Spring apparatus

A vehicle height adjusting system having a vehicle spring apparatus, the system comprising:

• a housing having fluid sealed within the housing;
• a cylinder with a slidably fitted piston;
• a piston rod connected at one end thereof to said piston, said piston rod extending at the other end thereof to outside of said cylinder, wherein said cylinder is connected via a passage and a first valve to a first accumulator chamber having a springing medium, said cylinder being connected via a passage and a second valve to a second accumulator chamber having a springing medium,
• said accumulator chambers also being connected with each other via at least one controllable pump and a plurality of vehicle height detectors for detecting the vehicle height;
• a control unit;
• a vehicle spring apparatus being provided between sprung and unsprung parts of said vehicle,
• wherein the pump fitted between said accumulator chambers may be fed with power for transferring fluid from the second accumulator chamber to the first accumulator chamber in order to increase the distance between sprung and unsprung parts of said vehicle wherein the distance between sprung and unsprung parts of said vehicle is to be reduced a fluid transfer from said first accumulator chamber to said second accumulator chamber is performed.

A vehicle comprising a vehicle spring apparatus comprising:

• a housing having fluid sealed therein;
• a cylinder with a slidably fitted piston;
• and
• a piston rod connected at one end thereof to said piston, said piston rod extending at the other end thereof to outside of said cylinder, wherein said cylinder is connected via a passage and a first valve to a first accumulator chamber comprising a first springing medium, said cylinder is connected via a passage and a second valve to a second accumulator chamber having a second springing medium, and said accumulator chambers also being connected with each other via at least one controllable pump.

A vehicle comprising a height adjusting system having a vehicle spring apparatus, the system comprising:

• a housing having fluid sealed therein;
• a cylinder with a slidably fitted piston;
• a piston rod connected at one end thereof to said piston, said piston rod extending at the other end thereof to outside of said cylinder wherein said cylinder is connected via a passage and a first valve to a first accumulator chamber comprising a springing medium, said cylinder is connected via a passage and a second valve to a second accumulator chamber comprising a springing medium, said accumulator chambers also being connected with each other via at least one controllable pump and, vehicle height detectors for detecting the vehicle height;
• a control unit;
• said vehicle spring apparatus being provided between sprung and unsprung parts of said vehicle, wherein the pump fitted between said accumulator chambers may be fed with power for transferring fluid from the second accumulator chamber to the first accumulator chamber in order to increase the distance between sprung and unsprung parts of said vehicle, whereas when the distance between sprung and unsprung parts of said vehicle is to be reduced a fluid transfer from said first accumulator chamber to said second accumulator chamber is performed.