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Boru Jia

Beijing Institute of Technology

5 South Zhongguancun street

Center for Energy and Environmental Policy Researc

Beijing, 100081

China

SCHOLARLY PAPERS

20

DOWNLOADS

755

TOTAL CITATIONS

4

Scholarly Papers (20)

Enhancing Energy Efficiency of Free-Piston Engine Generator Through the Controllable Cycle Method: Analysis of Energy Gain and Consumption

Number of pages: 62 Posted: 14 Dec 2024
Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology and Beijing Institute of Technology
Downloads 52 (1,060,784)
Citation 1

Abstract:

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Controllable cycle, free-piston engine generator, energy efficiency, energy gain-consumption, dynamic cycle control

Enhancing Energy Efficiency of Free-Piston Engine Generator Through the Controllable Cycle Method: Analysis of Energy Gain and Consumption

Number of pages: 24 Posted: 22 Jun 2024
Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology and Beijing Institute of Technology
Downloads 31 (1,341,098)

Abstract:

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Controllable cycle, free-piston engine generator, energy efficiency, energy gain-consumption, dynamic cycle control.

2.

Performance Analysis of a Free Piston Linear Generator: Integrated Simulation with Thermodynamic and Electromagnetic Coupled Modelling

Number of pages: 36 Posted: 23 Dec 2024
Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology and Beijing Institute of Technology
Downloads 70 (875,328)

Abstract:

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Free piston engine, Permanent magnet linear generator, Integrated simulation, Response Surface Methodology, Performance analysis

Effects of Injection Strategies on Combustion and Emission Characteristics of a Free Piston Engine Generator Fueled with Gasoline-Ethanol Blends during Cold Start and Warm-up

Number of pages: 34 Posted: 25 Nov 2025
Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology and Beijing Institute of Technology
Downloads 36 (1,267,060)

Abstract:

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ethanol、Free Piston Engine Generator、Cold start、Combustion process、Emission performance、Injection parameter

Effects of Injection Strategies on Combustion and Emission Characteristics of a Free Piston Engine Generator Fueled with Gasoline-Ethanol Blends during Cold Start and Warm-up

Number of pages: 34 Posted: 03 Dec 2025
Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology and Beijing Institute of Technology
Downloads 33 (1,311,254)

Abstract:

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ethanol、Free Piston Engine Generator、Cold start、Combustion process、Emission performance、Injection parameter

Bi-objective Bayesian Optimization for Multi-variable Performance Enhancement of Non-uniform Thermoelectric Generators

Number of pages: 26 Posted: 11 Oct 2025
Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, affiliation not provided to SSRN, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, affiliation not provided to SSRN and Beijing Institute of Technology
Downloads 31 (1,341,098)

Abstract:

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TEG, zero-dimensional model, Bayesian Optimization, Structural optimisation

Bi-objective Bayesian Optimization for Multi-variable Performance Enhancement of Non-uniform Thermoelectric Generators

Number of pages: 29 Posted: 23 Oct 2025
Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, affiliation not provided to SSRN, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, affiliation not provided to SSRN and Beijing Institute of Technology
Downloads 20 (1,500,232)

Abstract:

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TEG, zero-dimensional model, Bayesian Optimization, Structural optimisation

5.

Optimization Research on Scavenging Characteristics of a Dual-Cylinder Free-Piston Engine Generator: Based on Continuous Experimental Test Results

Number of pages: 31 Posted: 04 Jan 2023
Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology and Durham University
Downloads 51 (1,052,702)

Abstract:

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Key words: Free piston linear engines, intake pressure, stroke-to-bore ratio, scavenging process, scavenging efficiency

6.

Revolutionizing Wearable Power Generation: Integrating Dual Heat Sources for Enhanced Power Output and Durability of Flexible Stretchable Thermoelectric Generators

Number of pages: 22 Posted: 25 Nov 2023
Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology and Beijing Institute of Technology
Downloads 46 (1,121,190)

Abstract:

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Flexibility, Stretchability, Power Generation, Thermoelectric Generators, Wearable Electronics

7.

Transient Dynamic Cycle Evolution and Thermodynamic Performance Analysis of a Free-Piston Engine Generator

Number of pages: 28 Posted: 26 Aug 2024
Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology and Beijing Institute of Technology
Downloads 43 (1,145,425)

Abstract:

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Free-piston engine, linear generator, dynamic evolution, thermodynamic performance, stable operation

Memory Effect of External Charging Strategies on Carbon-Based Supercapacitors and Their Self-Discharge Inhibition Effect

Number of pages: 20 Posted: 18 Jul 2024
Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology and Beijing Institute of Technology
Downloads 20 (1,500,232)

Abstract:

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Supercapacitor, Self-discharge, External charging strategy, EIS analysis, Pore volume

Memory Effect of External Charging Strategies on Carbon-Based Supercapacitors and Their Self-Discharge Inhibition Effect

Number of pages: 20 Posted: 25 Sep 2024
Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology and Beijing Institute of Technology
Downloads 20 (1,500,232)

Abstract:

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Supercapacitor, Self-discharge mitigation, Charging strategy, Electrochemical impedance spectroscopy, Pore volume

Zero-Carbon and Carbon Neutral Fuels Applied on a Linear Range Extender with Multi-Fuel Adaptability

Number of pages: 32 Posted: 30 Dec 2024
Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology and Beijing Institute of Technology
Downloads 24 (1,445,011)

Abstract:

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Linear range extender, Semi-analytical method, performance prediction, Zero-carbon fuels, Carbon neutral fuels

Zero-Carbon and Carbon Neutral Fuels Applied on a Linear Range Extender with Multi-Fuel Adaptability

Number of pages: 26 Posted: 27 May 2024
Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology and Beijing Institute of Technology
Downloads 16 (1,548,841)
Citation 2

Abstract:

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Linear range extender, Semi-analytical method, Performance prediction, Zero-carbon fuels, Carbon neutral fuels

10.

Demonstration of an Advanced Rectification Strategy on a Linear Generator for Better Electricity Quality

Number of pages: 37 Posted: 22 May 2024
Beijing Institute of Technology, affiliation not provided to SSRN, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, affiliation not provided to SSRN, affiliation not provided to SSRN and Beijing Institute of Technology
Downloads 32 (1,290,922)

Abstract:

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Free piston internal combustion linear power generation system, Uncontrolled rectification, PWM rectification, Model prediction, Sliding mode control

11.

Cold Start Characteristics at Misplaced Ignition Strategy on the First Firing Cycle of a Dual Cylinder Linear Range Extender

Number of pages: 36 Posted: 31 Dec 2024
Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology and Beijing Institute of Technology
Downloads 31 (1,304,549)

Abstract:

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Linear range extender, Cold start characteristics, Misplaced ignition strategy, Cold start performance, Cold start optimization

12.

Exploring the Turbulent Jet Ignition Concept for Free Piston Engine Generator Application: Simulation Approach with Validation Results

Number of pages: 39 Posted: 16 Jan 2025
affiliation not provided to SSRN, Tianjin University, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology and affiliation not provided to SSRN
Downloads 30 (1,318,317)

Abstract:

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Free piston engine generators, Turbulent jet ignition, Scavenging Progress, Combustion Progress, Indicated thermal efficiency

13.

Generation Characteristics and Power Quality Control of a Free Piston Linear Generator Considering System Uncertainty

Number of pages: 50 Posted: 03 Mar 2025
Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology and Beijing Institute of Technology
Downloads 29 (1,332,057)

Abstract:

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Free piston linear generator, Generation characterization, Controlled rectification, Active disturbance rejection control, Model predictive control

14.

Numerical Investigation of the Impact of Dual Spark Plug Coordinated Ignition Strategy on the Combustion Process in a Free Piston Engine Generator

Number of pages: 42 Posted: 12 Sep 2023
affiliation not provided to SSRN, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology and Beijing Institute of Technology
Downloads 29 (1,332,057)

Abstract:

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Free piston engine generators, Dual spark plugs, Flame propagation, Combustion progress, NOx emission

15.

Research on the Implementation of Free Piston Engine Generator at Various Compression Ratios and Combustion Performance of Multiple Fuels

Number of pages: 29 Posted: 30 Aug 2024
Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology and Beijing Institute of Technology
Downloads 28 (1,345,526)

Abstract:

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compression ratios、multi fuel、Gasoline、ethanol、n-Propanol、Combustion performance

16.

Numerical Investigation on the Cold-Start/Restart Process of a Linear Range Extender for Faster Response

Number of pages: 27 Posted: 25 Mar 2024
Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology and Beijing Institute of Technology
Downloads 24 (1,399,036)
Citation 1

Abstract:

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free-piston liner range extender system, the cold start process, different cylinder wall temperature, cylinder wall heating.

17.

Study on the Combustion and Emission Characteristics of an Ethanol-Gasoline Fueled Free Piston Engine Generator Based on Optimized In-Cylinder Fuel-Air Mixing

Number of pages: 39 Posted: 02 Feb 2026
Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology and Beijing Institute of Technology
Downloads 17 (1,481,165)

Abstract:

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Gasoline/Ethanol、Pre-Injection Strategy、Emission Characteristics、Combustion Performance

18.

Investigation on the Oscillation Characteristics and Performance Prediction of a Linear Range Extender: An Analytical and Numerical Combined Method

Number of pages: 23 Posted: 10 May 2024
Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology and Beijing Institute of Technology
Downloads 16 (1,491,251)

Abstract:

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Linear range extender, Semi-analytical method, Vibration, Performance prediction, Dynamic characteristics, Rapid response model

19.

Assessment of Fluid-structure interactions for Free Piston Linear Engine: the effect of cooling channel layout

Number of pages: 35 Posted: 31 Jan 2026
Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology and Beijing Institute of Technology
Downloads 14 (1,518,554)

Abstract:

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Free Piston Linear Engine, Cooling channel layout, Flow uniformity, Structural stability

Optimization of a linear integrated starter/generator for low detent force based on destructive interference

Number of pages: 49 Posted: 29 May 2026
Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology and Beijing Institute of Technology
Downloads 9 (1,614,412)

Abstract:

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Linear integrated starter/generator, Linear range extender, Detent force minimization, Destructive interference, Surrogate model optimization

Optimization of a linear integrated starter/generator for low detent force based on destructive interference

Number of pages: 49 Posted: 04 Jun 2026
Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology, Beijing Institute of Technology and Beijing Institute of Technology
Downloads 3

Abstract:

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Linear integrated starter/generator, Linear range extender, Detent force minimization, Destructive interference, Surrogate model optimization