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圖表工業公司，國際燃氣設備工程公司，已經發布了一個設備，可以添加或加裝圖表LNG（液化天然氣）汽車燃料系統以確保相容性優化的加油站各種發動機技術，包括火花點火（ SI）和壓縮點火（CI）的柴油發動機，間接（CI-IDI）和直接（CI-DI）注射。

此前，LNG燃料站，需要在兩個不同的壓力和飽和溫度提供LNG支持SI和CI-IDI，以及CI-DI，發動機，驅動燃料站基礎設施的復雜性和成本。大多數發動機需要相對低的壓力，并利用一個圖表開發的系統，將燃料從站來的車輛通常高于100 psi和將關聯的飽和溫度的200o年F.這使得簡化的車輛燃料系統，它不需要額外的復雜性，如泵向發動機的燃料輸送到一個板上的車輛。CI-DI與主板上的泵工作更好地與寒冷的燃料使用燃油系統柴油發動機。卸載和分配不飽和更冷的燃料通過燃料站提供液化天然氣的車輛通常小于60磅的-215o樓圖表相關的燃料飽和溫度，提供加油站設計有效地提供兩種燃料飽和條件。

設計圖新的車載“冷燃油壓力生成器”（CPB）接受冷的燃料小于60磅（飽和），并一貫支持大多數發動機的壓力要求。體外循環，連同現有的圖表LNG汽車燃料系統，安全可靠地工作和車輛運行和加油過程中以最小的放空機會。此功能可以簡化燃料站的設計和可靠的SI發動機運行獨立的LNG燃料站能力。

à的體外循環配備圖表LNG汽車燃料系統，將操作只是因為它現在當它接收到飽和的液化天然氣（通常為100磅以上）從燃料站。如果它收到較低的壓力（飽和溫度）的冷的燃料，從燃料站，體外循環會自動提升的車輛油箱中的壓力（和溫度），以可靠地滿足發動機的壓力要求。

體外循環結合圖表LNG汽車燃料系統，最大限度地減少排放和降低相關的成本較高，需要冷燃料替代液化天然氣燃料系統。此外，體外循環維持目前所有的功能和圖表現有LNG汽車燃料系統的好處，如延長保持時​​間和消除排氣或在加油過程中排放的甲烷排放量。

“圖表創建的的LNG系統解決方案，優化的燃油站和船上的燃油系統，已被證明是簡單可靠，最大限度地減少甲烷排放的風險。湯姆·凱里，圖表D＆S集團總裁表示，“新CPB進一步方便可靠，成本低，實施燃料站業主，汽車制造商和車隊運營商受益。

Chart Industries, Inc., an international gas equipment engineering company, has released a device that can be added or retrofitted to Chart LNG (liquefied natural gas) vehicle fuel systems which ensures compatibility with fuel stations optimized for various engine technologies, including Spark Ignition (SI) and Compression Ignition (CI) diesel engines with both Indirect (CI-IDI) and Direct (CI-DI) Injection.

Previously, LNG fuel stations were required to deliver LNG at two different pressures and saturation temperatures to support SI and CI-IDI, as well as CI-DI, engines, driving fuel station infrastructure complexity and cost. Most engines require comparatively low pressure and utilize a Chart developed system that delivers fuel from the station to the vehicle typically above 100 psi and a related saturation temperature of -200o F. This enables a simplified vehicle fuel system, which does not require additional complexity, such as an on-board vehicle pump to deliver fuel to the engine. Diesel engines with CI-DI use fuel systems with on-board pumps that operate better with colder fuel. Offloading and dispensing unsaturated colder fuel through a fuel station delivers LNG to the vehicle at typically less than 60 psi and a related fuel saturation temperature of -215o F. Chart provides fuel station designs which effectively deliver both fuel saturation conditions.

Chart’s new on-board vehicle “Cold-Fuel Pressure Builder” (CPB) is designed to accept cold fuel (saturated at less than 60 psi) and consistently support most engine pressure requirements. The CPB, together with existing Chart LNG vehicle fuel systems, will work safely and reliably and with minimized chance of venting during both vehicle operation and refuelling. This feature enables simplified fuel station design and reliable SI engine operation independent of LNG fuel station capability.

A CPB equipped Chart LNG vehicle fuel system will operate just as it does now when it receives saturated LNG (typically above 100 psi) from a fuel station. If it receives lower pressure (and saturation temperature) cold fuel from the fuel station, the CPB automatically raises the pressure (and temperature) of the vehicle fuel tank to reliably meet the engine’s pressure requirements.

The CPB, combined with the Chart LNG vehicle fuel system, minimizes emissions and reduces the higher cost associated with alternative LNG fuel systems requiring cold fuel. In addition, the CPB maintains all the current features and benefits of Chart’s existing LNG vehicle fuel system, such as extended hold time and elimination of venting or fugitive methane emissions during refuelling.

“Chart created the LNG system solution of optimized fuel stations and on-board fuel systems that has proven to be simple and reliable and minimizes the risk of methane emissions. The new CPB further facilitates reliable, low cost implementation benefiting fuel station owners, vehicle manufacturers and fleet operators,” stated Tom Carey, Chart D&S Group President.