The first post-World War I example of direct gasoline injection was on the Hesselman engine invented by Swedish engineer Jonas Hesselman in 1925.
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A Hesselman engine is basically a spark-ignition engine, converted to run on heavier petroleum products such as oil, kerosene or diesel oil.
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Hesselman engines use the ultra lean-burn principle; fuel is injected toward the end of the compression stroke, then ignited with a spark plug.
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Hesselman engines were produced by all three Swedish truck manufacturers of its day, Scania-Vabis, Tidaholms Bruk and Volvo, from the late 1920s.
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The "'Hesselman engine "'is a hybrid between a petrol engine and a Diesel engine introduced by gasoline injection on a spark-ignition engine used to power a road going vehicle.
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Hesselman engines used the ultra lean burn principle and injected the fuel in the end of the compression stroke and then ignited it with a spark plug, it was often started on gasoline and then switched over to run on diesel or kerosene.
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Hesselman engines used the ultra-lean-burn principle and injected the fuel in the end of the compression stroke and then ignited it with a spark plug, it was often started on gasoline and then switched over to run on diesel or kerosene.
