Internal combustion engine with variable camshaft timing, charge motion control valve, and variable air/fuel ratio
AssigneeFord Global Technologies, LLC
InventorsJames Ryland Clarke, Robert Albert Stein
Life of this patent
Estimating the term…
Abstract
A reciprocating internal combustion engine has at least one camshaft for actuating intake and exhaust valves and a camshaft drive for rotating the camshaft and for adjusting the rotational timing of the camshaft with respect to the crankshaft. A charge motion control valve and the variable camshaft timing mechanism are both used to selectively impart angular momentum to charge entering the engine's cylinder(s).
Claims21
A reciprocating internal combustion engine having at least one cylinder with a piston, a crankshaft, a connecting rod joining the piston and the crankshaft, an intake manifold, and intake and exhaust poppet valves servicing the cylinder, with said engine further comprising:
- a single camshaft for actuating said intake and exhaust valves;
- a camshaft drive for rotating the camshaft and for adjusting the rotational timing of the camshaft with respect to the crankshaft, with the camshaft having a base timing;
- a charge motion control valve for selectively imparting angular momentum to charge entering the cylinder;
- and
- a controller for operating the camshaft drive and the motion control valve, with the controller operating the camshaft drive to progressively retard the camshaft timing until the engine reaches a predetermined operating condition corresponding to maximum practicable retard.
A reciprocating internal combustion engine having at least one cylinder with a piston, a crankshaft, a connecting rod joining the piston and the crankshaft, an intake manifold, and intake and exhaust poppet valves servicing the cylinder, with said engine further comprising:
- a single camshaft for actuating said intake and exhaust valves of said at least one cylinder;
- a camshaft drive for rotating the camshaft and for adjusting the rotational timing of the camshaft with respect to the crankshaft, with the camshaft having a base timing;
- a charge motion control valve for selectively imparting angular momentum to charge entering the cylinder;
- and
- a controller connected with a plurality of sensors for sensing engine operating condition and for operating the camshaft drive to progressively retard the camshaft timing until the engine reaches a predetermined operating condition corresponding to maximum practicable retard.
Dependencies are inferred from the claim text.