US 8,757,306 B2Granted

Drive system for vehicle and vehicle driving method

AssigneeHonda Motor Co., Ltd.

InventorsTsunehiro Kobayashi, Mitsuhiro Iwadare, Satoshi Kodo, Takuya Yamada, Fumiyasu Suga

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Abstract

There is provided a drive system for a vehicle. The system includes: an internal combustion engine (ENG); a transmission mechanism (TM) a one-way clutch (OWC); a rotated driving member (11); an electric motor (MG1) that rotates the output shaft of the internal combustion engine; an electric motor generator (MG2) that transmits the rotational power to the rotated driving member and performs regenerative operation by receiving the rotational power output from the rotated driving member; and a controller (50) configured to cut off a fuel supply to the internal combustion engine and control the electric motor to rotate the output shaft of the internal combustion engine while the electric motor generator performs the regenerative operation.

Claims10

Dependent claims

A drive system for a vehicle, the system comprising:

an internal combustion engine that generates a rotational power with a fuel supply;
a transmission mechanism that changes a speed of the rotational power;
a one-way clutch comprising:
an input member;
an output member;
and
a locking member configured to allow the input member and the output member to be locked or unlocked with each other, the locking member being configured to transmit the rotational power provided to the input member to the output member when the input member and the output member are locked with each other,
wherein the input member and the output member are locked with each other when a forward rotating speed of the input member, which receives the rotational power output from the transmission mechanism, exceeds a forward rotating speed of the output member;
a rotated driving member that is connected to the output member of the one-way clutch and transmits the rotational power transmitted to the output member to a drive wheel;
an electric motor that is connected to an output shaft of the internal combustion engine so as to rotate the output shaft of the internal combustion engine;
an electric motor generator that is connected to the rotated driving member and configured to transmit the rotational power to the rotated driving member and configured to perform regenerative operation by receiving the rotational power output from the rotated driving member;
and
a controller configured to cut off a fuel supply to the internal combustion engine and control the electric motor to rotate the output shaft of the internal combustion engine while the electric motor generator performs the regenerative operation,
wherein the controller idles the internal combustion engine for an initial period of time, and then cuts off the fuel supply to the internal combustion engine and controls the electric motor to rotate the output shaft of the internal combustion engine while the electric motor generator performs the regenerative operation.

11 more elements

A drive system for a vehicle, the system comprising:

an internal combustion engine that generates a rotational power with a fuel supply;
a transmission mechanism that changes a speed of the rotational power;
a one-way clutch comprising:
an input member;
an output member;
and
a locking member configured to allow the input member and the output member to be locked or unlocked with each other, the locking member being configured to transmit the rotational power provided to the input member to the output member when the input member and the output member are locked with each other,
wherein the input member and the output member are locked with each other when a forward rotating speed of the input member, which receives the rotational power output from the transmission mechanism, exceeds a forward rotating speed of the output member;
a rotated driving member that is connected to the output member of the one-way clutch and transmits the rotational power transmitted to the output member to a drive wheel;
an electric motor that is connected to an output shaft of the internal combustion engine so as to rotate the output shaft of the internal combustion engine;
an electric motor generator that is connected to the rotated driving member and configured to transmit the rotational power to the rotated driving member and configured to perform regenerative operation by receiving the rotational power output from the rotated driving member;
and
a controller configured to cut off a fuel supply to the internal combustion engine and control the electric motor to rotate the output shaft of the internal combustion engine while the electric motor generator performs the regenerative operation,
wherein the transmission mechanism is a continuously variable transmission mechanism, and
the controller is configured to change a gear ratio of the transmission mechanism in response to a rotating speed of the rotated driving member such that the rotating speed of the input member is smaller than the rotating speed of the output member.

12 more elements

A vehicle driving method for driving a vehicle comprising:

an internal combustion engine that generates a rotational power with a fuel supply;
a transmission mechanism that changes a speed of the rotational power;
a one-way clutch comprising:
an input member;
an output member;
and
a locking member configured to allow the input member and the output member to be locked or unlocked with each other, the locking member being configured to transmit the rotational power provided to the input member to the output member when the input member and the output member are locked with each other,
wherein the input member and the output member are locked with each other when a forward rotating speed of the input member, which receives the rotational power output from the transmission mechanism, exceeds a forward rotating speed of the output member;
a rotated driving member that is connected to the output member of the one-way clutch and transmits the rotational power transmitted to the output member to a drive wheel;
an electric motor that is connected to an output shaft of the internal combustion engine so as to rotate the output shaft of the internal combustion engine;
and
an electric motor generator that is connected to the rotated driving member and configured to transmit the rotational power to the rotated driving member and configured to perform regenerative operation by receiving the rotational power output from the rotated driving member,
the method comprising:
while performing the regenerative operation,
idling the internal combustion engine for an initial period of time;
cutting off the fuel supply to the internal combustion engine;
and
controlling the electric motor to rotate the output shaft of the internal combustion engine.

15 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/541,086Filed 3 Jul 2012
Priority: JP 2011-18928331 Aug 2011
Published: US 2013/0048395 A128 Feb 2013
Granted: 24 Jun 2014
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

B60W 20/40
Control systems specially adapted for hybrid vehicles: controlling the engagement or disengagement of prime movers, e.g. for transition between…
B60K 6/383
Characterised by the driveline clutches: one-way clutches or freewheel devices
B60K 6/448
Series-parallel type: electrical distribution type
B60K 6/48
Characterised by the architecture of the hybrid electric vehicle: parallel type