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AssigneeVolvo Lastvagnar AB
InventorsSixten BERGLUND, Anders ERIKSSON, Marcus STEEN, Soren UDD
Estimating the term…
A vehicle having a combustion engine supercharged by a turbocharger (6) with variable turbine geometry and having electronic control members (3) controlling the supply of fuel and air to the combustion chamber of the engine. The control members are designed, during forward travel of the vehicle, on the basis of input information on at least road gradient and gas pedal position, to estimate future road resistance and the time period up to a future transient in the operating condition of the engine. The control members are designed to control changes in the turbine geometry during the time period so as to optimize the response of the engine when the transient arises.
A method, in a supercharged combustion engine in a vehicle, during forward travel of the vehicle, of regulating geometric changes in the supercharge system of the engine which promote changes in the boost pressure of the engine, wherein the future road resistance of the vehicle is calculated and the time period to a future transient in the operating condition of the engine (1) is estimated and necessary geometric changes in the supercharge system (6,11,15) of the engine are affected during this time period to optimize the response of the engine when the transient arises.
A vehicle having a supercharged combustion engine (1) with electronic control members (3) controlling the supply of fuel and air to the combustion chamber of the engine, wherein the control members (3) are designed, during forward travel of the vehicle, on the basis of input information on at least road gradient and gas pedal position, to estimate future road resistance and the time period to a future transient in the operating condition of the engine and to control geometric changes in the supercharge system (6,11,15) of the engine during the time period thereby optimizing the response of the engine when the transient arises.
The vehicle as recited in 7, further comprising an automatic transmission (2) coupled to the engine (1) and wherein the control members (3) have an engine and transmission control function configured to estimate the time period to a future gearshift and to control the geometric changes in the supercharge system (6,11,15) so that the boost pressure is actively changed prior to the initiation of the gearshift.
The vehicle as recited in 8, further comprising an automatic transmission (2) coupled to the engine (1) and wherein the control members (3) have an engine and transmission control function configured to estimate the time period to a future gearshift and to control the geometric changes in the supercharge system (6,11,15) so that the boost pressure is actively changed prior to the initiation of the gearshift.
The vehicle as recited in 9, further comprising an automatic transmission (2) coupled to the engine (1) and wherein the control members (3) have an engine and transmission control function configured to estimate the time period to a future gearshift and to control the geometric changes in the supercharge system (6,11,15) so that the boost pressure is actively changed prior to the initiation of the gearshift.
The vehicle as recited in 10, further comprising an automatic transmission (2) coupled to the engine (1) and wherein the control members (3) have an engine and transmission control function configured to estimate the time period to a future gearshift and to control the geometric changes in the supercharge system (6,11,15) so that the boost pressure is actively changed prior to the initiation of the gearshift.
Dependencies are inferred from the claim text.