Injector cleaning/testing apparatus
AssigneeAutomated Engineering Systems Limited
InventorRobert Hartopp
Life of this patent
Estimating the term…
Abstract
Injector cleaning/testing apparatus is arranged to enable electrically actuated injectors to be cleaned and tested while in situ on an engine. The apparatus is connected to the fuel supply system of the engine which feeds fuel and/or cleaning fluid to the engine injectors. Measuring means is also provided for measuring the rate of flow of fuel through the injectors. Fuel is pumped to pressurize the supply of fuel to the injectors; the pressure is measured and the rate of change of the pressure is determined as an injector is opened thereby determining the rate of flow through the injector. The apparatus also includes an arrangement whereby the engine fuel supply pump is used during cleaning and an arrangement by which the injectors may be actuated in different modes without disconnection.
Claims9
Injector cleaning/testing apparatus comprising supply means for connection with the fuel supply system of a vehicle, the supply means being arranged to feed fuel and/or cleaning fluid to the fuel supply system for discharge through vehicle fuel supply injectors;
- actuating means for the injectors whereby the injectors are individually actuable;
- measuring means for measuring the rate of flow of fuel through individual injectors;
- and control means for controlling the operation of the supply means, the actuating means and the measuring means;
- the measuring means including pump means for pressurizing the supply of fuel to the injectors, valve means for isolating the pressurized fuel supply, and pressure measuring means for measuring the pressurized fuel supply to the injectors, the pressure measuring means being coupled to calculating means whereby the rate of change of pressure detected by the measuring means is calculated so that when the valve means is operated and the injector is actuated to an open condition to pass the pressurized fuel therethrough the calculating means provides a signal according to the rate of change of the fuel pressure which corresponds to the rate of flow of fuel through the injector.
Dependencies are inferred from the claim text.