Abstract: A debris collection vehicle having an enclosed volume for collecting debris and a hydraulic fan drive system for creating vacuum condition in the enclosed volume is disclosed. In one embodiment, the hydraulic fan system includes a closed loop hydraulic circuit, a variable displacement hydraulic pump disposed within the closed loop circuit, and a hydraulic motor disposed within the closed loop circuit. The hydraulic fan drive system can also include an electronic or hydraulically actuated control valve constructed and arranged to adjust the output of the hydraulic motor via a displacement actuator based on pressure in the closed loop hydraulic circuit.

Abstract: A debris collection vehicle having an enclosed volume for collecting debris and a hydraulic fan drive system for creating vacuum condition in the enclosed volume is disclosed. In one embodiment, the hydraulic fan system includes a closed loop hydraulic circuit, a variable displacement hydraulic pump disposed within the closed loop circuit, and a hydraulic motor disposed within the closed loop circuit. The hydraulic fan drive system can also include an electronic or hydraulically actuated control valve constructed and arranged to adjust the output of the hydraulic motor via a displacement actuator based on pressure in the closed loop hydraulic circuit.

Abstract: A power delivery system for a vehicle is disclosed. In one embodiment, the power delivery system includes a chassis engine configured to power driving functions of the vehicle and an auxiliary engine configured to power non-driving hydraulic functions of the vehicle. The power delivery system may also include a power boost system comprising a hydraulic pump and a hydraulic motor in fluid communication with each other. The hydraulic pump may be coupled to a power output of the chassis engine while the hydraulic motor may be coupled to a power output of the auxiliary engine. In one embodiment, the power delivery system has a power sharing mode in which power is transferred from the chassis engine power output to the auxiliary engine power output via the hydraulic pump and motor such that the non-driving hydraulic functions of the vehicle are simultaneously powered by the chassis engine and the auxiliary engine.

Abstract: A power delivery system for a vehicle is disclosed. In one embodiment, the power delivery system includes a chassis engine configured to power driving functions of the vehicle and an auxiliary engine configured to power non-driving hydraulic functions of the vehicle. The power delivery system may also include a power boost system comprising a hydraulic pump and a hydraulic motor in fluid communication with each other. The hydraulic pump may be coupled to a power output of the chassis engine while the hydraulic motor may be coupled to a power output of the auxiliary engine. In one embodiment, the power delivery system has a power sharing mode in which power is transferred from the chassis engine power output to the auxiliary engine power output via the hydraulic pump and motor such that the non-driving hydraulic functions of the vehicle are simultaneously powered by the chassis engine and the auxiliary engine.

Abstract: A paver or other apparatus used to convey paving material is provided with a conduit including a hood and a duct for directing fumes from the paving material to a fume processor. A paver having an extendable screed or other moving parts is equipped with a roll of screen material. The screen material is unrolled and fastened over the extended screed to contain and direct the fumes to the conduit. The fumes are burned in an engine of the paver or otherwise processed to remove or reduce noxious components thereof.