Dynamic Cylinder Deactivation with Residual Heat Recovery
First Claim
1. A method for deactivating cylinders in a multiple cylinder internal combustion engine with electronically controlled multiple point fuel injection comprising:
- (a) deactivating individual cylinders by interrupting fuel injections electronically;
(b) deactivating only one cylinder at any moment of engine operation sequence;
(c) deactivating only one cycle for each cylinder at each deactivation;
(d) reactivating every deactivated cylinder right after every single cycle deactivation;
(e) deactivating every individual cylinder within the engine dynamically;
(f) deactivating every individual cylinder within the engine alternatively;
(g) deactivating only active hot cylinders that have just burned with air-fuel mixture during the previous engine cycle(s);
(h) deactivating individual cylinders in a way to keep engine thermal balance between cylinders;
(i) deactivating individual cylinders in a way to keep engine mechanical balance between cylinders;
(j) deactivating individual cylinders in a way to keep even deactivation space along engine operation sequence;
(k) deactivating individual cylinders in a way to keep best engine overall torque balance;
(l) keeping both intake and exhaust valves operating with original working sequence;
(m) utilizing inhaled fresh air as secondary engine working fluid inside deactivated cylinders;
(n) recovering residual heat inside deactivated cylinders;
(o) expanding air to extract additional mechanical work through deactivated cylinders; and
(p) performing forced internal air-cooling inside the deactivated cylinders.
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Accused Products
Abstract
Cylinder deactivation is a proven solution to improve engine fuel efficiency. The present invention is related to Dynamic Cylinder Deactivation (DCD) solution to conventional internal combustion engine. DCD is an energy saving method based on engine thermodynamics and residual heat recovery. It deactivates all the cylinders within the engine alternatively and dynamically, totally different from traditional sealed-valves cylinder deactivation solutions. DCD has many advantages over traditional sealed-valves cylinder deactivation. Thermodynamic efficiency gain, residual heat recovery, high Lambda and “Air-Hybrid” are the most attractive features of DCD. DCD also makes engine displacement variable.
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Citations
20 Claims
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1. A method for deactivating cylinders in a multiple cylinder internal combustion engine with electronically controlled multiple point fuel injection comprising:
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(a) deactivating individual cylinders by interrupting fuel injections electronically; (b) deactivating only one cylinder at any moment of engine operation sequence; (c) deactivating only one cycle for each cylinder at each deactivation; (d) reactivating every deactivated cylinder right after every single cycle deactivation; (e) deactivating every individual cylinder within the engine dynamically; (f) deactivating every individual cylinder within the engine alternatively; (g) deactivating only active hot cylinders that have just burned with air-fuel mixture during the previous engine cycle(s); (h) deactivating individual cylinders in a way to keep engine thermal balance between cylinders; (i) deactivating individual cylinders in a way to keep engine mechanical balance between cylinders; (j) deactivating individual cylinders in a way to keep even deactivation space along engine operation sequence; (k) deactivating individual cylinders in a way to keep best engine overall torque balance; (l) keeping both intake and exhaust valves operating with original working sequence; (m) utilizing inhaled fresh air as secondary engine working fluid inside deactivated cylinders; (n) recovering residual heat inside deactivated cylinders; (o) expanding air to extract additional mechanical work through deactivated cylinders; and (p) performing forced internal air-cooling inside the deactivated cylinders. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A dynamic cylinder deactivation control apparatus comprising:
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(a) means for deactivating individual cylinders by interrupting fuel injections electronically; (b) means for deactivating only one cylinder at any moment of engine operation sequence; (c) means for deactivating only one cycle for each cylinder at each deactivation; (d) means for reactivating every deactivated cylinder right after every single cycle deactivation; (e) means for deactivating every individual cylinder within the engine dynamically; (f) means for deactivating every individual cylinder within the engine alternatively; (g) means for deactivating only active hot cylinders that have just burned with air-fuel mixture during the previous engine cycle(s); (h) means for deactivating individual cylinders in a way to keep engine thermal balance between cylinders; (i) means for deactivating individual cylinders in a way to keep engine mechanical balance between cylinders; (j) means for deactivating individual cylinders in a way to keep even deactivation space along engine operation sequence; (k) means for deactivating individual cylinders in a way to keep best engine overall torque balance; (l) means for keeping both intake and exhaust valves operating with original working sequence; (m) means for utilizing inhaled fresh air as secondary engine working fluid inside deactivated cylinders; (n) means for recovering residual heat inside deactivated cylinders; (o) means for expanding air to extract additional mechanical work through deactivated cylinders; and (p) means for performing forced internal air-cooling inside the deactivated cylinders.
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12. An apparatus for dynamic cylinder deactivation control comprising:
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original engine control module; original engine fuel injection devices; DCD control module; DCD control handle switch; DCD control display, in digital, numerical or alphabetical form; engine ignition switch; at least one, but not limited to one, wideband Lambda sensor; at least one, but not limited to one, wideband Lambda sensor controller; at least one, but not limited to one, wideband Lambda sensor signal processing circuit; at least one, but not limited to one, engine radiator fan; at least one, but not limited to one, engine temperature control device; and at least one, but not limited to one, interconnection adapter. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification