Patent US6459166B2 successfully refreshed from Google Patents.
US6459166B2
Expired / Lapsed
US
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Warm-up control device of hybrid electric vehicle
Assignee: Mitsubishi Fuso Truck and Bus Corp
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Filing: 2001-02-16
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Granted: 2002-10-01
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Expires: 2021-02-16
Abstract
Abstract The invention provides a warm-up control device of a hybrid electric vehicle, which warms up an engine for generator while extending the life of the engine and improves the quietness. If an engine temperature is not greater than a set temperature after the start of the engine for generator, the warm-up control device controls a load of the generator and controls an engine output in accordance with the load of the generator so as to maintain an engine revolution speed at a predetermined low revolution speed.
Inventors
- 👤 Takashi Yanase
- 👤 Makoto Ogata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:10
CPC Classifications
B; B60; B60W; B60W20/00; B60K; B60K6/00; B60K6/20; B60K6/42; B60K6/46; B60L; B60L50/00; B60L50/50; B60L50/60; B60L50/61; B60L50/62; B60W10/00; B60W10/04; B60W10/06; B60W10/08; F; F02; F02D; F02D41/00; F02D41/02; F02D41/04; F02D41/06; F02D41/068; F02D41/08; F02D41/083; B60L2220/00; B60L2220/10; B60L2220/12; B60L2220/14; B60L2240/00; B60L2240/40; B60L2240/44; B60L2240/441; B60L2240/445; B60L2270/00; B60L2270/10; B60L2270/14; B60L2270/145; B60W2510/00; B60W2510/06; B60W2510/0676; B60W2710/00; B60W2710/06; B60W2710/0644; F02D41/021; F02D41/0235; F02D41/024; F02D2041/026; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/62; Y02T10/70; Y02T10/7072; Y10; Y10S; Y10S903/00; Y10S903/902; Y10S903/903
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
92 words
A hybrid electric vehicle comprising: a generator being rotated by a driving force of an engine to generate power and supply the power to a battery or a motor; a temperature sensing device for sensing a temperature of said engine; and a warm-up control device for controlling a load of said generator and an output of said engine so as to maintain a revolution speed of said engine at a predetermined revolution speed, if the temperature of said engine sensed by said temperature sensing device is not greater than a set temperature.
Claim 2
Dependent Claim
92 words
A hybrid electric vehicle comprising: a generator being rotated by a driving force of an engine to generate power and supply the power to a battery or a motor; a temperature sensing device for sensing a temperature of said engine; and a warm-up control device for controlling a load of said generator and an output of said engine so as to maintain a revolution speed of said engine at a predetermined revolution speed, if the temperature of said engine sensed by said temperature sensing device is not greater than a set temperature.
Claim 3
Dependent Claim
30 words
A hybrid electric vehicle according to claim 1 , wherein: said warm-up control device changes the load of said generator according to the temperature sensed by said temperature sensing device.
Claim 4
Dependent Claim
31 words
A hybrid electric vehicle according to claim 1 , wherein: said warm-up control device increases the load of said generator as the temperature sensed by said temperature sensing device is lowered.
Claim 5
Dependent Claim
63 words
A hybrid electric vehicle according to claim 1 , wherein: said warm-up control device has a first set load and a second set load higher than said first set load in order to change the load of said generator, and determines which of said set loads is to be applied to said generator according to the temperature sensed by said temperature sensing device.
Claim 6
Dependent Claim
78 words
A hybrid electric vehicle according to claim 4 , wherein: if the temperature sensed by said temperature sensing device is higher than a first predetermined temperature lower than said set temperature, said warm-up control device changes the load of said generator to said first set load; and if the temperature sensed by said temperature sensing device is lower than said first predetermined temperature, said warm-up control device changes the load of said generator to said second set load.
Claim 7
Dependent Claim
46 words
A hybrid electric vehicle according to claim 1 , wherein: said warm-up control device finishes controlling the load of said generator and the output of said engine when the temperature sensed by said temperature sensing device exceeds a second preset temperature higher than said set temperature.
Claim 8
Dependent Claim
71 words
A hybrid electric vehicle comprising: a generator being rotated by a driving force of an engine to generate power and supply the power to a battery or a motor; and a warm-up control device for increasing a load of said generator and controlling an output of said engine so as to maintain a revolution speed of said engine at a predetermined revolution speed after starting said engine in a cold state.
Claim 9
Dependent Claim
71 words
A hybrid electric vehicle comprising: a generator being rotated by a driving force of an engine to generate power and supply the power to a battery or a motor; and a warm-up control device for increasing a load of said generator and controlling an output of said engine so as to maintain a revolution speed of said engine at a predetermined revolution speed after starting said engine in a cold state.
Claim 10
Independent Claim
91 words
A method for warming up an engine from a cold state in a hybrid drive system wherein the engine drives an electric generator, comprising the steps of: sensing a condition indicative of said engine being in a cold state; starting said engine and bringing the revolution speed of said engine to a predetermined minimum level; placing a predetermined load on said generator; and maintaining said predetermined minimum level of revolution speed on said engine against said predetermined load on said generator to reduce time and engine noise associated with engine warm-up.
Claim 11
Independent Claim
91 words
A method for warming up an engine from a cold state in a hybrid drive system wherein the engine drives an electric generator, comprising the steps of: sensing a condition indicative of said engine being in a cold state; starting said engine and bringing the revolution speed of said engine to a predetermined minimum level; placing a predetermined load on said generator; and maintaining said predetermined minimum level of revolution speed on said engine against said predetermined load on said generator to reduce time and engine noise associated with engine warm-up.
Claim 12
Dependent Claim
39 words
The method of claim 8 , including the further steps of sensing a second condition indicative of a warmed-up state of said engine; and removing the constraints placed upon said engine revolution speed and generator load during engine warm-up.
Claim 13
Dependent Claim
38 words
The method of claim 8 , wherein said engine has a plurality of cold states; and said generator has a like plurality of loads selectively associated with a respective cold state to optimize the warm-up of said engine.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2005-09-30 | 2006-04-01 | 2006-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-09-30 | 2010-04-01 | 2010-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-09-30 | 2014-04-01 | 2014-10-01 | $7700.00 | Window Closed / Lapsed |