Engine expansion braking with adjustable valve timing
First Claim
1. A method for controlling operation of cylinder with at least an intake and exhaust valve and a piston, the engine in a vehicle, the method comprising:
- in response to a tip out, maintaining at least one of the intake and exhaust valves in a closed position during a period, and closing the other of the intake and exhaust valves with the piston at a first position from, and then opening the other of the intake and exhaust valves at a second position of the piston closer to bottom center than said first position, during said period.
2 Assignments
0 Petitions
Accused Products
Abstract
A system and method for controlling operation of cylinder with at least an intake and exhaust valve and a piston are described. In one aspect, the method comprises maintaining at least one of the intake and exhaust valves in a closed position during a period. Further, closing the other of the intake and exhaust valves with the piston at a first position from, and then opening the other of the intake and exhaust valves at a second position of the piston closer to bottom center than said first position, during said period.
28 Citations
20 Claims
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1. A method for controlling operation of cylinder with at least an intake and exhaust valve and a piston, the engine in a vehicle, the method comprising:
in response to a tip out, maintaining at least one of the intake and exhaust valves in a closed position during a period, and closing the other of the intake and exhaust valves with the piston at a first position from, and then opening the other of the intake and exhaust valves at a second position of the piston closer to bottom center than said first position, during said period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A computer readable storage medium having instructions therein for controlling operation of cylinder with at least an intake and exhaust valve and a piston, the engine in a vehicle, the medium comprising:
instructions for, in response to a driver tip out, maintaining at least one of the intake and exhaust valves in a closed position during a period, and operating the other of the intake and exhaust valves in open position, then closing the other of the intake and exhaust valves from said open position with the piston at a first position, and then opening the other of the intake and exhaust valves at a second position of the piston closer to bottom center than said first position, during said period. - View Dependent Claims (13, 14, 15, 16)
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17. A system for a cylinder of an engine of a passenger vehicle on the road, comprising:
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a cylinder with at least an intake and exhaust valve and a piston;
a camshaft adapted to actuate said exhaust valve of said cylinder;
an electromechanical actuator adapted to actuate said intake valve of said cylinder;
a plastic intake manifold coupled to said cylinder; and
a controller for, in response to a driver tip out, and during a period with said exhaust valve substantially closed;
operating with the intake valve open, then closing the intake valve with the piston at a first position, and then opening the intake valve at a second position of the piston closer to bottom center than said first position. - View Dependent Claims (18, 19)
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20-21. -21. (canceled)
Specification