Denso Corporation

Toyota Jidosha Kabushiki Kaisha

Daisuke Kuroda

Kazuyoshi Obayashi

Keisuke Tani

Yukihiro Yamashita

Katsunori Tanaka

Keiji Kaita

Teruo Ishishita

Yuji Nishi

Takashi Senda

Masaki Uchiyama

Shinobu Okayama

Naoyuki Kamiya

Atsushi Fukaya

Shimpei Takita

Shunsuke Tomoto

Takeshi Shimoyama

Shingo Kawahara

Keiya Tani

The present disclosure includes an inverter connected to a power supply unit via a positive electrode side electrical path and a negative electrode side electrical path and including switching elements, a rotary electric machine including windings connected to each other at a neutral point and inputting and outputting power from and to the power supply unit via the inverter, a connection path electrically connecting an intermediate point between the storage batteries of the power supply unit to the neutral point of the windings, and a device including a first terminal and a second terminal enabling energization between the power supply unit and the device. The first terminal is connected to the connection path, and the second terminal is connected to at least one of the positive electrode side electrical path and the negative electrode side electrical path.

Power supply system including an electrical machine with its neutral point connected to a power supply unit

A power supply apparatus includes a storage battery and supplies a voltage from the battery to an electric load. The power supply apparatus includes first and second energizing paths connected in parallel between the battery and the load, a first switch making the first energizing path conductive and interrupting the first energizing path, and a second switch making the second energizing path conductive and interrupting the second energizing path. The power supply apparatus includes a first drive circuit that operates when a voltage is supplied and drives the first switch, a second drive circuit that operates when a voltage is supplied and drives the second switch into a conductive state in a case where the first switch is driven into a conductive state by the first drive circuit, first and second supply paths respectively supplying a voltage to the first and second drive circuits.

Power supply apparatus

During use of a secondary battery, a concentration change ratio estimating unit estimates a ratio of change in electrolytic solution concentration based on a charging/discharging current. According to the estimated ratio of change, a concentration estimated value calculating unit sequentially calculates an electrolytic solution concentration estimated value during the use of the secondary battery. Based on the estimated electrolytic solution concentration estimated value, a determining unit determines whether or not the electrolytic solution concentration is within a normal range. When the electrolytic solution concentration is outside the normal range, a charging/discharging condition modifying unit modifies a charging/discharging condition of the secondary battery to bring the electrolytic solution concentration back to the normal range, thus avoiding a tendency of overcharge or a tendency of overdischarge.

Control system for secondary battery, electrically powered vehicle having same, and method for controlling secondary battery

A control system for a vehicle has an engine control unit for an engine and a generator control unit for a power generator driven by the engine. The engine control unit calculates a permissive power generation torque, which is permitted to be used by the power generator, in accordance with a response delay of the engine. The generator control unit calculates a command power to be generated by the power generator so that a battery voltage variation and an engine speed variation are suppressed to be less than respective allowable variation limits, when a power difference is caused between a required power and a permissive power generated by the permissive torque.

Vehicle control system

A power supply control apparatus for controlling an electric generator of a vehicle limits the rate of change of a power supply voltage to a predetermined variation rate range, when the change is caused by operations to control the charge condition of the vehicle battery, and controls the generated power to match the drive torque applied by the engine to the generator. When the electrical load demand changes, the generated power is controlled to limit a resultant momentary change in the power supply voltage caused by an engine response delay, while minimizing a resultant momentary amount of engine speed variation.

Electrical power supply system for motor vehicle

A base engine torque generated with an estimated intake air amount is estimated. An engine torque is corrected by correcting an ignition timing based on a difference between a required engine torque and the base engine torque. A torque correction amount is calculated based on a correction amount of the ignition timing. An actual engine torque is estimated based on the calculated torque correction amount and the base engine torque. A permitted component driving torque is a difference between the actual engine torque and the required vehicle driving torque. A component is controlled based on the permitted component driving torque.

Controller and controlling method for internal combustion engine

An engine controller controls an engine, which drives a generator, an auxiliary device, and a vehicle. The generator generates electricity, and supplying the electricity to a battery and a plurality of current consumers. A generator controller controls the generator. An auxiliary device controller controls the auxiliary device. An electric power generation calculation unit calculates one of a requested power generation of the generator and a present power generation of the generator. An engine speed changing unit evaluates tendency of power generation on the basis of the one of the requested power generation and the present power generation. The engine speed changing unit requests increase or decreases in the engine speed when the engine speed changing unit determines the power generation to be inclined toward shortage or excess.

Engine controller and control method

An electric generator control apparatus of a vehicle sets respective target values of output voltage and output current for the electric generator of the vehicle, and selectively establishes a voltage control mode for holding the generator output voltage at the target voltage or a current control mode for holding the generator output current at the target current, with the mode selection and the setting of target values being performed based on criteria such as the level of charge of the vehicle battery, the electrical load of the vehicle equipment, etc.

Control apparatus for selectively controlling output current and output voltage of electric generator

A required-generate-current (RGC) is calculated according to conditions of the electric loads and a charging state of the battery. The required-alternator-drive-torque (RADT) is estimated according to the required-generate-current (RGC). A required engine torque is calculated by adding the required-alternator-drive-torque (RADT) and the required-vehicle-drive-torque (RVDT) together. The engine torque which is realized at next calculating timing is estimated in consideration of a response delay of the engine. The differential torque between the estimated engine torque and the required-vehicle-drive-torque (RVDT) is calculated as the permission torque. The command current corresponding to the permission torque is calculated. The control current of the alternator is controlled in such a manner as to generate current corresponding to the command current at the next calculating timing.

Growing community of inventors

Kariya, Japan

Daisuke Kuroda