EP0482262A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Automatic mechanical transmission start control system
Assignee: Eaton Corp
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Filing: 1990-12-06
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Granted: —
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Expires: 2010-12-06
Abstract
Abstract Preferred embodiments (28b, 28c, 29d, 28e and 28f) of a mechanical transmission start control system are provided which employ a central processing unit (10) operative to process signals indicative of throttle foot pedal position (26); engine speed (20); transmission input speed (14); and transmission output speed (16), and to control either or both the degree of clutch or friction coupling and brake engagement and adjustment to engine fuel in a manner predetermined to provide smooth start-up when vehicle speed is less than a predetermined value "K". <IMAGE>
Inventors
- 👤 Eugene Ralph Braun
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 19:26
CPC Classifications
B; B60; B60W; B60W10/00; B60W10/04; B60W10/06; B60W10/18; B60W30/00; B60W30/18; B60W30/18009; B60W30/18027; B60W30/18063; B60W2510/00; B60W2510/06; B60W2510/0604; B60W2510/10; B60W2510/1005; B60W2710/00; B60W2710/02; B60W2710/021; B60W2710/022; B60W2710/06; B60W2710/0644; B60W2710/18
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
260 words
An automatic mechanical transmission start control system (28c) for vehicles having a throttle controlled engine, said transmission having a plurality of gear ratio combinations selectively engageable between a transmission output shaft and a transmission input shaft operatively connected to the engine by means of a selectively engageable and disengageable friction coupling, said system including an automatic friction coupling actuating member, an automatic vehicle brake actuating member, an operator positional change gear selector member, including a neutral position and positions in which said gear ratio combinations are selectively engaged, and an information processing unit having means for receiving a plurality of signals including: (1) an input signal indicative of the position of said throttle control member or of the amount of fuel supplied to the engine; (2) an input signal indicative of vehicle speed; (3) an input signal indicating when the transmission is in neutral, said processing unit including means for processing said input signals and providing an output signal therefrom such that, when the vehicle speed signal is less than a predetermined value (30c) , said start control system (28c) is operative such that, (i) when the transmission is in neutral (30c) and the throttle is at idle (32c) the output signal is effective to instruct the coupling actuating member to cause the friction coupling to assume a disengaged condition (36c) and (ii) when the transmission is not in neutral and the throttle is at idle (32c) the output signal is effective to instruct the brake actuating member to cause the brakes to assume a predetermined partially engaged condition (38).
Claim 2
Dependent Claim
69 words
The control system of claim 1 such that, when the throttle is at idle (32e) and the transmission is not in neutral (34e), the output signal is further effective to instruct the brake actuating member to apply the brakes lightly (38e) and to instruct the friction coupling actuating member to cause the friction member to assume an engaged condition operative to decrease the engine speed a predetermined amount (64e).
Claim 3
Dependent Claim
28 words
The control system of claim 2 wherein the output signal is further effective to instruct the friction coupling actuating member to cause the friction coupling to stop engagement.
Claim 4
Dependent Claim
35 words
The control system of claim 3 wherein the output signal is further effective to instruct the throttle control member to adjust the fuel as necessary to hold the engine at a predetermined idle speed (42e).
Claim 5
Dependent Claim
41 words
The control system of claims 2,3, or 4 further operative such that, when the throttle is not at idle, the output signal is effective to instruct the brake actuating member to cause the brakes to disengage at a predetermined rate (46e).
Claim 6
Dependent Claim
32 words
The control system of claim 5 wherein the output signal is further effective to instruct the friction coupling actuating member to cause the friction coupling to assume a fully engaged condition (48e).
Claim 7
Dependent Claim
311 words
An automatic mechanical transmission start control system (28b) for vehicles having a throttle controlled engine, said transmission having a plurality of gear ratio combinations selectively engageable between a transmission output shaft and a transmission input shaft operatively connected to the engine by means of a selectively engageable and disengageable friction coupling actuating member, an automatic vehicle brake actuating member, an operator positional change gear selector member, including a neutral position and positions in which said gear ratio combinations are selectively engaged, and an information processing unit having means for receiving a plurality of signals including: (1) an input signal indicative of the position of said throttle control member or of the amount of fuel supplied to the engine; (2) an input signal indicative of vehicle speed; (3) an input signal indicating when the transmission is in neutral, said processing unit including means for processing said input signals and providing an output signal (30b) therefrom such that, when the vehicle speed signal is less than a predetermined value (30b), said start control system is operative such that, (i) when the transmission is in neutral (34b) and the throttle is at idle (32b) the output signal is effective to instruct the coupling actuating member to cause a friction coupling to assume a disengaged condition (34b) and (ii) when the transmission is not in neutral (34b) and the throttle is at idle (32b) and the brakes are in an engaged condition (56b), the output signal is effective to instruct the brake actuating member to cause the brakes to assume a predetermined partially engaged condition (58b) and (iii) when the transmission is not in neutral and the throttle is at idle and the brakes are in a disengaged condition (56b) the output signal is effective to instruct the friction coupling actuating member to cause the friction coupling to assume a predetermined partially engaged condition (40b).
Claim 8
Dependent Claim
60 words
The control system of claim 7 such that, when the throttle is at idle and the transmission is not in neutral and the brakes are in either the engaged or disengaged condition, the output signal is further effective to instruct the throttle control member to adjust the fuel as necessary to hold the engine at a predetermined idle speed (42b).
Claim 9
Dependent Claim
36 words
The control system of claim 8 wherein the output signal is further effective to instruct the friction coupling actuating member to cause the friction coupling to stop engagement at a predetermined decrease in engine speed (50b).
Claim 10
Dependent Claim
48 words
The control system of claim 8 or 9 such that, when the throttle is not at idle (32b) and the transmission is not in neutral (34b), the output signal is effective to instruct the brake actuating member to cause the brakes to disengage at a predetermined rate (46b).
Claim 11
Dependent Claim
32 words
The control system of claim 10 wherein the output signal is further effective to instruct the friction coupling actuating member to cause the friction coupling to assume a fully engaged condition (48b).
Claim 12
Dependent Claim
260 words
An automatic mechanical transmission start control system (28f)for vehicles having a throttle controlled engine, said transmission having a plurality of gear ratio combinations selectively engageable between a transmission output shaft and a transmission input shaft operatively connected to the engine by means of a selectively engageable and disengageable friction coupling actuating member, an automatic vehicle brake actuating member, an operator positional change gear selector member, including a neutral position and positions in which said gear ratio combinations are selectively engaged, and an information processing unit having means for receiving a plurality of signals including: (1) an input signal indicative of the position of said throttle control member or of the amount of fuel supplied to the engine; (2) an input signal indicative of vehicle speed; (3) an input signal indicating when the transmission is in neutral, said processing unit including means for processing said input signals and providing an output signal therefrom such that, when the vehicle speed signal is less than a predetermined value, said start control system is operative such that, (i) when the transmission (30f) is in neutral (30f) and the throttle is at idle (32f) the output signal is effective to instruct the coupling actuating member to cause a friction coupling to assume a disengaged condition (26f) and (ii) when the transmission is not in neutral (34f) and the throttle is at idle (32f) and the brakes are in an engaged condition (56f), the output signal is effective to instruct the brake actuating member to cause the brakes to assume a predetermined partially engaged condition (58f).
Claim 13
Dependent Claim
51 words
The control system of claim 12 such that, when the throttle is not at idle (32f) and the transmission is not in an engaged condition (44f), the output signal is effective to instruct the friction coupling actuating member to cause the friction coupling to assume a predetermined partially engaged condition (52f).
Claim 14
Dependent Claim
34 words
The control system of claim 13 wherein the output signal is further effective to instruct the throttle control member to adjust fuel as necessary to hold the engine at a predetermined idle speed (42f).
Claim 15
Dependent Claim
33 words
The control system of claim 14 wherein the output signal is further effective to instruct the throttle member to increase the amount of fuel supplied to the engine by a predetermined amount (62f).
Claim 16
Dependent Claim
31 words
The control system of claim 15 wherein the output signal is further effective to instruct the friction coupling actuating member to cause the friction coupling to assume a disengaged condition (60f).
Claim 17
Dependent Claim
30 words
The control system of claim 16 wherein the output signal is further effective to instruct the brake actuating member to cause the brakes to disengage at a predetermined rate (46f).
Claim 18
Dependent Claim
32 words
The control system of claim 17 wherein the output signal is further effective to instruct the friction coupling actuating member to cause the friction coupling to assume a fully engaged condition (48f).
Claim 19
Dependent Claim
62 words
The control system of claim 12 such that, when the throttle is at idle (32c) and the transmission is not in neutral (44c) and the brakes are in either the engaged or disengaged condition, the output signal is effective to instruct the friction coupling actuating member to cause the friction member to maintain an engaged condition (52c) until the engine speed decreases.
Claim 20
Dependent Claim
34 words
The control system of claim 16 wherein the output signal is further effective to instruct the throttle control member to adjust fuel as necessary to hold the engine at a predetermined idle speed (42d).
Claim 21
Dependent Claim
29 words
The control system of claim 20 wherein the output signal is further effective to instruct the friction coupling actuating member to cause the friction coupling to stop engagement (60d).
Claim 22
Dependent Claim
45 words
The control system of claim 19, 20, or 21 such that, when the throttle is not at idle and the transmission is not in neutral, the output signal is effective to instruct the brake actuating member to disengage the brakes at a predetermined rate (46d).
Claim 23
Dependent Claim
32 words
The control system of claim 22 wherein the output signal is further effective to instruct the friction coupling actuating member to cause the friction coupling to assume a fully engaged condition (48d).
References Cited (Backward Citations)
No citation records indexed.
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