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Internal combustion engine for use with a pressurized low viscosity fuel

A technology for internal combustion engines and fuels, applied in fuel injection control, mechanical equipment, engine control, etc., can solve problems such as engine component damage, debris block blockage, fuel leakage, etc., to reduce maintenance costs, improve reliability, and increase safety sexual effect

Inactive Publication Date: 2013-07-17
VOLVO LASTVAGNAR AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One reason for this could be debris blocks getting stuck between the sealing surfaces of the leak protection valve
If such a blockage occurs, a large amount of fuel may leak down into the engine power cylinder
When attempting to start an engine in which such a leak has occurred, the amount of leaked fuel may ignite and cause overpressure and overtemperature in the affected cylinder, which may subsequently cause damage to various engine components

Method used

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  • Internal combustion engine for use with a pressurized low viscosity fuel
  • Internal combustion engine for use with a pressurized low viscosity fuel
  • Internal combustion engine for use with a pressurized low viscosity fuel

Examples

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Embodiment Construction

[0018] In the embodiment shown in FIG. 1 , an internal combustion engine 1 using pressurized low-viscosity fuel is equipped with a fuel system (not shown) for injecting a highly volatile fuel such as DME into the power cylinders of the engine. A temperature sensor 2 is installed in each individual exhaust port 3 of the engine, wherein the exhaust port 3 represents the gas flow path connected to each individual power cylinder of the engine. The sensor 2 is adapted to be read by the EMS 4, which controls the fuel injection system and the leak detection / starting system according to the invention. The engine is also equipped with a two-speed starting system, which includes a starter motor 5 and a starter motor controller 6 .

[0019] A preferred method of leak detection and safe engine start includes the steps of:

[0020] 1. Upon receiving an instruction from the driver to start the engine, activate the temperature measurement in the engine exhaust port performed by the temperat...

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PUM

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Abstract

An internal combustion, compression ignition engine for use with a pressurized low viscosity fuel includes an engine power cylinder with its associated gas flow path, a valve system for opening fluid communication between the engine power cylinder and the gas flow path, and an engine management system (EMS). The engine management system is adapted to provide a pre-starting mode in which an open fluid communication between the engine power cylinder and the gas flow path is established in such a manner that any fuel present inside said engine power cylinder is prevented from reaching the fuel ignition temperature for the fuel.

Description

technical field [0001] The present invention relates to the field of compression-ignition internal combustion engines using pressurized low-viscosity fuels, said internal combustion engines comprising engine-powered cylinders with gas flow paths associated therewith, and means for activating the engine-powered cylinders and said gas flow paths. The flow path is in fluid communication between the valve system, and the engine management system (EMS). The invention also relates to a method of operating a compression ignition internal combustion engine using pressurized low viscosity fuel. Background technique [0002] Non-fossil fuels are often used as an environmentally friendly alternative to conventional diesel fuel. High vapor pressure fuels such as dimethyl ether (DME) typically have a very low viscosity compared to conventional diesel fuel, so low that fuel can leak through a closed nozzle valve even if the sealing surface of the valve is not damaged. Furthermore, fuel ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/06F02D35/02
CPCF02D41/221F02D41/0025F02D41/062F02D2041/225F02D19/00F02D41/3076
Inventor 塞尔吉·尤达诺夫安尼卡·卡尔松
Owner VOLVO LASTVAGNAR AB