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US 9,605,603 B2Granted
Position detection for lobe switching camshaft system
AssigneeFord Global Technologies, LLC
InventorsChris Paul Glugla, Jeffrey Allen Doering, Michael James Uhrich
Life of this patent
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Abstract
Systems and methods for determining an active cam profile from a plurality of cam profiles is disclosed. The systems and methods may be used to determine how to operate an engine torque actuator or provide an indication of cam profile switching degradation.
Claims20
A method for determining engine state, comprising:
- commanding a cam sleeve to move axially;
- providing a signal indicative of a presence or an absence of the cam sleeve moving axially, the signal provided responsive to comparing rotation of a feature of the cam sleeve to a camshaft position;
- and
- adjusting an engine actuator responsive to the signal.
1 more element
A method for determining engine state, comprising:
- commanding a cam sleeve to move axially;
- comparing a camshaft profile sensor output to a camshaft position sensor output to determine a presence or an absence of the cam sleeve moving axially;
- and
- adjusting an engine actuator in response to determining the presence of axial movement of the cam sleeve.
1 more element
A cam profile detection system, comprising:
- an engine torque actuator;
- a camshaft including an axially movable sleeve;
- a first pin and a second pin selectively activated via an actuator;
- a rotation sensing camshaft position sensor;
- a rotation sensing camshaft profile sensor;
- and
- a controller including executable instructions stored in non-transitory memory for:
- comparing output from the rotation sensing camshaft profile sensor to output from the rotation sensing camshaft position sensor, and
- adjusting the engine torque actuator responsive to a position of the axially movable sleeve as determined from the comparison of the rotation sensing camshaft profile sensor and the rotation sensing camshaft position sensor.
6 more elements
Dependencies are inferred from the claim text.