Neutral attainment control system/method for controlling shifting in vehicular automated mechanical transmission systems
First Claim
1. An information processing machine-implemented process for controlling shifting in a vehicular automated mechanical transmission system comprising a fuel-controlled engine (14) having a minimum (0% WOT) and a maximum (100% WOT) magnitude of fueling, a fuel controller (26) for controlling fueling of the engine, a multiple-speed, change-gear transmission (12) having a plurality of selectively engaged forward gear ratios, gear ratio shifts of said transmission comprising a sequence of disengaging a first positive clutch (142A/134A) and then engaging a second positive clutch, both of said positive clutches comprising a first clutch member (134A) having a rotational speed determined by the rotational speed of the engine (ES, IS) and a second clutch member (142A) having a rotational speed determined by vehicle ground speed (OS), a transmission operator (34) for selectively positioning said clutch members to engaged and disengaged positions, a non-positive coupling (16) drivingly interposed between said engine and said transmission, and an information processing machine (42) for receiving a plurality of input signals including an input signal indicative of engine speed and an input signal indicative of engaged and disengaged positions of said clutch members and for processing same according to predetermined logic rules to issue command output signals to a plurality of system actuators including said fuel controller and said transmission operator, said process, upon determining a requirement for disengaging said first positive clutch, comprising:
- (1) sensing for disengagement of said first positive clutch; and
(2) until disengagement of said first positive clutch is sensed,(a) continuously causing said transmission operator to urge said first and second clutch members of said first positive clutch into the disengaged position thereof; and
(b) causing said fuel controller, in sequence, to;
(i) cause engine fueling to equal said minimum value thereof (302);
(ii) cause fueling of said engine to be increased to a first predetermined value and then to be decreased to saidminimum value thereof (304); and
(iii) after a first predetermined period of time, cause fueling of said engine to be increased to a second predetermined value and then decreased to said minimum value thereof (306), said second predetermined value being greater than said first predetermined value.
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Accused Products
Abstract
A robust engine fueling control is provided for assuring neutral attainment in a vehicular automated mechanical transmission system (10) having a manually controlled master clutch (16). Upon sensing a requirement for a shift into transmission neutral, the disengaging jaw clutch members (134A/142A) are constantly urged into a disengaged position, fuel is caused to decrease to idle (302), and then fuel is blipped by increasingly larger amounts (304, 306, 308) until neutral is sensed.
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Citations
26 Claims
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1. An information processing machine-implemented process for controlling shifting in a vehicular automated mechanical transmission system comprising a fuel-controlled engine (14) having a minimum (0% WOT) and a maximum (100% WOT) magnitude of fueling, a fuel controller (26) for controlling fueling of the engine, a multiple-speed, change-gear transmission (12) having a plurality of selectively engaged forward gear ratios, gear ratio shifts of said transmission comprising a sequence of disengaging a first positive clutch (142A/134A) and then engaging a second positive clutch, both of said positive clutches comprising a first clutch member (134A) having a rotational speed determined by the rotational speed of the engine (ES, IS) and a second clutch member (142A) having a rotational speed determined by vehicle ground speed (OS), a transmission operator (34) for selectively positioning said clutch members to engaged and disengaged positions, a non-positive coupling (16) drivingly interposed between said engine and said transmission, and an information processing machine (42) for receiving a plurality of input signals including an input signal indicative of engine speed and an input signal indicative of engaged and disengaged positions of said clutch members and for processing same according to predetermined logic rules to issue command output signals to a plurality of system actuators including said fuel controller and said transmission operator, said process, upon determining a requirement for disengaging said first positive clutch, comprising:
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(1) sensing for disengagement of said first positive clutch; and (2) until disengagement of said first positive clutch is sensed, (a) continuously causing said transmission operator to urge said first and second clutch members of said first positive clutch into the disengaged position thereof; and (b) causing said fuel controller, in sequence, to; (i) cause engine fueling to equal said minimum value thereof (302); (ii) cause fueling of said engine to be increased to a first predetermined value and then to be decreased to said minimum value thereof (304); and (iii) after a first predetermined period of time, cause fueling of said engine to be increased to a second predetermined value and then decreased to said minimum value thereof (306), said second predetermined value being greater than said first predetermined value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for controlling shifting in a vehicular automated mechanical transmission system comprising a fuel-controlled engine (14) having a minimum (0% WOT) and a maximum (100% WOT) magnitude of fueling, a fuel controller (26) for controlling fueling of the engine, a multiple-speed, change-gear transmission (12) having a plurality of selectively engaged forward gear ratios, gear ratio shifts of said transmission comprising a sequence of disengaging a first positive clutch (142A/134A) and then engaging a second positive clutch, both of said positive clutches comprising a first clutch member (134A) having a rotational speed determined by the rotational speed of the engine (ES, IS) and a second clutch member (142A) having a rotational speed determined by vehicle ground speed (OS), a transmission operator (34) for selectively positioning said clutch members to engaged and disengaged positions, a non-positive coupling (16) drivingly interposed between said engine and said transmission, and an information processing machine (42) for receiving a plurality of input signals including an input signal indicative of engine speed and an input signal indicative of engaged and disengaged positions of said clutch members and for processing same according to predetermined logic rules to issue command output signals to a plurality of system actuators including said fuel controller and said transmission operator, said processing machine having a memory containing logic rules effective, upon determining a requirement for disengaging said first positive clutch:
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(1) for sensing for disengagement of said first positive clutch; and (2) until disengagement of said first positive clutch is sensed, for (a) continuously causing said transmission operator to urge said first and second clutch members of said first positive clutch into the disengaged position thereof; and (b) causing said fuel controller, in sequence, to; (i) cause engine fueling to equal said minimum value thereof (302); (ii) cause fueling of said engine to be increased to a first predetermined value and then to be decreased to said minimum value thereof (304); and (iii) after a first predetermined period of time, cause fueling of said engine to be increased to a second predetermined value and then decreased to said minimum value thereof (306), said second predetermined value being greater than said first predetermined value. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An information processing machine (42) for controlling shifting in a vehicular automated mechanical transmission system comprising a fuel-controlled engine (14) having a minimum (0% WOT) and a maximum (100% WOT) magnitude of fueling, a fuel controller (26) for controlling fueling of the engine, a multiple-speed, changegear transmission (12) having a plurality of selectively engaged forward gear ratios, gear ratio shifts of said transmission comprising a sequence of disengaging a first positive clutch (142A/134A) and then engaging a second positive clutch, both of said positive clutches comprising a first clutch member (134A) having a rotational speed determined by the rotational speed of the engine (ES, IS) and a second clutch member (142A) having a rotational speed determined by vehicle ground speed (OS), a transmission operator (34) for selectively positioning said clutch members to engaged and disengaged positions, a non-positive coupling (16) drivingly interposed between said engine and said transmission, and a control unit (42) for receiving a plurality of input signals including an input signal indicative of engine speed and an input signal indicative of engaged and disengaged positions of said clutch members and for processing same according to predetermined logic rules to issue command output signals to a plurality of system actuators including said fuel controller and said transmission operator, said machine including a memory storing logic rules effective, upon determining a requirement for disengaging said first positive clutch:
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(1) for causing sensing for disengagement of said first positive clutch; and (2) until disengagement of said first positive clutch is sensed, (a) for continuously causing said transmission operator to urge said first and second clutch members of said first positive clutch into the disengaged position thereof; and (b) for causing said fuel controller, in sequence, to; (i) cause engine fueling to equal said minimum value thereof (302); (ii) cause fueling of said engine to be increased to a first predetermined value and then to be decreased to said minimum value thereof (304); and (iii) after a first predetermined period of time, cause fueling of said engine to be increased to a second predetermined value and then decreased to said minimum value thereof (306), said second predetermined value being greater than said first predetermined value. - View Dependent Claims (22, 23, 24, 25, 26)
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Specification