Hybrid vehicle and control method of the same
First Claim
1. A hybrid vehicle, comprising:
- an internal combustion engine that is driven to output power for driving the hybrid vehicle;
a motor that is driven to output power for driving the hybrid vehicle;
a target vehicle speed setting unit that sets a target vehicle speed for constant speed drive of the hybrid vehicle;
a mode selection unit that selectively activates either a normal drive mode or a fuel economy priority mode, which places the greater importance on fuel efficiency, in response to a driver'"'"'s operation;
a vehicle speed measurement unit that measures a vehicle speed; and
a constant speed drive control module that, during normal constant speed drive with selective activation of the normal drive mode by the mode selection unit and with setting of the target vehicle speed by the target vehicle speed setting unit, controls the internal combustion engine and the motor to drive the internal combustion engine on a specific drive point curve satisfying a predetermined condition with possible intermittent operation and to make the measured vehicle speed approach to the set target vehicle speed, during fuel economy-priority constant speed drive with selective activation of the fuel economy priority mode by the mode selection unit and with setting of the target vehicle speed by the target vehicle speed setting unit, the constant speed drive control module controlling the internal combustion engine and the motor to drive the internal combustion engine in an efficient drive point range on the specific drive point curve satisfying the predetermined condition with possible intermittent operation and to make the measured vehicle speed approach to the set target vehicle speed.
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Accused Products
Abstract
In the case of the on setting of an eco switch signal ESW, when a torque demand Tr* is less than a good fuel consumption-assuring minimum torque Temin, the hybrid vehicle of the invention stops the operation of an engine and controls a motor MG2 to output a required torque for constant speed drive. When the torque demand Tr* is not less than the good fuel consumption-assuring minimum torque Temin, on the other hand, the engine is driven at a drive point in a good fuel consumption range among drive points on an optimum fuel consumption operation curve to ensure output of the required torque for the constant speed drive. Such control enhances the fuel efficiency for the constant speed drive.
67 Citations
21 Claims
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1. A hybrid vehicle, comprising:
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an internal combustion engine that is driven to output power for driving the hybrid vehicle;
a motor that is driven to output power for driving the hybrid vehicle;
a target vehicle speed setting unit that sets a target vehicle speed for constant speed drive of the hybrid vehicle;
a mode selection unit that selectively activates either a normal drive mode or a fuel economy priority mode, which places the greater importance on fuel efficiency, in response to a driver'"'"'s operation;
a vehicle speed measurement unit that measures a vehicle speed; and
a constant speed drive control module that, during normal constant speed drive with selective activation of the normal drive mode by the mode selection unit and with setting of the target vehicle speed by the target vehicle speed setting unit, controls the internal combustion engine and the motor to drive the internal combustion engine on a specific drive point curve satisfying a predetermined condition with possible intermittent operation and to make the measured vehicle speed approach to the set target vehicle speed, during fuel economy-priority constant speed drive with selective activation of the fuel economy priority mode by the mode selection unit and with setting of the target vehicle speed by the target vehicle speed setting unit, the constant speed drive control module controlling the internal combustion engine and the motor to drive the internal combustion engine in an efficient drive point range on the specific drive point curve satisfying the predetermined condition with possible intermittent operation and to make the measured vehicle speed approach to the set target vehicle speed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A hybrid vehicle, comprising:
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an internal combustion engine that is driven to output power for driving the hybrid vehicle;
a motor that is driven to output power for driving the hybrid vehicle;
a target vehicle speed setting unit that sets a target vehicle speed for constant speed drive of the hybrid vehicle;
a mode selection unit that selects a control mode, in response to a driver'"'"'s operation;
a vehicle speed measurement unit that measures a vehicle speed; and
a constant speed drive control module that, in the case of setting the target vehicle speed by the target vehicle speed setting unit, controls the internal combustion engine and the motor in the selected control mode to make the measured vehicle speed approach to the set target vehicle speed with intermittent operation of the internal combustion engine. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A control method of a hybrid vehicle, the hybrid vehicle having:
- an internal combustion engine that is driven to output power for driving the hybrid vehicle;
a motor that is driven to output power for driving the hybrid vehicle;
a target vehicle speed setting switch that is operated to set a target vehicle speed for constant speed drive of the hybrid vehicle; and
a mode selection switch that is operated by a driver to select either a normal drive mode or a fuel economy priority mode, which places the greater importance on fuel efficiency,in the case of selection of the normal drive mode by the driver'"'"'s operation of the mode selection switch and setting of the target vehicle speed by the target vehicle speed setting switch, the control method controlling the internal combustion on a specific drive point curve satisfying a predetermined condition with possible intermittent operation and to make the measured vehicle speed approach to the set target vehicle speed, in the case of selection of the fuel economy priority mode by the driver'"'"'s operation of the mode selection switch and setting of the target vehicle speed by the target vehicle speed setting switch, the control method controlling the internal combustion engine and the motor to drive the internal combustion engine in an efficient drive point range on the specific drive point curve satisfying the predetermined condition with possible intermittent operation and to make the measured vehicle speed approach to the set target vehicle speed.
- an internal combustion engine that is driven to output power for driving the hybrid vehicle;
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21. A control method of a hybrid vehicle, the hybrid vehicle having:
- an internal combustion engine that is driven to output power for driving the hybrid vehicle;
a motor that is driven to output power for driving the hybrid vehicle;
a target vehicle speed setting switch that is operated to set a target vehicle speed for constant speed drive of the hybrid vehicle; and
a mode selection switch that is operated by a driver to select a control mode,in the case of setting the target vehicle speed by the target vehicle speed setting switch, the control method controlling the internal combustion engine and the motor in the control mode selected by the driver'"'"'s operation of the mode selection switch to make the measured vehicle speed approach to the set target vehicle speed with intermittent operation of the internal combustion engine.
- an internal combustion engine that is driven to output power for driving the hybrid vehicle;
Specification