Engine and transmission power trains and controls

Claim 2

In a transmission; a transmission drive train having fluid operated friction engaging drive means operative to establish a first drive in response to fluid pressure varying between a low pressure and a high pressure to provide neutral in said transmission at one of said pressures and transmitting increasing torque in first drive without slip with varying pressure and transmitting high torque in first drive without slip at tHe other of said pressures; a fuel feed control providing a low fuel feed phase for providing a low torque phase and a high fuel feed phase for providing high torque; and operator controlled means operatively connected to said drive means and fuel feed control having an off position providing said one pressure for neutral and positioning said fuel feed control in the low fuel feed phase and movable through a first range of movement to gradually vary said pressure for gradual engagement to transmit increasing torque merely sufficiently for drive without slip at the low torque and maintain said low fuel feed phase and then movable through a further range of movement to more rapidly vary the pressure to the other pressure for faster engagement in the high fuel feed phase for full engagement without slip for transmitting up to high torque and increasing said fuel feed control through said high fuel feed phase.

Claim 3

The invention defined in claim 1 and automatic timed pressure increasing means operatively connected to said drive means and said operator controlled means operative to regulate at the same pressure as said gradually varying pressure during said first range of movement and to provide a more rapid timed rate of increase as the pressure is varied for engagement during said further range of movement.

Claim 4

The invention defined in claim 1 and said operator controlled means maintaining said fuel feed control in said idle position during a large portion of said first range of movement and increasing said fuel feed in the terminal portion of said first range of movement to near idle and in said further range of movement moving said fuel feed control from near idle to full fuel feed.

Claim 5

The invention defined in claim 1 and said transmission having governor means providing an output speed signal and overcontrol means responsive to said output speed signal indication indicating a speed greater than first drive speed when driving in the idle fuel feed phase operatively connected to said operator controlled means to overcontrol said operator controlled means to provide said other pressure for full engagement.

Claim 6

In a transmission; a transmission drive train having an input, an output and fluid operated friction engaging first drive means operative to establish a first drive between said input and output in a low power range in response to fluid pressure varying between a minimum and maximum in a low pressure range and in a high power range in response to fluid pressure varying between a minimum pressure and a maximum pressure with the minimum pressure in the low pressure range providing neutral in said transmission and the maximum pressure in each pressure range respectively providing first drive without slip at the high power in each power range; a fuel feed control movable in a low power range from idle position to near idle position and in a high power range from near idle position to full fuel feed position and torque signal means providing a torque signal varying as a function of transmission input torque; operator controlled means having an off position providing said minimum pressure in said low pressure range for neutral and positioning said fuel feed control in said idle position and movable through a first range of movement to gradually vary said pressure to said maximum in said low pressure range for gradual engagement to transmit increasing power in said low power range and moving said fuel feed control through said low power range and movable through a further range of movement to more rapidly vary said pressure from minimum to maximum in said high pressure range for full engagement transmitting full torque without slip and moving said fuel feed control through said high power range and overcontrol means responsive to said torque signal indicating significantly more than idling torque value of transmission input torque operatively connected to said operator controlled means to overcontrol said operator controlled means to provide said high pressure range for Full engagement.

Claim 7

In a transmission; a transmission drive train having an input, an output and fluid operated friction engaging first drive means operative to establish a first drive between said input and output in a low power range in response to fluid pressure varying between a minimum and maximum in a low pressure range and in a high power range in response to fluid pressure varying between a minimum pressure and a maximum pressure with the minimum pressure in the low pressure range providing neutral in said transmission and the maximum pressure in each pressure range respectively providing first drive without slip at the high power in each power range; a fuel feed control movable in a low power range from idle position to near idle position and in a high power range from near idle position to full fuel feed position and torque signal means providing a torque signal varying as a function of transmission input torque; operator controlled means having an off position providing said minimum pressure in said low pressure range for neutral and positioning said fuel feed control in said idle position and movable through a first range of movement to gradually vary said pressure to said maximum in said low pressure range for gradual engagement to transmit increasing power in said low power range and moving said fuel feed control through said low power range and movable through a further range of movement to more rapidly vary said pressure from minimum to maximum in said high pressure range for full engagement transmitting full torque without slip and moving said fuel feed control through said high power range and overcontrol means responsive to said torque signal indicating significantly more than idling torque value of transmission input torque operatively connected to said operator controlled means to overcontrol said operator controlled means to provide said high pressure range for Full engagement.

Claim 8

The invention defined in claim 5 and said operator controlled means providing partial overlap between said low and high pressure ranges.

Claim 9

The invention defined in claim 5 and automatic timed pressure increasing means operatively connected to said drive means and operator controlled means operative to regulate at the same pressure when said operator control means is providing pressures in said low pressure range and to provide a timed rate of pressure increase and then a fast rise to full pressure in said high pressure range.

Claim 10

The invention defined in claim 5 and said transmission having governor means providing an output speed signal and overcontrol means responsive to said output speed signal indication indicating a speed greater than first drive speed when driving in the low power range operatively connected to said operator controlled means to overcontrol said operator controlled means to provide said other pressure for full engagement.

Claim 11

In a transmission; a fuel feed control movable in a low power range idle position to near idle position and in a high power range from beyond near idle position to full fuel feed position; a transmission having fluid operated friction engaging first drive means operative to control the establishment of a first drive in response to fluid pressure varying the drive capacity to provide in response to a minimum capacity pressure in a low capacity pressure range a positive neutral, increasing capacity pressure to a maximum capacity pressure in the low capacity pressure range engaging first drive initially with slip and then without slip at increasing capacity pressure in the low capacity pressure range as power increases in the low power range and on increasing capacity pressure from a minimum value to a maximum value in a high capacity pressure range engaging first drive with slip and then without slip at increasing capacity pressure in the high capacity range as power increases in the high power range; operator controlled means operatively connected to said drive means and to said fuel feed control and having an off position providing said minimum capacity pressure in said low capacity pressure range for neutral and positioning said fuel feed control in said idle position, movable in a first range of movement to gradually increase said capacity pressure through said low capacity pressure range for gradual engagement for drive initially with slip and then without slip at each power value up to the maximum in said low power range and moving said fuel feed control through said low power range and a second range of movement increasing the capacity pressure in said high capacity pressure range for drive initially with slip and then without slip at each power value up to the maximum power in said high power range and moving said fuel feed control through said high power range.

Claim 12

In a transmission; a fuel feed control movable in a low power range idle position to near idle position and in a high power range from beyond near idle position to full fuel feed position; a transmission having fluid operated friction engaging first drive means operative to control the establishment of a first drive in response to fluid pressure varying the drive capacity to provide in response to a minimum capacity pressure in a low capacity pressure range a positive neutral, increasing capacity pressure to a maximum capacity pressure in the low capacity pressure range engaging first drive initially with slip and then without slip at increasing capacity pressure in the low capacity pressure range as power increases in the low power range and on increasing capacity pressure from a minimum value to a maximum value in a high capacity pressure range engaging first drive with slip and then without slip at increasing capacity pressure in the high capacity range as power increases in the high power range; operator controlled means operatively connected to said drive means and to said fuel feed control and having an off position providing said minimum capacity pressure in said low capacity pressure range for neutral and positioning said fuel feed control in said idle position, movable in a first range of movement to gradually increase said capacity pressure through said low capacity pressure range for gradual engagement for drive initially with slip and then without slip at each power value up to the maximum in said low power range and moving said fuel feed control through said low power range and a second range of movement increasing the capacity pressure in said high capacity pressure range for drive initially with slip and then without slip at each power value up to the maximum power in said high power range and moving said fuel feed control through said high power range.

Claim 13

The invention defined in claim 9 and automatic timed pressure regulating means operatively connected to said drive means and operator controlled means operative to maintain the capacity pressure provided by said operator controlled means in the low capacity pressure range and operative in response to capacity pressure in said high capacity pressure range to gradually increase capacity pressure at a timed rate to engage first drive and quickly increase capacity pressure to the maximum capacity in the high capacity pressure range for first drive engagement.

Claim 14

The invention defined in claim 9 and said operator controlled means maintaining said fuel feed control in said idle position during a large portion of said first range of movement and in a terminal portion of said first range of movement increasing to near idle position varying the capacity in said low capacity pressure range for engagement and then with continued movement moving said fuel feed control from near idle to full fuel feed.

Claim 15

The invention defined in claim 9 and said transmission having governor means providing an output speed signal and overcontrol means Responsive to said output speed signal indicating a speed above the maximum speed when driving in first drive in said low power range operatively connected to said operator controlled means to overcontrol said operator controlled means to provide said high capacity pressure range for engagement.

Claim 16

The invention defined in claim 9 and an engine torque demand signal means providing a torque signal and overcontrol means responsive to said torque signal means operatively connected to said operator controlled means for preventing said operator controlled means providing capacity pressure in said low capacity pressure range when engine torque is more than near idle torque.

Claim 17

The invention defined in claim 13 and an engine providing an operative pressure varying as a function of torque and torque demand and said torque demand means connected to said engine and being responsive to said engine operating pressure varying as a function of engine torque and torque demand and providing a torque demand signal varying as a function of said engine operating pressure.

Claim 18

The invention defined in claim 13 and a gas turbine engine having a compressor providing a compressor discharge pressure and said torque demand means connected to said engine and providing a torque demand signal varying as a function of compressor discharge pressure.

Claim 19

In a transmission; fuel feed control means providing fuel feed movable in a low power phase and in a high power range above the low power phase; a transmission having fluid operated friction engaging first drive means operative to control the establishment of a first drive in response to fluid pressure varying the drive capacity to provide in response to a minimum capacity pressure in a low capacity pressure range a positive neutral, increasing capacity pressure to a maximum capacity pressure in the low capacity pressure range engaging first drive initially with slip and then without slip at increasing capacity pressure in the low capacity pressure range as power increases in the low power range and on increasing capacity pressure from a minimum value to a maximum value in a high capacity pressure range engaging first drive with slip and then without slip at increasing capacity pressure in the high capacity range as power increases in the high power range; operator controlled means operatively connected to said drive means and to said fuel feed control means and having an off position providing said minimum capacity pressure in said low capacity pressure range for neutral and positioning said fuel feed control means in said low power phase, movable in a first range of movement to gradually increase said capacity pressure through said low capacity pressure range for gradual engagement for drive initially with slip and then without slip at the power value in said low power phase and maintaining said fuel feed control means in said low power phase and a second range of movement increasing the capacity pressure in said high capacity pressure range for drive initially with slip and then without slip at each power value up to the maximum power in said high power range and moving said fuel feed control means through said high power range.

Claim 20

In a transmission; fuel feed control means providing fuel feed movable in a low power phase and in a high power range above the low power phase; a transmission having fluid operated friction engaging first drive means operative to control the establishment of a first drive in response to fluid pressure varying the drive capacity to provide in response to a minimum capacity pressure in a low capacity pressure range a positive neutral, increasing capacity pressure to a maximum capacity pressure in the low capacity pressure range engaging first drive initially with slip and then without slip at increasing capacity pressure in the low capacity pressure range as power increases in the low power range and on increasing capacity pressure from a minimum value to a maximum value in a high capacity pressure range engaging first drive with slip and then without slip at increasing capacity pressure in the high capacity range as power increases in the high power range; operator controlled means operatively connected to said drive means and to said fuel feed control means and having an off position providing said minimum capacity pressure in said low capacity pressure range for neutral and positioning said fuel feed control means in said low power phase, movable in a first range of movement to gradually increase said capacity pressure through said low capacity pressure range for gradual engagement for drive initially with slip and then without slip at the power value in said low power phase and maintaining said fuel feed control means in said low power phase and a second range of movement increasing the capacity pressure in said high capacity pressure range for drive initially with slip and then without slip at each power value up to the maximum power in said high power range and moving said fuel feed control means through said high power range.

Claim 21

The invention defined in laim 16 and automatic timed pressure regulating means operatively connected to said drive means and said operator controlled means only regulating the capacity pressure at a minimum capacity pressure in said high capacity pressure range, gradually increasing the capacity pressure at a timed rate for a smooth shift and then quickly increasing capacity pressure to a maximum capacity pressure in said high capacity pressure range.

Claim 22

The invention defined in laim 16 and automatic timed pressure regulating means operatively connected to said drive means and said operator controlled means only regulating the capacity pressure at a minimum capacity pressure in said high capacity pressure range, gradually increasing the capacity pressure at a timed rate for a smooth shift and then quickly increasing capacity pressure to a maximum capacity pressure in said high capacity pressure range.

Claim 23

The invention defined in claim 16 and said transmission having governor means providing an output speed signal and overcontrol means responsive to said output speed signal indication indicating a speed greater than first drive speed when driving in the low power range operatively connected to said operator controlled means to overcontrol said opeRator controlled means to provide said high pressure range.

Claim 24

In a transmission; a fuel feed control movable in a low power range idle position to near idle position and in a high power range from beyond near idle position to full fuel feed position; a transmission having fluid operated friction engaging first drive means operative to control the establishment of a first drive in response to increasing fluid pressure increasing the drive capacity to provide in response to a minimum pressure in a low pressure range a positive neutral, increasing pressure to a maximum pressure in the low pressure range engaging first drive initially with slip and then without slip at increasing pressure in the low pressure range as power increases in the low power range and on increasing pressure from a minimum value to a maximum value in a high pressure range engaging first drive with slip and then without slip at increasing pressure in the high pressure range as power increases in the high power range; operator controlled means operatively connected to said drive means and to said fuel feed control and having an off position providing said minimum pressure in said low pressure range for neutral and positioning said fuel feed control in said idle position, movable in a first range of movement to gradually increase said pressure through said low pressure range for gradual engagement for drive initially with slip and then without slip at each power value up to the maximum in said low power range and moving said fuel feed control through said low power range and a second range of movement increasing the pressure in said high pressure range for drive initially with slip and then without slip at each power value up to the maximum power in said high power range and moving said fuel feed control through said high power range.

Claim 25

In a transmission; a fuel feed control movable in a low power range idle position to near idle position and in a high power range from beyond near idle position to full fuel feed position; a transmission having fluid operated friction engaging first drive means operative to control the establishment of a first drive in response to increasing fluid pressure increasing the drive capacity to provide in response to a minimum pressure in a low pressure range a positive neutral, increasing pressure to a maximum pressure in the low pressure range engaging first drive initially with slip and then without slip at increasing pressure in the low pressure range as power increases in the low power range and on increasing pressure from a minimum value to a maximum value in a high pressure range engaging first drive with slip and then without slip at increasing pressure in the high pressure range as power increases in the high power range; operator controlled means operatively connected to said drive means and to said fuel feed control and having an off position providing said minimum pressure in said low pressure range for neutral and positioning said fuel feed control in said idle position, movable in a first range of movement to gradually increase said pressure through said low pressure range for gradual engagement for drive initially with slip and then without slip at each power value up to the maximum in said low power range and moving said fuel feed control through said low power range and a second range of movement increasing the pressure in said high pressure range for drive initially with slip and then without slip at each power value up to the maximum power in said high power range and moving said fuel feed control through said high power range.

Claim 26

The invention defined in claim 19 and automatic timed pressure regulating means operatively connected to said drive means and said operator controlled means only regulating pressure in said high pressure range initially at a minimum value and then increasing pressure at a timed rate for a smooth shift and then to maximum value in said high pressure range.

Claim 27

The invention defined in claim 19 and torque signal means providing a torque signal and overcontrol means responsive to said torque signal means operatively connected to said operator controlled means for preventing said operator controlled means providing said low pressure range when torque is significantly more than idle torque.

Claim 28

In a transmission; transmission gear means having an input, an output, a multiratio drive gear train connecting said input and output and a plurality of fluid operated speed ratio drive means including a first forward drive means selectively operative to establish first drive and a plurality of increasing speed forward drives and a reverse drive in response to fluid pressure; a fuel feed control means movable in a low power range to near idle position and from idle position to a high power range from near idle position to full fuel feed position for controlling the fuel feed of an engine; torque signal means providing a torque signal varying as a function of input torque and torque demand; governor means operatively connected to said output providing a governor signal varying as a function of output speed; a source of fluid at a high regulated pressure; shift control means including manual forward reverse control means and automatic forward shift control means operatively connected to said governor means, said torque signal means, said source and said plurality of drive engaging devices manually operable to selectively supply fluid to engage said reverse drive or supply fluid to said automatic forward shift control means to provide a first drive apply pressure and to engage said increasing speed ratio drives to provide increasing speed ratio forward drives with increasing speed and reducing torque demand; said first speed forward drive engaging means being operative in respoNse to fluid pressure and having a power capacity proportional to the fluid pressure and providing slip and non slip drive as the capacity provided by the pressure approaches and equals the capacity required; a shift regulator valve means operatively connected to said automatic shift control means for controlling said first drive apply pressure; operator controlled means operatively connected to and controlling said fuel feed control means and said shift regulator valve means to provide in an off position a minimum pressure less than required for engaging said first drive means for neutral and positioning said fuel feed control means in said idle position and on slow movement through a first range of movement from off position to near idle position to gradually increase said pressure for gradual engagement of said first drive means initially with slip and then without slip at increasing pressures in a low capacity pressure range as power increases in said low power range and moving said fuel feed control means from said idle position to said near idle position and thereafter moving said fuel feed control in a second range from near idle position to full fuel feed position to provide said high source pressure and moving said fuel feed control means from near idle position to full fuel feed position; overcontrol means operatively connected to said shift control means, said governor means and said torque signal means operative to overcontrol said shift regulator valve to provide said high source pressure at all times in response to said governor signal indicating output speed above first drive speed in the low power range, said torque signal indicating input torque at input near idle torque and selection of reverse drive and automatic timed pressure control means connected to said automatic shift control means to control said first drive apply pressure only when at said high source pressure value for a timed pressure increase rate for quick smooth engagement of first drive and not affecting pressures in said low pressure range.

Claim 29

In a transmission; transmission gear means having an input, an output, a multiratio drive gear train connecting said input and output and a plurality of fluid operated speed ratio drive means including a first forward drive means selectively operative to establish first drive and a plurality of increasing speed forward drives and a reverse drive in response to fluid pressure; a fuel feed control means movable in a low power range to near idle position and from idle position to a high power range from near idle position to full fuel feed position for controlling the fuel feed of an engine; torque signal means providing a torque signal varying as a function of input torque and torque demand; governor means operatively connected to said output providing a governor signal varying as a function of output speed; a source of fluid at a high regulated pressure; shift control means including manual forward reverse control means and automatic forward shift control means operatively connected to said governor means, said torque signal means, said source and said plurality of drive engaging devices manually operable to selectively supply fluid to engage said reverse drive or supply fluid to said automatic forward shift control means to provide a first drive apply pressure and to engage said increasing speed ratio drives to provide increasing speed ratio forward drives with increasing speed and reducing torque demand; said first speed forward drive engaging means being operative in respoNse to fluid pressure and having a power capacity proportional to the fluid pressure and providing slip and non slip drive as the capacity provided by the pressure approaches and equals the capacity required; a shift regulator valve means operatively connected to said automatic shift control means for controlling said first drive apply pressure; operator controlled means operatively connected to and controlling said fuel feed control means and said shift regulator valve means to provide in an off position a minimum pressure less than required for engaging said first drive means for neutral and positioning said fuel feed control means in said idle position and on slow movement through a first range of movement from off position to near idle position to gradually increase said pressure for gradual engagement of said first drive means initially with slip and then without slip at increasing pressures in a low capacity pressure range as power increases in said low power range and moving said fuel feed control means from said idle position to said near idle position and thereafter moving said fuel feed control in a second range from near idle position to full fuel feed position to provide said high source pressure and moving said fuel feed control means from near idle position to full fuel feed position; overcontrol means operatively connected to said shift control means, said governor means and said torque signal means operative to overcontrol said shift regulator valve to provide said high source pressure at all times in response to said governor signal indicating output speed above first drive speed in the low power range, said torque signal indicating input torque at input near idle torque and selection of reverse drive and automatic timed pressure control means connected to said automatic shift control means to control said first drive apply pressure only when at said high source pressure value for a timed pressure increase rate for quick smooth engagement of first drive and not affecting pressures in said low pressure range.