Method for a more efficient use of a combustion engine in a vehicle
First Claim
1. A method for a more efficient use of a combustion engine in a vehicle during driving of the vehicle, the vehicle comprising an automatic step geared transmission for automatic gear ratio adaptation of a gear ratio between an engine rotational speed and a rotational speed of driving wheels of the vehicle, comprising:
- sensing current engine rotational speed and engine rotational speed increase,estimating necessary minimum upshift engine rotational speed for a coming gear upshift;
registering that the engine rotational speed has stopped increasing without reaching the minimum upshift engine rotational speed, and where the engine rotational speed stops increasing at a first engine rotational speed within a predetermined distance of a maximum engine rotational speed where engine efficiency at the first engine rotational speed is below a first predetermined efficiency, andautomatically controlling engine output torque in order to limit the engine rotational speed to a first predetermined engine rotational speed where engine efficiency at the first predetermined engine rotational speed is above a second predetermined efficiency that is above the engine efficiency at the first engine rotational speed.
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Accused Products
Abstract
A method for a more efficient use of a vehicle combustion engine during driving, the vehicle including an automatic step geared transmission. The method includes the steps of sensing current engine rotational speed and engine rotational speed increase, estimating necessary minimum upshift engine rotational speed for a coming gear upshift, registering that the engine rotational speed stops increasing without reaching the minimum upshift engine rotational speed, and where the engine rotational speed stops increasing relatively close to a maximum engine rotational speed where engine efficiency is relatively low and, automatically controlling engine output torque in order to limit the engine rotational speed to a first predetermined engine speed where engine efficiency is relatively high.
35 Citations
14 Claims
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1. A method for a more efficient use of a combustion engine in a vehicle during driving of the vehicle, the vehicle comprising an automatic step geared transmission for automatic gear ratio adaptation of a gear ratio between an engine rotational speed and a rotational speed of driving wheels of the vehicle, comprising:
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sensing current engine rotational speed and engine rotational speed increase, estimating necessary minimum upshift engine rotational speed for a coming gear upshift; registering that the engine rotational speed has stopped increasing without reaching the minimum upshift engine rotational speed, and where the engine rotational speed stops increasing at a first engine rotational speed within a predetermined distance of a maximum engine rotational speed where engine efficiency at the first engine rotational speed is below a first predetermined efficiency, and automatically controlling engine output torque in order to limit the engine rotational speed to a first predetermined engine rotational speed where engine efficiency at the first predetermined engine rotational speed is above a second predetermined efficiency that is above the engine efficiency at the first engine rotational speed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A vehicle comprising a computer programmed with program code for executing a method for a more efficient use of a combustion engine in the vehicle during driving of the vehicle, the vehicle comprising an automatic step geared transmission for automatic gear ratio adaptation of a gear ratio between an engine rotational speed and a rotational speed of driving wheels of the vehicle, the method comprising:
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sensing current engine rotational speed and engine rotational speed increase, estimating necessary minimum upshift engine rotational speed for a coming gear upshift; registering that engine rotational speed has stopped increasing without reaching the minimum upshift engine rotational speed, and where the engine rotational speed stops increasing at a first engine rotational speed within a predetermined distance of a maximum engine rotational speed where engine efficiency at the first engine rotational speed is below a first predetermined efficiency, and automatically controlling engine output torque in order to limit the engine rotational speed to a first predetermined engine rotational speed where engine efficiency at the first predetermined engine rotational speed is above a second predetermined efficiency that is above the engine efficiency at the first engine rotational speed.
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13. A vehicle comprising a computer comprising a non-transitory computer readable medium comprising program code for executing a method for a more efficient use of a combustion engine in the vehicle during driving of the vehicle, the vehicle comprising an automatic step geared transmission for automatic gear ratio adaptation of a gear ratio between an engine rotational speed and a rotational speed of driving:
- wheels of the vehicle, comprising;
sensing current engine rotational speed and engine rotational speed increase, estimating necessary minimum upshift engine rotational speed for a coming gear upshift; registering that the engine rotational speed has stopped increasing without reaching the minimum upshift engine rotational speed, and where the engine rotational speed stops increasing at a first engine rotational speed within a predetermined distance of a maximum engine rotational speed where engine efficiency at the first engine rotational speed is below a first predetermined efficiency, and automatically controlling engine output torque in order to limit the engine rotational speed to a first predetermined engine rotational speed where engine efficiency at the first predetermined engine rotational speed is above a second predetermined efficiency that is above the engine efficiency at the first engine rotational speed.
- wheels of the vehicle, comprising;
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14. A vehicle comprising a computer comprising a non-transitory computer program product directly loadable into an internal memory in the computer, which computer program product comprises a computer program for executing a method for a more efficient use of a combustion engine in the vehicle during driving of the vehicle, the vehicle comprising an automatic step geared transmission for automatic gear ratio adaptation of a gear ratio between an engine rotational speed and a rotational speed of driving wheels of the vehicle, comprising:
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sensing current engine rotational speed and engine rotational speed increase, estimating necessary minimum upshift engine rotational speed for a coming gear upshift; registering that the engine rotational speed has stopped increasing without reaching the minimum upshift engine rotational speed, and where the engine rotational speed stops increasing at a first engine rotational speed within a predetermined distance of a maximum engine rotational speed where engine efficiency at the first engine rotational speed is below a first predetermined efficiency, and automatically controlling engine output torque in order to limit the engine rotational speed to a first predetermined engine rotational speed where engine efficiency at the first predetermined engine rotational speed is above a second predetermined efficiency that is above the engine efficiency at the first engine rotational speed.
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Specification