This disclosure provides systems, methods and apparatus for a engine start system. In one aspect, the engine start system includes: a booster battery selectively connected in parallel with the primary batteries of the engine. The booster battery is disconnected when the battery voltage of the primary batteries is below a first target voltage. The booster battery is connected when the battery voltage of the primary batteries is at or above the second target voltage, or in response to an external input.

A power supply system for a vehicle including a driving battery, first and second device batteries, a DC-to-DC converter, a control system device, and a specific device includes first and second power lines, first and second switches, and a coupling line. The first power line transmits power from the first device battery to the control system device. The second power line transmits power from the second device battery to the specific device. The first switch is coupled between the DC-to-DC converter and the first power line. The first switch includes a diode disposed in a direction to flow a current to the first power line. The coupling line is configured to transmit power from a node between the DC-to-DC converter and the first switch to the second power line. The second switch selectively opens and closes an electric circuit of the coupling line.

A power supply device for a vehicle which is used in a vehicle, includes: a first switch unit that is provided between a power generator which is driven by an internal combustion engine of the vehicle and a secondary battery which is connected to the power generator and supplies electric power to a starting device for starting the internal combustion engine; a second switch unit that is provided between the power generator and a capacitor which accumulates electric power supplied by the power generator; and a control unit that controls the connection state of the first switch unit and the connection state of the second switch unit.

A hybrid electric vehicle capable of starting an engine in the event of failure of a DC-DC converter and a method of controlling the hybrid electric vehicle are provided. The hybrid electric vehicle includes a driving motor, an engine, and a first relay that starts a starter. A second relay is disposed between a first power line, connected the starter and a first battery, and second power line, connects a DC-DC converter that converts the power of a second battery and an electric load. A controller selectively adjusts the states of the first relay and the second relay. Upon determining starting of the engine and detecting failure of the DC-DC converter, the controller maintains the on state of the second relay and turns on the first relay to perform cranking of the engine.

A combination engine starter and electric power generator device for a work vehicle has an electric machine and a gear set mounted to the electric machine. The gear set is configured to receive rotational input from the electric machine and from the work vehicle engine. The gear set mechanically couples the electric machine and the engine in first and second power flow directions in which in the first power flow direction the gear set effects a first gear ratio and in the second power flow direction the gear set effects a second gear ratio.

A motor vehicle includes a hybrid drive having an internal combustion engine and an electric drive motor, and an air conditioning system having a compressor configured to compress a refrigerant, and an electric motor configured to operate the compressor and to start the internal combustion engine as electric starter when being coupled with the internal combustion engine. The electric motor has an inverter to operate the electric motor directly with high voltage of a high-voltage onboard electrical system of the motor vehicle so as to enable the electric motor to apply a mechanical torque for re-staring the internal combustion engine in case of need in the absence of any assistance from the electric drive motor. A clutch device mechanically couples the electric motor of the air conditioning system with the internal combustion engine in response to a control signal.

Device (DMT) arranged to provide an additional voltage, when the heat engine starts up, for the electrical power supply of the rotating electrical machine (AD). This additional voltage is added to a rated voltage of the on-board electrical system (RB) provided by a battery (BAT). The device comprises a second voltage source (Ucap) and electronic switches (K1, K2), each comprising at least one MOSFET transistor. At least one MOSFET transistor (K2) of the switches, mounted in series with the second voltage source, is controlled in linear mode at the end of the startup of the heat engine. Advantageously, the device comprises current control loops for controlling the transistors in linear mode.

An electricity supply system having double power-storage devices which is suitable for implementation in an electric or hybrid motor vehicle. The supply system is intended for being connected to a power network of the vehicle. The supply system is of the type that includes a first power-storage device, having a first specific energy, a first specific power and a first operating voltage (Ue), and a second power-storage device, having a second specific energy that is lower than the first specific energy, a second specific power that is higher than the first specific power and a second operating voltage (Up) that is higher than the first operating voltage (Ue). The first and second power-storage devices are electrically coupled by a bidirectional DC-DC converter controlled in accordance with the operating states of the vehicle. The DC-DC converter includes a floating capacitor connected in series between the first and second power-storage devices.

A system for starting an internal combustion engine includes a battery system, a charger to receive DC battery power from the battery system and convert the power to a DC charging current, a supercapacitor array having a plurality of supercapacitor cells connected to the charger to receive the DC charging current therefrom, and a motor starter to start the internal combustion engine responsive to a DC input from the supercapacitor array. The charger modifies a voltage of the supercapacitor cells in an on-demand fashion, with the charger programmed to provide DC charging current to the supercapacitor array to hold the supercapacitor cells at a first voltage, receive a bump-up command indicative of an upcoming engine start and, responsive to receiving the bump-up command, provide DC charging current to the supercapacitor array to increase a voltage of the supercapacitor cells temporarily to a second voltage higher than the first voltage.

The present invention provides a start control system of a vehicle, including: an electronic control unit (ECU), a starter, an air conditioner, and a starting power supply. The starting power supply includes a starting battery and a battery management system (BMS). At a low-temperature environment, when receiving an ignition request signal sent by the ECU, the BMS detects the temperature of the starting battery. When the temperature is less than a preset threshold, the starting battery is connected to the air conditioner for a preset time, so that the starting battery effectively raises the temperature of the starting battery by means of discharging at a high current temporarily. The start control system of a vehicle improves an ignition capability of a vehicle in a low-temperature environment, extends a temperature range and an area of using the vehicle, and improves competitiveness of the vehicle. The present invention further provides a vehicle having the start control system of a vehicle.