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Car hydraulics are equipment installed in an automobile that allows for a dynamic adjustment in height of the vehicle. These suspension modifications are often placed in a lowrider, i.e., a vehicle modified to lower its ground clearance below that of its original design. With these modifications, the body of the car can be raised by remote control.
When the car is too low, the height corrector valve opens to allow more fluid into the suspension cylinder (e.g., the car is loaded). When the car is too high (e.g. after unloading) fluid is returned to the system reservoir via low-pressure return lines. Height correctors act with some delay in order not to correct regular suspension movements.
Lowrider cars had their origins in the 1940s, when Mexican American veterans began customizing vehicles to run "low and slow", a contrast to the hot rod that was customized for speed. During the Chicano Movement in the 1970s, lowriders formed car clubs that began to help their community by using these cars for fundraising. [18]
Rotary vane shock absorber, 1935. Lever arm shock absorbers were the first form of hydraulic shock absorber or damper used for car suspension.They appeared in the 1930s and were most commonly used in the 1950s and 1960s, but were replaced by telescopic shock absorbers in the 1970s. [1]
Lotus fitted and developed a prototype system to a 1985 Excel with electro-hydraulic active suspension, but never offered it for sale to the public, although many demonstration cars were built for other manufacturers. Sensors continually monitor body movement and vehicle ride level, constantly supplying the computer with new data.
The French company Citroën devised a high-pressure hydraulics system for cars which was used for all manner of systems, even power-adjustable seats. The 1999–2004 Jeep Grand Cherokee had a hydraulically driven radiator fan, powered by the SUV's power steering pump.
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