Electric control suspension apparatus

Abstract

Abstract PURPOSE:To control an attitude of a vehicle while keeping a proper amount of control even if the amount of attitude changes severely due to a change of inertial of the vehicle by keeping reaction force of the spring of a suspension unit equivalent to the same reaction force appearing when a vehicle height reaches a target one corresponding to a reference attitude. CONSTITUTION:A main air spring chamber 3 serving also as a vehicle height adjusting fluid chamber is provided on the upper part of a shock absorber 1 coaxially with a piston rod 2. An acceleration sensor 36 is adapted to detect an attitude change of a vehicle body and thereby issue output voltage VG proportional to the magnitude of an acceleration G, said output voltage being delivered to a control unit 34. An intake air flow rate control valve 20 and an exhaust flow rate control valve 27 are switched on by control by the unit 34. And, with a large amount of an attitude change produced on a vehicle body, the valves 20, 27 are switched off by the control of the unit 34 to set large diameter air supply passage and exhaust flow path, and thereafter the valves 19, 23 and 26 are switched on to permit compressed air to be supplied to the spring chamber 3.

Inventors

• 👤 Shozo Takizawa
• 👤 滝澤　省三

Bibliographic Details