Abstract: A computer-implemented method to retrieve results for a travel search task executed on a computer system hosting a travel meta-search engine comprises obtaining a travel search task specifying one or more values of each search task parameter of a set travel search task parameters, obtaining search task normalization information for the search task, normalizing the search task, wherein normalizing the search task includes adapting at least one search parameter of the search task based on the search task normalization information, determining a cache key corresponding to the normalized travel search task, determining if a cache of the computer system hosting a travel meta-search engine includes a search result for the normalized search task, the cache including search results of previous travel search tasks indexed by a cache key and if the cache includes a search result for the normalized search task, retrieving the search result from the cache.

Abstract: Among other things, information is received from a user interacting with a user interface about a trip that is being planned from an origin to a destination, the information including a user indication of travel modes to be considered in planning the trip and the possible travel modes including at least three of bus, train, car, water, and air. Two or more alternative travel options are determined each including two or more of the modes based on the received information; and the options are presented to the user through the user interface.

Abstract: Various “no filter, no run” fuel filtration designs are described that include a variable restriction orifice (VRO) designed to vary the amount of fluid, for example fuel, that reaches a fluid outlet. The VRO has a fully open position at which a maximum non-zero fluid flow is permitted, and a fully closed position at which a limited amount of fluid can flow to the outlet. In the case of diesel fuel, the amount of fuel flow permitted at the fully closed position provides lubrication of downstream fuel system components, for example the fuel pump, but is insufficient to permit engine operation.

Abstract: Among other things, information is received from a user interacting with a user interface about a trip that is being planned from an origin to a destination, the information including a user indication of travel modes to be considered in planning the trip and the possible travel modes including at least three of bus, train, car, water, and air. Two or more alternative travel options are determined each including two or more of the modes based on the received information; and the options are presented to the user through the user interface.

Abstract: A filtration system, for example a fuel filtration system in an engine, that helps prevent engine operation when there is no filter cartridge installed or a non-recommended and/or inferior filter cartridge is installed. The filter cartridge includes first and second endplates, one of which includes a fluid flow passage therein through which fluid can flow. The flow passage connects the clean fluid from the filter to a clean fluid outlet.

Abstract: Various “no filter, no run” fuel filtration designs are described that include a variable restriction orifice (VRO) designed to vary the amount of fluid, for example fuel, that reaches a fluid outlet. The VRO has a fully open position at which a maximum non-zero fluid flow is permitted, and a fully closed position at which a limited amount of fluid can flow to the outlet. In the case of diesel fuel, the amount of fuel flow permitted at the fully closed position provides lubrication of downstream fuel system components, for example the fuel pump, but is insufficient to permit engine operation.

Abstract: A filtration system, for example a fuel filtration system in an engine, that helps prevent engine operation when there is no filter cartridge installed or a non-recommended and/or inferior filter cartridge is installed. The filter cartridge includes first and second endplates, one of which includes a fluid flow passage therein through which fluid can flow. The flow passage connects the clean fluid from the filter to a clean fluid outlet.

Abstract: A combined filter apparatus includes a first filter element, a second filter element disposed in stacking arrangement to the first filter element, a housing enclosing the filter elements, a seal sealing the dirty side of the first filter element from the dirty side of the second filter element, a first inlet disposed in the housing for fluid flow to the first filter element, a second inlet disposed in the housing for fluid flow to the second filter element, and an outlet disposed in the housing for fluid flow from at least one of the filter elements.