Lowering spring
Lowering springs are vehicle suspension springs that lower the level of the vehicle. Here i. d. Usually the spring rate is also increased compared to the standard springs.
conditions
- Lowering the vehicle level in order to lower the center of gravity of the car.
- Improving driving safety by reducing the side slope of the vehicle. (Rocking)
- Increase in the spring rate (compared to the standard springs with an associated reduction in driving comfort)
- Improvement of the driving behavior (change of the spring rate ratio VA / HA)
- Firm seat of the spring when the vehicle is fully extended ("under normal operating conditions")
- Improvement of the optics
- Compliance with the requirements of the TÜV regarding the limit spring rate / residual spring travel, minimum ground clearance, etc.
execution
A lowering spring can in the simplest case only z. B. 30 mm shorter than the original spring. With the same spring rate compared to the original spring and an axle ratio of 1: 1, the vehicle is also lowered by 30 mm.
If the spring rate is increased , the difference must be correspondingly higher for the same decrease. Since the spring length cannot be shortened arbitrarily, lowering springs must i. d. Usually designed progressively in order to be able to realize all requirements. Here, several (usually 2) linear spring rates are combined within one spring. A version with an inconsistent spring rate over the entire spring travel is less common. Another difficulty in the design is the axle ratio (lever law), which must also be taken into account. Due to the variety of axle constructions (multi-link axle), this transmission ratio is not always constant over the spring travel and must be taken into account in the calculation.
Legal position
In addition to the information in the vehicle tuning article , the requirements of VdTÜV leaflet 751 must be met for chassis modifications in order to obtain a parts certificate or for individual acceptance tests according to §21.
See also
literature
- DIN-Taschenbuch 29: Springs . Ed .: DIN. Beuth Verlag GmbH , Berlin 1996, ISBN 3-410-12451-9 .
Individual evidence
Web links
Manufacturers (producers) of lowering springs
Germany
- http://www.eibach.de
- http://www.lowtec.de
- http://www.vogtland.com
- http://www.hr.com
- http://www.KWsuspensions.com
- http://www.weitec.de
- http://www.ap.de
- http://www.grueber.de
Netherlands