| 摘要 |
A hydraulic drive apparatus (10) comprises a main pump (16) for pumping hydraulic fluid through a hydraulic load (11), a charge pump (15) for continuously pumping pressurised hydraulic fluid to the main pump (16), and a hydraulic fluid cooler (13). At least a portion of the hydraulic fluid pumped through the hydraulic load (11) is returned under pressure to the charge pump (15) and the charge pump (15) pumps the pressurised hydraulic fluid through the hydraulic fluid cooler (13) to the main pump (16). |
