Abstract: A fastener retention system, including for a filter housing, applies an axial retention force in a plastic molded structure having a bore in a standing tower extending along an axis. A fastener extends axially in the bore and has a first axial end retained in the bore in snap fit relation, and a second distally opposite axial end extending axially beyond the bore for mating with a retaining member holding a cover on a base in a filter application in assembled condition. The fastener is secured to the tower in permanent snap fit relation. The fastener is axially slid into the bore before crystallization and hardening of the plastic. The fastener is axially trapped in the bore between spaced facing abutments, and is anti-rotationally keyed thereto.

Abstract: A fuel and water injection system for an internal combustion engine in which a computer calculates the minimum fuel requirements to meet power demand and the water injection requirements to achieve smooth operation without engine knock or pre-ignition; and triggers electronic injectors mounted in the intake manifold or adjacent to the cylinders to achieve those requirements. Fuel and water injectors are connected to constant-pressure fluid supply systems such that the rate of delivery of liquid to the inlet manifold or cylinder is based on the pulse width and pulse repetition rate of the signals sent from the computer. The fuel/air ratio ranges from the minimum requirement to support the combustion process to the maximum which can be burned cleanly and efficiently. Fuel injection rates within these limits are based on the operator's demand for power as represented by his positioning of the throttle plate using the accelerator.

Abstract: A corrugated seal for connecting two relatively movable structures and for conducting fluid between the two structures. The corrugations of the seal are arranged at a sloping angle in the direction of fluid flow to prevent the accumulation of fluid in the folds of the corrugations.