EP0819561A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Driving System
Assignee: Toyota Motor Corp
•
Filing: 1997-06-02
•
Granted: —
•
Expires: 2017-06-02
Abstract
Abstract In the process of starting an engine 150, the structure of the present invention lags an open and close timing of an intake valve 152 of the engine 150, thereby enabling a first motor MG1 mechanically linked with a crankshaft 156 via a damper 157 to motor the engine 150. When the revolving speed of the engine 150 exceeds a specific range that causes a resonance, the open and close timing of the intake valve 152 is returned to an ordinary level, so as to start controls of a fuel supply to the engine 150 and ignition. The lagged open and close timing of the intake valve 152 decreases the effective compression ratio of the engine 150, thus enabling smooth rotations of the engine 150 and reducing the amplitude of the torsional vibrations of the crankshaft 156. This structure enables the revolving speed of the engine 150 to swiftly pass through the specific range that causes a resonance.
Inventors
- 👤 Masaaki Yamaoka
- 👤 Tetsuya Abe
- 👤 Hideaki Matsui
- 👤 Yutaka Taga
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 19:00
CPC Classifications
B; B60; B60K; B60K6/00; B60K6/20; B60K6/22; B60K6/36; B60K6/365; B60K6/42; B60K6/44; B60K6/445; B60K6/50; B60K6/54; B60L; B60L15/00; B60L15/007; B60L15/20; B60L50/00; B60L50/10; B60L50/16; B60L50/50; B60L50/60; B60L50/61; B60W; B60W10/00; B60W10/02; B60W10/04; B60W10/06; B60W10/08; B60W10/24; B60W10/26; B60W20/00; B60W20/10; B60W20/11; F; F02; F02D; F02D13/00; F02D13/02; F02D13/0223; F02D13/0234; B60L2240/00; B60L2240/40; B60L2240/42; B60L2240/421; B60L2240/423; B60L2240/44; B60L2240/441; B60L2240/443; B60L2240/48; B60L2240/486; B60L2250/00; B60L2250/26; B60W50/00; B60W2050/0001; B60W2050/0043; B60W2050/0052; F02D13/0269; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y02T10/60; Y02T10/62; Y02T10/64; Y02T10/70; Y02T10/7072; Y02T10/72; Y10; Y10S; Y10S903/00; Y10S903/902; Y10S903/903; Y10S903/904; Y10S903/905; Y10S903/909; Y10S903/91; Y10S903/915; Y10S903/917; Y10S903/946
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
166 words
A driving system comprising: an internal combustion engine connecting with an output
shaft via a damper; a motor having a rotating shaft mechanically connected to
said output shaft; compression ratio varying means for varying an effective
compression ratio of said internal combustion engine; driving state detecting means for detecting a driving state
of said internal combustion engine; motor control means for driving and controlling said motor
in response to a predetermined driving requirement, in order to
motor said internal combustion engine while a fuel supply to said
internal combustion engine is stopped; and compression ratio regulation means for, when the driving
state of said internal combustion engine detected by said driving
state detecting means in the process of motoring by said motor
control means is within a predetermined range, regulating said
compression ratio varying means to make the effective compression
ratio of said internal combustion engine lower in the driving
state within said predetermined range than that in the driving
state out of said predetermined range.
Claim 2
Dependent Claim
36 words
A driving system in accordance with claim 1, wherein said
predetermined range includes a specific range, in which a system
comprising said internal combustion engine, said damper, and said
motor causes a resonance of a torsion.
Claim 3
Dependent Claim
32 words
A driving system in accordance with claim 2, wherein said
compression ratio varying means comprises means for regulating
an open and close timing of an intake valve of said internal
combustion engine.
Claim 4
Dependent Claim
118 words
A driving system in accordance with claim 3, said driving
system further comprising: operation starting means for, when the driving state of said
internal combustion engine detected by said driving state
detecting means reaches a predetermined driving condition after
a starting requirement of said internal combustion engine,
initiating a fuel supply to said internal combustion engine and
ignition, so as to start operation of said internal combustion
engine, wherein said predetermined driving requirement is said
starting requirement of said internal combustion engine, said predetermined range is included in a certain range from
a start of motoring said internal combustion engine to a point
at which the driving state of said internal combustion engine
reaches said predetermined driving condition.
Claim 5
Dependent Claim
93 words
A driving system in accordance with claim 3, said driving
system further comprising: fuel supply stopping means for stopping a fuel supply to said
internal combustion engine, in response to an operation stop
requirement of said internal combustion engine, wherein said predetermined driving requirement is said
operation stop requirement of said internal combustion engine, said predetermined range is a range from a point at which
the driving state of said internal combustion engine detected
by said driving state detecting means reaches said predetermined
driving condition to a stop of said internal combustion engine.
Claim 6
Dependent Claim
111 words
A driving system in accordance with either one of claims
4 and 5, said driving system further comprising: three shaft-type power input/output means having three
shafts respectively and mechanically linked with said output
shaft, said rotating shaft of said motor, and a drive shaft, when
powers are input to and output from any two shafts among said
three shafts, said power input/output means inputting and
outputting power, which is determined according to the input and
output powers, to and from a residual one shaft; and a second motor for inputting and outputting power to and from
either one of said output shaft of said internal combustion engine
and said drive shaft.
Claim 7
Dependent Claim
146 words
A driving system comprising: an internal combustion engine connecting with an output
shaft via a damper; a motor having a rotating shaft mechanically connected to
said output shaft; driving state detecting means for detecting a driving state
of said internal combustion engine; and motor control means for driving and controlling said motor
in response to a predetermined driving requirement, in order to
motor said internal combustion engine while a fuel supply to said
internal combustion engine is stopped, wherein said motor control means comprises means for, when
the driving state detected by said driving state detecting means
is within a predetermined range, driving and controlling said
motor, so as to enable said output shaft of said internal
combustion engine to rotate at a greater rotational angular
acceleration in the driving state within said predetermined range
than that in the driving state out of said predetermined range.
Claim 8
Dependent Claim
36 words
A driving system in accordance with claim 7, wherein said
predetermined range includes a specific range, in which a system
comprising said internal combustion engine, said damper, and said
motor causes a resonance of a torsion.
Claim 9
Dependent Claim
118 words
A driving system in accordance with claim 8, said driving
system further comprising: operation starting means for, when the driving state of said
internal combustion engine detected by said driving state
detecting means reaches a predetermined driving condition after
a starting requirement of said internal combustion engine,
initiating a fuel supply to said internal combustion engine and
ignition, so as to start operation of said internal combustion
engine, wherein said predetermined driving requirement is said
starting requirement of said internal combustion engine, said predetermined range is included in a certain range from
a start of motoring said internal combustion engine to a point
at which the driving state of said internal combustion engine
reaches said predetermined driving condition.
Claim 10
Dependent Claim
105 words
A driving system in accordance with claim 8, said driving
system further comprising: fuel supply stopping means for stopping a fuel supply to said
internal combustion engine prior to motoring said internal
combustion engine by said motor control means, in response to
an operation stop requirement of said internal combustion engine, wherein said predetermined driving requirement is said
operation stop requirement of said internal combustion engine, said predetermined range is a range from a point at which
the driving state of said internal combustion engine detected
by said driving state detecting means reaches said predetermined
driving condition to a stop of said internal combustion engine.
Claim 11
Dependent Claim
111 words
A driving system in accordance with either one of claims
9 and 10, said driving system further comprising: three shaft-type power input/output means having three
shafts respectively and mechanically linked with said output
shaft, said rotating shaft of said motor, and a drive shaft, when
powers are input to and output from any two shafts among said
three shafts, said power input/output means inputting and
outputting power, which is determined according to the input and
output powers, to and from a residual one shaft; and a second motor for inputting and outputting power to and from
either one of said output shaft of said internal combustion engine
and said drive shaft.
Claim 12
Dependent Claim
134 words
A driving system comprising: an internal combustion engine connecting with an output
shaft via a damper; a motor having a rotating shaft mechanically connected to
said output shaft; motor control means for driving and controlling said motor
in response to a predetermined driving requirement, in order to
motor said internal combustion engine while a fuel supply to said
internal combustion engine is stopped; resonance energy measuring means for measuring resonance
energy of a torsion of a system comprising said internal
combustion engine, said damper, and said motor; and motoring stop means for, when the resonance energy measured
by said resonance energy measuring means is not less than a
predetermined value, driving and controlling said motor to stop
motoring said internal combustion engine, irrespective of the
control of said motor by said motor control means.
Claim 13
Dependent Claim
22 words
A driving system in accordance with claim 12, wherein
said predetermined driving requirement is said starting
requirement of said internal combustion engine.
Claim 14
Dependent Claim
106 words
A driving system in accordance with claim 13, said driving
system further comprising: three shaft-type power input/output means having three
shafts respectively and mechanically linked with said output
shaft, said rotating shaft of said motor, and a drive shaft, when
powers are input to and output from any two shafts among said
three shafts, said power input/output means inputting and
outputting power, which is determined according to the input and
output powers, to and from a residual one shaft; and a second motor for inputting and outputting power to and from
either one of said output shaft of said internal combustion engine
and said drive shaft.
Claim 15
Dependent Claim
151 words
A driving system comprising: an internal combustion engine connecting with an output
shaft via a damper; a motor having a rotating shaft mechanically connected to
said output shaft; motor control means for driving and controlling said motor
in response to a predetermined driving requirement, in order to
motor said internal combustion engine while a fuel supply to said
internal combustion engine is stopped; driving state detecting means for detecting a driving state
of said internal combustion engine; time counting means for counting a time period for which the
driving state detected by said driving state detecting means is
continuously kept in a predetermined range; and motoring stop means for, when the time period counted by said
time counting means is not shorter than a predetermined time
period, driving and controlling said motor to stop motoring said
internal combustion engine, irrespective of the control of said
motor by said motor control means.
Claim 16
Dependent Claim
22 words
A driving system in accordance with claim 15, wherein
said predetermined driving requirement is said starting
requirement of said internal combustion engine.
Claim 17
Dependent Claim
36 words
A driving system in accordance with claim 16, wherein
said predetermined range includes a specific range, in which a
system comprising said internal combustion engine, said damper,
and said motor causes a resonance of a torsion.
Claim 18
Dependent Claim
106 words
A driving system in accordance with claim 17, said driving
system further comprising: three shaft-type power input/output means having three
shafts respectively and mechanically linked with said output
shaft, said rotating shaft of said motor, and a drive shaft, when
powers are input to and output from any two shafts among said
three shafts, said power input/output means inputting and
outputting power, which is determined according to the input and
output powers, to and from a residual one shaft; and a second motor for inputting and outputting power to and from
either one of said output shaft of said internal combustion engine
and said drive shaft.
References Cited (Backward Citations)
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