Electronic control unit for controlling sequential gearshift ranges of vehicles
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsKoji Yamamoto, Yasuhiro Kaya, Kiyoshiro Ueoka, Kensuke Kamichi
Life of this patent
Estimating the term…
Abstract
In response to an upshift of a gearshift position SP in a sequential gearshift range, the drive control of the invention once lowers the rotation speed Ne of an engine. This variation in rotation speed of the engine enables the driver to have adequate gear change feeling, which is similar to the familiar gear change feeling in a conventional motor vehicle equipped with a stepped automatic transmission. Namely the drive control of the invention effectively prevents the driver from feeling something is wrong.
Claims21
A electronic control unit for controlling a sequential gearshift range of a motor vehicle equipped with an internal combustion engine, a power transmission assembly, and a motor, where the power transmission assembly transmits at least part of output power of the internal combustion engine, which is driven at an arbitrary drive point regardless of a gearshift position, to an axle and the motor is capable of outputting power to the axle,
- said electronic control unit comprising:
- a driving force demand setting module that sets a driving force demand to be output to the axle;
- an effective drive point setting module that,
- in the case of no change of the gearshift position, sets an effective drive point to a specific drive point determined under a preset restriction according to the driving force demand, and
- in the case of a change of the gearshift position, sets the effective drive point to an updated drive point with at least a change of a rotation speed of the internal combustion engine from the specific drive point determined under the preset restriction according to the driving force demand;
- and
- a control module that controls the internal combustion engine, the power transmission assembly, and the motor to drive the internal combustion engine at the set effective drive point and to ensure output of a driving force equivalent to the driving force demand to the axle.
A control method of controlling a sequential gearshift range executed by a electronic control unit of a motor vehicle equipped with an internal combustion engine, a power transmission assembly, and a motor, where the power transmission assembly transmits at least part of output power of the internal combustion engine, which is driven at an arbitrary drive point regardless of a gearshift position, to an axle and the motor is capable of outputting power to the axle,
- said control method comprising the steps of:
- (a) in the case of no change of the gearshift position, setting an effective drive point to a specific drive point determined under a preset restriction according to a driving force demand specified as a requirement to be output to the axle and controlling the internal combustion engine, the power transmission assembly, and the motor to drive the internal combustion engine at the set effective drive point and to ensure output of a driving force equivalent to the driving force demand to the axle;
- and
- (b) in the case of a change of the gearshift position, setting the effective drive point to an updated drive point with at least a change of a rotation speed of the internal combustion engine from the specific drive point determined under the preset restriction according to the driving force demands;
- and
- (c) controlling the internal combustion engine, the power transmission assembly, and the motor to drive the internal combustion engine at the set effective drive point and to ensure output of a driving force equivalent to the driving force demand to the axle.
A electronic control unit for controlling a sequential gearshift range of a motor vehicle equipped with an internal combustion engine, a power transmission assembly, and a motor, where the power transmission assembly transmits at least part of output power of the internal combustion engine, which is driven at an arbitrary drive point regardless of a gearshift position, to an axle and the motor is capable of outputting power to the axle,
- said electronic control unit comprising:
- a driving force demand setting module that sets a driving force demand to be output to the axle;
- an effective drive point setting module that,
- in the case of no change of the gearshift position, sets an effective drive point to a specific drive point determined under a preset restriction according to the driving force demand, and
- in the case of an upshift of the gearshift position, sets the effective drive point to an updated drive point with at least a decrease of a rotation speed of the internal combustion engine from the specific drive point determined under the preset restriction according to the driving force demand;
- and
- a control module that controls the internal combustion engine, the power transmission assembly, and the motor to drive the internal combustion engine at the set effective drive point and to ensure output of a driving force equivalent to the driving force demand to the axle.
A electronic control unit for controlling a sequential gearshift range of a motor vehicle equipped with an internal combustion engine, a power transmission assembly, and a motor, where the power transmission assembly transmits at least part of output power of the internal combustion engine, which is driven at an arbitrary drive point regardless of a gearshift position, to an axle and the motor is capable of outputting power to the axle,
- said electronic control unit comprising:
- a driving force demand setting module that sets a driving force demand to be output to the axle;
- an effective drive point setting module that,
- in the case of no change of the gearshift position, sets an effective drive point to a specific drive point determined under a preset restriction according to the driving force demand, and
- in the case of a downshift of the gearshift position, sets the effective drive point to an updated drive point with at least an increase of a rotation speed of the internal combustion engine from the specific drive point determined under the preset restriction according to the driving force demand;
- and
- a control module that controls the internal combustion engine, the power transmission assembly, and the motor to drive the internal combustion engine at the set effective drive point and to ensure output of a driving force equivalent to the driving force demand to the axle.
Dependencies are inferred from the claim text.