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The Development of Direct Injection Gasoline Engines

Xiyan Gao

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Abstract

The research and development of a small type direct injection spark-ignition engine test bed is introduced. The design of electronic-controlled fuel injection system is presented in detail. The newly-developed common rail-valve-nozzle type injector uses the characteristics of HSV that is easily numeric-controlled to adjust the injection parameters. The minimum fuel delivery per cycle reaches 0.9mg. The test results at idle speed show that direct-injection gasoline engine is superior to carburetor engine in fuel consumption, NO_X and HC emissions.

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What this paper is about

The research and development of a small type direct injection spark-ignition engine test bed is introduced. The design of electronic-controlled fuel injection system is presented in detail. The newly-developed common rail-valve-nozzle type injector uses the characteristics of HSV that is easily numeric-controlled to adjust the injection parameters. The minimum fuel delivery per cycle reaches 0.9mg. The test results at idle speed show that direct-injection gasoline engine is superior to carburetor engine in fuel consumption, NO_X and HC emissions.

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Available abstract

The research and development of a small type direct injection spark-ignition engine test bed is introduced. The design of electronic-controlled fuel injection system is presented in detail. The newly-developed common rail-valve-nozzle type injector uses the characteristics of HSV that is easily numeric-controlled to adjust the injection parameters. The minimum fuel delivery per cycle reaches 0.9mg. The test results at idle speed show that direct-injection gasoline engine is superior to carburetor engine in fuel consumption, NO_X and HC emissions.

Key concepts: Automotive engineering, Fuel injection, Nozzle, Injector, Gasoline direct injection, Valve timing, Idle, Petrol engine

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