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Cold start for high octane fuel in diesel engine architecture

A technology of engines and engine cylinders, applied in the direction of incandescent ignition of engines, engine components, combustion engines, etc., can solve the problems of high initial cost and difficulty in starting diesel engines

Pending Publication Date: 2022-04-12
CLEARFLAME ENGINES INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition to having a higher initial cost than conventional SI engines, diesel engines are difficult to start in cold climates due to the thermal demands of MCCI operation, especially with low cetane fuels

Method used

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  • Cold start for high octane fuel in diesel engine architecture
  • Cold start for high octane fuel in diesel engine architecture
  • Cold start for high octane fuel in diesel engine architecture

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Embodiment Construction

[0011] Chemical fuels (petroleum, alcohols, biodiesel, etc.) are still important for heavy road transport. Their high energy density is important for users who need to travel long distances and refuel quickly. As a result, the demand for chemically fueled diesel engines will continue for decades. However, diesel fuel prices have risen substantially over the past three decades, and diesel fuel is a significant contributor to greenhouse gas emissions. In addition, for nitrogen dioxide and nitric oxide (collectively referred to as NO x ) and smoke emission standards are becoming more and more stringent.

[0012] The use of cleaner, low-carbon alternative fuels such as methanol, ethanol, dimethyl ether (DME) and natural gas has become increasingly common in the US energy sector over the past two decades. From 2000 to 2018, U.S. ethanol production increased tenfold from 1.6 billion gallons per year to 16.1 billion gallons. During the same period, natural gas production in the U...

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Abstract

Embodiments disclosed herein relate generally to systems and methods of operating an internal combustion (IC) engine, and more particularly to systems and methods of starting a compression ignition (CI) engine (i.e., "cold start") when the ambient environment is significantly lower than the normal operating temperature of the engine. In some embodiments, the CI engine may include an ignition assist. In some embodiments, a method of operating a CI engine during a cold start may include opening an intake valve to draw a volume of air into a combustion chamber; moving the piston from a bottom dead center position to a top dead center in the combustion chamber at a compression ratio of between about 15 and about 25; injecting a volume of fuel, the fuel having a cetane number of less than about 30; closing an intake valve; and burning substantially all of the volume of fuel.

Description

[0001] Cross References to Related Applications [0002] This application claims priority and benefit to U.S. Provisional Application No. 62 / 848,087, filed May 15, 2019, entitled "Cold-Start for High-Octane Fuels in a Diesel Engine Architecture," the entire disclosure of which is hereby Incorporated herein in its entirety by reference. Background technique [0003] Diesel engines, also known as Hybrid Controlled Compression Ignition (MCCI or CI) engines, are an important part of the energy sector, offering several advantages over spark ignition (SI) engines used in conventional gasoline vehicles. The CI design of diesel engines results in high efficiency and good torque / power density, while the robustness of the design enables these engines to have remarkable reliability and low maintenance million miles. Therefore, diesel engines are the best choice for long-distance, short-downtime situations. However, diesel engines are not without their drawbacks. In addition to havin...

Claims

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Application Information

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IPC IPC(8): F02D41/00F02D41/06F02D41/30F02D41/38F02D41/40F02B23/06F02D13/02F02D19/06
CPCF02D41/0007F02D2041/001F02D41/401F02D2200/0414F02D2200/0602F02D41/3827F02D41/3041F02D41/064F02B23/0657F02D19/0649F02D13/0219Y02T10/40Y02T10/12F02M26/13F02B9/04F02D13/0215F02D41/009F02P5/145F02P19/04F02P21/00F02P23/00F02B3/08F02B2201/064F02B2720/153F02D19/084
Inventor J·布鲁姆雷特B·约翰逊
Owner CLEARFLAME ENGINES INC
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