US6208034B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power output device and control method of the power output device and hybrid vehicle driven by the power output device
Assignee: Toyota Motor Corp
•
Filing: 1999-04-09
•
Granted: 2001-03-27
•
Expires: 2019-04-09
Abstract
Abstract A power output device is provided with an internal combustion engine having an output shaft, an electric motor for generating and receiving electric power and for rotating a rotation shaft, a drive shaft mechanically connected to the output and the rotation shaft, and a battery for supplying electric power to the electric motor and storing electric power from the electric motor. When a vehicle mounting the power output device drives normally, a target torque of the motor is determined by the PI (Proportional Integral) control. When the vehicle drives with the engine stopping or idling, however, a target torque is determined to be substantially zero. Then an electric power for the control of the electric motor is prevented from being consumed. While such a control is executed, a target torque of the electric motor is determined by the PI control when the drive shaft is locked. Consequently, even when the drive shaft is locked, the rotation speed of the engine is kept to be substantially constant. Then such problems as a resonance and etc. of the power output device can be avoided and the vehicle drives stably.
Inventors
- 👤 Katsuhiko Yamaguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:22
CPC Classifications
B; B60; B60W; B60W20/00; B60K; B60K6/00; B60K6/20; B60K6/22; B60K6/36; B60K6/365; B60K6/40; B60K6/42; B60K6/44; B60K6/445; B60L; B60L50/00; B60L50/50; B60L50/60; B60L50/61; B60W10/00; B60W10/04; B60W10/06; B60W10/08; B60W10/24; B60W10/26; B60L2240/00; B60L2240/40; B60L2240/42; B60L2240/423; B60W50/00; B60W2050/0001; B60W2050/0002; B60W2050/0008; B60W2050/001; B60W2710/00; B60W2710/06; B60W2710/0666; B60W2710/08; B60W2710/083; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/62; Y02T10/64; Y02T10/70; Y02T10/7072; Y10; Y10S; Y10S903/00; Y10S903/902; Y10S903/903; Y10S903/904; Y10S903/905; Y10S903/906; Y10S903/909; Y10S903/91; Y10S903/951
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
167 words
A power output device comprising: an internal combustion engine having an output shaft; an electric motor for generating and receiving electric power and for rotating a rotation shaft; a drive shaft mechanically connected to the output shaft of said internal combustion engine and the rotation shaft of said electric motor for rotating at the same rotation speed as or a different rotation speed from the output shaft; a battery for supplying electric power to said electric motor and for storing electric power from said electric motor; a torque determinater for determining output torque of said internal combustion engine and for relating the output torque to a requested power; an electric motor controller that feedback-controls said electric motor so that the output power from said drive shaft is equal to the requested power; and a second electric motor controller that controls said electric motor so that the output torque of said electric motor is substantially zero when the output torque of said internal combustion engine is substantially zero.
Claim 2
Dependent Claim
167 words
A power output device comprising: an internal combustion engine having an output shaft; an electric motor for generating and receiving electric power and for rotating a rotation shaft; a drive shaft mechanically connected to the output shaft of said internal combustion engine and the rotation shaft of said electric motor for rotating at the same rotation speed as or a different rotation speed from the output shaft; a battery for supplying electric power to said electric motor and for storing electric power from said electric motor; a torque determinater for determining output torque of said internal combustion engine and for relating the output torque to a requested power; an electric motor controller that feedback-controls said electric motor so that the output power from said drive shaft is equal to the requested power; and a second electric motor controller that controls said electric motor so that the output torque of said electric motor is substantially zero when the output torque of said internal combustion engine is substantially zero.
Claim 3
Dependent Claim
98 words
The power output device according to claim 1 , further comprising a prevention determinater that determines whether or not an operating condition of said internal combustion engine should be avoided on the basis of the operating condition of said internal combustion engine, said electric motor and said drive shaft, wherein said second electric motor controller controls said electric motor so that the output torque of said electric motor is substantially zero when the output torque of said internal combustion engine is substantially zero and the operating condition of said internal combustion engine does not need to be avoided.
Claim 4
Dependent Claim
56 words
The power output device according to claim 2 , wherein said prevention determinater includes rotation detecting means for detecting rotation speed of said drive shaft and prevention determining means for determining whether or not an operating condition of said internal combustion engine shouldbe avoided on the basis of the operation speed of said internal combustion engine.
Claim 5
Dependent Claim
61 words
The power output device according to claim 3 , wherein said prevention determinater determines the operating condition of said internal combustion engine to be avoided until a predetermined time passes after the rotation speed of said internal combustion engine departs from the rotation speed to be avoided once the operating condition of said internal combustion engine is determined to be avoided.
Claim 6
Dependent Claim
36 words
The power output device according to claim 1 , further comprising a planetary gear mechanically connecting together the output shaft of said internal combustion engine, the rotation shaft of said electric motor, and said drive shaft.
Claim 7
Dependent Claim
157 words
A control method for a power output device having an internal combustion engine with an output shaft, an electric motor for generating and receiving electric power and for rotating a rotation shaft, a drive shaft mechanically connected to the output shaft of said internal combustion engine and the rotation shaft of said electric motor for rotating at the same rotation speed as or a different rotation speed from the output shaft, and a battery for supplying electric power to said electric motor and for storing electric power from said electric motor, comprising: determining output torque of said internal combustion engine and relating the output torque to a requested power; feedback-controlling said electric motor so that the output power from said drive shaft is equal to the requested power; and controlling said electric motor so that the output torque of said electric motor is substantially zero when the output torque of said internal combustion engine is substantially zero.
Claim 8
Dependent Claim
157 words
A control method for a power output device having an internal combustion engine with an output shaft, an electric motor for generating and receiving electric power and for rotating a rotation shaft, a drive shaft mechanically connected to the output shaft of said internal combustion engine and the rotation shaft of said electric motor for rotating at the same rotation speed as or a different rotation speed from the output shaft, and a battery for supplying electric power to said electric motor and for storing electric power from said electric motor, comprising: determining output torque of said internal combustion engine and relating the output torque to a requested power; feedback-controlling said electric motor so that the output power from said drive shaft is equal to the requested power; and controlling said electric motor so that the output torque of said electric motor is substantially zero when the output torque of said internal combustion engine is substantially zero.
Claim 9
Dependent Claim
91 words
The control method of a power output device according to claim 6 , further comprising: detecting a parameter indicating the operating condition of said power output device; determining whether or not an operating condition of said internal combustion engine should be avoided on the basis of said parameter; controlling said electric motor so that the output torque of said electric motor is substantially zero when the output torque of said internal combustion engine is substantially zero and an operating condition of said internal combustion engine does not need to be avoided.
Claim 10
Dependent Claim
194 words
A hybrid vehicle with a wheel shaft driven by a power output device comprising: an internal combustion engine having an output shaft; an electric motor for generating and receiving electric power and for rotating a rotation shaft; a drive shaft connected to said wheel shaft and mechanically connected to the output shaft of said internal combustion engine and the rotation shaft of said electric motor for rotating at the same rotation speed as or a different rotation speed from the output shaft; a battery for supplying electric power to said electric motor and storing electric power from said electric motor; a torque determinater for determining output torque of said internal combustion engine and for relating the output torque to a requested power; an electric motor controller that feedback-controls said electric motor so that the output power from said drive shaft is equal to the requested power; a lock determinater that determines whether said wheel shaft is locked or not; and a second electric motor controller that controls said electric motor so that the output torque of said electric motor is substantially zero when the output torque of said internal combustion engine is substantially zero.
Claim 11
Dependent Claim
194 words
A hybrid vehicle with a wheel shaft driven by a power output device comprising: an internal combustion engine having an output shaft; an electric motor for generating and receiving electric power and for rotating a rotation shaft; a drive shaft connected to said wheel shaft and mechanically connected to the output shaft of said internal combustion engine and the rotation shaft of said electric motor for rotating at the same rotation speed as or a different rotation speed from the output shaft; a battery for supplying electric power to said electric motor and storing electric power from said electric motor; a torque determinater for determining output torque of said internal combustion engine and for relating the output torque to a requested power; an electric motor controller that feedback-controls said electric motor so that the output power from said drive shaft is equal to the requested power; a lock determinater that determines whether said wheel shaft is locked or not; and a second electric motor controller that controls said electric motor so that the output torque of said electric motor is substantially zero when the output torque of said internal combustion engine is substantially zero.
Claim 12
Dependent Claim
107 words
The hybrid vehicle with a wheel shaft driven by a power output device according to claim 8 , further comprising a prevention determinater that determines whether or not an operating condition of said internal combustion engine should be avoided on the basis of the operating condition of said internal combustion engine, said electric motor and said drive shaft, wherein said second electric motor controller controls said electric motor so that the output torque of said electric motor is substantially zero when the output torque of said internal combustion engine is substantially zero and the operating condition of said internal combustion engine does not need to be avoided.
References Cited (Backward Citations)
JPS5030223A
Cited
US4335429A
Cited
US5343970A
Cited
US5698905A
Cited
US5865263A
Cited
US6054776A
Cited
US6067801A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-03-26 | 2004-09-25 | 2005-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-03-26 | 2008-09-25 | 2009-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-03-26 | 2012-09-25 | 2013-03-27 | $7700.00 | Window Closed / Lapsed |