EP0057322A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Clutch control means
Assignee: Whitnash PLC
•
Filing: 1981-12-18
•
Granted: —
•
Expires: 2001-12-18
Abstract
Abstract A vehicle transmission clutch control including an electronic logic control (1) which controls the transmission gear selection, a clutch position signal generator (16) responsive to vehicule operating parameters to produce a command signal (Sc) which operates a clutch control (22, 24, 25, 26, 27, 28, 29) to govern the engagement of the clutch. A clutch disengagement control (15) receives a gear change signal (Sd) from the logic control and produces an output signal (Se) that can override the command signal (Sc) to cause the control system to disengage the clutch (21). The output signal (Se) is caused to vary during a gear change and thereby alters the command signal (Sc) and cause the clutch engagement to vary over the gear change period.
Inventors
- 👤 Harry Mellows Windsor
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 22:27
CPC Classifications
B; B60; B60W; B60W30/00; B60W30/18; B60W10/00; B60W10/02; B60W10/10; B60W30/1819
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
128 words
A vehicle transmission clutch control including an electronic logic control (11) which is responsive to transmission operating parameters to control selection of the appropriate gear ratio, a clutch position signal generator (16) responsive to vehicle operating parameters and producing a command signal (Sc)which operates a clutch cuntrol (22,24,25,26,27,28,29) which governs the state of engagement of the clutch(21), characterised in that disengagement a clutch / control (15)responsive to a gear change signal(Sd) from the logic control (11), produces an output signal(Se)capable of overriding the command signal(Sc) and cause the clutch control to disengage the clutch, and said output signal(Se) is caused to vary during the gear change period and thereby alter the command signal (Sc) and cause the state of engagement of the clutch to vary over said period.
Claim 2
Dependent Claim
128 words
A vehicle transmission clutch control including an electronic logic control (11) which is responsive to transmission operating parameters to control selection of the appropriate gear ratio, a clutch position signal generator (16) responsive to vehicle operating parameters and producing a command signal (Sc)which operates a clutch cuntrol (22,24,25,26,27,28,29) which governs the state of engagement of the clutch(21), characterised in that disengagement a clutch / control (15)responsive to a gear change signal(Sd) from the logic control (11), produces an output signal(Se)capable of overriding the command signal(Sc) and cause the clutch control to disengage the clutch, and said output signal(Se) is caused to vary during the gear change period and thereby alter the command signal (Sc) and cause the state of engagement of the clutch to vary over said period.
Claim 3
Dependent Claim
84 words
A control as claimed in Claim 1, characterised in that the disengagement control includes an integrator comprising an amplifier (30) which is connected to the logic control (11) via an inverting input, and has its output(Se)connected to the command signal(Sc),and a capacitor (31) connected across the amplifier output and said input, and the gear change signal(Sd)causes a change in the polarity of the amplifier input thereby causing a change in the charge in the capacitor (31) and a subsequent change in the output signal(Se).
Claim 4
Dependent Claim
52 words
A control as claimed in Claim 2, characterised in that the rate of change of charge in the capacitor (31) is changed by altering the total resistance of the capacitor charging circuit, by switching a resistance in or out of said circuit once a predetermined change in amplifier output has taken place.
Claim 5
Dependent Claim
38 words
A control as claimed in Claim 3, characterised in that the resistance is switched in and out of the capacitor charging circuit by a transistor(T 1 ), sensitive to the potential difference between the amplifier input and outputs.
Claim 6
Dependent Claim
59 words
A control as claimed in Claim 3 or Claim 4, characterised in that when the gear change signal (Se) is effective the resistance of the capacitor charging circuit is determined by a first resistor (r'), and when the gear change signal ceases, the resistance of the amplifier is also determined by a second and third resistors (R and r).
Claim 7
Dependent Claim
49 words
A control as claimed in Claim 5, when dependant upon Claim 4, characterised in that the transistor (T 1 ) switches one of the second and third resistors out of the capacitor charging circuit when the gear change signal (Sd) ceases, and the predetermined potential difference has been reached.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.