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Viewing 1 to 30 of 107
2013-09-24
Technical Paper
2013-01-2439
Eldon Brasche
Since 1992, Caterpillar has invested millions of dollars to purchase CAD software, and spends nearly $2M per year keeping its engineers up-to-date, via instructor lead training (ILT), as new enhancements are introduced. Periodic upgrades to the software also require huge resource (people, costs) commitments for the planning and execution of the training requirements required for a large global workforce. This paper will examine gaps uncovered in the efficiency and effectiveness of the current training process, and the cultural change required as a result of switching from an instructor led environment to a completely web-based solution, which, once deployed, had promised to change the way Caterpillar approached training for the future. The proposed change promised to improve human resource capability by utilizing new technological capabilities, and resulted in improvements in organizational capabilities as well.
2013-09-24
Technical Paper
2013-01-2434
Keshav Sud, Sabri Cetinkunt, Scott Fiveland
This paper uses a one-dimensional (1-D) simulation based approach to compare the steady state and transient performance of a Split Cycle Clean Combustion (SCCC) diesel engine to a similarly sized conventional diesel engine. Caterpillar Inc's one-dimensional modeling tool “Dynasty” is used to convert the simulation model of Caterpillar's current production turbocharged diesel engine Cat® C4.4 (used in their Hydraulic Excavator 316) to operate on the SCCC cycle. Steady state and transient engine performance is compared between the two engine variants. This study is focused only on the performance aspects of engine and relies on the other independently published papers for emissions prediction. This paper also demonstrates the use of Caterpillar's proprietary modeling software Dynasty to replicate the two cylinder SCCC engine model presented by University of Pisa in their paper [2].
2016-04-05
Technical Paper
2016-01-0571
Guillaume Bernard, Mark Scaife, Amit Bhave, David Ooi, Julian Dizy
Abstract Internal combustion (IC) engines that meet Tier 4 Final emissions standards comprise of multiple engine operation and control parameters that are essential to achieve the low levels of NOx and soot emissions. Given the numerous degrees of freedom and the tight cost/time constraints related to the test bench, application of virtual engineering to IC engine development and emissions reduction programmes is increasingly gaining interest. In particular, system level simulations that account for multiple cycle simulations, incylinder turbulence, and chemical kinetics enable the analysis of combustion characteristics and emissions, i.e. beyond the conventional scope of focusing on engine performance only. Such a physico-chemical model can then be used to develop Electronic Control Unit in order to optimise the powertrain control strategy and/or the engine design parameters.
2015-04-14
Technical Paper
2015-01-1693
Mark Allen, Graham Hargrave, Petros Efthymiou, Viv Page, Jean-Yves Tillier, Chris Holt
Abstract It is an engineering requirement that gases entrained in the coolant flow of an engine must be removed to retain cooling performance, while retaining a volume of gas in the header tank for thermal expansion and pressure control. The main gases present are air from filling the system, exhaust emissions from leakage across the head gasket, and also coolant vapour. These gases reduce the performance of the coolant pump and lower the heat transfer coefficient of the fluid. This is due to the reduction in the mass fraction of liquid coolant and the change in fluid turbulence. The aim of the research work contained within this paper was to analyse an existing phase separator using CFD and physical testing to assist in the design of an efficient phase separator.
2015-09-29
Technical Paper
2015-01-2851
Aleksandar Egelja, Darren Allan Blum, Kalpesh N. Patel
Abstract Many off-highway machines, including hydraulic excavators, perform cyclical motion in their everyday activities where there is significant acceleration, deceleration, load lifting and hydraulic implement lowering. During that time in conventional off-highway machinery, most of the potential or kinetic energy is dissipated as heat instead of being captured and reused. When these opportunities are well understood and consequently machine systems are designed and integrated properly, fuel efficiency improvements could reach double digit values. It should be noted that the mentioned machine efficiency improvements will still vary depending on the machine size, its application and the characteristics of machine system(s) being applied. An approach for excavator energy flow analysis, coupled with rapid machine control design changes directed to minimization of energy losses is discussed.
2014-04-01
Journal Article
2014-01-1246
D. Ryan Williams, Chad Koci, Scott Fiveland
Driven by the desire to implement low-cost, high-efficiency NOx aftertreatment systems, such as Three Way Catalysts (TWC) or Lean NOx Traps (LNT), a novel 6-Stroke engine cycle was explored to determine the feasibility of implementing such a cycle on a compression ignition engine while continuing to deliver fuel efficiency. Fundamental questions regarding the abilities and trade-offs of a 6-stroke engine cycle were investigated for near-stoichiometric and lean operation. Experiments were performed on a single-cylinder 15-liter (equivalent) research engine equipped with flexible valvetrain and fuel injection systems to allow direct comparison between 4-stroke and 6-stroke performance across multiple hardware configurations. 1-D engine simulations with predictive combustion models were used to support, iterate on, and explore the 6-stroke operation in conjunction with the experiments.
2002-05-06
Technical Paper
2002-01-1718
Imad A. Khalek, Terry L. Ullman, Shirish A. Shimpi, Cleophas C. Jackson, Bennett Dharmawardhana, William M. Silvis, Norbert Kreft, R. Neal Harvey, Dave Munday, Yutaka Yamagishi, Rob Graze, John Smitherman, Jesse Adkins
The use of a partial flow sampling system (PFSS) to measure nonroad steady-state diesel engine particulate matter (PM) emissions is a technique for certification approved by a number of regulatory agencies around the world including the US EPA. Recently, there have been proposals to change future nonroad tests to include testing over a nonroad transient cycle. PFSS units that can quantify PM over the transient cycle have also been discussed. The full flow constant volume sampling (CVS) technique has been the standard method for collecting PM under transient engine operation. It is expensive and requires large facilities as compared to a typical PFSS. Despite the need for a cheaper alternative to the CVS, there has been a concern regarding how well the PM measured using a PFSS compared to that measured by the CVS. In this study, three PFSS units, including AVL SPC, Horiba MDLT, and Sierra BG-2 were investigated in parallel with a full flow CVS.
2002-03-04
Technical Paper
2002-01-1281
Dave Schweikert, Charlie Groeller, William Klein, Dave Reynolds, Dennis Sitek, Scott Saathoff
The swivel-type hinge mount specified in SAE J180 has been the standard alternator mounting for many years. However, in the mid-1990's on-highway applications began to experience vibration related failures due to casting excitation. This led to the eventual development of a stationary “pad mount” system in combination with an automatic belt tensioner. This paper will review the system component life and benefits of pad mount, and proposes an industry mounting standard for further application usage.
2008-06-19
Article
Front differential lock, load-sensing hydraulics, and a new ACERT engine highlight Caterpillar’s new 938H wheel loader and IT38H integrated toolcarrier. The locking differentials are designed to provide dependable tractive effort in poor underfoot or tough loading conditions, and the load-sensing hydraulics can help both loaders deliver improved cycle times. Additional features help to aid machine health monitoring and service.
2008-01-18
Article
Caterpillar has acquired the assets of Blount’s Forestry Division, and in a separate transaction, six Cat dealers agreed in principle to acquire certain assets of Pioneer Machinery, a distributor of forestry products in the southeastern U.S.
2008-06-19
Article
Cat has taken advantage of advances of both price and size in powerful semiconductors to provide its newly announced D7E track-type tractor with a brushless ac-electric-drive system. The D7E will ramp up in production and roll out into regulated markets next year, with the DR7 it is replacing to eventually be discontinued in North America.
2008-07-10
Article
Caterpillar offers undercarriage systems to propel machinery over various terrains and through operational challenges.
2008-07-08
Article
Undercarriage propel systems from Caterpillar provide hydraulic power and electronic controls for track motion control and were designed for improved performance when integrated with the company’s undercarriage models.
2008-06-19
Article
One of the most unusual aspects of Caterpillar's upgraded M series motor graders was replacing the steering wheel and other controls with a joystick, reducing operator motion by 78%. The design features over 100 patents.
2008-06-19
Article
Caterpillar has introduced three new C-Series multi-terrain loaders that feature an open, modular undercarriage designed for maximum durability, low ground pressure, and easy maintenance, along with enhanced machine controls and an electronic torque management system.
2008-06-19
Article
Caterpillar’s new 345D L hydraulic excavator features more available power, efficient hydraulics with heavy-lift mode and hydraulic cross sensing, and a comfortable, expanded operator station. With a long undercarriage, 6.9-m (22.6-ft) heavy-duty reach boom, and 750-mm (30-in) track shoes, the 345D L is a direct replacement for the 345C L.
2008-06-19
Article
Emissions regulations are prompting changes in the backup generation market. Suppliers in all ranges of the gen-set market are rolling out efficient, clean-running stationary engines.
2008-06-19
Article
Caterpillar Inc. and Claycrete Ltd. signed a marketing agreement to provide a roadway and pad construction solution to operators of mines and oil and gas sites as well as to owners and builders of unpaved and paved roads.
2008-06-19
Article
Caterpillar Inc., Mitsubishi Heavy Industries Ltd. (MHI), and Shin Caterpillar Mitsubishi Ltd. (SCM) signed definitive agreements that include a share redemption plan that will result in Caterpillar owning 67% of SCM.
2008-01-16
Article
The word “big” takes on a whole new meaning when it is used to describe Caterpillar’s new 993K wheel loader. Built on an all-new platform, the 993K features Z-bar linkage, improved hydraulics, and an upgraded powertrain for solid penetration into the pile and high breakout forces. According to Cat, the increased performance and capacity result in a 15 to 20% improvement in productivity compared to the 992G this vehicle replaces.
2011-11-16
Article
Caterpillar Inc. plans to build a mining truck facility in Batam, Indonesia, to produce a range of chassis and bodies that will be shipped to customers throughout Asia-Pacific. Chairman and CEO Doug Oberhelman announced the growth plans for mining at the 2011 Asia-Pacific Economic Cooperation (APEC) Summit “because much of the global demand for commodities today is being driven by the positive economic growth and development that is taking place in the growth markets of the Asia-Pacific region.”
2011-11-06
Article
Cat says it talked to customers and non-customers to learn what they needed in next-generation wheel feller bunchers.
2011-09-05
Article
The new 349E, powered by a 396 net hp (291 kW) C13 ACERT diesel, delivers more engine and hydraulic power than its 345D predecessor, while consistently averaging 5% improved fuel efficiency in typical applications.
2011-12-08
Article
Steel is a staple in the design of heavy-duty equipment and vehicles that carry heavy loads for a living. But that doesn’t mean these machines can’t stand to shed a few pounds here and there, especially if it means increasing fuel efficiency or upping payload capacity at no penalty to durability. That's exactly what Caterpillar is pursuing.
2011-12-16
Article
Caterpillar Inc. plans to build a new, $150 million engine manufacturing facility in India that will produce Perkins-branded 4000 Series engines. A company spokesman told SAE Off-Highway Engineering that Caterpillar is “still not in a position to publically announce the location of the new facility,” and he declined to share the plant’s expected production volume.
2012-01-09
Article
Long-term operation with B20 at the current specification limits for alkali and alkaline earth metal impurities can adversely impact the performance of DOC, DPF, and SCR systems.
2012-03-16
Article
The rapid evolution of sensors, processors, and software is making unmanned ground vehicles viable in applications as diverse as mining and battlefields.
2012-02-21
Article
New Tier 4 engines, hydrostatic drive systems, and Z-bar loader linkages are some of the features that Caterpillar has designed into its next-generation wheel loaders.
2012-02-14
Article
As Chief Technology Officer and Vice President with responsibility for the Product Development & Global Technology Division, Tana L. Utley has been focused on solving the technical challenges of reducing diesel engine emissions in accordance with U.S. EPA and equivalent global regulations.
2012-04-13
Article
Functionality cannot be compromised inside heavy trucks, but their cabs increasingly mesh practicality with passenger-car sensibilities for comfort and ambience.
Viewing 1 to 30 of 107

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