Internal combustion engine with variable camshaft timing, charge motion control valve, and variable air/fuel ratio
First Claim
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1. 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.
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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).
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Citations
21 Claims
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1. 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:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. 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:
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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. - View Dependent Claims (17, 18, 19, 20, 21)
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Specification