Abstract:
A cooling system (28) is provided for an engine (18). The cooling system may have an air cooler (30) configured to cool intake air being supplied to the engine. The cooling system may also have a sensor (38) configured to generate a temperature signal indicative of a temperature of the intake air and a fan (46) in proximity to the air cooler. The cooling system may further have a controller (58) in communication with the sensor and the fan. The controller may be configured to cause the fan to operate at a speed that is a function of the temperature signal when the temperature of the intake air is above a threshold temperature. The controller may further be configured to selectively cause the fan to pulse when the temperature of the intake air drops below the threshold temperature.
Abstract:
Vorrichtung zur Steuerung des Betriebs eines mittels eines Hydromotors (1) antreibbaren Lüfters einer Kühleinrichtung, insbesondere bei einer Arbeitsgerätschaft für landwirtschaftlichen Einsatz, wobei der Hydromotor (1) mit Druckfluid mittels einer Hydropumpe (3) über eine Ventilanordnung (7) versorgbar ist, die in eine erste Ventilstellung für einen in einer ersten Drehrichtung erfolgenden Betrieb des Hydromotors (1) sowie in eine zweite Ventilstellung für den Betrieb des Hydromotors (1) in einer zweiten Drehrichtung einstellbar ist, und wobei eine Steuereinrichtung (21) vorhanden ist, mittels deren die Ventilanordnung (7) bei Übergängen zwischen erster und zweiter Ventilstellung in eine die Druckversorgung des Hydromotors (1) verringernde Zwischenstellung für einen Zeitraum einstellbar ist, der,einen Abbau der Lüfterdrehzahl ermöglicht.
Abstract:
본 발명은 소정의 팬과 상기 팬의 제동장치를 각기 제어하는 콘트롤러와, 전기에너지를 충전하는 배터리를 구비한 하이브리드 건설기계 배터리 충전 시스템의 충전 방법에 있어서, 상기 콘트롤러가 현재 냉각수 온도, 유압유 온도, 엔진 흡입 공기 온도에 따라 구한 현재 목표 팬 회전 속도가 측정시의 실제 팬 회전 속도 보다 작은 경우 상기 목표 회전 속도까지 상기 팬 회전 속도를 감소시키도록 상기 제동장치를 제어하는 단계 및, 상기 제어를 통해 상기 제동장치에 의해 상기 팬의 회전속도가 상기 측정시의 실제 팬 회전 속도에서 상기 목표 회전 속도까지 감소될 때 발생되는 회전력에 의한 전기에너지를 배터리에 충전하는 단계를 포함하여 이루어진 팬의 회전력을 이용한 하이브리드 건설기계의 배터리 충전 시스템의 충전 방법 및 그 시스템에 관한 것으로, 팬의 회전력에 의해 발생된 전기에너지를 배터리에 저장하여 엔진 가동 시간을 줄이므로 연비 절감 효과를 얻을 수 있다.
Abstract:
A control system for use with a machine (10) having an engine (12) is disclosed. The control system may have a cooling circuit (34), a heat exchanger (38) associated with the cooling circuit, and a sensor (48) configured to generate a signal indicative of a temperature of the cooling circuit. The cooling system may also have a fan (40) mechanically driven by the engine to direct air through the cooling circuit, and a controller (46) in communication with the sensor and the engine. The controller may be configured to adjust a speed of the engine based on the signal.
Abstract:
A hydraulic fan circuit (10) includes a primary pump (14), a motor (18) fluidly connected to the primary pump (14), and a fan (20) operably connected to and driven by the motor (18). The circuit (10) also includes a supply passage (26) extending from the primary pump (14) to the motor (18), a return passage (24) extending from the motor (18) to the primary pump (14), and a pressure limiting valve (54) configured to selectively reduce pressure of a flow of pilot fluid directed to the primary pump (14). The circuit (10) further includes an override valve (66) configured to selectively connect the supply passage (26) to the pressure limiting valve (54).
Abstract:
A control system for use with a machine (10) having an engine (12) is disclosed. The control system may have a cooling circuit (34), a heat exchanger (38) associated with the cooling circuit, and a sensor (48) configured to generate a signal indicative of a temperature of the cooling circuit. The cooling system may also have a fan (40) mechanically driven by the engine to direct air through the cooling circuit, and a controller (46) in communication with the sensor and the engine. The controller may be configured to adjust a speed of the engine based on the signal.
Abstract:
A heat exchange system for a power machine that has an engine compartment and a heat exchanger compartment is discussed. The heat exchange system includes a fan housing located between the heat exchanger compartment and the engine compartment. A fan assembly that includes an axial fan and a radial fan coupled to a center shaft having a longitudinal axis extending through the center shaft is positioned within the fan housing. The fan assembly is operably coupled to a fan drive mechanism that is configured to cause the fan assembly to rotate about the longitudinal axis in a first direction and a second direction. First and second control signals from a controller cause the drive mechanism to rotate in the first and second directions, respectively.