Abstract:
Operating a tractor with a front ground-engaging implement and a back ground-engaging implement includes calculating an error between a real-time pull-slip ratio and a target pull-slip ratio, and engaging the back ground-engaging implement with material of an underlying substrate to reduce the error. Related hardware and control logic are also disclosed.
Abstract:
A system having an engine is provided. The system includes a high pressure (HP) turbocharger and a low pressure (LP) turbocharger connected in series with each other. The system also includes a first valve assembly configured to selectively bypass at least a portion of the exhaust from the engine to the LP turbocharger. The system also includes a storage tank configured to store a pressurized fluid and configured to be in fluid communication with the HP turbocharger and the LP turbocharger. The system further includes a second valve assembly in fluid communication with the storage tank, the HP turbocharger and the LP turbocharger. The system also includes a controller operatively coupled to the first valve assembly and the second valve assembly. The controller is configured to selectively operate the first valve assembly and the second valve assembly based on a change in a load requirement on the engine.
Abstract:
A powertrain system for a machine includes a hydraulic variator assembly coupled with a mechanical transmission, and a speed balancing system including a hydraulic accumulator, and being configured to limit a speed balancing error between first and second variators in the variator assembly by commanding adjustment of a valve mechanism to fluidly connect a hydraulic accumulator with one of the variators to increase a fluid flow rate therethrough. The hydraulic accumulator can be charged by way of an implement system in a machine driven by way of the powertrain system.
Abstract:
A hybrid thermostat valve for a machine includes an inlet port, a first outlet port and a second outlet port. A sealing member located between the inlet port and the first outlet port includes holes providing a first channel of fluid communication between the inlet port and the first outlet port. A valve element located between the inlet port and the first outlet port selectively allows fluid communication between the inlet port and the first outlet port through the first channel. A bypass valve element located between the inlet port and the second outlet port selectively allows fluid communication between the inlet port and the second outlet port. Further, an actuator selectively controls position of the sealing member to provide a second channel of fluid communication between the inlet port and the first outlet port based on a current work cycle segment being performed by the machine.
Abstract:
A hybrid power train system for a tractor scraper is provided. The hybrid power train system may include a primary power source coupled to a first set of traction devices, a generator coupled to the primary power source, a first electric motor coupled to a second set of traction devices, an inverter circuit coupled to the generator and the first electric motor, an energy storage device coupled to the inverter circuit, and a controller operatively coupled to the inverter circuit. The controller may be configured to engage a first operation mode enabling electrical energy, supplied by the generator and the first electric motor, to be stored in the energy storage device, and engage a second operation mode enabling electrical energy, stored in the energy storage device, to be supplied to the first electric motor to drive the second set of traction devices.
Abstract:
A system for controlling a flow of a gas stream into a plurality of combustion chambers of an engine is provided. The system comprises a fuel reformer module configured to provide the flow of the gas stream containing hydrogen gas and carbon monoxide gas, a cooler module positioned downstream of the fuel reformer module with respect to the flow of the gas stream. The cooler module is configured to control a temperature of the gas stream. A flow control assembly is positioned downstream of the cooler module and upstream of the plurality of combustion chambers with respect to the flow of the gas stream. The flow control assembly is configured to supply a first effluent stream to a pre-chamber of the plurality of combustion chambers. The flow control assembly also supplies a second effluent stream to a main chamber of the plurality of combustion chambers.
Abstract:
An exhaust gas recirculation (EGR) system includes an EGR duct configured to effect fluid communication between an exhaust duct and an intake duct of an internal combustion engine; a heat exchanger having a first flow passage and a second flow passage, the first flow passage being in fluid communication with the EGR duct, the second flow passage being configured to receive a heat transfer medium from a heat transfer medium source; an upstream purge valve in fluid communication with the second flow passage of the heat exchanger, and configured to effect selective fluid communication between a purge fluid source and the second flow passage of the heat exchanger; and a controller operatively coupled to the upstream purge valve. The controller is configured to purge the second flow passage of the heat exchanger by opening the upstream purge valve.
Abstract:
A control system is disclosed for use with a powertrain of a machine. The control system may have a first sensor configured to generate a first signal indicative of an actual speed, a second sensor configured to generate second signal indicative of at least one of a force bearing on the machine and a position of an implement, and an interface device configured to generate a third signal indicative of a desired speed. The control system may also have a controller configured to determine a closed-loop gain value based on a difference between the actual and desired speeds, to classify a current operation of the machine based on the second signal, and to determine an open-loop gain value based on classification of the current operation. The controller may also be configured to control fueling of the machine based on a superposition of the closed-loop gain value and the open-loop gain value.
Abstract:
A gas regulator includes a first sensor adapted to monitor change in gas quality. A regulator valve is adapted to change a first pressure value present at an output of gas regulator. A second sensor is adapted to determine a regulator valve position. An actuator is adapted to change regulator valve position based on a second pressure value which is determined based on at least one of a type of a fuel, gas quality, multi-fuel engine operating conditions, fresh air pressure and temperature, a third pressure value and temperature value of fuels. A third sensor coupled downstream to the gas regulator, and is adapted to measure first pressure value. The gas regulator is in fluid communication with a switch valve which selectively allows at least one of the fuels therethrough. The actuator changes regulator valve position based on a comparison between second pressure value and first pressure value.
Abstract:
A system includes a first machine having a first bail member and a first push bar, at first end. The first bail member includes a first hydraulic cylinder. A first hook and second push bar, at second end. The second push bar includes a second hydraulic cylinder in fluid communication with first hydraulic accumulator. The second machine having second bail member and first push bar, at first end. The second bail member includes third hydraulic cylinder in fluid communication with second hydraulic accumulator. A second hook and second push bar, at second end. The second push bar includes fourth hydraulic cylinder. The first hook coupled to second bail member and second push bar of first machine is in mechanical contact with first push bar of second machine. The impact energy generated at beginning of push operation and pull operation is stored in first hydraulic accumulator and second hydraulic accumulator respectively.