The present invention provides an emergency starting device, including a first output end and a second output end, wherein the first output end is used for being connected to a positive electrode of an accumulator battery in an engine starting system and the second output end is used for being connected to a negative electrode of the accumulator battery; the device includes a super-capacitor, a controller and a DC-DC booster circuit, wherein the controller receives first electrical signal from the accumulator battery and electrically connects the super-capacitor and the accumulator battery to start the engine with energy stored in the super-capacitor when the first electrical signal changes suddenly, the DC-DC booster circuit increases the output voltage of the accumulator battery to charge the super-capacitor. The invention further provides an emergency starting method accordingly. By using the super-capacitor, the controller and the DC-DC booster circuit the invention fits in various severe environments and can start an engine in emergency permanently and effectively.

Described herein is a device and method for current flow control for dual battery vehicle architecture. The dual battery vehicle architecture includes a second energy source that is used to support electrical loads, such as radio and navigation systems, during re-cranking in stop-start situations. A quasi-diode device is configured to effectively split a main battery and starter circuit from the rest of the vehicle electrical system including the second energy source. The quasi-diode device includes a plurality of field effect transistors (FET) that conducts current in both directions between the main battery and starter circuit and the rest of the vehicle electrical system when the FETs are turned on and conducts current only from the main battery and starter circuit to the rest of the vehicle electrical system when the FETs are turned off, i.e. when re-cranking is occurring during a start-stop situation.

An internal combustion engine starting device includes: a starting requirement determination device that determines whether an internal combustion engine is required to be started when the engine stops combustion by stopping fuel supply to the engine, and the vehicle is in a freewheel running; and a driving control device that drives and rotates a motor in a starter by increasing a driving voltage to the motor from a voltage changing device for changing the driving voltage supplied to the starter in a case where a travelling speed is high to be higher than in a case where the traveling speed is low, when the internal combustion engine is required to be started.

A starting circuit for a generator-starter with three terminals comprises a positive power terminal, a negative power terminal, a positive starting terminal, an armature winding, a commutating winding, a series winding, the series winding, the armature winding and the commutating winding connected in series and a shunt winding. The generator-starter further comprises a voltage regulator having a first terminal and a second terminal, the first terminal connected to a positive terminal of the shunt winding and the second terminal connected to a positive power terminal, so that the shunt winding and the series winding are linked in parallel for a duration of a starting phase. A method for starting such a generator-starter is also provided.

A starter control apparatus outputs a conduction command to a starter relay when an engine start request is generated and starts driving of a starter. After the engine is started, when a condition for executing the failure diagnosis processing is satisfied, the starter control apparatus outputs a non-conduction command to a starter cutoff relay and diagnoses the starter cutoff relay for failure. The starter control apparatus determines that the starter cutoff relay is normal when a voltage applied to the starter after notification of the non-conduction command to the starter cutoff relay does not exceed a predetermined voltage. The starter control apparatus determines that the starter cutoff relay is abnormal when the voltage applied to the starter exceeds the predetermined voltage.