The diesel engine (also known as a compression-ignition or CI engine), named after Rudolf Diesel, is an internal combustion engine in which ignition of the fuel is caused by the elevated temperature of the air in the cylinder due to the mechanical compression (adiabatic compression). This contrasts with spark-ignition engines such as a petrol engine (gasoline engine) or gas engine (using a gaseous fuel as opposed to petrol), which use a spark plug to ignite an air-fuel mixture.
Diesel engines work by compressing only the air. This increases the air temperature inside the cylinder to such a high degree that atomised diesel fuel injected into the combustion chamber ignites spontaneously. With the fuel being injected into the air just before combustion, the dispersion of the fuel is uneven; this is called a heterogeneous air-fuel mixture. The torque a diesel engine produces is controlled by manipulating the air ratio; instead of throttling the intake air, the diesel engine relies on altering the amount of fuel that is injected, and the air ratio is usually high.
The diesel engine has the highest thermal efficiency (engine efficiency) of any practical internal or external combustion engine due to its very high expansion ratio and inherent lean burn which enables heat dissipation by the excess air. A small efficiency loss is also avoided compared to two-stroke non-direct-injection gasoline engines since unburned fuel is not present at valve overlap and therefore no fuel goes directly from the intake/injection to the exhaust. Low-speed diesel engines (as used in ships and other applications where overall engine weight is relatively unimportant) can reach effective efficiencies of up to 55%.Diesel engines may be designed as either two-stroke or four-stroke cycles. They were originally used as a more efficient replacement for stationary steam engines. Since the 1910s they have been used in submarines and ships. Use in locomotives, trucks, heavy equipment and electricity generation plants followed later. In the 1930s, they slowly began to be used in a few automobiles. Since the 1970s, the use of diesel engines in larger on-road and off-road vehicles in the US has increased. According to Konrad Reif, the EU average for diesel cars accounts for half of newly registered cars.The world's largest diesel engines put in service are 14-cylinder, two-stroke watercraft diesel engines; they produce a peak power of almost 100 MW each.
Unitrans Tanzania Limited has the following exciting opportunity at Kilombero and Kilosa Districts, Morogoro Region where is subcontracted for various agricultural operations to the sugar industry.
We are currently looking for a suitably qualified, and experienced individuals to fill in the...
Nyota wa Filamu za Fast & Furious, Vin Diesel amefunguliwa mashtaka ya Unyanyasaji wa Kijinsia dhidi ya Asta Jonasson, Mwanamke aliyewahi kuwa Msaidizi wake mwaka 2010.
Mwanamke huyo amedai Septemba 2010 wakati wakirekodi vipande vya Filamu ya Fast Five aliitwa chumbani kwa Diesel akiwa peke...
Serikali iangalie ifanye jambo kuhusu Mradi wa SGR hali inapoelekea sio nzuri, wakati wafanyakazi wenzetu wakipambana na Mkandarasi Yapi Merkezi kuhusu kuondolewa kazini, huku sisi ambao bado tupo kwenye uhakika wa ajira tupotupo tu.
Mchongo upo hivi, kwa siku kadhaa sasa kazi zimesimama...
Nataka kununua Volkswagen Golf ya diesel (2.0 TDI GT DSG) ya mwaka 2007 ya Uingereza. Naombaeni ushauri kwa ambaye ana ujuzi wa gari hizi haswa kwenye upande wa maintanance na changamoto zake kama imezidi 120K miles. Je ni reliable na nnaweza nikawa nnasafiri nayo masafa marefu?
Wanajamvi
Taharuki ya kuadimika kwa mafuta ya Petrol na Diesel imeanza tena kama ilivyo ada kila ukifika mwisho wa mwezi
Leo tarehe 27.09.2023 Urambo Tabora Hali si shwari misururu ya madumu kweli sheli yameanza
Inasiktikisha sana kuona wananchi wakiteseka namna hii na serikali tushindwa...
Nishati ya mafuta ya vyombo vya moto imeadimika na kuuzwa hadi elfu nane kwa lita moja huko Ifakara, Wilaya ya Kilombero.
Huko Rudewa pia nishati hiyo inauzwa hadi elfu tano kwa lita na hayapatikani!
Pamoja na gharama yake kuwa kubwa, ajabu, bado nishati hiyo haipatikani na kumeshuhudiwa...
Kutokana na gharama za mafuta kupanda juu. OKEMI technical services tumekuja na huduma ya kufunga mfumo wa gas fuel kwenye magari yote yanayo tumia diesel na petrol
Gas fuel ina gharama nafuu kwa kulinganisha petrol na diesel, kwa kutumia gas fuel system unaweza kupunguza gharam za manunuzi ya...
Kutokana na gharama za mafuta kupanda juu. OKEMI technical services tumekuja na huduma ya kufunga mfumo wa gas fuel kwenye magari yote yanayo tumia diesel na petrol
Gas fuel ina gharama nafuu kwa kulinganisha petrol na diesel, kwa kutumia gas fuel system unaweza kupunguza gharam za manunuzi ya...
Ndugu wadau kutokana na mgao wa umeme unaoendelea hapa nchini usikubali biashara zako zisimame tunazo standby power diesel generator kwa affordable price kuanzia Kva 10 na kuendelea.PERKINS, YANMAR, LISTER PETER
Wengi wanaamini Utawala wa nchi Jirani utakuwa kama ule wa Mwamba wa East Africa Shujaa Magufuli lakini siyo.
Serikali ya Wanyonge ya Shujaa Magufuli ni tofauti kabisa na hii bottom up ya Dr William.
Naangazia hapa Citizen tv majirani kutoka UDA wanalalamikia Bei ya Petrol na Diesel Kupanda...
Bei ya diesel kwa mara ya kwanza duniani (hapa kwetu) ipo juu kuliko petrol.
Bila shaka lengo ni kuwapa wepesi boda boda na wenye vi IST waache kumpigia mbuzi kelele.
Ngoma ipo kwa wasafirishaji bidhaa na watu.
Tulipo sasa, kwa hakika tunauhitaji sana ubinadamu wa kila mtu akiwamo serikali...
Uchunguzi wangu mdogo inaonyesha kwamba kwa mwezi huu wa Mei
Dar
✅Petrol ni Sh. 3100+
✅Diesel Sh 3200+
Nairobi ✅Petrol 144+ Ksh=2884Tsh
✅Diesel 125.5= 2503Tsh.
Mombasa ✅Petrol Ksh. 142=2850Tsh
✅Diesel Ksh. 123=2463Tsh
Bado sijaelewa sababu ya hii difference ilihali wote tunasingizia vita ya...
hizi bei zimeanza kutuchoma kama pasi wenye vipato vya kawaida
hali ipo vipi kwa Kenyatta huko?
Petrol 3,148 tshs / 157.66 kshs >>> 3,361 tshs / 168.3 kshs
Disel 3,258 tshs / 163.2 kshs >>> 3,390 tshs / 169.78 kshs
When Jenni Hannant’s boiler packed up, she tried the usual trick to get it going again: banging the pump, pressing the red button and expecting it to kick back in. When it still wouldn’t start, and she called a plumber for advice, they told her to check the oil tank that powers her Norfolk home...
Habari ya uzima ndugu zangu?
Nimewaza sanaaa hili jambo,maana naona namna mwananchi wa chini kiuchumi anavyoendelea kuminywa kupitia ongezeko la mafuta.
Ni miezi miwili imepita madereva mkoani Mbeya walikuwa wanakimbilia Zambia kununua mafuta,maana ni bei nzuri kuliko kwetu. Au ndio...
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