System for controlling electromechanical valves in an engine
First Claim
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1. A system for electronically actuating valves in an internal combustion engine, comprising:
- a first voltage source;
a second voltage source;
plural cylinder valve actuator subsystems coupled between the first voltage source and the second voltage source, each having a valve actuator and a switch configured to selectively control application of voltage to the valve actuator to thereby selectively control energization of the valve actuator;
a dissipation switch operatively coupled with the valve actuator subsystems, the dissipation switch being selectively operable to control dissipation of energy from any of the valve actuators;
wherein the second voltage source is connected in parallel with the plural valve actuator subsystems; and
wherein freewheel current from each of the plural valve actuator subsystems is configured to be recycled though the second voltage source and made available to any of the plural valve actuator subsystems, the second voltage source not being a battery.
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Abstract
A system for electronically actuating valves in an engine. The system includes first and second voltage sources, and a plurality of valve actuator subsystems coupled therebetween. Each valve actuator subsystem has a valve actuator and a switch configured to selectively control application of voltage to the valve actuator to thereby selectively control energization of the valve actuator. The system also includes a dissipation switch operatively coupled with the valve actuator subsystems, the dissipation switch being selectively operable to control dissipation of energy from any of the valve actuators.
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Citations
24 Claims
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1. A system for electronically actuating valves in an internal combustion engine, comprising:
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a first voltage source; a second voltage source; plural cylinder valve actuator subsystems coupled between the first voltage source and the second voltage source, each having a valve actuator and a switch configured to selectively control application of voltage to the valve actuator to thereby selectively control energization of the valve actuator; a dissipation switch operatively coupled with the valve actuator subsystems, the dissipation switch being selectively operable to control dissipation of energy from any of the valve actuators; wherein the second voltage source is connected in parallel with the plural valve actuator subsystems; and wherein freewheel current from each of the plural valve actuator subsystems is configured to be recycled though the second voltage source and made available to any of the plural valve actuator subsystems, the second voltage source not being a battery. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system for electronically actuating valves in an internal combustion engine, comprising:
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a first voltage source; a second voltage source; a first bank of valve actuator subsystems coupled between the first voltage source and the second voltage source, each having a valve actuator and a switch and configured so that, during operation, current flows from the first voltage source through the valve actuator when the switch is in a first position, and when the switch is in a second position, current is permitted to flow from the valve actuator to the second voltage source; a second bank of valve actuator subsystems coupled between the first voltage source and the second voltage source, each having a valve actuator and a switch and configured so that, during operation, current flows from the second voltage source through the valve actuator when the switch is in a first position, and when the switch is in a second position, current is permitted to flow from the valve actuator to the first voltage source; and a dissipation switch selectively operable to vary dissipation of freewheel current from at least some of the valve actuators. - View Dependent Claims (13, 14, 15)
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16. An internal combustion engine, comprising:
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a plurality of cylinders, each having one or more valves that are selectively openable and closable; and a system for electronically actuating the valves, the system including; a first voltage source; a second voltage source; plural cylinder valve actuator subsystems coupled between the first voltage source and the second voltage source, each having a valve actuator and a switch configured to selectively control application of voltage to the valve actuator to thereby selectively control energization of the valve actuator; a dissipation switch operatively coupled with the valve actuator subsystems, the dissipation switch being selectively operable to control dissipation of energy from any of the valve actuators; and wherein freewheel current from each of the plural valve actuator subsystems is configured to be recycled though the second voltage source and made available to any of the plural valve actuator subsystems through a continuously connected current path. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24)
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Specification