respectable diesel motorcycles from hobbyists, a completely new motorcycle should be around three-
Smart cylinders are created. First of all, the direct injection had to be combined with a separately mounted gearbox that transmits 100 Nm and more. In such a way that the ensemble with the Rivera five-speed box is as compact as possible. Dummy superstructures and package studies using CAD resulted in a wheelbase of 1510 millimeters. With the steering head angle of 64 degrees to match the wheelbase, the typical driving behavior of a touring bike was to be expected.
The next focus was on the frame. In addition to steering geometry, well ge-
A suitable Suzuki GSX 1400 fork, the longest possible swing arm and a wheel load distribution of 50 percent each, the driving behavior is determined by the torsional rigidity of the space frame optimized on the computer. Since the engine supports it, but does not have any suspension points that match the frame, it was screwed onto a bracket on the oil pan flange that closes the frame at the bottom and on which the gearbox can be moved to tension the primary belt. The shock absorber and lever are located to save space
under the gearbox.
An important point in the conception of the motorcycle was the routing of the cooling air flows and the charge air. Tests in the wind tunnel brought clarity: cooling water, engine oil, charge air and the turbocharger
work in favorable temperature ranges because sufficient usable cooling air flows in above the fork bridge and a negative pressure area in front of the driver’s knees promotes the outflow of the cooling air. With a cladding designed according to these findings, fans for the radiator and charge air cooler could be dispensed with.
After the Smart-Motorenwerk in Berlin had cleared the biggest stone out of the way by activating the engine control, the driving started-
try the prototype. “Better than many a series-produced motorcycle,” said Waldemar Schwarz from MOTORRAD.
So the functionality of the EDIMO was excellent, but not its appearance. A clear improvement brought one
Partial fairing designed by MOTORRAD draftsman Stefan Kraft.
Test drives showed: The fuel consumption is between 2.8 (ECE standard) and a maximum of 4.7 liters per 100 kilometers of motorway. At 100 km / h, three liters of diesel run through, 3.2 when driving quickly on country roads. There is hardly any feeling of lack of power, especially since the engine with chip tuning brings it to 59 hp and 120 Nm of torque. After all, good for a top speed of 180 km / h. In fourth gear, the EDIMO goes from 60 to 100 in just 4.1 seconds.
The engine is actually much too quiet, just turbo. Experts are welcome to comment on typical diesel vibrations: The vibration excitation of a three-cylinder diesel at low speed results less from unbalanced mass moments of the first or second order, but mainly from the tangential force peaks of the gas forces. The moment of inertia of the flywheel is responsible for this, which is so long
was slimmed down until the vibrations in the
Range of production motorcycles. The flywheel, which has been lightened by almost half, also makes the engine noticeably livelier. It runs cleanly, in two ways.
With the Euro 3 cycle, the CO and HC emissions remain below the limit by a factor of five and three, respectively-
evaluate. After installing a particle filter, these values ​​were even halved. However ?? but that was to be expected? the nitrogen oxides were more than three times higher than the 0.15 grams permitted by Euro 3
per kilometer. Which is why you can’t avoid exhaust gas recirculation even with diesel motorcycles. And as far as the soot is concerned: Even without a particle filter, the EDIMO remains under the Euro 4 standard that applies to cars. With the filter, no more than 0.004 g / km escapes, a value that is still far below the Euro 5 standard planned for passenger cars.
Conclusion: The EDIMO diesel motorcycle is really fun, even though it weighs 259 kilograms when empty. 30 of these would have to be saved with just one motor-gearbox unit. The next point of discussion is the characteristics of the diesel-
motors: Should it be tuned for low speeds and high torque or for better peak performance? Unfortunately, the EDIMO program has expired and the larger turbocharger that we obtained will probably no longer be used.

The detailed report by Klaus Schellmann, who was Professor of Combustion Engines at the Technical College of Technology in Esslingen until 2006, is available on the Internet at www.motorradonline, including further photos of the machine. de / edimo

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