Isilinganiso sobubanzi kuya kububanzi

Lena indaba ebaluleke kakhulu esigabeni sokuklama injini, okuyisilinganiso sokushaywa kwepiston kuya kububanzi bepiston, okubuye kubizwe ngokuthi isilinganiso se-stroke-diameter.
Ngokuvamile, izinjini ezinesivinini esikhulu zisebenzisa ama-piston amakhulu anemivimbo emifushane, futhi izinjini ezinejubane eliphansi zisebenzisa ama-piston amancane anemivimbo emikhulu.
Nokho, ukukhethwa kwesilinganiso sobubanzi bobubanzi kufanele kucabangele injongo yokuklama yenjini kanye nomgomo wokuthuthukisa ukusebenza.

Umthelela we-piston stroke ekusebenzeni kwenjini

Ngokungaguquguquki kwesivinini senjini kanye nokushaywa kwe-stroke, isivinini se-piston esimaphakathi sizokwenyuka ngokulinganayo.
Isivinini se-piston esimaphakathi siyipharamitha ebalulekile ekhombisa izinga lokuqina kwenjini.
Izinkinga ezibangelwa ukwanda kwesivinini se-piston yilezi:
1. Ukulahleka kokungqubuzana kuyanda, futhi ukusebenza kahle kwemishini kuyehla; umthwalo oshisayo womhlangano we-piston uyakhula, futhi ukumelana nokushisa okuphezulu kanye nomthamo omkhulu wamafutha kuyadingeka;
2. Amandla angasebenzi ayanda, futhi ukudlidliza kwemishini nomsindo kuyanda;
3. Njengoba i-air inlet kanye ne-exhaust flow rate ikhula, ukumelana ne-air inlet kuba kukhulu, okuzonciphisa ukusebenza kahle kwamandla emali.

Umthelela wobubanzi bepiston ekusebenzeni kwenjini

I-diameter enkulu ye-piston izokwandisa umthwalo oshisayo wamasilinda enjini, ama-piston, amakhanda angama-cylinder, ama-valve nezinye izingxenye.
Izinjini zikaphethiloli zinqunyelwe ngokungqongqoza, futhi ububanzi besilinda ngokuvamile abudluli ku-100mm. Awukho umkhawulo ophansi we-cylinder diameter yenjini kaphethiloli.
Ububanzi besilinda bezinjini zikadizili ngokuvamile buphakathi kuka-80 no-160 mm.

Ukukhethwa kwendlela eya ku-diameter ratio

Isilinganiso sobubanzi nobubanzi bezinjini zikaphethiloli ezinesivinini esikhulu ngokuvamile siphakathi kuka-0.7 no-1.0.
Isilinganiso sobubanzi nobubanzi bezinjini zikadizili ngokuvamile siphakathi kuka-1.05 no-1.2. Izinga lokucindezelwa kwenjini kadizili liphezulu kanti i-piston stroke yinde.