Patent EP0298232A2 successfully refreshed from Google Patents.
EP0298232A2
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EP
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Driving wheel slip control system for vehicles
Assignee: Honda Motor Co Ltd
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Filing: 1988-05-20
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Granted: —
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Expires: 2008-05-20
Abstract
Abstract A driving wheel slip control system for a vehicle detects an excessive slip state of at least one of the driving wheels of the vehicle wherein the slip of the driving wheel has a magnitude greater than a predetermined magnitude, and reduces engine output when the excessive slip state is detected, by repeating alternate fuel cut and fuel supply such that fuel supply is stopped for a first predetermined time period, and then effected for a second predetermined time period. During the second predetermined time period the engine is supplied with an amount of fuel smaller than one required for an operating condition of the engine in the excessive slip state. The first and second time period ratio and the fuel amount may depend upon engine parameters e.g. engine rotational speed and/or pressure in intake passage, or slip state. If the excessive slip state has a greater variation in magnitude than a certain value, fuel supply is continuously effected for a third predetermined time period longer than the first predetermined time period or all the time during the excessive slip state. When the driving wheel has left the excessive slip state, engine output is reduced below a value required for an operating condition of the engine.
Inventors
- 👤 Tetsuya Ooono
- 👤 Nobuyuki Narisawa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 03:31
CPC Classifications
B; B60; B60K; B60K28/00; B60K28/10; B60K28/16
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
174 words
In a system for controlling the slip of driving wheels of a vehicle equipped with an engine, including fuel supply means for supplying fuel to said engine, excessive slip detecting means for detecting an excessive slip state of at least one of said driving wheels of said vehicle wherein the slip of said at least one driving wheel has a magnitude greater than a predetermined magnitude, and engine output reducing means associated with said fuel supply means and said excessive slip detecting means, for reducing output from said engine when said excessive slip state is detected by said excessive slip detecting means, the improvement wherein said engine output reducing means comprises means for causing said fuel supply means to repeat alternate fuel cut and fuel supply in a manner such that fuel supply is stopped for a first predetermined period of time, and fuel supply is effected for a second predetermined period of time following said first predetermined period of time, when said excessive slip state is detected by said excessive slip detecting means.
Claim 2
Dependent Claim
174 words
In a system for controlling the slip of driving wheels of a vehicle equipped with an engine, including fuel supply means for supplying fuel to said engine, excessive slip detecting means for detecting an excessive slip state of at least one of said driving wheels of said vehicle wherein the slip of said at least one driving wheel has a magnitude greater than a predetermined magnitude, and engine output reducing means associated with said fuel supply means and said excessive slip detecting means, for reducing output from said engine when said excessive slip state is detected by said excessive slip detecting means, the improvement wherein said engine output reducing means comprises means for causing said fuel supply means to repeat alternate fuel cut and fuel supply in a manner such that fuel supply is stopped for a first predetermined period of time, and fuel supply is effected for a second predetermined period of time following said first predetermined period of time, when said excessive slip state is detected by said excessive slip detecting means.
Claim 3
Dependent Claim
62 words
A system as claimed in claim 1, wherein said engine output reducing means causes said fuel supply means to supply said engine with an amount of fuel smaller than an amount of fuel required for an operating condition of said engine assumed when said at least one driving wheel is in said excessive slip state, for said second predetermined period of time.
Claim 4
Dependent Claim
54 words
A system as claimed in claim 2, wherein said amount of fuel supplied to said engine for said second predetermined period of time is set by a fuel decremental value determined in dependence on an operating condition of said engine assumed when said at least one driving wheel is in said excessive slip state.
Claim 5
Dependent Claim
34 words
A system as claimed in claim 3, wherein said fuel decremental value is dependent upon at least one of the rotational speed of said engine and pressure in an intake passage of said engine.
Claim 6
Dependent Claim
51 words
A system as claimed in claim 1, wherein the ratio between said first predetermined period of time and said second predetermined period of time is set to a value dependent upon an operating condition of said engine assumed when said at least one driving wheel is in said excessive slip state.
Claim 7
Dependent Claim
50 words
A system as claimed in claim 5, wherein the ratio between said first predetermined period of time and said second predetermined period of time is set to a value dependent upon at least one of the rotational speed of said engine and pressure in an intake passage of said engine.
Claim 8
Dependent Claim
55 words
A system as claimed in claim 1, wherein the ratio between said first predetermined period of time and said second predetermined period of time is set to a value dependent upon a slip state of said at least one driving wheel assumed when said at least one driving wheel is in said excessive slip state.
Claim 9
Dependent Claim
49 words
A system as claimed in claim 7, wherein the ratio between said first predetermined period of time and said second predetermined period of time is set to a value dependent upon at least one of slip rate of said at least one driving wheel and slip rate variation thereof.
Claim 10
Dependent Claim
86 words
A system as claimed in claim 1, wherein said engine output reducing means causes said fuel supply means to repeat alternate fuel cut and fuel supply in said manner when said at least one driving wheel has shifted to said excessive slip state after staying in a slip state wherein the slip of said at least one driving wheel has a magnitude smaller than a second predetermined magnitude which is smaller than said predetermined magnitude of slip, for less than a third predetermined period of time.
Claim 11
Dependent Claim
50 words
A system as claimed in claim 1, wherein said engine output reducing means includes ignition timing retarding means for retarding ignition timing of said engine which is determined by at least one operating parameter of said engine when said at least one driving wheel is in said excessive slip state.
Claim 12
Dependent Claim
225 words
In a system for controlling the slip of driving wheels of a vehicle equipped with an engine, including fuel supply means for supplying fuel to said engine, excessive slip detecting means for detecting an excessive slip state of at least one of said driving wheels of said vehicle wherein the slip of said at least one driving wheel has a magnitude greater than a predetermined magnitude, and engine output reducing means associated with said fuel supply means and said excessive slip detecting means, for reducing output from said engine when said excessive slip state is detected by said excessive slip detecting means, the improvement wherein said engine output reducing means comprises: first means for causing said fuel supply means to repeat alternate fuel cut and fuel supply in a manner such that fuel supply is stopped for a first predetermined period of time, and fuel supply is effected for a second predetermined period of time following said first predetermined period of time, when said excessive slip detecting means detects a first one of said excessive slip state, and a second means for causing said fuel supply means to continuously effect fuel cut to said engine for a third predetermined period of time longer than said first predetermined period of time when said excessive slip detecting means detects a second one of said excessive slip state.
Claim 13
Dependent Claim
225 words
In a system for controlling the slip of driving wheels of a vehicle equipped with an engine, including fuel supply means for supplying fuel to said engine, excessive slip detecting means for detecting an excessive slip state of at least one of said driving wheels of said vehicle wherein the slip of said at least one driving wheel has a magnitude greater than a predetermined magnitude, and engine output reducing means associated with said fuel supply means and said excessive slip detecting means, for reducing output from said engine when said excessive slip state is detected by said excessive slip detecting means, the improvement wherein said engine output reducing means comprises: first means for causing said fuel supply means to repeat alternate fuel cut and fuel supply in a manner such that fuel supply is stopped for a first predetermined period of time, and fuel supply is effected for a second predetermined period of time following said first predetermined period of time, when said excessive slip detecting means detects a first one of said excessive slip state, and a second means for causing said fuel supply means to continuously effect fuel cut to said engine for a third predetermined period of time longer than said first predetermined period of time when said excessive slip detecting means detects a second one of said excessive slip state.
Claim 14
Dependent Claim
107 words
A system as claimed in claim 11, wherein said first one of said excessive slip state is a state to which said at least one driving wheel shifts after staying for less than a fourth predetermined period of time in a smaller slip state wherein the slip of said at least one driving wheel has a magnitude smaller than a second magnitude which is smaller than said first-mentioned predetermined magnitude, and said second one of said excessive slip state is a state to which said at least one driving wheel shifts after staying for more than said fourth predetermined period of time in said smaller slip state.
Claim 15
Dependent Claim
211 words
In a system for controlling the slip of driving wheels of a vehicle equipped with an engine, including fuel supply means for supplying fuel to said engine, excessive slip detecting means for detecting an excessive slip state of at least one of said driving wheels of said vehicle wherein the slip of said at least one driving wheel has a magnitude greater than a predetermined magnitude, and engine output reducing means associated with said fuel supply means and said excessive slip detecting means, for reducing output from said engine when said excessive slip state is detected by said excessive slip detecting means, the improvement wherein said engine output reducing means comprises: first means for causing said fuel supply means to repeat alternate fuel cut and fuel supply in a manner such that fuel supply is stopped for a first predetermined period of time, and fuel supply is effected for a second predetermined period of time following said first predetermined period of time, when said excessive slip detecting means detects a first one of said excessive slip state, and second means for causing said fuel supply means to continuously effect fuel cut to said engine as long as said excessive slip detecting means detects a second one of said excessive slip state.
Claim 16
Dependent Claim
211 words
In a system for controlling the slip of driving wheels of a vehicle equipped with an engine, including fuel supply means for supplying fuel to said engine, excessive slip detecting means for detecting an excessive slip state of at least one of said driving wheels of said vehicle wherein the slip of said at least one driving wheel has a magnitude greater than a predetermined magnitude, and engine output reducing means associated with said fuel supply means and said excessive slip detecting means, for reducing output from said engine when said excessive slip state is detected by said excessive slip detecting means, the improvement wherein said engine output reducing means comprises: first means for causing said fuel supply means to repeat alternate fuel cut and fuel supply in a manner such that fuel supply is stopped for a first predetermined period of time, and fuel supply is effected for a second predetermined period of time following said first predetermined period of time, when said excessive slip detecting means detects a first one of said excessive slip state, and second means for causing said fuel supply means to continuously effect fuel cut to said engine as long as said excessive slip detecting means detects a second one of said excessive slip state.
Claim 17
Dependent Claim
107 words
A system as claimed in claim 13, wherein said first one of said excessive slip state is a state to which said at least one driving wheel shifts after staying for less than a third predetermined period of time in a smaller slip state wherein the slip of said at least one driving wheel has a magnitude smaller than a second magnitude which is smaller than said first-mentioned predetermined magnitude, and said second one of said excessive slip state is a state to which said at least one driving wheel shifts after staying for more than said third predetermined period of time in said smaller slip state.
Claim 18
Dependent Claim
79 words
A system as claimed in claim 1, further comprising second engine output reducing means associated with said excessive slip detecting means, and operable when said excessive slip detecting means detects that said at least one driving wheel has left said excessive slip state, for reducing output from said engine to a value smaller than a value required for an operating condition of said engine assumed immediately after said at least one driving wheel has left said excessive slip state.
Claim 19
Dependent Claim
26 words
A system as claimed in claim 15, wherein said second engine output reducing means comprises mixture leaning means which leans a mixture supplied to said engine.
Claim 20
Dependent Claim
26 words
A system as claimed in claim 15, wherein said second engine output reducing means comprises ignition timing retarding means which retards ignition timing in said engine.
Claim 21
Independent Claim
46 words
A system as claimed in any of claims 15 - 17, wherein said second engine output reducing means operates when the rotational speed of said engine is higher than a predetermined value immediately after said at least one driving wheel has left said excessive slip state.
Claim 22
Independent Claim
39 words
A system as claimed in any of claims 15 - 17, wherein said second engine output reducing means operates for a third predetermined period of time after said at least one driving wheel has left said excessive slip state.
Claim 23
Dependent Claim
173 words
In a system for controlling the slip of driving wheels of a vehicle equipped with an engine, including fuel supply means for supplying fuel to said engine, excessive slip detecting means for detecting an excessive slip state of at least one of said driving wheels of said vehicle wherein the slip of said at least one driving wheel has a magnitude greater than a predetermined magnitude, and engine output reducing means associated with said fuel supply means and said excessive slip detecting means, for reducing output from said engine when said excessive slip state is detected by said excessive slip detecting means, the improvement comprising: second engine output reducing means associated with said excessive slip detecting means, and operable when said excessive slip state detects that said at least one driving wheel has left said excessive slip state, for reducing output from said engine to a value smaller than a value required for an operating condition of said engine immediately after said at least one driving wheel has left said excessive slip state.
Claim 24
Dependent Claim
173 words
In a system for controlling the slip of driving wheels of a vehicle equipped with an engine, including fuel supply means for supplying fuel to said engine, excessive slip detecting means for detecting an excessive slip state of at least one of said driving wheels of said vehicle wherein the slip of said at least one driving wheel has a magnitude greater than a predetermined magnitude, and engine output reducing means associated with said fuel supply means and said excessive slip detecting means, for reducing output from said engine when said excessive slip state is detected by said excessive slip detecting means, the improvement comprising: second engine output reducing means associated with said excessive slip detecting means, and operable when said excessive slip state detects that said at least one driving wheel has left said excessive slip state, for reducing output from said engine to a value smaller than a value required for an operating condition of said engine immediately after said at least one driving wheel has left said excessive slip state.
Claim 25
Dependent Claim
26 words
A system as claimed in claim 20, wherein said second engine output reducing means comprises mixture leaning means which leans a mixture supplied to said engine.
Claim 26
Dependent Claim
26 words
A system as claimed in claim 20, wherein said second engine output reducing means comprises ignition timing retarding means which retards ignition timing in said engine.
Claim 27
Independent Claim
46 words
A system as claimed in any of claims 20 - 22, wherein said second engine output reducing means operates when the rotational speed of said engine is higher than a predetermined value immediately after said at least one driving wheel has left said excessive slip state.
Claim 28
Independent Claim
38 words
A system as claimed in any of claims 20 - 22, wherein said second engine output reducing means operates for a predetermined period of time after said at least one driving wheel has left said excessive slip state.
References Cited (Backward Citations)
No citation records indexed.
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