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US 7,607,302 B2Granted
Automotive turbocharger systems
AssigneeRicardo UK Limited
InventorsMalcolm Fry, Richard C. E. Cornwell, Richard King, Matthew Gerard Beasley
Life of this patent
Estimating the term…
Abstract
A turbocharger system comprising first and second turbochargers, configured in series, where the turbochargers hand over control from one turbocharger to the other, which incorporates switching adjustment terms at the point of transition to ensure a smooth transition.
Claims7
A method of controlling a turbo charger system having first and second turbo chargers with respective first and second operational ranges, comprising:
- controlling a first turbo charger according to a first control scheme in a first operational range and slaving control of a second turbo charger to the first control scheme, and
- controlling the second turbo charger according to a second control scheme in a second operational range in which at a transition between the first and second control schemes, a switch term is incorporated into the second control scheme, wherein the first control scheme is a PID control scheme and the switch term is a measure of the proportional gain according to the second control scheme.
A control unit having a computer-readable medium encoded with a computer program configured to implement a method comprising:
- controlling a first turbo charger according to a first control scheme in a first operational range and slaving control of a second turbo charger to the first control scheme, and
- controlling the second turbo charger according to a second control scheme in a second operational range in which at a transition between the first and second control schemes, a switch term is incorporated into the second control scheme, wherein the first control scheme is a PID control scheme and the switch term is a measure of the proportional gain according to the second control scheme.
Dependencies are inferred from the claim text.