| 摘要 |
<p>An engine stall prevention control method for construction machines for automatically preventing engine stalls without complicated inching pedal operations to thereby prevent the operator from being exhausted, comprising a transmission (10) in which forward and reverse clutches (40, 32) that are located at the first step from an input shaft (13) are selectively brought into engagement to perform shifting between forward and reverse gears and a plurality of speed-change clutches (66, 68, 74) that are located at the second step from the input shaft (13) are selectively brought into engagement to perform shifting between speed gears, and respective electronically controlled modulating valves (107-111) for generating hydraulic pressures corresponding to electric commands from a transmission controller (131) at the respective clutches, said method being characterized in that an engine stall prevention control zone (P) and an engine stall prevention control releasing zone (Q) are set by an engine speed and a differentiated value of the engine speed, whereby when those engine speed and differentiated value of the engine speed fall within the control zone (P), the hydraulic pressure of said engaged clutch is reduced, while when falling within the release zone (Q), the hydraulic pressure of the engaged clutch is increased.</p> |
