Ford Global Technolgoies, LLC

Engbert Spijker

Mark Eifert

Armin Warm

Peter Schmitz

Manuel Bojahr

Daniel Kok

Bjoern Mohrmann

Urs Christen

Rainer Busch

Eckhard Karden

Thomas Rambow

Achim Seibertz

Don A Kees

Lutz Gaedt

Erik Surewaard

An on-board electrical system for motor vehicles has a battery, a generator and at least one normal consumer that is connected to the battery in a switchable manner. A DC voltage/DC voltage converter is connected on its primary side to the battery and on its secondary side to a high-load resistor. A switch connects the high-load consumer to a storage device in a first switching position, and to the primary side in a second switching position. A controller controls and operates the switch between the first and the second switching position. A device that detects the actual electrical power of the high-load consumer is associated with the high-load consumer, and is connected at the output end to the controller.

On-board vehicle electrical system having a converter and high-load consumer

Methods and systems are provided for an on-board electrical system for a motor vehicle that includes one or more power sources and an electrical subsystem with a switch that can be actuated to selectively bypass a DC/DC converter and a storage device, responsive to electrical parameters such as the power demand of high-power consumers. In one example, when high-power consumers have low and constant power requirements, the switch may be positioned to bridge the DC/DC converter and storage device. Further, the method includes selectively controlling the power source in order to meet peak power demands with the power source operating at the greatest efficiency for the given operating conditions.

On-board electrical system for motor vehicles comprising a converter and a high-load consumer

In a method for operating a motor vehicle driven by an internal combustion engine and having a rechargeable battery and a generator for charging the battery, a charging acceptance of the battery is determined and a first charging mode, in which the generator is driven by the internal combustion engine in order to charge the battery, or a second charging mode, in which the generator is driven by a propulsionless travel movement of the motor vehicle, in order to charge the battery, is selected as a function of the charging acceptance.

Method for operating a motor vehicle and the motor vehicle

Desulfation of a primary battery of an on-board power system of a motor vehicle takes place during operation of an internal combustion engine using electrical energy transmitted to the primary battery front the internal combustion engine. When the internal combustion engine is switched off, or otherwise not operational, desulfation of the primary battery continues using a secondary battery wherein electrical energy is transmitted to the primary battery from the secondary battery.

System and method for desulfation of a lead-acid battery

A locking mechanism () is provided to block the internal combustion engine () at prepositioned cranking angle after shutting down. Preferably, the crankshaft of the engine is positioned at a crankshaft angle that is favorable for cranking. Prepositioning of the crankshaft angle results in a lower first compression torque and therefore increases kinetic energy stored in the crankshaft lumped inertia. The required maximum torque of the cranking aid () can therefore be reduced.

Locking mechanism for the crankshaft of an internal combustion engine

The invention relates to a regulation system for voltage regulation in the electrical power supply system for a motor vehicle, which contains a supercapacitor. In a short-term standby mode (ST), the voltage (U) of the supercapacitor is regulated such that a voltage window (&#x394;U) is maintained, thus ensuring a minimum energy content in the supercapacitor (). During a long-term standby mode (LT), the supercapacitor () is charged to a voltage (U) only when an activation signal (t) occurs. The energy for charging is drawn from a second energy store, in particular a battery.

Method for supplying power in an electrical power supply system having a supercapacitor

The invention relates to a method for controlling an internal combustion engine, in which a normal state (A) is exited by switching off the engine (state B) if a standstill of the vehicle is detected (STOP_COND), and in which the engine is restarted when specific conditions (START_COND) apply. When a stop-and-go situation (SS_DISABLE) applies (state A&prime;), this stop/start function is suppressed. Here, for example, repeated activation of the brakes, the engagement of specific gears and/or the spatial location of the motor vehicle may indicate that the vehicle is in a stop-and-go situation in which only brief, uneconomic switching off of the engine is probable.

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Nuth, Netherlands

Engbert Spijker