Provided is a start-stop control apparatus to be mounted in a vehicle including an engine, a starter motor configured to restart the engine, and an auxiliary battery configured to supply electric power to the starter motor. The start-stop control apparatus includes a stop processing unit and an engine measuring unit. The stop processing unit stops idling of the engine while the vehicle is being stopped. The engine measuring unit measures an internal loss of the engine. The stop processing unit determines whether to stop the idling of the engine on the basis of the internal loss measured by the engine measuring unit and the state of charge of the auxiliary battery.

In performing double drive startup for starting up an engine while cranking the engine by both a first motor and a second motor, the cranking of the engine by one of the first motor and the second motor is finished earlier than the cranking of the engine by the other of the first motor and the second motor.

An electric turning machine (ETM) operatively connected to an internal combustion engine (ICE) is operated as a motor with a first control strategy and as a generator with a second control strategy. In the first control strategy, electric power is delivered from a power source to the ETM selectively through at least one transistor of an electrical converter. After switching from the first control strategy to the second control strategy, the ETM delivers electric power to an accessory selectively through the at least one transistor of the electrical converter.

A system for discharging or charging a capacitor of a hybrid vehicle according to the present disclosure includes a target state of charge (SOC) module and a capacitor charge/discharge module. The target SOC module determines a target state of charge of the capacitor based on a speed of the vehicle. The capacitor charge/discharge module determines whether a state of charge of a capacitor is greater than a target state of charge. The capacitor charge/discharge module dissipates power from the capacitor to at least one of a battery of the vehicle and an electrical load of the vehicle when the state of charge of the capacitor is greater than the target state of charge.

In performing double drive startup for starting up an engine while cranking the engine by both a first motor and a second motor, the cranking of the engine by one of the first motor and the second motor is finished earlier than the cranking of the engine by the other of the first motor and the second motor.

An engine electronic control unit (ECU) for a vehicle includes a non-volatile memory and a microcontroller. The non-volatile memory is configured to store an indicator of ignition status having an initial off-status. The microcontroller is coupled to the non-volatile memory and is configured to receive a SOC of a battery for the engine ECU. The microcontroller is further configured to determine the SOC is insufficient to power-up the engine ECU following a reset condition. The microcontroller is further configured to disable over-writing the indicator of ignition status in response to determining the SOC is insufficient.

A method for operating a vehicle that may be automatically stopped and started is described. In one example, the method includes starting an engine via expansion stroke combustion in response to a request to urgently start the engine. In addition, the method includes adjusting a position of a compression relief valve in response to a predicted urgency of an engine start.

A vehicle determines a first resistance of a starter motor and a starter cable connected thereto based at least in part on the first voltage of a power source. The vehicle determines a predicted minimum battery voltage based at least in part on the first resistance of the starter motor and the starter cable. The vehicle, in response to the predicted minimum battery voltage satisfying a threshold, enables a vehicle stop-start function, and, in response to the predicted minimum battery voltage failing to satisfy the threshold, disables the vehicle stop-start function.

An electric turning machine (ETM) operatively connected to an internal combustion engine (ICE) is operated as a motor with a first control strategy and as a generator with a second control strategy. In the first control strategy, electric power is delivered from a power source to the ETM selectively through at least one transistor of an electrical converter. After switching from the first control strategy to the second control strategy, the ETM delivers electric power to an accessory selectively through the at least one transistor of the electrical converter.

A system for discharging or charging a capacitor of a hybrid vehicle according to the present disclosure includes a target state of charge (SOC) module and a capacitor charge/discharge module. The target SOC module determines a target state of charge of the capacitor based on a speed of the vehicle. The capacitor charge/discharge module determines whether a state of charge of a capacitor is greater than a target state of charge. The capacitor charge/discharge module dissipates power from the capacitor to at least one of a battery of the vehicle and an electrical load of the vehicle when the state of charge of the capacitor is greater than the target state of charge.