The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 23, 1988
Filed:
Jun. 30, 1986
Rudolf Diener, Zurich, CH;
Kwik Products International Corp., Portland, OR (US);
Abstract
An airstream driven rotor assembly with a centrifugal pump forcing a measured fuel quantity through a fixed orifice in direct substantially linear proportion to rotor speed and thus to airstream volume. The ultimate fuel-air ratio is corrected for optimum operation by slightly changing, in response to measured parameters, one of the mixture constituents. In one embodiment, the fuel discharge bore (9) of a rotor (7) is dimensioned that the rotor carburetor (2) produces a lean mixture with a .lambda.-value which is constant for all operating points approximately 1.25. For fuel-air ratio correction additional fuel is brought into atomization ring (11) of rotor (7), by which the fuel-air ratio in the lean mixture is changed and at the engine operating points the .lambda.-values are adjusted to give most favorable fuel consumption, output and pollution. The fuel-air ratio correction apparatus includes a regulated injection pump (20) with an injection nozzle (39a) directed at the internal wall (13) of the atomization ring (11) with approximately 50 mm.sup.3 of additional fuel delivered per stroke, and a regulating device (50) with a pulse generator (40) for driving injection pump (20) with pulses of regulated frequency. The regulation of repetition frequency is controlled by control signal generators in dependence on operating parameters of the engine such as opening of the throttle valve (18) for acceleration correction, coolant temperature for the cold start correction, etc. In other embodiments, the air volume is reduced to enrich the mixture, and in another, the air velocity is increased to enrich the mixture.