Re: direct injection?

Posted by K.B.-826 on December 20, 2006 at 17:39:07 from (71.10.83.242):

In Reply to: direct injection? posted by karl f on December 19, 2006 at 19:15:55:

Yes, the 407 was direct injected. The 361 which the 407 was based off of was the first direct injected engine IH used in a farm tractor, which would have been in 1963 in the 806. The 407 was last used in 1971 in the 1456. After that, they went to the 414/436/466 style engine and the old 361/407 was killed off. The old 361/407 was an exellent engine, but is complicated and expensive to work on compared to the 414/436/466. Not sure if the two-cylinder Deere diesels were direct injected, I know the 3010/4010 were in 1960. So yes, direct injection has been around in farm tractors for about 50 years. Today, most of the big high-tech farm tractor engines have four valves per cylinder and an injector is located in the center. All six injectors are fed low-pressure fuel through a common passage. The injector is operated off the camshaft through a pushrod/rocker arm. This action allows for injection pressures of over 20,000 psi. An electric soleniod controled by the computer controls the amount of fuel/timing by closing off/opening a passage between the injector and the fuel return passage. Compared to these engines, an old 407 looks pretty crude.

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