Control of vehicle driving force
First Claim
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1. An apparatus for controlling a vehicle driving force comprising:
- an input section for sensing a driver'"'"'s accelerator input quantity and a vehicle speed of a vehicle;
an output section for varying an actual vehicle driving force; and
a control section connected with said input section to receive input information therefrom, to determine, as a normal target driving force, a desired vehicle driving force on a level road in accordance with the accelerator input quantity and the vehicle speed, further to determine a vehicle grade resistance, to calculate a modification parameter in accordance with the vehicle grade resistance, and to determine a grade-adapted target driving force in accordance with the normal driving force and the modification parameter, the controller being further connected with said output section to achieve the grade-adapted target driving force with the output section;
wherein the input section comprises an accelerator input quantity sensing section for sensing the accelerator input quantity, and a vehicle speed sensing section for sensing the vehicle speed; and
wherein the control section comprises a normal driving force determining section for determining, as the normal driving force, the desired vehicle driving force on the level road in accordance with the accelerator input quantity and the vehicle speed, a vehicle weight grade resistance determining section for determining the vehicle grade resistance, a modification parameter calculating section for calculating the modification parameter in accordance with the grade resistance, and a grade-adapted target driving force calculating section for determining the grade-adapted target driving force in accordance with the normal driving force and the modification parameter;
wherein the modification parameter calculating section comprises a modification quantity calculating section for calculating a driving force modification quantity which is set at a predetermined percent of the grade resistance, the predetermined percent being smaller than 100%; and
wherein the grade-adapted target driving force calculating section determines the grade-adapted target driving force by adding the driving force modification quantity to the normal driving force.
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Abstract
A vehicle driving force control apparatus includes an element for calculating a normal target driving force representing a desired vehicle driving force on a level road in accordance with sensed accelerator input quantity and vehicle speed, an element for calculating a modification quantity in accordance with a vehicle grade resistance, an element for determining a grade-adapted target driving force in accordance with the normal driving force and the modification quantity. The grade-adapted target driving force is achieved in a vehicle to provide adequate feeling of acceleration even on an ascending slope.
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Citations
17 Claims
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1. An apparatus for controlling a vehicle driving force comprising:
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an input section for sensing a driver'"'"'s accelerator input quantity and a vehicle speed of a vehicle;
an output section for varying an actual vehicle driving force; and
a control section connected with said input section to receive input information therefrom, to determine, as a normal target driving force, a desired vehicle driving force on a level road in accordance with the accelerator input quantity and the vehicle speed, further to determine a vehicle grade resistance, to calculate a modification parameter in accordance with the vehicle grade resistance, and to determine a grade-adapted target driving force in accordance with the normal driving force and the modification parameter, the controller being further connected with said output section to achieve the grade-adapted target driving force with the output section;
wherein the input section comprises an accelerator input quantity sensing section for sensing the accelerator input quantity, and a vehicle speed sensing section for sensing the vehicle speed; and
wherein the control section comprises a normal driving force determining section for determining, as the normal driving force, the desired vehicle driving force on the level road in accordance with the accelerator input quantity and the vehicle speed, a vehicle weight grade resistance determining section for determining the vehicle grade resistance, a modification parameter calculating section for calculating the modification parameter in accordance with the grade resistance, and a grade-adapted target driving force calculating section for determining the grade-adapted target driving force in accordance with the normal driving force and the modification parameter;
wherein the modification parameter calculating section comprises a modification quantity calculating section for calculating a driving force modification quantity which is set at a predetermined percent of the grade resistance, the predetermined percent being smaller than 100%; and
wherein the grade-adapted target driving force calculating section determines the grade-adapted target driving force by adding the driving force modification quantity to the normal driving force.- View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus for controlling a vehicle driving force comprising:
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an input section for sensing a driver'"'"'s accelerator input quantity and a vehicle speed of a vehicle;
an output section for varying an actual vehicle driving force; and
a control section connected with said input section to receive input information therefrom, to determine, as a normal target driving force, a desired vehicle driving force on a level road in accordance with the accelerator input quantity and the vehicle speed, further to determine a vehicle grade resistance, to calculate a modification parameter in accordance with the vehicle grade resistance, and to determine a grade-adapted target driving force in accordance with the normal driving force and the modification parameter, the controller being further connected with said output section to achieve the grade-adapted target driving force with the output section;
wherein the input section comprises an accelerator input quantity sensing section for sensing the accelerator input quantity, and a vehicle speed sensing section for sensing the vehicle speed; and
wherein the control section comprises a normal driving force determining section for determining, as the normal driving force, the desired vehicle driving force on the level road in accordance with the accelerator input quantity and the vehicle speed, a vehicle weight grade resistance determining section for determining the vehicle grade resistance, a modification parameter calculating section for calculating the modification parameter in accordance with the grade resistance, and a grade-adapted target driving force calculating section for determining the grade-adapted target driving force in accordance with the normal driving force and the modification parameter;
wherein the modification parameter calculating section comprises a grade adapted reference driving force setting section for calculating a grade-adapted reference driving force which is a sum of the normal driving force and a predetermined percent of a predetermined standard grade resistance, the predetermined percent being smaller than 100%, and an interpolation coefficient calculating section for calculating an interpolation coefficient in accordance with the vehicle grade resistance and the standard grade resistance; and
wherein the grade-adapted target driving force calculating section determines the grade-adapted target driving force by interpolation with the interpolation coefficient between the normal driving force and the grade-adapted reference driving force.- View Dependent Claims (9, 10, 11)
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12. A vehicle comprising:
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an output section comprising a prime mover for varying an actual driving force of the vehicle;
an input section for collecting input information on vehicle operating conditions of the vehicle, said input section comprising a vehicle speed sensor for sensing a vehicle speed of the vehicle, and an accelerator sensor for sensing a driver'"'"'s accelerator input quantity; and
a control section comprising a controller for determining, as a normal target driving force, a desired vehicle driving force on a level road in accordance with the accelerator input quantity and the vehicle speed, for determining a vehicle grade resistance in accordance with the input information, for calculating a driving force modification quantity in accordance with the vehicle grade resistance, for determining a grade-adapted target driving force which is equal to a sum of the driving force modification quantity and the normal target driving force, and for achieving the grade-adapted target driving force by regulating the output section, wherein the controller is configured to calculate the driving force modification quantity by multiplying the grade resistance by a predetermined factor which is greater than zero and smaller than one, and to calculate the grade-adapted target driving force by adding the driving force modification quantity to the normal driving force. - View Dependent Claims (14)
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13. A vehicle comprising:
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an output section comprising a prime mover for varying an actual driving force of the vehicle;
an input section for collecting input information on vehicle operating conditions of the vehicle, said input section comprising a vehicle speed sensor for sensing a vehicle speed of the vehicle, and an accelerator sensor for sensing a driver'"'"'s accelerator input quantity; and
a control section comprising a controller for determining, as a normal target driving force, a desired vehicle driving force on a level road in accordance with the accelerator input quantity and the vehicle speed, for determining a vehicle grade resistance in accordance with the input information, for calculating a driving force modification quantity in accordance with the vehicle grade resistance, for determining a grade-adapted target driving force which is equal to a sum of the driving force modification quantity and the normal target driving force, and for achieving the grade-adapted target driving force by regulating the output section wherein the controller is configured to calculate a grade-adapted reference driving force which is a sum of the normal driving force and a predetermined standard grade resistance multiplied by a predetermined factor which is greater than zero and smaller than one, to calculate an interpolation coefficient in accordance with the vehicle grade resistance and the standard grade resistance, and to calculate the grade-adapted target driving force by adding, to the normal driving force, the driving force modification quantity which is equal to a product of the interpolation coefficient and a difference resulting from subtraction of the normal driving force from the grade-adapted reference driving force.
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15. A vehicle driving force controlling apparatus comprising:
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means for ascertaining an accelerator input quantity and a vehicle speed;
means for determining, as a normal target driving force, a desired vehicle driving force on a level road in accordance with the accelerator input quantity and the vehicle speed;
means for determining a vehicle grade resistance means for calculating a driving force modification quantity in accordance with the grade resistance and for setting the driving force modification quantity at less than 100% of the grade resistance;
means for determining a grade-adapted target driving force which is a sum of the normal driving force and the driving force modification driving; and
means for achieving the grade-adapted target driving force.
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16. A process for controlling a vehicle driving force of a vehicle, said process comprising:
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determining a normal driving force representing a desired vehicle driving force on a level road, in accordance with an accelerator input quantity and a vehicle speed;
calculating a driving force modification quantity in accordance with a vehicle grade resistance, wherein the driving force modification quantity is set at less than 100% of the grade resistance; and
determining a grade-adapted target driving force which is a sum of the normal driving force and the driving force modification quantity, to control the vehicle driving force. - View Dependent Claims (17)
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Specification