Power output device and method of stopping prime mover in the power output device
First Claim
1. A power output device comprising:
- a prime mover outputting power by means of fuel combustion;
a torque controller interposed between an output shaft of said prime mover and a drive shaft and that controls torque outputted to said drive shaft;
an electric motor capable of inputting and outputting power to and from, respectively, said torque controller;
a prime mover operating state determinater that determines an operating state of said prime mover based on demands imposed on the power output device and outputs an operation stop command to stop operation of said prime mover if it is determined that there is no need to continue operation of said prime mover;
a stop condition determinater that determines whether or not a condition allowing stoppage of said prime mover is met; and
a stop moment control executer that stops fuel supply to said prime mover, applies torque to said output shaft, adjusts rotational deceleration of said output shaft to a predetermined range and stops said prime mover if a command to stop the prime mover in operation is outputted from said prime mover operating state determinater and it is determined by said stop condition determinater that the condition allowing stoppage of said prime mover is met.
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Accused Products
Abstract
A power output device is provided with a planetary gear, an engine having a crank shaft coupled to the planetary gear, a motor secured to a sun gear and a motor secured to a ring gear. Even if there is no need to continue operation of the engine, the engine is not immediately stopped in view of the charge amount of a battery. For example, in the D (drive) range, a processing for stopping rotation of the engine with a predetermined deceleration is performed only if an ABS device is out of operation, the cancellation of reaction force is possible and the vehicle speed is within a predetermined range. Consequently, it is possible to stop the engine while preventing the reaction force from causing a sense of shock to the driver.
200 Citations
10 Claims
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1. A power output device comprising:
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a prime mover outputting power by means of fuel combustion; a torque controller interposed between an output shaft of said prime mover and a drive shaft and that controls torque outputted to said drive shaft; an electric motor capable of inputting and outputting power to and from, respectively, said torque controller; a prime mover operating state determinater that determines an operating state of said prime mover based on demands imposed on the power output device and outputs an operation stop command to stop operation of said prime mover if it is determined that there is no need to continue operation of said prime mover; a stop condition determinater that determines whether or not a condition allowing stoppage of said prime mover is met; and a stop moment control executer that stops fuel supply to said prime mover, applies torque to said output shaft, adjusts rotational deceleration of said output shaft to a predetermined range and stops said prime mover if a command to stop the prime mover in operation is outputted from said prime mover operating state determinater and it is determined by said stop condition determinater that the condition allowing stoppage of said prime mover is met. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of stopping a prime mover in a power output device, comprising:
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determining an operating state of said prime mover based on demands imposed on the power output device including the prime mover outputting power by means of fuel combustion, a torque controller interposed between an output shaft of said prime mover and a drive shaft and controlling torque outputted to said drive shaft and an electric motor capable of inputting and outputting power to and from, respectively, said torque controller, and determining whether or not it is necessary to continue operation of said prime mover; determining whether or not a condition allowing stoppage of said prime mover is met; and stopping fuel supply to said prime mover, applying torque to said output shaft, adjusting rotational deceleration of said output shaft to a predetermined range and performing stop moment control for stopping said prime mover if it is determined that there is no need to continue operation of said prime mover and that the condition allowing stoppage of said prime mover is met.
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Specification