Ford B3DA Specifications
| Engine Model: Ford B3DA |
| Engine Type: 4-cycle 3-cylinder DOHC 12-valve turbocharged liquid-cooled gasoline |
| Total Displacement: 61 cu.in (0.99 L) |
| Rated Engine Power: 100 Hp (74 kW) at 6000 rpm |
| Fuel System Type: Gasoline direct injection |
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The Ford B3DA is a 1.0-liter, 3-cylinder gasoline
engine belonging to the Ford EcoBoost family. Introduced around 2018 as an
evolution of the earlier 1.0L EcoBoost, it represents a significant shift in
small-displacement powertrain engineering. Designed primarily for European
market applications, this engine is characterized by its compact architecture,
high specific output, and the integration of advanced technologies such as
direct fuel injection and Twin Independent Variable Camshaft Timing.
A defining feature of this generation is the implementation of a belt-in-oil
timing drive system, a design chosen for its frictional efficiency and
contribution to the engine’s quiet operation. The B3DA delivers a balance of
performance and efficiency, making it a common powerplant in models like the
Ford Focus Mk4 and Transit Courier, where it provides responsive torque from low
engine speeds.
The Ford B3DA is a turbocharged, inline three-cylinder gasoline engine operating
on a four-stroke cycle. Its fundamental architecture is derived from the Fox
platform of EcoBoost engines. The engine utilizes a closed-deck cylinder block
design to enhance structural rigidity under high combustion pressures.
The valvetrain is a double overhead camshaft configuration actuating four valves
per cylinder, resulting in a total of twelve valves. The combustion chamber
design is optimized for charge motion, supporting the efficiency of the direct
injection system. The engine management system is a Bosch or Delphi unit
controlling all aspects of fuel delivery, ignition timing, and boost pressure.
Engine Type: Inline 3-cylinder, 4-stroke, turbocharged gasoline.
Engine Family: Ford EcoBoost (Fox platform).
Displacement: 999 cc (61.0 cu.in).
Bore x Stroke: 71.9 mm x 82.0 mm (2.83 in x 3.23 in).
Compression Ratio: 10.5:1.
Maximum Power Output: 100 hp (74 kW) @ 4,500-6,000 rpm.
Maximum Torque: 170 Nm (125 lb-ft) @ 1,400-4,000 rpm.
Valvetrain: DOHC, 4 valves per cylinder, Twin Independent Variable Camshaft
Timing.
Firing Order: 1-2-3.
Idle Speed: 850 ± 50 rpm.
The cylinder block is constructed from gray cast iron,
a material selected for its durability, noise, vibration, and harshness
attenuation properties, and its ability to withstand the thermal and mechanical
stresses of turbocharging. The design is a deep-skirt configuration, providing
high stiffness to the bottom end. The cylinder bores are machined with a plateau
honed finish to optimize oil retention and piston ring sealing.
There are no separate cylinder liners; the bores are integral to the block. The
block incorporates an integrated oil filter housing and a water jacket that
surrounds the cylinders to facilitate efficient heat transfer. The crankshaft is
supported by five main bearings, with the bearing caps secured to the block via
transverse bolts for increased rigidity.
The cylinder head is manufactured from cast aluminum
alloy, which provides lightweight construction and efficient heat dissipation.
It is a cross-flow design with the intake ports positioned on one side and the
exhaust ports on the other, incorporating an integrated exhaust manifold. This
integrated manifold routes exhaust gases directly into the turbocharger housing,
reducing weight and allowing for faster catalyst light-off.
The DOHC valvetrain utilizes roller finger followers to actuate the valves,
minimizing frictional losses. The intake and exhaust valves are made from
heat-resistant steel. The valve stems are equipped with low-friction seals. The
Ti-VCT system allows independent adjustment of the intake and exhaust camshaft
phasing across a range of up to 50 degrees of crankshaft angle, enabling
optimization of volumetric efficiency across the operating range. Valve
clearances are set by selecting appropriate tappet thicknesses and are not
intended for routine adjustment.
The fuel system is a high-pressure direct injection
architecture. A low-pressure fuel pump located in the fuel tank supplies fuel to
a high-pressure pump mounted on the cylinder head. This high-pressure pump,
driven by a camshaft lobe, generates fuel pressure up to 200 bar (2,900 psi).
The fuel is then delivered to direct injection injectors mounted centrally in
the cylinder head, which spray fuel directly into the combustion chamber during
the compression stroke. The injection timing and pressure are controlled by the
engine control unit to enable stratified or homogeneous charge combustion modes,
depending on load and engine temperature.
The lubrication system is a pressurized, wet-sump
configuration. An oil pump, integrated into the front cover and driven by the
crankshaft, draws oil from the sump and circulates it through a full-flow oil
filter. The system is designed to provide a stable oil supply to the crankshaft,
connecting rod, and camshaft bearings, as well as to the variable cam timing
actuators and the turbocharger bearing cartridge.
A critical feature is the oil-bath timing belt, which resides within the
engine’s lubrication circuit and is thus constantly exposed to engine oil. The
oil pump is a variable displacement design in some applications to reduce
parasitic losses at higher engine speeds. The engine oil capacity with filter is
approximately 4.6 liters (4.86 US qt), with a dry sump capacity of approximately
4.4 liters (4.65 US qt). The specified oil grade is SAE 5W-20 conforming to Ford
specification WSS-M2C948-B.
The cooling system employs a split cooling architecture
utilizing two thermostats. This system separates the cooling circuit for the
cylinder block from that of the cylinder head. During engine warm-up, one
thermostat remains closed to allow the cylinder block to heat more rapidly,
reducing friction and improving thermal efficiency, while a separate circuit
allows coolant to circulate through the cylinder head to provide immediate
cooling to the combustion chamber and turbocharger.
The primary water pump is a belt-driven centrifugal type. The system includes an
expansion tank for de-aeration and thermal expansion management. Total coolant
capacity varies by vehicle application but generally ranges from 5.8 liters
(6.13 US qt) for models with a standard heating circuit to 8.5 liters (8.98 US
qt) for those equipped with an auxiliary heater or additional cooling loops for
ancillary systems.
| Intake and Exhaust Systems |
Intake System: The intake manifold is constructed from
plastic composite to reduce weight and thermal conductivity. It features a
charge air cooler integrated between the turbocharger compressor outlet and the
throttle body to reduce the temperature of the compressed intake air, increasing
density and resistance to detonation.
Exhaust System: The exhaust manifold is integrated into the cylinder head
casting. A single-scroll turbocharger is flange-mounted directly to the cylinder
head. The exhaust system downstream of the turbocharger incorporates a
close-coupled three-way catalytic converter to minimize emissions during cold
starts.
| Ignition and Electrical System |
Ignition System: The ignition system is a coil-on-plug
design, with a dedicated ignition coil for each cylinder mounted directly over
the spark plug. This arrangement eliminates high-tension spark plug wires and
provides precise control of ignition timing.
Electrical System: A 12-volt system with a battery management system is
standard. The alternator is controlled by the engine control unit to manage
electrical load and reduce fuel consumption through regenerative braking
strategies in some vehicle applications.
Overall Length (front to rear): 530 mm (20.9 in)
Overall Width (intake to exhaust): 635 mm (25.0 in)
Overall Height (oil pan to valve cover): 650 mm (25.6 in)
Dry Weight (fully dressed, without vehicle-specific components): 98 kg (216 lb)
Dry Weight (short block): 48 kg (106 lb)
Maintenance intervals are determined by the vehicle’s
onboard service indicator system, which considers engine operating conditions
and time. Standard service intervals for oil and oil filter changes are up to 12
months or 15,000 km (9,000 miles) under normal operating conditions. The spark
plug replacement interval is 60,000 km (37,000 miles). A critical maintenance
consideration for this engine is the timing belt, which operates in the engine
oil.
The replacement interval for this belt is defined by the manufacturer as 10
years or 240,000 km (150,000 miles), contingent on the use of the correct engine
oil specification. Use of incorrect oil can accelerate belt degradation. The
engine coolant should be replaced at intervals defined by the vehicle
manufacturer, generally every 6 years or 120,000 km (75,000 miles) for the
initial fill, followed by every 3 years thereafter.
Cylinder Head Bolts (Stage 1): 40 Nm (30 lb-ft)
Cylinder Head Bolts (Stage 2): 90-deg angle turn
Cylinder Head Bolts (Stage 3): 90-deg angle turn
Cylinder Head Bolts (Stage 4): 90-deg angle turn
Main Bearing Cap Bolts: 20 Nm (15 lb-ft) + 90-deg angle turn
Connecting Rod Cap Bolts: 20 Nm (15 lb-ft) + 90-deg angle turn
Camshaft Bearing Cap Bolts: 12 Nm (9 lb-ft)
Flywheel/Flexplate Bolts: 30 Nm (22 lb-ft) + 90-deg angle turn
Spark Plugs: 15 Nm (11 lb-ft)
Oil Filter (spin-on type): 15 Nm (11 lb-ft)
Turbocharger to Cylinder Head Nuts: 23 Nm (17 lb-ft)
The Ford B3DA engine was primarily utilized across the
Ford passenger car and light commercial vehicle ranges in the European market,
among others. Its deployment began approximately in 2018.
Ford Focus Mk4 (2018-present): Served as a core engine option across multiple
trim levels, including the Titanium, ST-Line, and Active variants, often
designated with the 1.0L EcoBoost 100 PS nomenclature.
Ford C-MAX II / Grand C-MAX (2018-2019): Installed in the final production years
of the compact multi-purpose vehicle range.
Ford Transit Courier (2018-present): Provided the powertrain for this light
commercial vehicle and passenger van variant, where its low-end torque
characteristics were particularly suited to urban and load-carrying duties.
Ford Fiesta Mk8 (select markets): Deployed in certain European markets as an
entry-level EcoBoost offering in the Fiesta range.
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