METHOD AND DEVICE FOR VEHICLE DRIVING ASSISTANCE
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Abstract
A method and device for driving assistance for a propulsion unit of a vehicle with manual control of the transmission gear ratio, using a control system with a calculator controlling an indication to a driver of a recommended gear ratio based on a request information from the driver and depending on driving conditions of the vehicle at any moment, and a mapping of the gear change rules from which the ratio to be recommended is determined, depending on the vehicle speed at each moment, for an optimal fuel consumption and a minimized pollutant emission. The recommended ratio for an optimal consumption is corrected in successive steps by taking into account, one after the other, a set of constraints concerning the driving safety and comfort, each step having priority over the previous one so that the ratio finally recommended is an optimal balance between the different constraints while putting an emphasis on driving safety.
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Citations
20 Claims
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1-10. -10. (canceled)
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11. A device to assist with control of a propulsion unit of a vehicle including a drive engine, a clutch, and a manual, mechanical, or semi-automatic gearbox, the device comprising:
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means for indicating to the driver a recommended transmission ratio, controlled by a control system comprising a computer into which there is incorporated at least one map of gear-change laws for determining a recommended gear ratio as a function of information concerning the driver'"'"'s wishes, giving due consideration to a set of signals applied to inputs of the computer and that are representative of driving conditions of the vehicle at each instant, wherein the computer comprises an element that determines the recommended gear ratio for optimum fuel consumption, as a function of information concerning the wishes of the driver and with due consideration given to the speed of the vehicle and a plurality of separate calculation modules independent of one another and each assigned to a determined driving constraint, the modules being arranged in series so that if need be each can apply to the value of the recommended gear ratio a correction suited to the constraint considered and in an order that favors driving safety, each correction applied, as appropriate, by a module, taking priority over the correction applied by the preceding module. - View Dependent Claims (12, 13, 14, 15, 16)
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- 17. A method to assist with control of a propulsion unit of a vehicle including a drive engine, a clutch, a manual gearbox, and a control system with a computer controlling an indication to the driver of a gear ratio that is recommended as a function of information concerning wishes of the driver and with due consideration to a set of parameters relating to vehicle driving conditions at each instant and to a map of gear-change laws on the basis of which there is determined, as a function of speed of the vehicle at each instant, the gear ratio to be recommended for optimum fuel consumption and minimum pollutant emissions, wherein the recommended gear ratio is corrected in successive steps giving due consideration, one after the other, to a set of constraints relating to safety and drivability, each step taking priority over the preceding one, so that the gear ratio finally recommended is an optimum compromise between these various constraints, favoring driving safety.
Specification