Plants comprising a combustion engine and a compressor driven by said engine

Claim 2

In a plant comprising a combustion engine and a fluid compressor driven by said engine, the combination comprising: a. a governor responsive to variations in discharge pressure of the working fluid in the compressor over a predetermined discharge pressure range, b. said engine being adapted for having its operating speed controlled by said governor, c. said governor comprising means for increasing the speed of the engine as said discharge pressure falls and for decreasing the speed as the discharge pressure rises. d. valve means for loading and unloading the compressor within said pressure range, e. means for actuating said valve means to said loading and unloading conditions, f. means for applying fluid pressure on said actuating means for unloading said compressor when said compressor discharge pressure exceeds a predetermined high value, g. said combustion engine including a fuel control member operable between a maximum load full speed position and a reduced idle speed position, and said governor including a spring device having a first portion connected to said fuel control member, a first piston member operable to actuate said first spring portion to move the fuel control member toward said full speed position, and a second piston member operable to actuate said first spring portion to move the fuel control member toward said reduced idle speed position, h. said first piston member being operated from a pressure liquid source and said second piston member being actuated by the discharge pressure of the compressor.

Claim 3

In a plant comprising a combustion engine and a fluid compressor driven by said engine, the combination comprising: a. a governor responsive to a discharge pressure of the compressor over a predetermined discharge pressure range, b. said governor providing a control for the operating speed of the engine, c. a first valve means movabLe in an opening and a closing direction for loading and unloading the compressor, respectively, within said pressure range, d. actuating means for said first valve means, e. first means for applying liquid pressure on said actuating means for loading said compressor, f. second means for applying fluid pressure on said actuating means for unloading said compressor when said compressor discharge pressure exceeds a pre-determined high value, g. said combustion engine including a fuel control member operable between a maximum load full speed position and a reduced idle speed position, h. said governor including a spring device having a first portion connected to said fuel control member, a first piston member operable to actuate said first spring portion to move the fuel control member toward said full speed position and a second piston member operable to actuate said first spring portion to move the fuel control member toward said reduced idle speed position, and i. said first piston member being operated from a pressure liquid source and said second piston member being actuated by the discharge pressure of the compressor.

Claim 4

In a plant comprising a combustion engine and a fluid compressor driven by said engine, the combination comprising: a. a governor responsive to a discharge pressure of the compressor over a predetermined discharge pressure range, b. said governor providing a control for the operating speed of the engine, c. a first valve means movabLe in an opening and a closing direction for loading and unloading the compressor, respectively, within said pressure range, d. actuating means for said first valve means, e. first means for applying liquid pressure on said actuating means for loading said compressor, f. second means for applying fluid pressure on said actuating means for unloading said compressor when said compressor discharge pressure exceeds a pre-determined high value, g. said combustion engine including a fuel control member operable between a maximum load full speed position and a reduced idle speed position, h. said governor including a spring device having a first portion connected to said fuel control member, a first piston member operable to actuate said first spring portion to move the fuel control member toward said full speed position and a second piston member operable to actuate said first spring portion to move the fuel control member toward said reduced idle speed position, and i. said first piston member being operated from a pressure liquid source and said second piston member being actuated by the discharge pressure of the compressor.

Claim 5

In a plant comprising a combustion engine and a fluid compressor driven by the combustion engine, the combination comprising: a. a governor responsive to variations in discharge pressure of the compressor over a predetermined discharge range for controlling the speed of the engine, b. a valve operable to open and closed positions for controlling the flow of fluid through the compressor, c. actuating means for said compressor fluid flow valve, d. first means for applying liquid pressure on said actuating means to move said fluid flow valve to the open position, e. second means for applying fluid pressure on said actuating means to move said fluid flow valve to the closed position at a predetermined value of differential pressure to thereby unload the compressor, f. said second pressure applying means including an unloading control valve operable to supply pressure fluid to said actuating means for moving said compressor fluid flow valve to the unloading closed position, g. said governor including an unloading control valve actuator, at least one fluid actuated piston member, a spring device and said unloading control valve, h. said spring device being connected to a fuel control member which controls fuel supply to the engine, i. one portion of said spring device being adapted to move the fuel control member between an idle stop and a full speed maximum load stop, and j. a second portion of said spring device operable by said fluid actuated piston member to move said unloading control valve actuator to a position for actuating said unloading control valve thereby supplying pressure fluid for unloading the compressor in response to a predetermined discharge fluid pressure. k. said second spring portion being adjustable to vary the predetermined discharge valve pressure at which said valve actuator responds, l. said second spring portion comprising a number of arcuate leaf springs of different lengths and adjustable by turning to different positions in which one or more leaf springs are effective.

Claim 6

In a plant comprising a combustion engine and a fluid compressor driven by the combustion engine, the combination comprising: a. a governor responsive to variations in discharge pressure of the compressor over a predetermined discharge range for controlling the speed of the engine, b. a valve operable to open and closed positions for controlling the flow of fluid through the compressor, c. actuating means for said compressor fluid flow valve, d. first means for applying liquid pressure on said actuating means to move said fluid flow valve to the open position, e. second means for applying fluid pressure on said actuating means to move said fluid flow valve to the closed position at a predetermined value of differential pressure to thereby unload the compressor, f. said second pressure applying means including an unloading control valve operable to supply pressure fluid to said actuating means for moving said compressor fluid flow valve to the unloading closed position, g. said governor including an unloading control valve actuator, at least one fluid actuated piston member, a spring device and said unloading control valve, h. said spring device being connected to a fuel control member which controls fuel supply to the engine, i. one portion of said spring device being adapted to move the fuel control member between an idle stop and a full speed maximum load stop, and j. a second portion of said spring device operable by said fluid actuated piston member to move said unloading control valve actuator to a position for actuating said unloading control valve thereby supplying pressure fluid for unloading the compressor in response to a predetermined discharge fluid pressure. k. said second spring portion being adjustable to vary the predetermined discharge valve pressure at which said valve actuator responds, l. said second spring portion comprising a number of arcuate leaf springs of different lengths and adjustable by turning to different positions in which one or more leaf springs are effective.

Claim 7

In a plant comprising a combustion engine and a fluid compressor driven by said engine, the combination comprising: a. an oil pump driven by the plant and providing a source of substantially constant oil pressure, b. a member operable to control fuel supply to the combustion engine, c. a first valve means having open and closed positions for controlling the flow of working fluid through the compressor between loading and unloading conditions, respectively, d. a second valve means adapted to control a pressure fluid bias on said first valve means, e. a governor having a casing, f. a spring device disposed in said governor casing and being connected to said fuel control member, g. one portion of said spring device being adapted to move the fuel control member between an idle stop and a full speed maximum load stop, h. a second portion of said spring device being adapted to effect movement of said second valve means from a loading to an unloading position, i. said governor includes a first piston member actuated by said constant pressure oil and a second piston member actuated by a differential between a predetermined low working fluid pressure and a discharge pressure range of the compressor, j. said first piston member being adapted to produce upon actuation thereof a power bias on the spring device in a first direction toward said full speed stop for increasing fuel supply to the engine, k. said second piston member being adapted to produce upon actuation thereof a power bias on said spring device in a second direction opposite said first direction for reducing the fuel supply to the engine, said actuation being effected upon an increase in said differential pressure over a high predetermined value.

Claim 8

In a plant comprising a combustion engine and a fluid compressor driven by said engine, the combination comprising: a. an oil pump driven by the plant and providing a source of substantially constant oil pressure, b. a member operable to control fuel supply to the combustion engine, c. a first valve means having open and closed positions for controlling the flow of working fluid through the compressor between loading and unloading conditions, respectively, d. a second valve means adapted to control a pressure fluid bias on said first valve means, e. a governor having a casing, f. a spring device disposed in said governor casing and being connected to said fuel control member, g. one portion of said spring device being adapted to move the fuel control member between an idle stop and a full speed maximum load stop, h. a second portion of said spring device being adapted to effect movement of said second valve means from a loading to an unloading position, i. said governor includes a first piston member actuated by said constant pressure oil and a second piston member actuated by a differential between a predetermined low working fluid pressure and a discharge pressure range of the compressor, j. said first piston member being adapted to produce upon actuation thereof a power bias on the spring device in a first direction toward said full speed stop for increasing fuel supply to the engine, k. said second piston member being adapted to produce upon actuation thereof a power bias on said spring device in a second direction opposite said first direction for reducing the fuel supply to the engine, said actuation being effected upon an increase in said differential pressure over a high predetermined value.

Claim 9

In a plant as defined in claim 4 wherein a discharge fluid pressure amplifier is provided for actuation of said second piston member, said discharge fluid pressure amplifier comprising a housing, a discharge conduit leading from said compressor, a chamber in said amplifier housing communicating with said discharge conduit, an amplifier valve in said housing operable to open substantially at a first predetermined pressure value and to admit said discharge fluid to actuate said second piston member for reducing the fuel supply upon further increase of said discharge fluid pressure.

Claim 10

In a plant as defined in claim 5 wherein a spring is provided in said amplifier housing and arranged to bias said amplifier valve in a closing direction, and means are disposed on the amplifier housing for adjusting the spring bias.

Claim 11

In a plant as defined in claim 5 wherein a vent passage is provided between the chamber in the amplifier housing and the atmosphere.

Claim 12

In a plant comprising a combustion engine and a compressor driven by said engine, the combination comprising: a. a source of substantially constant pressure liquid, b. a member operable to control fuel supply to the combustion engine, c. a first valve means having open and closed positions for controlling fluid flow through said compresssor for unloading and loading the compressor, respectively, d. a second valve means operable to control a pressure fluid bias on said first valve means for said compressor, e. a governor having a casing, f. a spring device disposed in said governor casing and being connected to said fuel control member, g. one portion of said spring device being adapted to move the fuel control member between an idle stop and a full speed maximum load stop, h. a second portion of said spring device being adapted to effect movement of said second valve means from a loading to an unloading position, i. said governor includes a first piston member actuated by said constant pressure liquid and a second piston member actuated by discharge fluid pressure of said compressor, j. said first piston member being adapted to produce upon actuation thereof a power bias on the spring device in a first direction toward said full speed stop for increasing fuel supply to the engine, k. said second piston member being adapted to produce upon actuation thereof a power bias on said spring device in a second direction opposite said first direction for reducing the fuel supply to the engine, said actuation being effected upon an increase in said discharge pressure over a first predetermined value, l. said spring device comprising a generally U-shaped flat spring having two shanks, a first shank being fixed with its end to the casing and a second shank forming a loop secured with its end to said fuel supply control member.

Claim 13

In a plant comprising a combustion engine and a compressor driven by said engine, the combination comprising: a. a source of substantially constant pressure liquid, b. a member operable to control fuel supply to the combustion engine, c. a first valve means having open and closed positions for controlling fluid flow through said compresssor for unloading and loading the compressor, respectively, d. a second valve means operable to control a pressure fluid bias on said first valve means for said compressor, e. a governor having a casing, f. a spring device disposed in said governor casing and being connected to said fuel control member, g. one portion of said spring device being adapted to move the fuel control member between an idle stop and a full speed maximum load stop, h. a second portion of said spring device being adapted to effect movement of said second valve means from a loading to an unloading position, i. said governor includes a first piston member actuated by said constant pressure liquid and a second piston member actuated by discharge fluid pressure of said compressor, j. said first piston member being adapted to produce upon actuation thereof a power bias on the spring device in a first direction toward said full speed stop for increasing fuel supply to the engine, k. said second piston member being adapted to produce upon actuation thereof a power bias on said spring device in a second direction opposite said first direction for reducing the fuel supply to the engine, said actuation being effected upon an increase in said discharge pressure over a first predetermined value, l. said spring device comprising a generally U-shaped flat spring having two shanks, a first shank being fixed with its end to the casing and a second shank forming a loop secured with its end to said fuel supply control member.

Claim 14

In a plant comprising a combustion engine and a compressor driven by said engine, the combination comprising: a. a sourCe of substantially constant pressure fluid, b. a member operable to control fuel supply to the combustion engine, c. a first valve means for controlling fluid flow through said compressor for unloading of the compressor, d. a second valve means operable to control a pressure fluid bias on said first valve means, e. a governor having a casing, f. a spring device disposed in said governor casing and being connected to said fuel control member, g. one portion of said device being adapted to move the control member between an idle stop and a full speed maximum load stop, h. a second portion of said device being adapted to effect movement of said second valve means from a loading to an unloading position, i. said governor includes a first piston member actuated by said constant pressure liquid and a second piston member actuated by a discharge fluid pressure of said compressor, j. said first piston member being adapted to produce upon actuation thereof a power bias on the spring device in a first direction toward said full speed stop for increasing fuel supply to the engine, k. said second piston member being adapted to produce upon actuation thereof a power bias on said spring device in a second direction opposite said first direction for reducing the flow of fuel supply to the engine, said actuation being effected upon an increase in said discharge pressure over a first predetermined value, l. a spring element forming said second portion of said spring device, m. said spring element being arranged to actuate said second valve means to unload the compressor with the spring device when the spring device has returned the fuel control member to idle position and the discharge fuel pressure continues to rise, n. said spring element being adjustable to vary the moment when unloading and loading takes place, o. said spring device comprising an arc-shaped flat spring, p. the effective length and distance from the second valve means being adjustable by swinging of the spring element on a supporting pivot carried by the valve device.

Claim 15

In a plant comprising a combustion engine and a compressor driven by said engine, the combination comprising: a. a sourCe of substantially constant pressure fluid, b. a member operable to control fuel supply to the combustion engine, c. a first valve means for controlling fluid flow through said compressor for unloading of the compressor, d. a second valve means operable to control a pressure fluid bias on said first valve means, e. a governor having a casing, f. a spring device disposed in said governor casing and being connected to said fuel control member, g. one portion of said device being adapted to move the control member between an idle stop and a full speed maximum load stop, h. a second portion of said device being adapted to effect movement of said second valve means from a loading to an unloading position, i. said governor includes a first piston member actuated by said constant pressure liquid and a second piston member actuated by a discharge fluid pressure of said compressor, j. said first piston member being adapted to produce upon actuation thereof a power bias on the spring device in a first direction toward said full speed stop for increasing fuel supply to the engine, k. said second piston member being adapted to produce upon actuation thereof a power bias on said spring device in a second direction opposite said first direction for reducing the flow of fuel supply to the engine, said actuation being effected upon an increase in said discharge pressure over a first predetermined value, l. a spring element forming said second portion of said spring device, m. said spring element being arranged to actuate said second valve means to unload the compressor with the spring device when the spring device has returned the fuel control member to idle position and the discharge fuel pressure continues to rise, n. said spring element being adjustable to vary the moment when unloading and loading takes place, o. said spring device comprising an arc-shaped flat spring, p. the effective length and distance from the second valve means being adjustable by swinging of the spring element on a supporting pivot carried by the valve device.

Claim 16

In a plant comprising a combustion engine and a compressor driven by said engine, the combination comprising: a. an oil pump driven by the plant and providing a source of substantially constant pressure oil, b. a member operable to control fuel supply to the combustion engine, c. a first valve means for controlling the flow of working fluid through the compressor, d. a second valve means adapted for providing pressure fluid bias on said first valve means, e. a governor having a casing, f. a spring device disposed in said governor casing and being connected to said fuel control member, g. one portion of said device being adapted to move the fuel control member between an idle stop and a full speed maximum load stop, h. a second portion of said device being adapted to effect movement of said second valve means from a loading to an unloading position, i. said governor includes a first piston member actuated by said constant pressure oil and a second piston member actuated by a differential between a predetermined low working fluid pressure and a discharge pressure range of the compressor, j. said first piston member being adapted to produce upon actuation thereof a power bias on the spring device in a first direction toward said full speed stop for increasing the fuel supply to the engine, k. said second piston member being adapted to produce upon actuation thereof a power bias on said spring device in a second direction opposite said first direction for reducing the fuel supply to the engine, said actuation being effected upon an increase in said differential pressure over a high predetermined value, l. said governor further including a pressure liquid housing communicating with a source of pressure liquid, m. a chamber in said pressure liquid housing in which said first piston member is movable, n. a conduIt leading from a source of pressure liquid to said chamber, and o. a constant pressure control valve in said communication arranged to provide a substantially constant pressure in said chamber thereby actuating the first piston for producing said power bias to the spring device.

Claim 17

In a plant comprising a combustion engine and a compressor driven by said engine, the combination comprising: a. an oil pump driven by the plant and providing a source of substantially constant pressure oil, b. a member operable to control fuel supply to the combustion engine, c. a first valve means for controlling the flow of working fluid through the compressor, d. a second valve means adapted for providing pressure fluid bias on said first valve means, e. a governor having a casing, f. a spring device disposed in said governor casing and being connected to said fuel control member, g. one portion of said device being adapted to move the fuel control member between an idle stop and a full speed maximum load stop, h. a second portion of said device being adapted to effect movement of said second valve means from a loading to an unloading position, i. said governor includes a first piston member actuated by said constant pressure oil and a second piston member actuated by a differential between a predetermined low working fluid pressure and a discharge pressure range of the compressor, j. said first piston member being adapted to produce upon actuation thereof a power bias on the spring device in a first direction toward said full speed stop for increasing the fuel supply to the engine, k. said second piston member being adapted to produce upon actuation thereof a power bias on said spring device in a second direction opposite said first direction for reducing the fuel supply to the engine, said actuation being effected upon an increase in said differential pressure over a high predetermined value, l. said governor further including a pressure liquid housing communicating with a source of pressure liquid, m. a chamber in said pressure liquid housing in which said first piston member is movable, n. a conduIt leading from a source of pressure liquid to said chamber, and o. a constant pressure control valve in said communication arranged to provide a substantially constant pressure in said chamber thereby actuating the first piston for producing said power bias to the spring device.

Claim 18

In a plant comprising a combustion engine and a fluid compressor driven by said engine, the combination comprising: a. a governor responsive to a differential between a predetermined low working fluid pressure and discharge pressure range of the compressor, b. said governor including a spring device, c. a fuel control member for said combustion engine operable between a maximum load full speed position and a reduced idle speed position, d. a first portion of said spring device being connected to said fuel control member, e. a first pressure liquid actuated member operable to actuate said first spring portion to move said fluid control member toward said full speed position in an increased speed direction, f. a second pressure fluid actuated member operable to actuate said first spring portion to move said fuel control member in reduced speed direction within said pressure range, g. a first valve means operable to open and closed positions for controlling the flow of fluid through the compressor within said pressure range, h. actuating means for said first valve means, i. means for applying liquid pressure on said actuating means in the opening direction of the first valve means, j. a second control valve means disposed in said governor and operable to supply pressure fluid to the actuating means for moving said compressor fluid flow valve to the closed position, k. a means disposed in said governor for activating the second control valve means.

Claim 19

In a plant comprising a combustion engine and a fluid compressor driven by said engine, the combination comprising: a. a governor responsive to a differential between a predetermined low working fluid pressure and discharge pressure range of the compressor, b. said governor including a spring device, c. a fuel control member for said combustion engine operable between a maximum load full speed position and a reduced idle speed position, d. a first portion of said spring device being connected to said fuel control member, e. a first pressure liquid actuated member operable to actuate said first spring portion to move said fluid control member toward said full speed position in an increased speed direction, f. a second pressure fluid actuated member operable to actuate said first spring portion to move said fuel control member in reduced speed direction within said pressure range, g. a first valve means operable to open and closed positions for controlling the flow of fluid through the compressor within said pressure range, h. actuating means for said first valve means, i. means for applying liquid pressure on said actuating means in the opening direction of the first valve means, j. a second control valve means disposed in said governor and operable to supply pressure fluid to the actuating means for moving said compressor fluid flow valve to the closed position, k. a means disposed in said governor for activating the second control valve means.