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System and method for running an engine in mobile liquid natural gas applications

A technology of engines and compressed natural gas, applied in the direction of machines/engines, engine components, combustion engines, etc., can solve problems such as undisclosed

Inactive Publication Date: 2014-08-27
CATERPILLAR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While the '730 patent discloses LNG and CNG holding reservoirs, the '730 patent fails to disclose a system that would help the engine acquire CNG more quickly regardless of weather conditions

Method used

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  • System and method for running an engine in mobile liquid natural gas applications
  • System and method for running an engine in mobile liquid natural gas applications

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Embodiment Construction

[0011] Reference will now be made in detail to the exemplary embodiments, which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.

[0012] figure 1 A schematic diagram of components of a fuel system according to one embodiment is shown. The dual fuel common rail fuel system 10 utilizes dual fuel common rail injectors 12 . The dual fuel system 10 includes a plurality of fuel injectors 12, where each fuel injector includes an injector body 70 having an injector body 70 positioned for injecting gaseous fuel and / or liquid fuel directly into an associated fuel injector. Tip member 71 in a corresponding combustion chamber of an engine cylinder (not shown). Diesel fuel source 14 contains diesel fuel. Diesel pump 16 draws diesel fuel through diesel supply line 18 ; pressurizes the diesel fuel; and delivers the pressurized diesel fuel to diesel fuel rail 20 . A filter...

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Abstract

The present disclosure is directed to a system for running an engine. The system includes a first tank, a second tank, a pump, a vaporizer, and a heat source. The first tank stores liquid natural gas (LNG). The pump is in communication with the first tank and is configured to pump the LNG from the first tank. The vaporizer is in communication with the pump. The vaporizer is configured to receive the LNG from the first tank via the pump and convert the LNG into compressed natural gas (CNG). The second tank is in communication with the vaporizer. The second tank is configured to store CNG. A heat source is in communication with the second tank. The heat source uses the stored CNG to apply heat to the vaporizer.

Description

technical field [0001] The present invention generally relates to systems and methods for operating engines in mobile LNG applications. Background technique [0002] Current mobile liquefied natural gas (LNG) applications use engine (cylinder) jacket cooling water as the vaporizer / heat source for vaporizing the LNG into compressed natural gas (CNG). This method can be problematic because there is no heat to power the carburetor until the engine is hot. As a result, operation with CNG necessitates waiting until the engine reaches its normal operating temperature. In cold winters such as in regions such as the Arctic Circle, such engines do not reach their operating temperature until a load is applied. This can lead to unnecessary delays before such systems can be brought into service at such temperature conditions. What is needed, therefore, are improved systems and methods that reduce the time that elapses before an engine is capable of operating on CNG under certain weat...

Claims

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Application Information

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IPC IPC(8): F17C7/04F17C9/02F17C7/02
CPCF02M31/02F02M21/0212F02M21/0215F02M21/06Y02T10/30
Inventor V·依瑞格莱迪D·H·吉布森
Owner CATERPILLAR INC