ELECTRICAL SYSTEM FOR A MOTOR VEHICLE AND METHOD FOR CONTROL OF A STARTER MOTOR AND A BATTERY ISOLATOR IN SUCH AN ELECTRICAL SYSTEM
First Claim
1. An electrical system for a motor vehicle, the electrical system comprising:
- a consumer battery set comprising one or more consumer batteries for supplying electric current to various electrical consumers of the motor vehicle,a starting battery set comprising one or more starting batteries and connected in parallel with the consumer battery set,a starter motor for starting the engine,a battery isolator in an electrical circuit with the starting battery set, the isolator being switchable between an off position thereof in which the battery isolator is configured to keep the starting battery set electrically disconnected from the starter motor, and an on position thereof in which the battery isolator is adapted configured to keep the starting battery set electrically connected to the starter motor for supply of electrical current to the starter motor from the starting battery set, anda starter operable for generating a starting signal for starting the starter motor,an electronic control device configured and operable such that upon receiving a starting signal from the starter, the control device causes the battery isolator to assume the on position, and to thereafter causing cause the starter motor to start so that the battery isolator is in the on position before the starter motor is started, andthe control device is configured and operable for switching off the starter motor and to thereafter allow the battery isolator to be switched from on position to off position so that the starter motor is switched off before the battery isolator is caused to assume the off position.
1 Assignment
0 Petitions
Accused Products
Abstract
An electric system for a motor vehicle and method for control of a starter motor (10) and a battery isolator (11) in such an electrical system. A consumer battery set and a starting battery set (6) are connected in parallel. The battery isolator is switchable between an off position in which the starting battery set is electrically disconnected from the starter motor, and an on position in which the starting battery set is electrically connected to the starter motor. An electronic control device (12), upon receiving a starting signal, causes the battery isolator to assume the on position, and thereafter causes the starter motor to start, in order thereby to ensure that the battery isolator is in the on position before the starter motor is started. For switching off the starter motor, the battery isolator is only allowed to be switched from on position to off position after the starter motor has been switched off, in order thereby to ensure that the starter motor is switched off before the battery isolator is caused to adopt the off position.
24 Citations
14 Claims
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1. An electrical system for a motor vehicle, the electrical system comprising:
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a consumer battery set comprising one or more consumer batteries for supplying electric current to various electrical consumers of the motor vehicle, a starting battery set comprising one or more starting batteries and connected in parallel with the consumer battery set, a starter motor for starting the engine, a battery isolator in an electrical circuit with the starting battery set, the isolator being switchable between an off position thereof in which the battery isolator is configured to keep the starting battery set electrically disconnected from the starter motor, and an on position thereof in which the battery isolator is adapted configured to keep the starting battery set electrically connected to the starter motor for supply of electrical current to the starter motor from the starting battery set, and a starter operable for generating a starting signal for starting the starter motor, an electronic control device configured and operable such that upon receiving a starting signal from the starter, the control device causes the battery isolator to assume the on position, and to thereafter causing cause the starter motor to start so that the battery isolator is in the on position before the starter motor is started, and the control device is configured and operable for switching off the starter motor and to thereafter allow the battery isolator to be switched from on position to off position so that the starter motor is switched off before the battery isolator is caused to assume the off position. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for control of a starter motor and a battery isolator in an electrical system of a motor vehicle, wherein the electrical system comprises a consumer battery set comprising one or more consumer batteries for supplying electric current to various electrical consumers of the motor vehicle, and a starting battery set comprising one or more starting batteries and connected in parallel with the consumer battery set, the battery isolator being switchable between an off position in which the battery isolator is configured and operable to keep the starting battery set electrically disconnected from the starter motor, and an on position in which the battery isolator is configured and operable to keep the starting battery set electrically connected to the starter motor for supply of electrical current to the starter motor from the starting battery set;
- the method comprising;
upon an electronic control device of the motor vehicle, upon receiving a starting signal from a starter, the control device causing the battery isolator to assume the on position, and thereafter causing the starter motor to start so that the battery isolator is in the on position before the starter motor is started, and the control device causing the starter motor to be switched off, and thereafter allowing the battery isolator to be switched from on position to off position so that the starter motor is switched off before the battery isolator is caused to assume the off position. - View Dependent Claims (8, 9, 10, 11)
- the method comprising;
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12. A computer program product comprising computer program codes that when executed by a computer and, in a motor vehicle with an electrical system which electrical system comprises:
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a consumer battery set comprising one or more consumer batteries for supply of electric current to various electrical consumers of the motor vehicle, a starting battery set comprising one or more starting batteries and connected in parallel with the consumer battery set, a starter motor for starting the engine, a battery isolator switchable between an off position thereof in which the battery isolator keeps the starting battery set electrically disconnected from the starter motor, and an on position thereof in which the battery isolator keeps the starting battery set electrically connected to the starter motor for supply of electrical current to the starter motor from the starting battery set, and a starter operable for generating a starting signal for starting the starter motor, causes the computer to cause an electronic control device of the motor vehicle; upon receiving a starting signal from the starter, to cause the battery isolator to assume the on position, and thereafter the starter motor to start before the starter motor is started, and for switching off of the starter motor, to cause the starter motor to be switched off, and thereafter to allow the battery isolator to be switched from on position to off position such that the starter motor is switched off before the battery isolator is caused to assume the off position. - View Dependent Claims (13, 14)
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Specification