Honda Motor Co., Ltd.

Takuya Honjo

Daisuke Takeuchi

Masami Ogura

Takumi Sato

Masashi Bando

Daisuke Komazawa

Takahiro Kozeki

Tomoyo Honjo

Chisato Motoyama

Yuki Kosugiyama

A vehicle including: a first drive unit for driving wheels; a temperature control circuit for the first drive unit; and a control device, in which, when controlling the first drive unit under a first drive mode and executing a temperature increase control, the control device determines, based on a state of the vehicle, whether the drive mode of the first drive unit is changeable to a second drive mode in which an output from a first drive motor of the first drive unit is reduced, on determining that the drive mode is changeable to the second drive mode, the control device changes the drive mode to the second drive mode and continues the temperature increase control, otherwise the control device maintains the drive mode in the first drive mode, and ends the temperature increase control and then executes the normal temperature control.

Vehicle that maintains a temperature of a drive unit

A vehicle including: a battery; a voltage control unit that boosts an output voltage of the battery; a main drive unit, including an engine and a main drive motor driven by electric power with a boosted voltage, that outputs a main driving force for driving one of a front wheel and a rear wheel by at least one of the engine and the main drive motor; a sub drive unit, including a sub drive motor driven by the electric power with the boosted voltage, that outputs a sub driving force for driving another of the front wheel and the rear wheel; and a control unit, in which, when a temperature of the sub drive unit makes equal to or higher than a predetermined value while the main drive unit outputs the main driving force including a driving force of the engine, the control unit increases the boosted voltage.

Vehicle

A control device for a vehicle, the vehicle including: a battery; a first rotary electric machine coupled to an axle; a second rotary electric machine coupled to an internal combustion engine; a first power conversion circuit; a second power conversion circuit; a capacitor connected between the battery and connection portions connecting the first power conversion circuit and the second power conversion circuit in parallel; and a switching unit connected between the battery and the capacitor, the control device executing discharge control when a collision of the vehicle is predicted, and the discharge control includes: opening the switching unit to interrupt the power supply from the battery; stopping rotation of the first rotary electric machine if the first rotary electric machine is rotating; and discharging the electric charge stored in the capacitor.

Control device for vehicle

A vehicle temperature control system includes: a first temperature control circuit; a second temperature control circuit; a heat exchanger in which heat exchange between a first temperature control medium and a second temperature control medium is performed; and a control device. The control device is capable of controlling a flow rate control valve based on a temperature of the first temperature control medium and a temperature of the second temperature control medium. In a case where the temperature of the first temperature control medium is lower than the temperature of the second temperature control medium, the control device controls the flow rate control valve such that a flow rate to a second branch flow path is larger than a flow rate in a case where the temperature of the first temperature control medium is higher than the temperature of the second temperature control medium.

Vehicle temperature control system

A vehicle temperature control system includes: a first temperature control circuit; a second temperature control circuit; a heat exchanger in which heat exchange between a first temperature control medium and a second temperature control medium is performed; and a control device. The control device is capable of controlling a carrier frequency and a flow rate control valve of the second temperature control circuit based on the temperature of the first temperature control medium detected. In a case where the temperature of the first temperature control medium is lower than a predetermined value, the control device is configured to set the carrier frequency to be lower and controls the flow rate control valve such that the flow rate to a second branch flow path is smaller, as compared with a case where the temperature of the first temperature control medium is equal to or higher than the predetermined value.

A vehicle temperature adjustment system includes a first temperature adjustment circuit, a second temperature adjustment circuit, a heat exchanger configured to perform heat exchange between the first temperature adjustment medium and the second temperature adjustment medium, a first temperature sensor configured to detect a temperature of the first temperature adjustment medium flowing into the heat exchanger, a second temperature sensor configured to detect a temperature of the first temperature adjustment medium flowing out of the heat exchanger, a third temperature sensor configured to detect a temperature of the second temperature adjustment medium flowing into the heat exchanger, and a detection unit configured to detect an abnormality in the heat exchanger based on each detection value of the first temperature sensor, the second temperature sensor, and the third temperature sensor.

Vehicle temperature adjustment system

A vehicle includes a battery, an air conditioner, a first temperature adjustment circuit including a first pump and a chiller, a second temperature adjustment circuit including a second pump and a radiator, a coupling passage configured to connect the first temperature adjustment circuit and the second temperature adjustment circuit to form a coupling circuit, an electromagnetic switching valve configured to switch between a circulation state in which the heat medium can circulate through the coupling circuit and a non-circulation state in which the heat medium cannot circulate through the coupling circuit, a first temperature sensor configured to acquire a temperature of the battery, and a control device configured to select a mode based on at least the temperature of the battery. The control device performs a control based on a basic control map after selecting a series mode of a special control map.

A vehicle drive device includes: a first electric machine; an electric machine housing accommodating the first electric machine; a live part that is provided inside the electric machine housing and is electrically connected to the first electric machine; and a temperature-control circuit for temperature control for the first electric machine. The temperature-control circuit includes: a first temperature-control circuit through which a non-conductive first temperature-control medium circulates; a second temperature-control circuit through which a conductive second temperature-control medium circulates; and a heat exchanger configured to exchange heat between the first temperature-control medium and the second temperature-control medium. A protection cover including a first protection wall is provided inside the electric machine housing.

Vehicle drive device

A cooler includes a heat radiating member and a cover member that form a coolant flow path. The heat radiating member has a first surface on which an object to be cooled is disposed. The heat radiating member includes multiple fin members protruding into the coolant flow path from a second surface of the heat radiating member. The second surface of the heat radiating member is a part of a surface of the coolant flow path. The cover member includes a trap part in which multiple recesses are formed in a portion of an inner surface of the cover member being another part of the surface of the coolant flow path outside a protruding direction of the fin members.

Heat radiating cooler with recessed traps for coolant

A second temperature adjustment medium branches and flows into the first branch flow path and the second branch flow path at the branching portion, the second temperature adjustment medium and the second temperature adjustment medium are merged at the merging portion and flow through the pressure feed flow path to be supplied to the first pump, and the second temperature adjustment medium circulates through the second temperature adjustment circuit. A valve device configured to adjust a flow rate of the second temperature adjustment medium flowing through the second branch flow path is provided in the second branch flow path between the branching portion and the heat exchanger. The control device is configured to control the valve device to block the second temperature adjustment medium from flowing through the second branch flow path when a failure of the heat exchanger is detected.

A vehicle includes: an electric motor; and a temperature-control circuit through which a non-conductive temperature-control medium for temperature control for the electric motor circulates. The temperature-control circuit includes: a heat exchanger configured to exchange heat between the non-conductive temperature-control medium and a conductive temperature-control medium; and a pump driven in accordance with driving of the vehicle to circulate the non-conductive temperature-control medium. The temperature-control circuit further includes a liquid pressure holding unit configured to hold liquid pressure of the non-conductive temperature-control medium in the heat exchanger equal to or higher than a predetermined pressure.

A vehicle includes a temperature adjustment circuit includes a first temperature adjustment circuit; a second temperature adjustment circuit; a first pump configured to circulate a heat medium; a coupling path that couples the first temperature adjustment circuit and the second temperature adjustment circuit; a first switching unit capable of switching between a circulation state in which the heat medium circulates in the coupled circuit and a non-circulation state; a first branch path configured to bypass a part of the coupled circuit; and a first connection portion and a second connection portion connecting the first branch path and the coupled circuit. The second connection portion is located upstream of the first connection portion in a flow direction of the heat medium that flows through the first branch path, and the first pump is disposed between an outlet of the heat medium of the battery and the second connection portion.

Temperature adjustment circuit and control method thereof

A temperature adjustment circuit includes a first pump that circulates a heat medium in at least one of a first temperature adjustment circuit and a second temperature adjustment circuit; a coupling path that couples the first temperature adjustment circuit and the second temperature adjustment circuit to form a coupled circuit; a switching unit capable of switching between a circulation state in which the heat medium circulates in the coupled circuit and a non-circulation state in which the heat medium does not circulate in the coupled circuit; and a control device that controls the switching unit and the first pump. The control device switches the coupled circuit from the non-circulation state to the circulation state in a state in which a rotation speed of the first pump is decreased lower than a rotation speed of the first pump before switching, and increases the rotation speed of the first pump after switching.

A vehicle comprising a battery, a power converter, a charger, a first and a second temperature adjustment circuit including a first and a second pumps for supplying a heat medium, a coupling passage which forms a coupling circuit by coupling the first and the second temperature adjustment circuits, a switching unit capable of switching a state between a circulation state and a non-circulation state, and a control device to select one mode from a plurality of modes. The plurality of modes includes a series mode in which the heat medium is circulated in the coupling circuit in the circulation state and a separate mode in which the heat medium is circulated in at least the second temperature adjustment circuit in the non-circulation state. The control device executes the series mode when charging the battery.

Growing community of inventors

Saitama, Japan

Takuya Honjo