Method for controlling an internal combustion engine system
AssigneeVolvo Truck Corporation
InventorsLennart Andersson, Arne Andersson, Bengt Johansson, Staffan Lundgren, Nhut Lam
Life of this patent
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Abstract
A method for controlling an internal combustion engine system, the engine system including a combustor arranged to receive air and fuel, and combust the received air and fuel, an expander arranged to expand exhaust gases from the combustion in the combustor and to extract energy from the expanded exhaust gases, and a communication valve arranged to control a communication between the combustor and the expander, including determining during operation of the engine system whether there is a pressure difference across said communication valve.
Claims22
A method for controlling an internal combustion engine system comprising
- a combustor arranged to receive air and fuel, and combust the received air and fuel,
- an expander arranged to expand exhaust gases from the combustion in the combustor and to extract energy from the expanded exhaust gases, and
- an exhaust guide arranged to guide exhaust gases from the combustor to the expander,
- an expander inlet valve arranged to control a communication between the exhaust guide and the expander, and
- an air guide arranged to guide air to the combustor,
- the method comprising controlling the expander inlet valve so as to adjust the pressure in the exhaust guide, comprising determining the pressure in the exhaust guide, whereby the control of the expander inlet valve comprises controlling the expander inlet valve at least partly based on the determined pressure in the exhaust guide, and further
- determining the pressure in the combustor comprises determining a temperature, a pressure and/or an air mass flow in the air guide, and determining an amount of fuel provided to the combustor, and determining the pressure in the combustor at least partly based on the determined air guide temperature, pressure and/or air mass flow, and the determined fuel amount.
An internal combustion engine system comprising a combustor arranged to receive air and fuel, and combust the received air and fuel,
- an expander arranged to expand exhaust gases from the combustion in the combustor and to extract energy from the expanded exhaust gases,
- an exhaust guide arranged to guide exhaust gases from the combustor to the expander, and
- an expander inlet valve arranged to control a communication between the exhaust guide and the expander,
- an air guide arranged to guide air to the combustor,
- wherein the engine system comprises pressure determining means arranged to determine the pressure in the exhaust guide, the expander inlet valve being arranged so as to present a variable and controllable opening sequence, and further determining the pressure in the combustor comprises determining a temperature, a pressure and/or an air mass flow in the air guide, and determining an amount of fuel provided to the combustor, and determining the pressure in the combustor at least partly based on the determined air guide temperature, pressure and/or air mass flow, and the determined fuel amount.
Dependencies are inferred from the claim text.