Patent US1113634A successfully refreshed from Google Patents.
Patent US5038883A successfully refreshed from Google Patents.
US5038883A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Traction control device for a vehicle
Assignee: Toyota Motor Corp
•
Filing: 1990-03-01
•
Granted: 1991-08-13
•
Expires: 2010-03-01
Abstract
Abstract A traction control device comprising a fuel supply control device for controlling the supply of fuel fed into the engine cylinders. When the temperature of the engine is high, if the speed difference between the rotating speed of the free running wheel and the rotating speed of the driven wheel exceeds a predetermined value, the supply of fuel fed into some of the cylinders or all of the cylinders is stopped. Conversely, when the temperature of the engine is low, even if the speed difference exceeds the predetermined value, the feeding of fuel to all of the cylinders is continued.
Inventors
- 👤 Naoto Kushi
- 👤 Toshio Takaoka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:46
CPC Classifications
B; B60; B60K; B60K28/00; B60K28/10; B60K28/16; F; F02; F02D; F02D41/00; F02D41/008; F02D41/0087
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
195 words
A traction control device of a vehicle having a free running wheel and a driven wheel driven by an engine having a plurality of cylinders, a fuel supply device for the cylinders and an ignition device for the cylinders, said traction control device comprising: means for detecting the rotating speed of the free running wheel; means for detecting the rotating speed of the driven wheel; speed difference calculating means for calculating a speed difference between the rotating speed of the free running wheel and the rotating speed of the driven wheel; temperature detecting means for detecting an internal temperature of the engine; and fuel supply control means for controlling the supply of fuel fed into the cylinders in response to said speed difference and said temperature of the engine to stop the supply of fuel fed into at least one cylinder when said speed difference exceeds a predetermined value and when said temperature of the engine is higher than a predetermined temperature and continuing the supply of fuel fed into all of the cylinders when said speed difference exceeds said predetermined value and when said temperature of the engine is lower than said predetermined temperature.
Claim 2
Dependent Claim
195 words
A traction control device of a vehicle having a free running wheel and a driven wheel driven by an engine having a plurality of cylinders, a fuel supply device for the cylinders and an ignition device for the cylinders, said traction control device comprising: means for detecting the rotating speed of the free running wheel; means for detecting the rotating speed of the driven wheel; speed difference calculating means for calculating a speed difference between the rotating speed of the free running wheel and the rotating speed of the driven wheel; temperature detecting means for detecting an internal temperature of the engine; and fuel supply control means for controlling the supply of fuel fed into the cylinders in response to said speed difference and said temperature of the engine to stop the supply of fuel fed into at least one cylinder when said speed difference exceeds a predetermined value and when said temperature of the engine is higher than a predetermined temperature and continuing the supply of fuel fed into all of the cylinders when said speed difference exceeds said predetermined value and when said temperature of the engine is lower than said predetermined temperature.
Claim 3
Dependent Claim
25 words
A traction control device according to claim 1, wherein said fuel supply control means stops the supply of fuel fed into all of the cylinders.
Claim 4
Dependent Claim
47 words
A traction control device according to claim 1, wherein said fuel supply control means controls the number of cylinders in which the supply of fuel is to be stopped in accordance with an overall rate of reduction in the output torque of the engine to be reduced.
Claim 5
Dependent Claim
71 words
A traction control device according to claim 3, wherein said overall rate of reduction in the output torque of the engine is determined by said speed difference and a ratio of an engine speed to the rotating speed of the driven wheel and is increased as said speed difference becomes large, and said overall rate of reduction of the output torque of the engine is increased as said ratio is decreased.
Claim 6
Dependent Claim
81 words
A traction control device according to claim 3, wherein the number of the cylinders in which the supply of fuel is to be stopped is calculated from the following equation NC=INT(KC·ΔR) where NC: number of cylinders in which the supply of fuel is to be stopped. KC: the total number of cylinders. ΔR: said overall rate of reduction of the output torque of the engine. INT: a symbol indicating a function of eliminating the figures of (KC·ΔR) below a decimal point.
Claim 7
Dependent Claim
31 words
A traction control device according to claim 3, further comprising ignition control means for retarding an ignition timing when the supply of fuel fed into at least one cylinder is stopped.
Claim 8
Dependent Claim
50 words
A traction control device according to claim 6, wherein said ignition control means retards the ignition timing by a degree which causes the reduction in a part of said overall rate of reduction of the output torque by the engine, which cannot be reduced by stopping the supply of fuel.
Claim 9
Dependent Claim
73 words
A traction control device according to claim 7, wherein a rate of reduction of the output torque of the engine, which rate is obtained by retarding the ignition timing by a unit degree, is stored in a memory, and a retarding value of the ignition timing is calculated from said part of said overall rate of reduction and said rate of reduction of the output torque of the engine stored in said memory.
Claim 10
Dependent Claim
39 words
A traction control device according to claim 1, further comprising ignition control means for retarding an ignition timing when said speed difference exceeds said predetermined value and when said temperature of the engine is lower than said predetermined temperature.
Claim 11
Dependent Claim
59 words
A traction control device according to claim 9, wherein said ignition control means controls the ignition timing in accordance with an overall rate of reduction of the output torque of the engine to be reduced to increase a retarding value of the ignition timing as said overall rate of reduction of the output torque of the engine is increased.
Claim 12
Dependent Claim
70 words
A traction control device according to claim 10, wherein said overall rate of reduction of the output torque of the engine is determined by said speed difference and a ratio of an engine speed to the rotating speed of the driven wheel and increased as said speed difference becomes large, and said overall rate of reduction of the output torque of the engine is increased as said ratio is decreased.
Claim 13
Dependent Claim
91 words
A traction control device according to claim 10, wherein a rate of reduction of the output torque of the engine, which rate is obtained by retarding the ignition timing by a unit degree, is stored in a memory, and the retarding value of the ignition timing is calculated from the following equation Δθ=ΔR/TCA where Δθ: the retarding value of the ignition timing. ΔR: said overall rate of reduction of the output torque of the engine. TCA: said rate of reduction of the output torque of the engine stored in said memory.
Claim 14
Dependent Claim
49 words
A traction control device according to claim 10, wherein said ignition control means controls the retarding of the ignition timing to maintain the retarding value of the ignition timing at a predetermined maximum retarding value when the retarding value of the ignition timing exceeds said predetermined maximum retarding value.
Claim 15
Dependent Claim
145 words
A traction control device according to claim 1, further comprising ignition control means for controlling an ignition timing in accordance with an overall rate of reduction of the output torque of the engine to be reduced to increase a retarding value of the ignition timing as said overall rate of reduction of the output torque of the engine is increased when said speed difference exceeds said predetermined value and when said temperature of the engine is in the range from said predetermined temperature to a higher predetermined temperature, said fuel supply control means stopping the supply of fuel fed into at least one cylinder only when the output torque of the engine cannot be reduced by a torque corresponding to said overall rate of reduction of the output torque of the engine even if the ignition timing is retarded by a predetermined maximum retarding value.
Claim 16
Dependent Claim
63 words
A traction control device according to claim 14, wherein said fuel supply control means controls the number of cylinders in which the supply of fuel is to be stopped in accordance with a part of said overall ratio of reduction of the output torque of the engine, which part cannot be reduced only by retarding the ignition timing by said maximum retarding value.
Claim 17
Dependent Claim
51 words
A traction control device according to claim 15, wherein said ignition control means retards the ignition timing by a degree which causes the reduction in a part of said overall rate of reduction of the output torque of the engine, which part cannot be reduced by stopping the supply of fuel.
Claim 18
Dependent Claim
30 words
The traction control device according to claim 1 wherein said temperature detection means comprises a coolant temperature sensor for producing a signal proportional to the temperature of the engine's coolant.
References Cited (Backward Citations)
US3938612A
Cited
JPS5330877A
Cited
JPS588436A
Cited
US4432430A
Cited
US4506638A
Cited
US4550704A
Cited
JPS60151160A
Cited
US4792011A
Cited
US4721176A
Cited
US4804058A
Cited
US4860849A
Cited
EP0298232A2
Cited
US4921064A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-08-12 | 1995-02-11 | 1995-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-12 | 1999-02-11 | 1999-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-12 | 2003-02-11 | 2003-08-13 | $7700.00 | Window Closed / Lapsed |