Diesel engine : Kromhout Gardner 4LW 1940

[ruben]

My compression gauge fits in place of the injector. It has a non-return valve as close to where the injector nozzle would be as possible so as not to affect the combustion chamber volume. The valve currently doesn’t seal as well as I would like.

In the video clip the pressure is reaching more than 40 bar but there was no clearance between the valves and the piston. I have since added a 0.5mm copper shim gasket which has reduced the pressure to 30-35 bar which is still sufficient for a cold start.

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I have used two different types of fuel feed pump. One is a diaphragm pump based on full size practice where the pressure is maintained by a spring.


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The other is an electric pump like you are thinking of using with a pressure relief valve mounted on the injection pump to allow the fuel to circulate. The pump is rated for 12V and delivers more than enough fuel with a 5V supply.

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hello Roger

there would be plans or measurements of the fuel pump that appears in the last photo

or how the fuel pump works