|
In Reply to: Translated here! part # 1 posted by Simon on April 17, 2000 at 16:05:12:
The entire engine port pushes itself around the component time. The running driver fights for tenth ofs a second on the racing course, engineers files at the chassis, in order to away-plane the last time splinters. Everything, everything is really subordinated to the purpose to defeat the time.
Everywhere, where really large things are understood in developing, the victory is over the factor time the harbinger of actual success. Not differently it behaves with the " project 24 hours " from sport auto. With support of the BMWS technique GmbH we want to 24. At 16.00 o'clock with a victoryable running auto with the legendary long-distance classical author at the Nuerburgring to the start go to June 2000.
As hard all involved ones in the success of the overall project schuften, is to be fathomed really only locally with the view into the workshops. For example the topic engine. The detailed work and the structure of the engines the company Randlinger engine port in Freiburg was assigned. As technique partners of many years of BMW and many private teams they enjoy a outstanding call in the scene. For each technique fan thereby the simple question is interesting: How crimping I from one only 3.2 litres large running engine about 400 HP and more than 400 Newtonmeters torque out? " whole simply is that naturally not ", under-drives Johann Randlinger, " a capacity increase to the increase in output for constructional reasons separates there, must we the performance by increase of the number of revolutions and improvement of the cylinder filling herauskitzeln. "
In order to be able to raise the number of revolutions level to the focused level of 8500 revolutions, first the rotary masses in the crank gear must be reduced clearly, without placing thereby the stability in question. A job for people with much experience. In the standard engine mount one performs heaved crankshaft their service at the cheeks facilitated and precisely. The piston rod record is processed and in the weight exactly adapted, the surface of the piston rods is ball-radiated for better remuneration. In the bushes friction-minimized pistons slide. In the comparison to the standard type they could be abgespeckt also owing to extremely easier and high-strength gudgeon pins around almost 100 gram. The completely modified flywheel saves again 6.5 kilograms.
The so prepared underbody requires a clear plus at supplied frischgas by the risen number of revolutions level, because increased burn printing only in such a way stops itself and the attainable performance will significantly rise. In order to obtain this improvement of the cylinder filling, it requires extensive adjustments on the sucking in and exhaust page. For this purpose first the cylinder head of the running engine of a detailed rework is submitted. Both the sucking in and the wastegas flues in the cross section are extended clearly, the surfaces are complex smoothed. The transitions between the heading channels and the completely processed butterfly valve housing as well as the running fan elbow union must be adapted accurately, because each still so small collection produces a narrowing of the cross section and favours the formation of performance-restraining eddies. To the improvement of the cylinder filling belonged also the direct use of loading effects within the area that extremely voluminoesen air box. Newly outlined cam shafts for longer timetime times and more ventilhub coordinate the tanz of the almost in series left valves in interaction with the double Vanos system already installed in the series.
Together with on 13:1 increased compression of the engine and completely new control electronics result approximately 400 HP maximum performance, which corresponds to a specific litre performance of zirka 125 HP per litre capacity - a value sensational for suction engines. Owing to the retention of the variable cam shaft adjustment are also the anvisierten torque values on record-suspicious level. More than 400 Newtonmeters out even once 3.2 litres capacity issue the work of the engine specialists at BMW and the company Randlinger a magnificent certification.
Also engineers of the BMWS technique GmbH in Munich carry out magnificent work. The structure of the Rolling chassis is in full courses, added for the final structure of the vehicle is situated ready. Also the experienced observer must separate from old conceptions. Today running auto is not created to large sections no more in the building of samples.
This into the recent past common method it has the disadvantage that in a first work procedure all components are made individually and installed quasi test for the sake of at the running auto. Then the raw body is again stripped, painted and completed finally with the properly matching sections again.
The today's state of the art permits the perfect and millimeter-exact calculation of all modules by means of ACD TECHNIQUE (computer Aided Design) at the display. Fiddle, fairs and files with the object are omitted as far as possible. Thus for example the complete layout of all chassis components at the computer in the apron is accurately calculated. The basic data of the base body of the BMW M Coupé needed for it are present naturally already from the series construction. Since the chassis of the M Coupé is based on the technique of the BMW E30, the noble sections from the old DTM use can find for the running auto. Since the high-stung computer engineering was not available at that time, the basic data for coupling points, wishbone mass and the like must be digitized specially for the building of the run m Coupé. After the determination after the specifications of engineers body components and chassis components in the desired configuration are then linked together. All components can be manufactured so perfectly properly matching and be blocked then directly in the vehicle. The construction flow of modern running vehicles follows thereby accurately the sample of the industriellen manufacturing of series vehicles.
© 1997 -
2009
Jump Internet Inc. All rights reserved.
