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Research Papers: Internal Combustion Engines

Research on Phase Synchronization Strategies for Diesel Engines to Startup Quickly

[+] Author and Article Information
Weijun Ren

School of Information Engineering,
Chang'an University,
Xi'an 710064, China
e-mail: renweijunxa@126.com

Zifeng Wu

AECOM,
1999 Avenue of the Stars,
Los Angeles, CA 90067
e-mail: wuzi620@gmail.com

Rong Yang

School of Information Engineering,
Chang'an University,
Xi'an 710064, China
e-mail: 2507028234@qq.com

1Corresponding author.

Contributed by the IC Engine Division of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received April 19, 2016; final manuscript received September 25, 2016; published online January 10, 2017. Assoc. Editor: Stani Bohac.

J. Eng. Gas Turbines Power 139(5), 052801 (Jan 10, 2017) (7 pages) Paper No: GTP-16-1144; doi: 10.1115/1.4035227 History: Received April 19, 2016; Revised September 25, 2016

Valid and quick phase synchronization is essential to diesel engine operation, with impacts on the starting time and emissions. This paper presents an innovative wheel shape of camshaft with four long teeth and four short teeth, which plays a fundamental role in the proposed phase synchronization strategies. A dynamic validity-check algorithm of camshaft and crankshaft sensor signals is developed as a premise. Specifically, the segment pattern matching method is used in the rapid phase synchronization strategy that is applicable given valid camshaft and crankshaft signals. A combination of trial injections and the pattern matching method is applied when either the camshaft or crankshaft sensor signal is missing in the limp home mode. Bench test results showed that phase synchronization could be realized within 180 crankshaft angles, and that the phase synchronization strategies in the limp home mode were feasible.

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References

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Figures

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Fig. 1

Mechanism and signal of the crankshaft and camshaft

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Fig. 2

Dynamic check of crankshaft sensor signal

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Fig. 3

Crankshaft sensor position estimation state machine

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Fig. 4

State machine of phase synchronization coordinator

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Fig. 5

Phase synchronization with pattern matching

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Fig. 6

Phase synchronization with trial injections

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Fig. 7

Segment structure of the four cylinders

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Fig. 8

Phase synchronization with crankshaft signal failure

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Fig. 9

Test scenario of phase synchronization strategies

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Fig. 10

Chart of phase synchronization testing

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