Fuel ratio control with manually operated air override
AssigneeCaterpillar Tractor Co.
InventorJoseph P. Little, Jr.
Life of this patent
Estimating the term…
Abstract
An engine fuel-control system having fuel-limiting means for controlling and/or limiting the quantity of fuel delivered to an engine in response to a signal generated by operation of the engine is provided with selectively adjustable overriding means for the fuel-limiting means.
Claims8
In an engine fuel-control system having fuel-limiting means for controlling and limiting the quantity of fuel delivered to the engine in response to a signal generated by pressure in a manifold by operation of the engine to an expansible chamber of said system, the improvement comprising means for overriding said fuel-limiting means comprising
- pressure-responsive means connected to said fuel-limiting means and responsive to pressure variations in said expansible chamber for controlling actuation of said fuel-limiting means;
- an auxiliary source of fluid pressure independent of pressure in said manifold;
- and
- control means for adjustably directing pressurized fluid from said auxiliary source to said pressure-responsive means so that said pressure-responsive means acts in opposition to and overrides said fuel-limiting means, including adjustable valve means for selectively communicating pressurized fluid from said auxiliary source to said expansible chamber.
In an engine fuel-control system having fuel-limiting means for controlling the quantity of fuel delivered to an engine in response to a variable pressure prevalent in a manifold of said engine communicating with an expansible chamber of said system, the improvement comprising means, including an auxiliary source of fluid pressure independent of the pressure in said manifold and connected to said expansible chamber and adjustable valve means for selectively communicating said auxiliary source of fluid pressure with said expansible chamber, for selectively overriding said fuel limiting means in response to communication of said auxiliary source of fluid pressure thereto.
Dependencies are inferred from the claim text.