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Article
Publication date: 16 July 2018

Alfonso Mendoza-Velazquez, José Antonio Santillana, Viviana Elizabeth Zárate-Mirón and Martha Cabanas

The purpose of this study is to investigate labor congestion in the automotive industry in Mexico.

Abstract

Purpose

The purpose of this study is to investigate labor congestion in the automotive industry in Mexico.

Design/methodology/approach

By using the cluster and subcluster definitions by Delgado et al. (2016) and relying on an efficiency and production function perspective, this study estimates a standard production function and measures marginal returns of labor at the regional cluster and subclusters levels. To assess whether wages affect the finding of congestion and productivity, the model also measures the individual impact of wages on both total productivity and marginal returns of labor.

Findings

Among other results, this paper finds evidence of labor congestion in the automotive cluster in Mexico. This congestion deepens with wages and it is specific to some regions and some subclusters.

Research limitations/implications

The methods used are based on panel data techniques but are fundamentally cross-section in nature. The time period available may condition these findings.

Originality/value

To the authors’ knowledge, this is the first study reporting congestion in the automotive cluster in Mexico.

Details

Competitiveness Review: An International Business Journal, vol. 28 no. 4
Type: Research Article
ISSN: 1059-5422

Keywords

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Article
Publication date: 3 January 2017

Peter Hooper

The purpose of this paper is to present results of practical experience of cold starting a gasoline engine on low volatility fuel suitable for unmanned aerial vehicle…

Abstract

Purpose

The purpose of this paper is to present results of practical experience of cold starting a gasoline engine on low volatility fuel suitable for unmanned aerial vehicle (UAV) deployment.

Design/methodology/approach

Experimental research and development is carried out via dynamometer testing of systems capable of achieving cold start of a spark ignition UAV engine on kerosene JET A-1 fuel.

Findings

Repeatable cold starts have been satisfactorily achieved at ambient temperatures of 5°C. The approximate threshold for warm engine restart has also been established.

Practical implications

For safety and supply logistical reasons, the elimination of the use of gasoline fuel offers major advantages not only for UAVs but also for other internal combustion engine-powered equipment to be operated in military theatres of operation. For gasoline crankcase-scavenged two-stroke cycle engines, this presents development challenges in terms of modification of the lubrication strategy, achieving acceptable performance characteristics and the ability to successfully secure repeatable engine cold start.

Originality/value

The majority of UAVs still operate on gasoline-based fuels. Successful modification to allow low volatility fuel operation would address single fuel policy objectives.

Details

Aircraft Engineering and Aerospace Technology, vol. 89 no. 1
Type: Research Article
ISSN: 1748-8842

Keywords

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Article
Publication date: 3 October 2019

Jing Shao, Shuo Huang, Isaac Lemus-Aguilar and Enes Ünal

Although China can be considered an early adopter of the circular economy, there are few studies of remanufacturing business models (BMs) in the context of the Chinese…

Abstract

Purpose

Although China can be considered an early adopter of the circular economy, there are few studies of remanufacturing business models (BMs) in the context of the Chinese automobile industry. The purpose of this paper is to investigate viable BMs, summarizes current obstacles and anticipates future development opportunities and directions.

Design/methodology/approach

The cross-case analysis considers the roles of value networks and of customer value proposition and interface in circular business models (CBMs) by examining the strategies and tactical measures of two leading remanufacturers. The data are collected from semi-structured interviews, documents, etc.

Findings

The analysis identifies the following components of viable BMs of remanufacturers: reclaiming raw material, managing used components, producing new products and marketing. Several current obstacles are summarized from four perspectives: policy barriers and insufficient government support; consumer awareness; related product quality; and technology. The study also identifies future directions and opportunities for the automobile parts remanufacturing industry.

Originality/value

This study contributes to the CBM literature by mapping the barriers and opportunities in remanufacturing. The results have shed some light into the field of sustainability in manufacturing firms by empirically testing the theoretical model. The results will help managers to design viable CBMs in different contexts.

Details

Journal of Manufacturing Technology Management, vol. 31 no. 3
Type: Research Article
ISSN: 1741-038X

Keywords

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Article
Publication date: 1 April 1973

C.A. Perkins

AUTOMOTIVE engine designers will know that the oil film in a plain bearing system has three duties: it converts energy into heat, supports the load, and separates the…

Abstract

AUTOMOTIVE engine designers will know that the oil film in a plain bearing system has three duties: it converts energy into heat, supports the load, and separates the relatively moving surfaces.

Details

Industrial Lubrication and Tribology, vol. 25 no. 4
Type: Research Article
ISSN: 0036-8792

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Article
Publication date: 14 September 2015

Nehal S. Ahmed, Hamdy S. Abdel-Hameed, Ahmed F. El-Kafrawy and Amal M. Nassar

The aim of this paper is to solve the problem of carbonaceous deposits in automotive engines by preparing different ashless detergent/dispersant additives based on…

Abstract

Purpose

The aim of this paper is to solve the problem of carbonaceous deposits in automotive engines by preparing different ashless detergent/dispersant additives based on propylene oxide (PO) and different amines. Carbonaceous deposits in automotive engines are the major problems associated with oil aging. Efficient detergents and dispersants have been used to solve this problem, particularly in lubricating oils.

Design/methodology/approach

The structures of the prepared compounds were confirmed using Fourier transform infrared spectroscopy (FT-IR), proton nuclear magnetic resonance (1H-NMR) and gel permeation chromatography (GPC) for determination of molecular weight. This was followed by the evaluation of the prepared compounds such as detergent/dispersant and antioxidants additives for lubricating engine oil using several techniques such as variation of viscosity ratio, change in total acid number, optical density using infrared techniques, spot method, determination of sludge and determination the potential detergent dispersant efficiency (PDDE).

Findings

All the prepared compounds were found to be soluble in lubricating oil. The efficiency of the prepared compounds such as antioxidant and detergent/dispersant additives for lubricating oil was investigated. It was found that the additives have excellent power of dispersion, detergency and the most efficient additives such as antioxidant those prepared by using n,n-dimethyloctadecylamine (NDOA) and di-n-butyl dithio phosphoric acid.

Practical implications

The paper includes preparation of new compounds from the reaction of propoxylated amines and different organic acids and evaluates them as detergent/dispersant and antioxidants additives by using several techniques.

Originality/value

This paper fulfils an identified need to prepare new compounds from the reaction of propoxylated amines and different organic acids and evaluates them as additives by using different methods. All were found to have better efficiency as compared with commercial additives.

Details

Industrial Lubrication and Tribology, vol. 67 no. 6
Type: Research Article
ISSN: 0036-8792

Keywords

Content available
Article
Publication date: 1 October 1998

David Margaroni

Abstract

Details

Industrial Lubrication and Tribology, vol. 50 no. 5
Type: Research Article
ISSN: 0036-8792

Keywords

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Article
Publication date: 1 June 2002

Russell Sion and John Atkinson

A new sensor has been developed which will enable engine pressure data to be available at a cost suitable for the average production vehicle. Unlike many previous devices…

Abstract

A new sensor has been developed which will enable engine pressure data to be available at a cost suitable for the average production vehicle. Unlike many previous devices this sensor will be suitable for the harsh environmental conditions of production vehicles themselves and not just the test environment. The sensor is small, extremely rugged and has a sufficiently wide bandwidth to be easily able to detect engine problems such as pre‐ignition, miss‐fire and malfunctioning engine components. Furthermore, the patented sensor technology does not require expensive electronic interfaces, but can use simple low‐cost off the shelf components. The sensor's performance and limitations are discussed, based on real data from a single cylinder petrol engine. An analysis of the sensor output signals, showing both time and frequency domain data under varying load conditions, is also included.

Details

Sensor Review, vol. 22 no. 2
Type: Research Article
ISSN: 0260-2288

Keywords

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Article
Publication date: 1 April 1992

Gh.M. Negoita and V.V. Canciu

A mathematical tool for the fuzzy identification of a system is presented. This hybrid mathematical method combines the fuzzy description of input space and the…

Abstract

A mathematical tool for the fuzzy identification of a system is presented. This hybrid mathematical method combines the fuzzy description of input space and the description of input‐output relations using the Bézier interpolation technique. This is a computationally simple method for designing a curve(surface). Its efficiency is expressed in its powerful application in controlling the shape of a described curve (surface), both simplifying the determination of the parameters of input‐output relations, qualititively by precision and quantitatively by decreasing the number of control points (values) required. Shows an application of the method to computer‐aided identification of the steady‐state operating points of a thermal engine.

Details

Kybernetes, vol. 21 no. 4
Type: Research Article
ISSN: 0368-492X

Keywords

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Article
Publication date: 1 June 1986

G.J. DAVIES, D.R. EASTHAM and B.J. EASTWOOD

This paper is concerned with three types of bearing applications:

Abstract

This paper is concerned with three types of bearing applications:

Details

Industrial Lubrication and Tribology, vol. 38 no. 6
Type: Research Article
ISSN: 0036-8792

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Article
Publication date: 1 December 1997

Bill Wilson

Discusses the properties of various asbestos‐free gasket materials, in particular expanded PTFE. Presents the factors which need to be taken into account when choosing a…

Abstract

Discusses the properties of various asbestos‐free gasket materials, in particular expanded PTFE. Presents the factors which need to be taken into account when choosing a gasket. Highlights the requirements of gaskets in the automotive industry and the conditions they have to withstand.

Details

Industrial Lubrication and Tribology, vol. 49 no. 6
Type: Research Article
ISSN: 0036-8792

Keywords

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