Electronic controlled air suspension system

An electronic controlled air suspension system comprising:

• an air spring (M2) provided to a wheel (M1) of a vehicle;
• a low pressure reserve tank (M3) and a high pressure reserve tank (M4), both communicable with the air spring;
• an air supplying means for supplying air to the low pressure reserve tank and the high pressure reserve tank and capable of supplying air from the low pressure reserve tank to the high pressure reserve tank;
• an air flow control means (M5) for controlling air flow among the air spring, the air supplying means, the low pressure reserve tank and the high pressure reserve tank in order to control an attitude of the vehicle;
• a high pressure air state detection means (M6) for detecting an air state in the high pressure reserve tank (M4);
• a low pressure air state detection means (M7) for detecting an air state in the low pressure reserve tank (M3);
• a discharging means for discharging air in the low pressure reserve tank to the atmosphere;
• a first control means (M8) for preferring control of the air state in the low pressure reserve tank utilizing the air supplying means and the discharging means until a sum of a detected air state in the high pressure reserve tank and a detected air state in the low pressure reserve tank attains a first state;
• and
• a second control means (M9) for supplying air from the low pressure reserve tank to the high pressure reserve tank utilizing the air supplying means until the detected air state in the high pressure reserve tank attains a second state after the a control by the first control means is completed.