| 词条 | Toyota KD engine |
| 释义 |
|image=Toyota 1KD-FTV Engine 01.JPG |name=KD engine |manufacturer=Toyota Motor Corporation |production=2000- |configuration= Straight-4 |valvetrain=DOHC 4 valves x cyl. |predecessor=Toyota KZ engine Toyota L engine |successor=Toyota GD engine |fueltype=Diesel |fuelsystem=Common rail Direct injection |coolingsystem=Water-cooled |compression=17.4:1-18.5:1 |displacement={{convert|2494-2982|cc|L|1|disp=flip|abbr=on}} |power={{convert|75-140|kW|hp PS|0|abbr=on}} |torque={{convert|200-420|Nm|lbft|0|abbr=on}} }} The Toyota KD engine series is a diesel engine produced by Toyota which appeared in 2000. 1KD-FTV{{unreferenced section|date=October 2011}}First appearing in 2000, the 1KD-FTV is one of the newest engines built by Toyota. The 1KD-FTV is a {{convert|2982|cc|L|1|disp=flip|abbr=on}} straight-4 common rail D-4D (Direct injection 4-stroke common-rail Diesel) diesel engine with a variable nozzle turbocharger (VNT) and Intercooler. It has 16 valves and a double overhead camshaft (DOHC) design. Bore and stroke is {{convert|96x103|mm|2|abbr=on}}. It generates {{convert|127|kW|hp PS|0|abbr=on}} at 3400 rpm, and {{convert|352|Nm|lbft|0|abbr=on}} of torque at 1800-3400 rpm depending on target market and emission specifications. In some markets, outputs are {{convert|127|kW|hp PS|abbr=on|0}}/{{convert|410|Nm|lbft|abbr=on|0}} and {{convert|140|kW|hp PS|abbr=on|0}}/{{convert|420|Nm|lbft|abbr=on|0}}.{{cn|date=February 2014}} Redline of this engine is at 4200 RPM. Compression ratio is 17.9:1. This engine uses Toyota's D-4D Common Rail fuel injection technology operating at ultra high pressures of up to {{convert|1350|bar|psi|abbr=on}} which is about 8 times more than the pressure of conventional fuel injection systems within a "common rail" that feeds the injectors on all four cylinders. This is combined with a 32-bit ECU which controls fuel quantity, valve timing, and boost pressure at different engine parameters resulting in best fuel economy and also full utilization of power during acceleration. Pilot injection is also utilized by the common rail fuel system to smooth engine operation. Small amounts of fuel are introduced into the combustion chamber prior to the main injection event, reducing lag time and promoting more continuous and complete combustion. Exterior and interior engine noise is also reduced. The 1KD engine produces 17% more power with 11% less fuel consumption than its predecessor, the 1KZ engine. This engine was first used in Toyota Land Cruiser Prado, 3rd Generation Hilux Surf and now used in the Toyota Fortuner, Hiace and Toyota Hilux. 2KD-FTVAppearing in 2001, the 2KD-FTV is the 2nd generation of the KD series of engine with a smaller {{convert|2494|cc|L|1|disp=flip|abbr=on}} displacement. The displacement of this engine is based on the previous 2L engine. Bore remains the same {{convert|92|mm|2|abbr=on}} but stroke is increased to {{convert|93.8|mm|2|abbr=on}}. It has 16 valves and is a DOHC engine with a turbocharger and intercooler. It produces {{convert|75|kW|hp PS|0|abbr=on}} at 3400 rpm and {{convert|26.5|kgm|abbr=on|0}} of torque at 1600-2400 rpm with 4 speed Automatic ECT transmission without intercooler and {{convert|200|Nm|lbft|abbr=on|0}} of torque at 1600-3600 rpm with manual transmission without intercooler and {{convert|88|kW|hp PS|0|abbr=on}} at 3400 rpm and {{convert|325|Nm|lbft|abbr=on|0}} of torque at 1600-3600 rpm for the intercooled version. Toyota Thailand, has updated the turbocharger to variable nozzle turbo (VNT) with intercooler. This increased the horsepower to {{convert|106|kW|hp PS|0|abbr=on}} at 3400 rpm and torque to {{convert|343|Nm|lbft|0|abbr=on}} at 1600-2800 rpm.[1] Compression ratio is 18.5:1. Redline of this engine is 4400 RPM. This engine also uses D-4D Common Rail (Common rail direct fuel injection) technology. The manufacturers default injection timing is 6.5 deg before TDC. The only major changes from the 1KD-FTV to the 2KD-FTV was the bore and the stroke. In 2005, Denso Corporation was introduced the 3rd generation of Common Rail System (CRS) on the next 2KD-FTV engine (2005). This fuel system provides an ultra high injection pressure up to {{convert|200|MPa|abbr=on}} in order to promote the clean diesel engine. In this engine, the compression ratio was reduced to 17.4:1 with high pressurized and multiple diesel injection. The multiple injection consists of a pilot injection and a main injection, in order to shortening the ignition delay, reduce the noise and {{NOx}} emission. The pilot injection timing is 5-6 deg before TDC (dependent to the correction factor by the ECU) while the main injection timing is on the TDC. However, the pilot injection is repealed as the engine speed reach to 2200 rpm and above at low load condition. This generation of 2KD-FTV engine produces {{convert|88|kW|hp PS|0|abbr=on}} at 3600 rpm and the maximum torque is {{convert|325|Nm|lbft|0|abbr=on}} at 2000 rpm. This engine is used in the Toyota Hilux, Toyota Fortuner, Toyota Innova and Toyota Hiace. In some Central and South American countries, Toyota also offered this engine on the 2003-2006 4Runner in limited quantities. See also{{commons category|Toyota KD engines}}
References1. ^{{cite web | url=http://www.toyota.co.th/en/models/Vigo_Double_Cab/vigo_doublecab_home.htm | title=Toyota Hilux Vigo ::: Double Cab | deadurl=yes | archiveurl=https://web.archive.org/web/20110811051705/http://www.toyota.co.th/en/models/Vigo_Double_Cab/vigo_doublecab_home.htm | archivedate=2011-08-11 | df= }} 2 : Toyota engines|Diesel engines by model |
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