A comparison between methods for fuel delivery on demand

Conventional misfire diagnosis techniques are based on the analysis of the instantaneous engine speed. Although they have proved their efficiency in some operating conditions and detecting total misfires, their performance could be insufficient shortly. This paper presents a comparative study of different alternative detection principles to detect slight unevenness between cylinders in the injection process for a turbocharged Diesel engine.

The selected techniques are the instantaneous exhaust manifold pressure, the fast turbocharger speed and the mean temperature at the exhaust mobile petrol pump. All alternative methods show improved performance and linearity than the conventional one, particularly at high engine speed and low load. All these techniques are compared with the traditional approach, and the main advantages and disadvantages are discussed.

Residual generation and statistical pattern recognition for engine diagnostics

Methods and apparatus for on-demand fuel delivery are disclosed herein. An example method includes predicting, by executing an instruction with a processor, a vehicle usage event for a vehicle. The anticipated vehicle usage event is associated with a fuel amount. The example method includes comparing a fuel level of the vehicle and the fuel amount. The example method includes automatically generating, via the processor, a refuel request for the vehicle based on the comparison and transmitting the diesel delivery India request to a mobile device. The refuel request is to be viewable via a user interface at the mobile device.

A fuel delivery and control system is provided including a dual pump fluid circuit configuration comprising a fixed positive displacement pump sized to supply the main engine burn flow ranging from above windmill through the cruise, a positive displacement actuation pump including a variable pressure regulator, wherein the actuation pump is sized to supply fluid to engine actuators, valves and other hydraulically operated engine components and a pump flow sharing system interconnecting the two pumps.

The two pumps' combined flow is sufficient to meet the engine flow demand for windmill relight and maximum flow conditions. During cruise or normal operating conditions, the pumps operate in completely isolated flow circuits, minimizing recirculation and heat input into the fuel supply system.

A fuel delivery and control system for a gas turbine engine having a maximum fuel flow requirement and a steady-state requirement that is less than the full fuel flow requirement and also including a fuel metering unit, the fuel delivery on demand near me and control system comprising: a fixed displacement actuation pump of a size capable of providing a first portion of the maximum fuel flow requirement of the engine.

The pump having an inlet and an outlet; a variable pressure regulator in fluid communication with the outlet of the actuation pump, the variable regulator capable of adjusting the pressure drop across the inlet and the outlet of the actuation pump to maintain a minimum discharge pressure; and a fixed displacement main pump of a size configured to provide a second portion of the maximum fuel flow requirement of the engine, the main pump having an outlet in fluid communication with the fuel metering unit and in selective fluid communication with the outlet of the actuation pump, wherein the fuel delivery on demand and control system is configurable between an isolated pumps mode wherein the outlets of each of the actuation pump and the main pump are separated from each other and a shared pumps mode wherein the outlets of each of the actuation pump and the main pump are in fluid communication with each other to combine the first portion of the maximum fuel flow of the engine with the second portion of the full fuel flow of the engine and wherein the combined flow is supplied to the fuel metering unit of the machine.

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Created on Jan 28th 2021 06:59. Viewed 241 times.

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