Abstract: A filler neck for a fuel tank used on busses achieves higher filling rates by varying the geometry and cross sectional size of the filler neck depending on local slope of the neck and available space to fit the neck, particularly between a bus chassis frame rail and the bus body floor.

Abstract: Each of two fuel tanks is disposed at a respective side of a chassis of a motor vehicle and has a respective sender for indicating the level of liquid fuel in the respective tank. A pump draws fuel from the tanks through a respective fuel draw conduit. Excess fuel is returned to each tank through a respective fuel return conduit. When the senders indicate an imbalance of fuel between the two tanks, a valve mechanism controlled by the senders disallows return fuel flow to the tank whose sender indicates that the level of fuel is greater than that indicated by the sender of the other tank by some defined amount while the pump continues to draw fuel from both tanks through the fuel draw conduits.

Abstract: Each of two fuel tanks is disposed at a respective side of a chassis of a motor vehicle and has a respective sender for indicating the level of liquid fuel in the respective tank. A pump draws fuel from the tanks through a respective fuel draw conduit. Excess fuel is returned to each tank through a respective fuel return conduit. When the senders indicate an imbalance of fuel between the two tanks, a valve mechanism controlled by the senders disallows return fuel flow to the tank whose sender indicates that the level of fuel is greater than that indicated by the sender of the other tank by some defined amount while the pump continues to draw fuel from both tanks through the fuel draw conduits.

Abstract: An ambient air-to-engine fluid heat exchanger, vehicle having independent ambient air modulators are provided for both the radiator and the charge air cooler in the form of an apertured plate mounted adjacent the face of the heat exchanger and controllably slidable to bring the plate apertures in registry with the ambient air openings of the heat exchanger. For the heat exchanger for engine coolant, the front face of the heat exchanger comprises a second plate having the heat exchanger ambient air openings therein. For the charge air cooler, a second plate is unnecessary because, in an air-to-air heat exchanger, the charge air tubes are about the same width as the ambient air passages and thus the tubes can block the air flow through the modulator apertures when the plate is positioned to do so. The modulator plate is further preferably provided with integral louver portions between the apertures for channelling and streamlining the ambient air flow into the apertures and heat exchanger.

Abstract: An ambient air-to-engine fluid heat exchanger, preferably a charge air cooler, for a vehicle having an ambient air modulator in the form of an apertured plate mounted adjacent the face of the heat exchanger and controllably slidable to bring the plate apertures in registry with the ambient air openings of the heat exchanger. If the heat exchanger is for engine coolant, the front face of the heat exchanger comprises a second plate having the heat exchanger ambient air openings therein. If it is a charge air cooler, a second plate is unnecessary because, in an air-to-air heat exchanger, the charge air tubes are about the same width as the ambient air passages and thus the tubes can block the air flow through the modulator apertures when the plate is positioned to do so. The modulator plate is further preferably provided with integral louver portions between the apertures for channelling and streamlining the ambient air flow into the apertures and heat exchanger.