Renze
Elite Member
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ACERT Technology represents a series of evolutionary and incremental improvements developed by Caterpillar. For example:
* The fuel system allows for multiple injections each combustion cycle. Small amounts of fuel are injected at precise times to achieve the combined goals of fuel economy and lower emissions.
* An advanced air system provides more cool air in the combustion chamber. A wastegate turbocharger provides excellent low-end response. In addition, crossflow cylinder heads provide a direct path of air to the engine.
Caterpillar engineers worked with approximately 125 variables to find the optimum balance. There are more than 10 million possible combustion combinations. Those engineers were challenged by the highly intertwined relationship of (1) reduced emissions, (2) engine performance, (3) fuel efficiency and (4) engine durability. Those are not necessarily complimentary objectives. Improving emissions, for example, can have an adverse effect on fuel efficiency. Their overriding goal is no different than the goal Caterpillar has had since its inception—to provide customers with the lowest owning and operating costs, and the lowest cost per unit of material moved.
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So this whole ACERT technology is nothing more than an ordinary common rail injection system with multiple injections ?
From Wikipedia:
"Common rail engines have been used in marine and locomotive applications for some time. The Cooper-Bessemer GN-8 (circa 1942) is an example of a hydraulically operated common rail diesel engine, also known as a modified common rail."
and:
"The common rail system prototype was developed in the late 1960s by Robert Huber of Switzerland. After that, the technology was further developed by Dr. Marco Ganser at the Swiss Federal Institute of Technology in Zurich, later of Ganser-Hydromag AG (est.1995) in Oberägeri. In the mid-1990s, Dr. Shohei Itoh and Masahiko Miyaki, of the Denso Corporation, a Japanese automotive parts manufacturer, developed the common rail fuel system for heavy duty vehicles and turned it into practical use on their ECD-U2 common-rail system, which was mounted on the Hino Rising Ranger truck and sold for general use in 1995."
Because of this general American mindset, these trucks come with Cummins engines and an "american truck corporation" badge on your side of the pond... Under the flag of Terex, they couldnt get any army orders in America so Terex sold the company to private investors. They are popular in the Middle East, where it can be 40°C plus during the day, and -5° during the night.
In the 1st gulf war, the US army also used the Tatra's of the Saudi's to cross the deserts
The amount of genuine "Yankee Diesels" are near extinction: Detroit is ditching old American designs and gets building Mercedes-Benz truck engines from this year on (which are sold WITH MB transmissions from the Brazil MB plant) Navistar ? is building a MAN clone, and the "new" Paccar MX motor started its life in the mid 90's on a test bench about 150 km from where i live, in the DAF truck plant in Eindhoven, the Netherlands. Oh, and Volvo isnt a North American brand actually, main parts are designed in sweden
Cummins is still building SOME Yankee Diesels, but the smaller ones, 4.5 and 6.75 liter engines, are a joint development with Iveco of Italy.
Sorry for this rude awakening, but as much as we Europeans rely on fuel from American oil companies, you guys depend more and more on us Europeans for engine technology, because many cant keep up the pace...
ACERT Technology represents a series of evolutionary and incremental improvements developed by Caterpillar. For example:
* The fuel system allows for multiple injections each combustion cycle. Small amounts of fuel are injected at precise times to achieve the combined goals of fuel economy and lower emissions.
* An advanced air system provides more cool air in the combustion chamber. A wastegate turbocharger provides excellent low-end response. In addition, crossflow cylinder heads provide a direct path of air to the engine.
Caterpillar engineers worked with approximately 125 variables to find the optimum balance. There are more than 10 million possible combustion combinations. Those engineers were challenged by the highly intertwined relationship of (1) reduced emissions, (2) engine performance, (3) fuel efficiency and (4) engine durability. Those are not necessarily complimentary objectives. Improving emissions, for example, can have an adverse effect on fuel efficiency. Their overriding goal is no different than the goal Caterpillar has had since its inception—to provide customers with the lowest owning and operating costs, and the lowest cost per unit of material moved.
============================================================
So this whole ACERT technology is nothing more than an ordinary common rail injection system with multiple injections ?
From Wikipedia:
"Common rail engines have been used in marine and locomotive applications for some time. The Cooper-Bessemer GN-8 (circa 1942) is an example of a hydraulically operated common rail diesel engine, also known as a modified common rail."
and:
"The common rail system prototype was developed in the late 1960s by Robert Huber of Switzerland. After that, the technology was further developed by Dr. Marco Ganser at the Swiss Federal Institute of Technology in Zurich, later of Ganser-Hydromag AG (est.1995) in Oberägeri. In the mid-1990s, Dr. Shohei Itoh and Masahiko Miyaki, of the Denso Corporation, a Japanese automotive parts manufacturer, developed the common rail fuel system for heavy duty vehicles and turned it into practical use on their ECD-U2 common-rail system, which was mounted on the Hino Rising Ranger truck and sold for general use in 1995."
Builder said:With the chips down in the middle of a war, I'll take my old Yankee diesels over the euro diesels 24/7.
Because of this general American mindset, these trucks come with Cummins engines and an "american truck corporation" badge on your side of the pond... Under the flag of Terex, they couldnt get any army orders in America so Terex sold the company to private investors. They are popular in the Middle East, where it can be 40°C plus during the day, and -5° during the night.
In the 1st gulf war, the US army also used the Tatra's of the Saudi's to cross the deserts
The amount of genuine "Yankee Diesels" are near extinction: Detroit is ditching old American designs and gets building Mercedes-Benz truck engines from this year on (which are sold WITH MB transmissions from the Brazil MB plant) Navistar ? is building a MAN clone, and the "new" Paccar MX motor started its life in the mid 90's on a test bench about 150 km from where i live, in the DAF truck plant in Eindhoven, the Netherlands. Oh, and Volvo isnt a North American brand actually, main parts are designed in sweden
Cummins is still building SOME Yankee Diesels, but the smaller ones, 4.5 and 6.75 liter engines, are a joint development with Iveco of Italy.
Sorry for this rude awakening, but as much as we Europeans rely on fuel from American oil companies, you guys depend more and more on us Europeans for engine technology, because many cant keep up the pace...
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