Method and device for predicting the starting ability of a vehicle
First Claim
1. A device for predicting the starting ability of a vehicle having an internal combustion engine and a starter which is supplied with electrical power by a vehicle battery, comprising:
- a battery state detection device which determines a state of charge of the vehicle battery;
a first device which uses a discharge current curve to determine a charge drained from the vehicle battery during a predefined time period when the vehicle is shut off;
a second device which calculates the state of charge of the vehicle battery after the predefined time period;
a third device that determines an electrical battery variable in which a characteristics map of the electrical battery variable is stored as a function of the state of charge of the vehicle battery, a value of the electrical battery variable, which is present after the predefined time period, being read out from the characteristics map;
a measurement device configured to measure an electrical variable of the vehicle battery during a starting operation, wherein the measured electrical variable is used to correct the stored characteristics map; and
a prediction device which uses the read out value of the electrical battery variable to determine whether or not the vehicle is able to start after the predefined time period.
1 Assignment
0 Petitions
Accused Products
Abstract
A device for predicting the starting ability of a vehicle having an internal combustion engine and a starter which is supplied with electrical power by a vehicle battery. The starting ability of the vehicle can be determined particularly easily when a starting current characteristics map is stored in a device of the prediction system from which a starting current is determined under consideration of the state of charge of the battery after a predefined time period and the starting ability of the vehicle is determined from this via a prediction device.
-
Citations
12 Claims
-
1. A device for predicting the starting ability of a vehicle having an internal combustion engine and a starter which is supplied with electrical power by a vehicle battery, comprising:
-
a battery state detection device which determines a state of charge of the vehicle battery; a first device which uses a discharge current curve to determine a charge drained from the vehicle battery during a predefined time period when the vehicle is shut off; a second device which calculates the state of charge of the vehicle battery after the predefined time period; a third device that determines an electrical battery variable in which a characteristics map of the electrical battery variable is stored as a function of the state of charge of the vehicle battery, a value of the electrical battery variable, which is present after the predefined time period, being read out from the characteristics map; a measurement device configured to measure an electrical variable of the vehicle battery during a starting operation, wherein the measured electrical variable is used to correct the stored characteristics map; and a prediction device which uses the read out value of the electrical battery variable to determine whether or not the vehicle is able to start after the predefined time period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A method for predicting the starting ability of a vehicle having an internal combustion engine and a starter which is supplied with electrical power by a vehicle battery, the method comprising:
-
determining an instantaneous state of charge of the vehicle battery via a battery state detection device; determining a charge drained from the vehicle battery during a predefined time period when the vehicle is shut off; calculating the state of charge of the vehicle battery after the predefined time period; determining an electrical battery variable based on the calculated state of charge of the vehicle battery from a characteristics map stored in a device, wherein at least one measured electrical variable of the vehicle battery measured during a starting operation is used to correct the stored characteristics map; and determining whether or not the vehicle is able to start after the predefined time period via a prediction device which determines the starting ability on the basis of the battery variable determined from the characteristics map. - View Dependent Claims (11, 12)
-
Specification