BMW B48 - Misplaced Pages

(Redirected from BMW B46) Turbocharged inline-four petrol engine Reciprocating internal combustion engine

BMW B48

Overview
Manufacturer	BMW
Production	2014–present
Layout
Configuration	Inline-four
Displacement	1,597 cc (97 cu in) 1,998 cc (122 cu in)
Cylinder bore	82.0 mm (3.23 in)
Piston stroke	75.6 mm (2.98 in) 94.6 mm (3.72 in)
Cylinder block material	Aluminium
Cylinder head material	Aluminium
Valvetrain	DOHC, with VVT & VVL
Valvetrain drive system	Chain
Compression ratio	8.9:1 11:1
Combustion
Turbocharger	Single twin-scroll with air-to-liquid intercooler
Fuel system	Bosch HDEV5/HDEV5 EVO 200 bar (2,901 psi) central high-pressure Gasoline direct fuel injection. One direct injector per cylinder fed by an Bosch engine-driven high-pressure fuel pump (B48 non-TU) Bosch HDEV6 350 bar (5,076 psi) central high-pressure gasoline direct fuel injection. One direct injector per cylinder fed by an Bosch HDP6 engine-driven high-pressure fuel pump (B48TU)
Management	Bosch Di-Motronic
Fuel type	Petrol
Oil system	Wet sump with water heat exchanger
Cooling system	Water-cooled
Output
Power output	115–225 kW (154–302 hp)
Torque output	250–450 N⋅m (184–332 lb⋅ft)
Chronology
Predecessor	BMW N20

The BMW B48 is a turbocharged inline-four petrol engine which replaced the BMW N20 and has been in production since 2014. It was first used in the F56 Mini Hatch and has been used in BMW applications since 2015.

The B48 is part of a modular BMW engine family of 3-cylinder (B38/B37), 4-cylinder (B48/B47) and 6-cylinder (B58/B57) engines, which use a displacement of 500 cc (30.5 cu in) per cylinder.

Design

Compared with its N20 predecessor, the B48 uses a more undersquare design, and engine block in "closed-deck construction". As with the N20, the block and head are made from aluminium. Other features shared with the N20 include a twin-scroll turbocharger, direct injection, variable valve lift (Valvetronic) and variable valve timing (Double VANOS).

Technical Update versions

The B48 engine was revised in 2018, dubbed "B48TU" ("Technical Update"), with notable changes and improvements; a new one-part timing chain as opposed to the earlier two-part, a new separate cooling circuits for the cylinder head and crankcase, and forged conrods and forged crankshaft is now 2.03 lb (1 kg) lighter due to the use of lighter materials and different machining. The fuel system also upgraded with the new Bosch HDP6 high pressure fuel pump and Bosch HDEV6 injectors that borrows from the P48 Turbo Engine.

Models

Engine		Power	Torque	Years
B48B16	1,597 cc (97 cu in)	125 kW (168 hp) at 5,000–6,000 rpm	250 N⋅m (184 lb⋅ft) at 2,000–4,700 rpm	2017–
B48B20	1,998 cc (122 cu in)	115 kW (154 hp) at 4,500–6,500 rpm	250 N⋅m (184 lb⋅ft) at 1,300–4,300 rpm	2020–
B48A20U1		131 kW (176 hp) at 5,000–5,500 rpm	280 N⋅m (207 lb⋅ft) at 1,350–4,200 rpm	2020–
B48B20M0		135 kW (181 hp) at 5,000–6,500 rpm	270 N⋅m (199 lb⋅ft) at 1,350–4,600 rpm	2016–
B48B20M0		135 kW (181 hp) at 5,000–6,500 rpm	290 N⋅m (214 lb⋅ft) at 1,350–4,250 rpm	2016–
B48A20M1		141 kW (189 hp) at 5,000–6,500 rpm	280 N⋅m (207 lb⋅ft) at 1,250–4,600 rpm	2014–
		141 kW (189 hp) at 4,700–6,000 rpm	280 N⋅m (207 lb⋅ft) at 1,250–4,750 rpm
		141 kW (189 hp) at 5,000–6,000 rpm	280 N⋅m (207 lb⋅ft) at 1,350–4,600 rpm
		195 kW (261 hp) at 5,000–6,000 rpm	400 N⋅m (295 lb⋅ft) at 1,350–4,600 rpm
B48B20M1		145 kW (194 hp) at 4,500–6,600 rpm	320 N⋅m (236 lb⋅ft) at 1,450–4,200 rpm	2019–
B48B20O1		165 kW (221 hp) at 5,000–6,500 rpm	310 N⋅m (229 lb⋅ft) at 1,400–5,000 rpm	2016–
B48A20O1		170 kW (228 hp) at 5,000–6,000 rpm	350 N⋅m (258 lb⋅ft) at 1,250–4,500 rpm	2015–
		170 kW (228 hp) at 5,200–6,200 rpm	300 N⋅m (221 lb⋅ft) at 1,250–4,800 rpm
		170 kW (228 hp) at 5,000–6,000 rpm	350 N⋅m (258 lb⋅ft) at 1,450–4,500 rpm
B48O1ZIK		180 kW (241 hp) at 4,500–6,500 rpm	400 N⋅m (295 lb⋅ft) at 1,600–4,000 rpm
B48B20O0		185 kW (248 hp) at 5,200–6,500 rpm	350 N⋅m (258 lb⋅ft) at 1,450–4,800 rpm	2015–
B48B20O1		190 kW (255 hp) at 5,000–6,500 rpm	400 N⋅m (295 lb⋅ft) at 1,550–4,400 rpm	2016–
B48A20T1		225 kW (302 hp) at 5,000–6,250 rpm	450 N⋅m (332 lb⋅ft) at 1,750–4,500 rpm	2019–

115 kW version

2020–present G20 318i
2022–present G42 218i

125 kW version

2019–present G20 320i (Turkish and Tunisian market)
2020–present G22 420i (Turkish market)
2021–present G26 420i (Turkish market)
2017–present G30 520i (Turkish and Tunisian market)
2018–present G01 X3 sdrive20i (Turkish market)

131 kW version

2021–present F54 MINI Cooper S Clubman (B48A20M)
2020–present F40 BMW 120i

135 kW version

When combined with the electric motor, the 330e and 530e overall output is 185 kW (248 hp) and 420 N⋅m (310 lb⋅ft).

2016–2019 F20 120i
2016–2019 F22/F23 220i
2015–2019 F30/F31/F34 320i
2016–2019 F30 330e
2016–2019 F32/F33/F36 420i
2017–present G30/G31 520i
2018–present G30/G31 530e
2018–present G01 X3 xDrive20i
2018–present G02 X4 xDrive20i
2019–present G20 320i
2019–present G20 330e
2020–present G22 420i
2021–present G42 220i

141 kW version

2017–2020 F60 MINI Cooper S Countryman
2014–2017 F45 BMW 2 Series Active/Gran Tourer 220
2024–present G45 X3 20/30e xDrive

145 kW version

In the MINI Cooper S, a temporary overboost increases peak torque by 20 N⋅m (15 lb⋅ft) to 300 N⋅m (221 lb⋅ft).

2014–present F56 MINI Cooper S (B48A20A)
2020–present F44 220i Gran Coupe
2016–present F48 X1 20i
2017–present F39 X2 sDrive20i
2018–present G29 Z4 sDrive20i
2019–present J29/DB82 Toyota Supra (Japanese SZ models)

165 kW version

2016–2019 F20 125i
2021–present U06 223i

170 kW version

2014–present F56 MINI JCW Hardtop and JCW Cabrio (320 Nm)
2017–present F56 MINI JCW Clubman and JCW Countryman ALL4 (350 Nm)
2015–present F45 Active Tourer 225i
2016–present F48 X1 25i/28i
2017–present F39 X2 25i/28i
2019–current F44 228i Gran Coupé xDrive

180 kW version

2022–present G42 230i
2022–present G20/G21 330i
2022–present G22 430i
2023–present U11 X1 28i xDrive

185 kW version

2015–2019 F30/F31/F34 330i
2016–present F22/F23 230i
2016–present F32/F33/F36 430i
2018–present G01 X3 xDrive30i
2018–present G02 X4 xDrive30i
2020–present G01 X3 xDrive30e (PHEV Version)
2016–present G30/G31 530i

190 kW version

2016–present G11 730i/730Li
2017–2019 G11 740e xDrive/740Le xDrive (combined with an 82 kW electric motor for a total output of 240 kW)
2017–2021 G32 630i
2019–2022 G20/G21 330i
2019–present G29 Z4 sDrive30i
2019–present J29/DB22 Toyota Supra
2020–present Morgan Plus Four
2020–present G22/G23/G26 430i

195 kW version

2020–present BMW F40 128ti

225 kW version

Introduced in May 2019 this engine features a reinforced crankshaft with larger main bearings and new pistons with a lower 9.5:1 compression ratio, this allows the engine to take more boost pressure from a larger turbocharger, which blows compressed air through a reworked intake tract.