US5265572A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Throttle actuator
Assignee: Hitachi Ltd
•
Filing: 1992-05-20
•
Granted: 1993-11-30
•
Expires: 2012-05-20
Abstract
Abstract A throttle actuator comprising: a body which forms an intake passage; a throttle valve shaft; a throttle valve which is connected to the throttle valve shaft and which adjusts the opening of the intake passage; and a motor which applies torque to the throttle valve shaft. The throttle valve is provided with: a valve shaft lever; an accelerator lever which is operated by means of the accelerator pedal; a floating lever which is positioned between the valve shaft lever and the accelerator lever and which transmits torque to the valve shaft lever in such a direction that the throttle valve opens; a valve returning spring which applies torque to the throttle valve shaft in such a direction that the throttle valve closes; a coupler spring which pulls the accelerator lever and the floating lever toward each other; and an accelerator lever returning spring which applies torque to the accelerator lever in such a direction that the throttle valve closes. A difference between the amount of operation caused by the action of the accelerator pedal and the amount of operation caused by the motor is offset by the relationships between the set positions of floating lever and the coupler spring and between the set positions of the floating lever and the valve shaft lever.
Inventors
- 👤 Yuzo Kadomukai
- 👤 Teruhiko Minegishi
- 👤 Eiji Sato
- 👤 Naoyuki Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:23
CPC Classifications
F; F02; F02D; F02D11/00; F02D11/06; F02D11/10; F02D11/107; F02D9/00; F02D9/02; F02D2009/0201; F02D2009/0255; F02D2009/0262; F02D2009/0264; F02D2009/0267; F02D2011/101; F02D2011/103
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
172 words
A throttle actuator comprising: a body which forms an intake passage; a throttle valve shaft supported by said body; a throttle valve which is connected to said throttle valve shaft and which adjusts the opening and closing of said intake passage; and an electronically controlled motor for adjusting the position of said throttle valve to open and close said intake passage in accordance with a throttle operation which is performed by means of an accelerator pedal, wherein said throttle valve shaft comprises: a valve shaft lever for rotating said throttle valve shaft; an accelerator lever which is operated by said accelerator pedal; a floating lever which is positioned between said valve shaft lever and said accelerator lever and which transmits torque to said valve shaft lever in a direction causing said throttle valve to open; a valve returning spring which applies torque to said throttle valve shaft in a direction causing said throttle valve to close; and a coupler spring which pulls said accelerator lever and said floating lever toward each other.
Claim 2
Dependent Claim
172 words
A throttle actuator comprising: a body which forms an intake passage; a throttle valve shaft supported by said body; a throttle valve which is connected to said throttle valve shaft and which adjusts the opening and closing of said intake passage; and an electronically controlled motor for adjusting the position of said throttle valve to open and close said intake passage in accordance with a throttle operation which is performed by means of an accelerator pedal, wherein said throttle valve shaft comprises: a valve shaft lever for rotating said throttle valve shaft; an accelerator lever which is operated by said accelerator pedal; a floating lever which is positioned between said valve shaft lever and said accelerator lever and which transmits torque to said valve shaft lever in a direction causing said throttle valve to open; a valve returning spring which applies torque to said throttle valve shaft in a direction causing said throttle valve to close; and a coupler spring which pulls said accelerator lever and said floating lever toward each other.
Claim 3
Dependent Claim
35 words
A throttle actuator according to claim 1, wherein said throttle valve shaft further comprises an accelerator lever returning spring which applies torque to said accelerator lever in a direction causing said throttle valve to close.
Claim 4
Dependent Claim
182 words
A throttle actuator comprising: a body which forms an intake passage; a throttle valve shaft supported by said body; a throttle valve which is connected to said throttle valve shaft and which adjusts the opening and closing of said intake passage; and a motor which applies torque to said throttle valve shaft to control the opening and closing of said intake passage by adjusting the position of said throttle valve; wherein said throttle valve comprises: a valve shaft lever for rotating said throttle valve shaft; an accelerator lever which is operated by an accelerator pedal; a floating lever which is positioned between said valve shaft lever and said accelerator lever and which transmits torque to said valve shaft lever in a direction causing said throttle valve to open; a valve returning spring which applies torque to said throttle valve shaft in a direction causing said throttle valve to close; a coupler spring which pulls said accelerator lever and said floating lever toward each other; and an accelerator lever returning spring which applies torque to said accelerator lever to close said throttle valve.
Claim 5
Dependent Claim
182 words
A throttle actuator comprising: a body which forms an intake passage; a throttle valve shaft supported by said body; a throttle valve which is connected to said throttle valve shaft and which adjusts the opening and closing of said intake passage; and a motor which applies torque to said throttle valve shaft to control the opening and closing of said intake passage by adjusting the position of said throttle valve; wherein said throttle valve comprises: a valve shaft lever for rotating said throttle valve shaft; an accelerator lever which is operated by an accelerator pedal; a floating lever which is positioned between said valve shaft lever and said accelerator lever and which transmits torque to said valve shaft lever in a direction causing said throttle valve to open; a valve returning spring which applies torque to said throttle valve shaft in a direction causing said throttle valve to close; a coupler spring which pulls said accelerator lever and said floating lever toward each other; and an accelerator lever returning spring which applies torque to said accelerator lever to close said throttle valve.
Claim 6
Dependent Claim
186 words
A throttle actuator comprising: a body which forms an intake passage; a throttle valve shaft; a throttle valve which is connected to said throttle valve shaft and which adjusts the opening of said intake passage; and a motor which applies torque to said throttle valve, wherein said throttle valve shaft is provided with: a valve shaft lever which is operated by means of an accelerator pedal; a floating lever which is positioned between said valve shaft lever and said accelerator lever and which transmits a torque to said valve shaft lever in such a direction that said throttle valve opens; a valve returning spring which applies torque to said throttle valve shaft in such a direction that said throttle valve closes; a coupler spring which pulls said accelerator lever and said floating lever toward each other; and an accelerator lever returning spring which applies torque to said accelerator lever in such a direction that said throttle valve closes, wherein the spring constant of said coupler spring is smaller than the sum of the spring constants of said valve returning spring and said accelerator lever returning spring.
Claim 7
Dependent Claim
186 words
A throttle actuator comprising: a body which forms an intake passage; a throttle valve shaft; a throttle valve which is connected to said throttle valve shaft and which adjusts the opening of said intake passage; and a motor which applies torque to said throttle valve, wherein said throttle valve shaft is provided with: a valve shaft lever which is operated by means of an accelerator pedal; a floating lever which is positioned between said valve shaft lever and said accelerator lever and which transmits a torque to said valve shaft lever in such a direction that said throttle valve opens; a valve returning spring which applies torque to said throttle valve shaft in such a direction that said throttle valve closes; a coupler spring which pulls said accelerator lever and said floating lever toward each other; and an accelerator lever returning spring which applies torque to said accelerator lever in such a direction that said throttle valve closes, wherein the spring constant of said coupler spring is smaller than the sum of the spring constants of said valve returning spring and said accelerator lever returning spring.
Claim 8
Dependent Claim
201 words
A throttle actuator comprising: a body which forms an intake passage; a throttle valve shaft; a throttle valve which is connected to said throttle valve shaft and which adjusts the opening of said intake passage; and a motor which applies torque to said throttle valve shaft; wherein said throttle valve shaft is provided with: a valve shaft lever; an accelerator lever which is operated by an accelerator pedal; a floating lever which is positioned between said valve shaft lever and said accelerator lever and which transmits a torque to said valve shaft lever in such a direction that said throttle valve opens; a valve returning spring which applies torque to said throttle valve shaft in such a direction that said throttle valve closes; a coupler spring which pulls said accelerator lever and said floating lever toward each other; and an accelerator lever returning spring which applies torque to said accelerator lever in such a direction that said throttle valve closes, wherein torque generated by the initial deformation of said coupler spring so as to pull said accelerator lever and said floating lever toward each other is greater than said valve returning spring torque generated when said throttle valve is fully open.
Claim 9
Dependent Claim
201 words
A throttle actuator comprising: a body which forms an intake passage; a throttle valve shaft; a throttle valve which is connected to said throttle valve shaft and which adjusts the opening of said intake passage; and a motor which applies torque to said throttle valve shaft; wherein said throttle valve shaft is provided with: a valve shaft lever; an accelerator lever which is operated by an accelerator pedal; a floating lever which is positioned between said valve shaft lever and said accelerator lever and which transmits a torque to said valve shaft lever in such a direction that said throttle valve opens; a valve returning spring which applies torque to said throttle valve shaft in such a direction that said throttle valve closes; a coupler spring which pulls said accelerator lever and said floating lever toward each other; and an accelerator lever returning spring which applies torque to said accelerator lever in such a direction that said throttle valve closes, wherein torque generated by the initial deformation of said coupler spring so as to pull said accelerator lever and said floating lever toward each other is greater than said valve returning spring torque generated when said throttle valve is fully open.
Claim 10
Dependent Claim
26 words
A throttle actuator according to claim 3, further comprising a motor returning spring which applies to said motor torque which causes said throttle valve to close.
Claim 11
Dependent Claim
251 words
A throttle actuator comprising: a body which forms an intake passage; a throttle valve shaft supported by said body; a throttle valve which is connected to said throttle valve shaft and which adjusts the opening and closing of said intake passage by adjusting the position of the throttle valve; and a motor which applies torque to said throttle valve shaft to control the opening and closing of said intake passage, by adjusting the position of said throttle valve; wherein said throttle valve shaft comprises: a valve shaft lever for rotating said throttle valve shaft; an accelerator lever which is operated an accelerator pedal; a floating lever which is positioned between said valve shaft lever and said accelerator lever and which transmits torque to said valve shaft lever to open said throttle valve; a valve returning spring which applies torque to said throttle valve shaft causing said throttle valve to close; an accelerator lever returning spring which applies torque to said accelerator lever causing said throttle valve to close; a motor returning spring which applies torque to said motor causing said throttle valve to close; and a coupler spring which pulls said accelerator lever and said floating lever toward each other, wherein torque generated by the initial deformation of said coupler spring so as to pull said accelerator lever and said floating lever toward each other is greater than the sum of the torques which said valve returning spring and said motor returning spring generate when said throttle valve is fully open.
Claim 12
Dependent Claim
251 words
A throttle actuator comprising: a body which forms an intake passage; a throttle valve shaft supported by said body; a throttle valve which is connected to said throttle valve shaft and which adjusts the opening and closing of said intake passage by adjusting the position of the throttle valve; and a motor which applies torque to said throttle valve shaft to control the opening and closing of said intake passage, by adjusting the position of said throttle valve; wherein said throttle valve shaft comprises: a valve shaft lever for rotating said throttle valve shaft; an accelerator lever which is operated an accelerator pedal; a floating lever which is positioned between said valve shaft lever and said accelerator lever and which transmits torque to said valve shaft lever to open said throttle valve; a valve returning spring which applies torque to said throttle valve shaft causing said throttle valve to close; an accelerator lever returning spring which applies torque to said accelerator lever causing said throttle valve to close; a motor returning spring which applies torque to said motor causing said throttle valve to close; and a coupler spring which pulls said accelerator lever and said floating lever toward each other, wherein torque generated by the initial deformation of said coupler spring so as to pull said accelerator lever and said floating lever toward each other is greater than the sum of the torques which said valve returning spring and said motor returning spring generate when said throttle valve is fully open.
Claim 13
Dependent Claim
206 words
A throttle actuator comprising: a body which forms an intake passage; a throttle valve shaft supported by said body; a throttle valve which is connected to said throttle valve shaft and which adjusts the opening and closing of said intake passage; an electronically controlled motor for adjusting the position of said throttle valve to open and close said intake passage in accordance with a throttle operation which is performed by an accelerator pedal; and an electromagnetic clutch which is provided on said throttle valve shaft and which operates the torque transmission from said motor to said throttle valve shaft, wherein said electromagnetic clutch is disengaged when it is determined that a failure occurs in said electronically controlled motor, wherein said throttle valve shaft comprises: a valve shaft lever for rotating said throttle valve shaft; an accelerator lever which is operated by said accelerator pedal; a floating lever which is positioned between said valve shaft lever and said accelerator lever and which transmits torque to said valve shaft lever to open said throttle valve; a valve returning spring which applies torque to said throttle valve shaft to close said throttle valve; and a coupler spring which pulls said accelerator lever and said floating lever toward each other.
Claim 14
Dependent Claim
206 words
A throttle actuator comprising: a body which forms an intake passage; a throttle valve shaft supported by said body; a throttle valve which is connected to said throttle valve shaft and which adjusts the opening and closing of said intake passage; an electronically controlled motor for adjusting the position of said throttle valve to open and close said intake passage in accordance with a throttle operation which is performed by an accelerator pedal; and an electromagnetic clutch which is provided on said throttle valve shaft and which operates the torque transmission from said motor to said throttle valve shaft, wherein said electromagnetic clutch is disengaged when it is determined that a failure occurs in said electronically controlled motor, wherein said throttle valve shaft comprises: a valve shaft lever for rotating said throttle valve shaft; an accelerator lever which is operated by said accelerator pedal; a floating lever which is positioned between said valve shaft lever and said accelerator lever and which transmits torque to said valve shaft lever to open said throttle valve; a valve returning spring which applies torque to said throttle valve shaft to close said throttle valve; and a coupler spring which pulls said accelerator lever and said floating lever toward each other.
Claim 15
Dependent Claim
33 words
A throttle actuator according to claim 8, further comprising indicating means which communicates, to the driver, a failure message when it is determined that a failure has occurred in said electronically controlled motor.
Claim 16
Dependent Claim
24 words
A throttle actuator according to claim 8, further comprising a motor returning spring which applies torque to said motor to close said throttle valve.
References Cited (Backward Citations)
US4548176A
Cited
US4776563A
Cited
US4848505A
Cited
US4892071A
Cited
US4895343A
Cited
US5002032A
Cited
US4961355A
Cited
US5016589A
Cited
US5022369A
Cited
US5018496A
Cited
US5048485A
Cited
US5035218A
Cited
US5113822A
Cited
US5065722A
Cited
US5107811A
Cited
US5074266A
Cited
US5040508A
Cited
US5131362A
Cited
US5131364A
Cited
US5121727A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-11-29 | 1997-05-31 | 1997-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-11-29 | 2001-05-31 | 2001-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-11-29 | 2005-05-31 | 2005-11-30 | $7700.00 | Window Closed / Lapsed |