# US 10,479,299 B2 · Method for controlling a consumer of a low-voltage on-board electrical system

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- Number: US 10,479,299 B2
- Document ID: US10479299B2
- Status: Granted
- Kind: B2
- Application number: 15/663,705
- Filed: 2017-07-29
- Published: 2017-11-16
- Granted: 2019-11-19
- Earliest claimed: 2015-02-11
- Assignees: Volkswagen Aktiengesellschaft
- Applicants: Volkswagen Aktiengesellschaft
- Inventors: Kai Bühring
- Web page: https://patentgrep.com/patent/US10479299B2

## CPC

- B60R 16/03: for supply of electrical power to vehicle subsystems {or for (circuit arrangements for charging batteries H02J7/00)}
- H02J 1/14: Balancing load and power generation in DC networks
- H02J 2105/33: exchanging power with road vehicles
- Y02T 10/92: Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles
- B60R: VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A method for controlling consumers of a low-voltage on-board electrical system of a motor vehicle reduces, when it is identified that a high-current consumer is connected, the current consumption of another consumer by an amount that corresponds to the current consumption of the high-current consumer. A control apparatus for controlling consumers of a low-voltage on-board electrical system of a motor vehicle is also provided.

## Claims

### Claim 1

A method for controlling a consumer of a low-voltage on-board electrical system of a motor vehicle, the method comprising:
providing a high-current consumer of the low-voltage on-board electrical system, and providing a further consumer of the low-voltage on-board electrical system; and
reducing a current consumption of the further consumer by an amount that corresponds to a current consumption of the high-current consumer, when it is identified that the high-current consumer is connected, wherein the further consumer, whose current value is reduced, is a PWM cooling fan, wherein the PWM cooling fan is driven in a differentiated manner by a pulse width modulation such that a current consumption is adjustable.

### Claim 2 (depends on 1)

The method according to claim 1, wherein the further consumer that has its current value reduced is a consumer whose effect reacts with inertia to a reduction of its current value.

### Claim 3 (depends on 1)

The method according to claim 1, wherein the high-current consumer is a gearbox pump.

### Claim 4

A control configuration for a motor vehicle, comprising:
a control apparatus configured to identify that a high-current consumer of a low-voltage on-board electrical system is connected; and
said control apparatus being configured to reduce a current consumption of a further consumer of the low-voltage on-board electrical system by an amount that corresponds to a current consumption of the high-current consumer, when said control apparatus identifies that the high-current consumer is connected and said control apparatus being configured to evaluate a control signal that indicates a critical load on the low-voltage on-board electrical system and to reduce the current consumption of the further consumer if the control signal indicates a critical load on the low-voltage on-board electrical system.

### Claim 5

A method for controlling a consumer of a low-voltage on-board electrical system of a motor vehicle, the method comprising:
providing a high-current consumer of the low-voltage on-board electrical system, and providing a further consumer of the low-voltage on-board electrical system, wherein the further consumer has an inductance such that an induction voltage is generated when a current value of the further consumer is reduced, wherein the induction voltage additionally feeds the low-voltage on-board electrical system; and
reducing a current consumption of the further consumer by an amount that corresponds to a current consumption of the high-current consumer, when it is identified that the high-current consumer is connected.

### Claim 6

A method for controlling a consumer of a low-voltage on-board electrical system of a motor vehicle, the method comprising:
providing a high-current consumer of the low-voltage on-board electrical system, and providing a further consumer of the low-voltage on-board electrical system;
evaluating a control signal that provides information about a connection of the high-current consumer; and
reducing a current consumption of the further consumer by an amount that corresponds to a current consumption of the high-current consumer, when it is identified that the high-current consumer is connected.

### Claim 7 (depends on 6)

The method according to claim 6, which comprises reducing the current consumption of the further consumer by a maximum amount, after identifying the control signal that provides information about the connection of the high-current consumer.