| 摘要 |
PURPOSE:To improve a degree of practicality, by making level control performable to a desired value with a manual operation device, while storing the controlled level as a setting value, and afterward, making the level control performable by means of electronic control in order to maintain this setting value. CONSTITUTION:In the case where a rear body of a truck is set to the extent of optional height, an up button 42 or a down button 43 on a control panel 41 are operated. And, while each of these buttons 42 and 43 is pushing, an automatic feed valve 27 and an automatic exhaust valve 28 both are opened via a microcomputer 40, and air is fed or exhausted through a feed-exhaust pipe 26. With this operation, air springs 17 and 21 are made so as to perform level control operations. And, simultaneously with this level control, output of a level detecting sensor 56 is read out, and the output is stored as a setting value. Afterward, making this setting value a criterion, adjustment of the rear body takes place. That is today, on the basis of a deviation between the actual level and this setting value, these automatic feed and exhaust valves 27 and 28 are opened, whereby the level control of these air springs 17 and 21 are made to be performed. |
