Jonas Hesselman (9 April 1877- 20 December 1957) was a Swedish

engineer Engineers, as practitioners of engineering, are professionals who Invention, invent, design, build, maintain and test machines, complex systems, structures, gadgets and materials. They aim to fulfill functional objectives and requirements while ...

. He built the first spark ignition engine with direct injection of fuel into the cylinder.

Biography

Knut Jonas Elias Hesselman was born at Å församling in

Östergötland Östergötland (; English exonym: East Gothland) is one of the traditional provinces of Sweden (''landskap'' in Swedish) in the south of Sweden. It borders Småland, Västergötland, Närke, Södermanland and the Baltic Sea. In older English li ...

, Sweden. He was the son of factory owner Bror August Hesselman and Marie Louise Hesselman, née Åberg. He was the brother of professor Henrik Hesselman (1874–1943) and linguist Bengt Hesselman (1875–1952). Hesselman graduated in 1899 from

KTH Royal Institute of Technology KTH Royal Institute of Technology (), abbreviated KTH, is a Public university, public research university in Stockholm, Sweden. KTH conducts research and education in Institute of technology, engineering and technology and is Sweden's largest te ...

, Department of Mechanics. He worked from 1899 to 1916 for AB Diesel Engines (later Atlas Diesel, now

Atlas Copco Atlas Copco (''Copco'' from Compagnie Pneumatique Commerciale) is a Swedish multinational industrial company that was founded in 1873. It manufactures industrial tools and equipment. The Atlas Copco Group is an industrial corpration with headq ...

) in Sickla in

Nacka Nacka () is the municipal seat of Nacka Municipality and part of Stockholm urban area in Sweden. The municipality's name harks back to a 16th-century industrial operation established by the Crown at Nacka farmstead where conditions for water mi ...

just outside

Stockholm Stockholm (; ) is the Capital city, capital and List of urban areas in Sweden by population, most populous city of Sweden, as well as the List of urban areas in the Nordic countries, largest urban area in the Nordic countries. Approximately ...

, from 1901 as Head of Construction. Here he also developed

Rudolf Diesel Rudolf Christian Karl Diesel (, ; 18 March 1858 – 29 September 1913) was a German inventor and mechanical engineer who invented the Diesel engine, which burns Diesel fuel; both are named after him. Early life and education Diesel was born on 1 ...

's engine further and won international recognition as an authority on

diesel engine The diesel engine, named after the German engineer Rudolf Diesel, is an internal combustion engine in which Combustion, ignition of diesel fuel is caused by the elevated temperature of the air in the cylinder due to Mechanics, mechanical Compr ...

s. In 1916 he opened his own factory and in 1925 presented the

Hesselman engine The Hesselman engine is a hybrid between a petrol engine and a diesel engine. It was designed and introduced in 1925 by Sweden, Swedish engineer Jonas Hesselman. In a Hesselman engine, fuel is not injected during the suction stroke along with th ...

, a hybrid between an

Otto engine The Otto engine is a large stationary single-cylinder internal combustion engine, internal combustion four-stroke engine, designed by the German Nicolaus Otto. It was a low-RPM machine, and only fired every other stroke due to the Otto cycle, a ...

and diesel engine. Jonas Hesselman also designed electrical vehicle components, among others, the motor that became the basis for Hesselman Elhydraulik, now Haldex AB. In 1970, Hesselman Elhydraulik developed the hydraulic power unit that still serves as the prototype for the existing lifts for trucks. Jonas Hesselman was a resident of "Villa Hesselman" at Storängen outside

. The villa was designed in 1906 by architect

Albin Brag Karl Gustaf Albin Brag (January 30 ،1878, near Söderköping − December 23 ،1937, Stockholm) was a Sweden, Swedish architect. Life and work He completed his primary schooling in Jönköping in 1897. From 1898 to 1902, he studied at the KTH R ...

(1878-1937). He lived here until his death in 1957.

References

Other sources

* (Translated title: ''Vehicle history of

Scania Scania ( ), also known by its native name of Skåne (), is the southernmost of the historical provinces of Sweden, provinces () of Sweden. Located in the south tip of the geographical region of Götaland, the province is roughly conterminous w ...

1891-1991'') *Lundeberg, Erik (1931) ''Hesselmanmotorn som bilmotor'' (Stockholm: Dædalus)

External links

Haldex website
* 1877 births 1957 deaths People from Norrköping Municipality KTH Royal Institute of Technology alumni Swedish engineers Members of the Royal Swedish Academy of Sciences History of the diesel engine Manufacturing company founders {{Sweden-engineer-stub

Biography

See also

References

Other sources

External links