Honda Motor Co., Ltd.

Naoyuki Mimatsu

Yasushi Kojima

Yutaka Asano

Seigo Murashige

Hideaki Iwashita

Kazuhiko Kitano

Toshihiro Sone

Provided is a control device for a vehicle. A control device for a vehicle includes a vehicle that includes an engine and a main motor, and a transmission equipped with first and second input shafts which are respectively connected to the engine via first and second clutches, an output shaft through which power is output to drive wheels, first and second transmission mechanisms which respectively includes a plurality of transmission gears selectively joined to the first and second input shaft respectively, and an ECU. When the main motor is driven and when the engine is stopped, the ECU determines that the vehicle travels using power of the engine using the transmission gears of one of transmission mechanisms in a case where defective engagement release occurs such that a transmission gear of the other transmission mechanism is not disengaged.

Control device for vehicle

A control device in a hybrid vehicle in which control is performed so that the hybrid vehicle can travel using only one shift mechanism from two shift mechanisms is provided. The control device in the hybrid vehicle includes: a transmission including: a first input shaft connected to a motor and optionally connected to an engine; a second input shaft optionally connected to the engine; an output shaft configured to output to power to drive wheels; a first shift mechanism including a plurality of shift gears optionally coupled to the first input shaft; and a second shift mechanism including a plurality of other shift gears optionally coupled to the second input shaft; and an electronic control unit (ECU), wherein the ECU starts the engine with the first input shaft using the motor if none of the shift gears in the first shift mechanism is engaged when the engine is not operating.

Control device in hybrid vehicle

The two ends of a battery circuit (), in which a first power supply () is connected in series to a second power supply (), are connected to the respective first and third lines (Land L), while a junction () between the first power supply () and the second power supply () is connected to a second line (L). The two ends of a switching circuit () are connected to the respective first and third lines (Land L). An end of a reactor () is connected to a junction between first and second switching elements (and), while the other end of the reactor () is connected to the second line (L). The power supply apparatus (), when activated, executes an operation in which, while the ON state of the first switching element () is inhibited, only the second switching element () is alternately turned ON and OFF with the ON state duration changed such that the ON state duration has a tendency to become longer. Thereafter, the power supply apparatus () executes an operation in which the switching elements (and) are alternately turned ON.

Power supply apparatus activating method

If a lower arm device connection period is non-zero in a previous switching cycle, a first dead time is prohibited from decreasing, and if the lower arm device connection period is zero, the first dead time is allowed to decrease, wherein the first dead time is the dead time provided after the lower arm device connection period in the previous switching cycle but before an upper arm device connection period in the current switching cycle.

Method of controlling DC/DC converter apparatus

A triangular-wave current flows through a reactor of a DC/DC converter for converting voltages between increased and reduced levels. Surges are reduced, which are developed in an output voltage serving as a control voltage when the triangular-wave current changes across a zero value at which the current direction is changed. When a primary current flowing through the reactor changes across 0 [A] (zero value) at which the direction is changed, within an adjustment range, a feedback coefficient by which to multiply the error between the control voltage and a target voltage is multiplied by k (k&#x3e;1) so as to increase a feedback amount. Surges developed in the control voltage due to a dead time when the primary current changes across 0 [A] are reduced.

Method of controlling DC/DC converter, fuel cell vehicle for carrying out such method

When a DC/DC converter switches between a primary voltage control mode, a secondary voltage control mode, and a current limiting mode as operation modes, an I-term resetting processor outputs an I term depending on the duty ratio in the operation mode before being switched to a PID processor. The PID processor performs a PID control process based on the input I term. A drive duty ratio setter outputs a drive duty ratio immediately after the control mode switching, which is substantially equal to the duty ratio in the operation mode before being switched. As a result, the duty ratios in the operation mode before being switched and the operation mode after being switched are made continuous with respect to each other.

Method of controlling DC/DC converter, method of controlling DC/DC converter apparatus, and method of controlling driving operation of electric vehicle

A controller is capable of executing direct couple control that directly couples a first power device and a second power device without causing a DC/DC converter to convert voltage. During the direct couple control, a drive signal that causes no voltage conversion is intermittently output to at least one of a plurality of switching devices.

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Utsunomiya, Japan

Naoyuki Mimatsu