An apparatus for starting engine of mild hybrid electric vehicle according to an exemplary embodiment of the present disclosure may include: an ignition switch including a plurality of contact points; A gradient detector configured for detecting a road gradient of a road on which the vehicle is located; a state of charge (SOC) detector configured for detecting an SOC of a high voltage battery; a mild hybrid starter & generator (MHSG) including a stator and a rotor disposed inside the stator, and starting the engine or generating electricity by an output of the engine; a starter which is able to start the engine independently from the MHSG; an MHSG wheel rotating integrally with the rotor; an MHSG position detector configured for detecting a position of the MHSG; and a controller configured for determining a top dead center (TDC) of a predetermined cylinder based on a signal of the MHSG position detector.

An apparatus for controlling a startup of an engine includes an engine, an engine controller configured to check whether the startup of the engine is prepared to generate information on whether the startup is prepared when an ignition is turned on, a hybrid controller configured to check whether communication with the engine controller is normal and to generate information on whether the hybrid controller is normal, the hybrid controller causing a vehicle to be driven only in an EV mode or generating a start control signal for the startup of the engine, according to whether the EV mode is engaged when a start signal is input from a driver, and a starter driver configured to start the engine in response to the start control signal.

A starting power generation apparatus according to an embodiment of the present invention includes: a starter generator including a field portion having a permanent magnet, and an armature unit including a first multi-phase winding and a second multi-phase winding which are arranged in parallel; a first power conversion unit including a first positive-side DC terminal connected to a battery and a plurality of first AC terminals connected to the first multi-phase winding, the first power conversion unit being configured to convert a power bidirectionally between DC and AC; a second power conversion unit including a plurality of second AC terminals connected to the second multi-phase winding, the second power conversion unit being configured to control a current to be input and output via the second AC terminals; and a control unit configured to detect a positional relationship between the field portion and the armature unit based on an output voltage of the second multi-phase winding, and control the first power conversion unit and the second power conversion unit in accordance with the positional relationship detected. The control unit is configured to detect the positional relationship when the starter generator is stopped, based on time widths of two or more predetermined voltages generated in two or more windings constituting the second multi-phase winding in a case that an output voltage of the battery is applied to the first multi-phase winding for a predetermined time in a state where current input and output via the second AC terminals is off.

A smart voltage dip simulator apparatus and method are configured to test a motor starter ride through circuit. The simulator apparatus includes a power supply, an output switch, a test switch, a test lamp, a time selector, and a programmable logic controller. The power supply provides an output voltage to the motor starter when an output switch is actuated. A test of the motor starter is executed and a duration of the test is controlled by a selected time setting. The controller includes code therein configured to apply a predetermined dip to reduce the applied input voltage to the power supply and to generate the output voltage applied to the motor starter for the selected duration of the test. A method is performed to operate the simulator.

A method for diagnosing a fault mode in a system includes recording a hierarchical precedence rule assigning a priority level to fault modes of the system, and recording, in a fault report matrix, fault reports indicative of a corresponding one or more of the fault modes. The method also includes using the hierarchical precedence rule to determine the assigned relative priority level for the fault reports in response to a predetermined condition, e.g., a requested engine starting event, and identifying a root cause subsystem as a subsystem having the highest assigned priority level. A control action executed via the controller identifies the root cause subsystem by recording a diagnostic code and/or transmitting a message. The system is also disclosed, as is a computer-readable medium programmed with instructions embodying the method.

Provided are: a starter generator including a field portion having a permanent magnet, and an armature unit including a first multi-phase winding and a second multi-phase winding which are arranged in parallel; a first power conversion unit including a first positive-side DC terminal connected to a battery and a plurality of first AC terminals connected to the first multi-phase winding, the first power conversion unit being configured to convert a power bidirectionally between DC and AC; a second power conversion unit including a plurality of second AC terminals connected to the second multi-phase winding, the second power conversion unit being configured to control a current to be input and output via the second AC terminals; and a control unit configured to detect a positional relationship between the field portion and the armature unit based on an output voltage of the second multi-phase winding, and control the first power conversion unit and the second power conversion unit in accordance with the detected positional relationship.

Disclosed is an electric starter with a manual turning function. A main shaft, a drive gear mechanism, a shift fork, an electromagnetic relay guide rod and a first return spring are arranged in a housing of the electric starter. A gear shifting mechanism comprises a force receiving component which extends out of the housing of the electric starter and serves as an external force applying point so as to promote the electromagnetic relay guide rod to move rightwards, a normally closed switch for cutting off a power supply of the electric starter when the force receiving component moves to an extreme position, a positioning component for locking the force receiving component when the force receiving component moves to the extreme position, and a first return component which enables the force receiving component to automatically returns to an original state when the force receiving component is unlocked. The main shaft is indirectly driven to rotate by the turning mechanism via a transmission mechanism or directly driven to rotate by the turning mechanism via a turning tool. An improvement is made to a structure of a traditional electric starter without affecting existing functions thereof, i.e., a function of manual turning is added. Therefore, a flywheel gear of a motor can be precisely positioned during maintenance so as to improve efficiency and eliminate potential safety hazards.

An engine starting system and technique include selecting a target engine speed profile from a plurality of engine speed profiles based on operator inputs and operating parameters of the vehicle. A feedback control strategy is used to substantially conform the engine speed with the target speed profile during starting until a target speed is reached in which fueling is initiated to start the engine.

An apparatus for controlling a startup of an engine includes an engine, an engine controller configured to check whether the startup of the engine is prepared to generate information on whether the startup is prepared when an ignition is turned on, a hybrid controller configured to check whether communication with the engine controller is normal and to generate information on whether the hybrid controller is normal, the hybrid controller causing a vehicle to be driven only in an EV mode or generating a start control signal for the startup of the engine, according to whether the EV mode is engaged when a start signal is input from a driver, and a starter driver configured to start the engine in response to the start control signal.

Systems and methods for starting an engine are described. In one example, engine cranking speed for an engine of a hybrid vehicle is adjusted in response to operating conditions. The engine cranking speed may be reduced when capability of a battery that supplies power to rotate the engine is less than an amount of power to rotate the engine at a higher speed.