Honda Motor Co., Ltd.

Fumiyasu Suga

Kazuki Ichikawa

Tsunehiro Kobayashi

Mitsuhiro Iwadare

Satoshi Kodo

Takuya Yamada

A vehicle power transmission device equipped with a crank type transmission unit is provided in which since a first sprocket provided on an input shaft upstream portion and a second sprocket provided on an output shaft downstream portion are connected by an endless chain, and a dog clutch is disposed between the input shaft main body portion and the input shaft upstream portion, when the input shaft main body portion is seized and becomes non-rotatable, the dog clutch is disengaged so as to detach the input shaft upstream portion from the input shaft main body portion, and the driving force of an engine is transmitted to the output shaft downstream portion via the input shaft upstream portion, the first sprocket, the endless chain and the second sprocket, thereby enabling the vehicle to travel in the minimum necessary way.

Vehicle power transmission device

One-way clutches OWCand OWCare provided on output sides of transmissions TMand TM, and the transmissions TMand TMmechanically lock when the output memberof the one-way clutches OWCand OWCis reversely rotated to the backward side. Clutch mechanisms CLand CLare interposed between the output memberand a driving target memberconnected to a driving wheel. According to uphill start conditions, a controllermakes any one of the clutch mechanisms CLand CLenter ON state when a vehicle-backward-movement prevention control is determined to be required and the controllermakes the clutch mechanisms CLand CLenter OFF state when the vehicle-backward-movement prevention control is determined to be not required. Thus, it is possible to provide a vehicle driving system capable of performing a hill hold assist function with a simple control.

Vehicle driving system and control method thereof

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 (); an electric motor (MG) that rotates the output shaft of the internal combustion engine; an electric motor generator (MG) 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 () 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.

Drive system for vehicle and vehicle driving method

A first engine ENG, transmission TM, one-way clutch OWC, driving target memberconnected to an output memberof the one-way clutch, main motor/generator MGconnected to the member, sub motor/generator MGconnected to an output shaft Sof the engine ENG, battery, and controller. The controllerperforms EV running, engine running, and series running where power generated by a sub motor/generator MGusing the power of the first engine ENGis supplied to the main motor/generator MG. Series running is carried out between EV running and the engine running when switching from EV running to engine running is carried out. A rotational speed of the engine and/or a transmission ratio of the transmission are/is controlled so that the rotational speed input to the input member is less than the rotational speed of the output memberduring the series running control.

Vehicle driving system and control method for vehicle driving system

First and second engines ENGand ENG; first and second transmissions TMand TMshifting the output of the first and second engines; first and second one-way clutches OWCand OWCthat are provided in each output portion of the first and second transmissions; a driving target membercommonly connected to the output membersof the first and second one-way clutches via clutch mechanisms CLand CLand transmits the rotational power transmitted to the output members of the one-way clutches to the driving wheel; a main motor/generator MGconnected to the member; a sub motor/generator MGconnected to the output shaft Sof the first engine; a batterysending/receiving the electric power between both motor/generators; a synchronization mechanismconnecting/disconnecting the memberand the output shaft Sof the second engine; and a controller

Vehicle driving system

A vehicle driving systemincludes a first and second engines ENGand ENG, a first and second transmissions TMand TMwith first and second one-way clutches OWCand OWCprovided in each output portion respectively, a driving target memberconnected to output membersof the one-way clutches OWCand OWCin common via clutch mechanisms CLand CL, a main motor/generator MGconnected to the driving target member, and a controller. The controllerdisconnects the clutch mechanisms CLand CLwhen a vehicle runs rearward, the transmissions TMand TM, and runs the vehicle rearward by a reverse rotation operation of the motor/generator MG. The controller otherwise holds the clutch mechanisms CLand CLconnected at the time of a start on an uphill and obtains a hill hold function using a rearward running blocking operation through the transmissions TMand TM

An automobile driving system includes an engine and a transmission. The transmission includes a variable gear ratio mechanism and a gear ratio of the transmission can be set to infinity. A one-way clutch is provided at an output portion of the transmission. At a time of a engine stopping controller controlling to stop the engine, a transmission-and-control device uses inertia from the engine up to an input member of the one-way clutch as assisting force for driving operations of the variable gear ratio mechanism to change the gear ratio at the transmission to infinity or close to infinity, before the engine actually stops.

Growing community of inventors

Saitama, Japan

Fumiyasu Suga