US 9,849,874 B2Granted

Control system for hybrid vehicle

AssigneeToyota Jidosha Kabushiki Kaisha

InventorsKensei Hata, Makoto Funahashi, Yuji Iwase, Yosuke Suzuki, Hirotatsu Kitabatake, Seitaro Nobuyasu

Life of this patent

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Abstract

A control system of a hybrid vehicle, in which a driving power source for travel includes an engine that is started by cranking, a motor that can control a torque, and a clutch that is coupled with the motor and in which a transmission torque capacity continuously changes depending on a change of a control amount is configured to estimate a torque of the clutch based on the torque that the motor outputs, and change rates of the rotational speed of the motor and the clutch caused by changing the control amount, when the torque that the motor outputs is transmitted by the clutch that is in a slip state by changing the control amount.

Claims8

Dependent claims

A control system for a hybrid vehicle, the control system comprising:

a driving power source configured to travel the hybrid vehicle, the driving power source including a motor, an engine, and a clutch, the motor being configured to output a torque, the engine being configured to be cranked by the motor to start, the clutch being coupled with the motor, and the clutch being configured such that a torque capacity of the clutch continuously changes based on a change of a control amount;
and
an electronic control unit configured to, when the torque that the motor outputs is transmitted to the engine through the clutch in a slip state by changing the control amount, estimate a torque of the clutch based on the torque that the motor outputs, a change rate of a rotational speed of the motor based on a change of the control amount, and a change rate of a rotational speed of a member on a motor side of the clutch based on the change of the control amount.

A control system for a hybrid vehicle, the control system comprising:

a driving power source configured to travel the hybrid vehicle, the driving power source including a motor, an engine, and a clutch, the motor being configured to output a torque, the engine being configured to be cranked by the motor to start, the engine being coupled with the motor via the clutch, and the clutch being configured such that a torque capacity of the clutch continuously changes based on a change of a control amount;
and
an electronic control unit configured to, when the torque is transmitted from the motor via the clutch in a slip state to the engine to crank the engine such that an engine speed is increased, estimate a torque of the clutch based on the torque that the motor outputs, a change rate of a rotational speed of the motor based on an increase in the engine speed, and a change rate of a rotational speed of a member on a motor side of the clutch based on the increase in the engine speed.

Dependencies are inferred from the claim text.

Facts

Application: 14/906,221Filed 15 Jul 2014
Priority: JP 2013-15015719 Jul 2013
Published: US 2016/0159343 A19 Jun 2016
Granted: 26 Dec 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification47 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 6/26
Characterised by apparatus, components or means specially adapted for HEVs: characterised by the motors or the generators
B60K 6/38
Characterised by apparatus, components or means specially adapted for HEVs: characterised by the driveline clutches
B60K 6/387
Characterised by the driveline clutches: actuated clutches, i.e. clutches engaged or disengaged by electric, hydraulic or mechanical actuating means