A vehicular apparatus receiving power from a battery mounted on a vehicle includes a main controller unit, a defect detection unit, and an operation controller unit. The operation controller unit is configured to turn off an operation of a target device among a plurality of devices controlled by the main controller unit in response to an occurrence of a voltage drop in which the voltage from the battery is equal to or lower than a predetermined threshold value. In response to turning off the operation of the target device due to the voltage drop, the operation controller unit is configured to transmit a notification indicating turning off of the operation of the target device to the defect detection unit. Upon receiving the notification, the defect detection unit is configured to cancel a determination of a defect relative to the target device.

A booster is mounted on a vehicle having an idle stop function. The booster boosts an input voltage supplied from a battery, and outputs the boosted input voltage to an in-vehicle device. The booster includes a booster circuit and an output voltage sensor. The booster circuit is a chopper-type, and includes a reactor having one end connected to the battery and a switching element connected between an other end of the reactor and a ground. The output voltage sensor detects an output voltage of the booster circuit.

An electric starter system is usable with an engine and a power inverter module (PIM), e.g., of a powertrain. The starter system includes a polyphase/AC brushless starter motor connected to the PIM via an AC voltage bus and selectively connected to the engine during a requested engine start event. A sensor on the DC voltage bus outputs a signal indicative of a voltage level of the DC voltage bus. The controller executes a method using voltage stabilization logic having a proportional-integral (PI) torque control loop. Logic execution in response to the requested engine starting event causes the controller to control the starter motor, when the bus voltage exceeds a calibrated minimum voltage, using a starting torque determined via the control loop. The commanded starting torque limits inrush current to the starter motor such that the DC voltage bus remains above the minimum voltage.

A vehicle power source includes a generator motor coupled to an engine, a first power storage, a second power storage, a conduction switch, and a switch controller. The first and the second power storages are coupled, in parallel, to the generator motor. The conduction switch is subject to change between a conductive state and a cut-off state of the generator motor and the second power storage. The switch controller changes the conduction switch from the conductive state to the cut-off state, on a condition that the generator motor is controlled in a powered state. The switch controller changes the conduction switch from the cut-off state to the conductive state, on a condition that the second power storage discharges in excess of a threshold, with the conductive switch changed to the cut-off state.

A system for a controller area network (CAN) transceiver of a motor vehicle including a main power supply, the main power supply being unregulated, a secondary power supply set above a minimum operating voltage of the CAN transceiver, the secondary power supply being regulated, a first diode, the first diode allowing the main power supply to power the CAN transceiver, a second diode, the second diode allowing the secondary power supply to power the CAN transceiver, wherein when the main power supply has a low cranking voltage below a normal operating voltage range, the first diode is reverse bias and the second diode is forward bias at the low cranking voltage, the secondary power supply powers the CAN transceivers at the low cranking voltage, thereby allowing the CAN transceiver to remain ON at the low cranking voltage.

A vehicle control apparatus is mounted on a vehicle, which includes an engine and a motor configured to start the engine. The vehicle control apparatus is provided with: a first controller programmed to perform a departure prevention control, which is to prevent the vehicle from departing from a driving lane, when the vehicle is about to depart from the driving lane; and a second controller programmed to perform an automatic stop control, which is to automatically stop the engine on condition that a predetermined stop condition is satisfied, and which is to operate the motor and to restart the engine on condition that a predetermined start condition is satisfied after the engine is automatically stopped. The first controller is programmed to prohibit a start of an automatic stop of the engine by the automatic stop control, when the vehicle is about to depart from the driving lane.

A control apparatus includes a first determination section determining whether a power-supply voltage has decreased below a first threshold value, an interruption section interrupting a current flow to an inverter if the voltage has decreased below the first threshold value, a second determination section that determining whether the power-supply voltage has increased above a second threshold value, an interruption releasing section releasing the interruption based on the fact that the voltage has increased above the second threshold value, a count section counting the number of interruptions, a limiting section determining whether the decrease in the power-supply voltage is caused by a first factor of an electric rotating machine or a second factor, and limits the counting if the decrease in the power-supply voltage is caused by the second factor, and a third determination section determining whether the interruption is allowed to be released based on the number of interruptions.

A system for a vehicle having an engine and a battery includes a memory and a controller. The memory has a first current expected to be provided by the battery for restarting the engine during a warm cranking event and a second current expected to be provided by the battery for restarting the engine during a cold cranking event. The controller to predict a first minimum voltage of the battery expected during the warm cranking event based on the first current and a second minimum voltage of the battery expected during the cold cranking event based on the second current.

In a system that shares a battery with an external device, the system includes a power storage device connected to the battery via a power supply line. The system includes a switch provided on the power supply line, and a control unit. The control unit controls on-off switching operations of the switch to selectively establish an electrical conduction between the battery and the power storage device or interrupt the electrical conduction therebetween. The battery has a battery voltage thereacross, and the power storage device has a power-storage voltage thereacross. The battery charges the power storage device while the electrical conduction is established so that the power-storage voltage follows the battery voltage. The control unit turns off the switch when the battery voltage is in a predetermined insufficient voltage state to prevent electrical power charged in the power storage device from being discharged to the battery.

An integrated starter and on-board electrical system disconnecting module for connecting to a starter battery and to an on-board electrical system by a transducer is disclosed. A method for limiting the starting current in a motor vehicle and the use of the integrated starter and on-board electrical system disconnecting module in multi-voltage on-board electrical systems, in particular during a start-stop operation of plug-in hybrid vehicles and for hybrid on-board electrical systems, are also disclosed. The transducer can be connected to a starter circuit including the starter battery from an on-board electrical system side, via a starter control device and via an on-board electrical system disconnector. The on-board electrical system can be uncoupled from the starter circuit and the starter control device and the on-board electrical system disconnector are integrated in the module.