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US 10,864,904 B2Granted
Hybrid vehicle
AssigneeToyota Jidosha Kabushiki Kaisha
InventorKeita Sato
Life of this patent
Estimating the term…
Abstract
On satisfaction of conditions to shift to scavenging control in response to a stop request of an engine, a hybrid vehicle performs engine power limitation control that limits the power output from the engine with an engine upper limit power as an upper limit.
Claims10
A hybrid vehicle comprising:
- an engine;
- a motor generator configured to regenerate power from the engine and to motor the engine;
- and
- a control device configured to control the engine and the motor generator,
- wherein the control device platforms motoring control that controls the motor generator to cut off fuel supply to the engine and to motor the engine from a state that the engine is operated,
- wherein when the engine is to be stopped after the motoring control, the control device causes the engine to be motored at a rotation speed that exceeds a rotation speed range of the engine causing resonance, as the motoring control,
- wherein when a predetermined execution condition is satisfied when an engine stop request is initiated, the control device performs the motoring control and then stops the engine, and
- wherein when the predetermined execution condition is satisfied and the engine stop request has not been initiated, the control device performs power limitation control that controls the engine and the motor generator to cause power to be output from the engine with a predetermined engine upper limit power or a predetermined engine upper limit torque as an upper limit and to rotate the engine at a target rotation speed in load operation of the engine accompanied with regeneration of power by the motor generator, and
- wherein, when the predetermined execution prediction is satisfied and the engine stop request has not been initiated, the control device performs on of:
- i. sets a smaller power, the smaller power being the smaller of the engine upper limit power and a vehicle required power required for the vehicle based on an accelerator position, and causes the set smaller power to be output from the engine;
- and
- ii. sets a smaller torque, the smaller torque being the smaller of the engine upper limit torque and an engine torque set using the vehicle required power and an operation line, and causes the set smaller torque to be output from the engine, as the power limitation control.
9 more elements
A hybrid vehicle comprising,
- an engine;
- a motor generator configured to regenerate power from the engine and to motor the engine;
- and
- a control device configured to control the engine and the motor generator,
- wherein the control device performs motoring control that controls the motor generator to cut off fuel supply to the engine and to motor the engine from a state that the engine is operated,
- wherein when the engine is to be stopped after the motoring control, the control device causes the engine to be motored at a rotation speed that exceeds a rotation speed range of the engine causing resonance, as the motoring control,
- wherein when a predetermined execution condition is satisfied when an engine stop request is initiated, the control device performs the motoring control and then stops the engine,
- wherein when the predetermined execution condition is satisfied and the engine stop request has not been initiated, the control device performs rotation speed limitation control that controls the engine to be operated at a predetermined engine lower limit rotation speed as a lower limit, and
- wherein, when the predetermined execution condition is satisfied and the engine stop request has not been initiated, the control device,
- i. sets an engine rotation speed by using a vehicle required power required for the vehicle based on an accelerator position and an operation line;
- ii. sets the greater rotation speed between the engine lower limit rotation speed and the set engine rotation speed, and
- iii. causes the engine to be motored at the set greater rotation speed, as the rotation speed limitation control.
9 more elements
A hybrid vehicle, comprising:
- an engine;
- a motor generator configured to regenerate power from the engine and to motor the engine;
- and
- a control device configured to control the engine and the motor generator,
- wherein the control device performs motoring control that controls the motor generator to cut off fuel supply to the engine and to motor the engine from a state that the engine is operated and
- when the engine is to be stopped after the motoring control, the control device causes the engine to be motored at a rotation speed that exceeds a rotation speed range of the engine causing resonance, as the motoring control, and
- wherein when a predetermined execution condition is satisfied when an engine stop request is initiated, the control device performs the motoring control and then stops the engine, and
- wherein, when the predetermined execution condition is satisfied and the engine stop request has not been initiated, the control device performs regeneration limitation control that controls the motor generator to regenerate power with a predetermined negative motor lower limit torque as a lower limit in load operation of the engine accompanied with regeneration of power by the motor generator, and
- wherein when the predetermined execution condition is satisfied and the engine stop request has not been initiated, the control device;
- i. sets a negative torque that is to be output from the motor generator to operate the engine at a target rotation speed,
- ii. sets the greater torque between the motor lower limit torque and the set negative torque;
- and
- iii. causes the set greater torque to be output from the motor generator, as regeneration limitation control.
10 more elements
Dependencies are inferred from the claim text.