Honda D12 engine 

The Honda D12 is an engine in-line 1.2 litres 4-cylinder petrol from Honda used from 1988 to 1991 in the Honda City and Civic.

History

The Honda D-series engine is an automotive internal combustion, four-stroke gasoline, in-line 4-cylinder internal combustion heat engine used in a multitude of compact Honda vehicles, more commonly used in a variety of compact models, most commonly the Honda Civic, CRX, Logo, Stream, and first-generation Integra. It is the successor engine to the conventional ER, EV and EW types. Their displacements vary from 1 234 cm ³ to 1668 cm ³, there are single overhead camshaft and double overhead camshaft versions, some of which are single-shaft versions in VTEC or E-VTEC the power varies from 62 to 130 horses. The “d-series” blocks were produced from 1984 until 2005. in the Civic Si. D-series production commenced 1984 and ended 2005. D-series engine technology culminated with production of the D15B 3-stage VTEC (D15Z7) which was available in markets outside of the United States.

Earlier versions of this engine also used a single port fuel injection system Honda called PGM-CARB, signifying the carburettor was computer controlled.Carburettor (down draft, fixed venturi and side draft, variable venturi type) and PGM-FI (multi-point and dual point- throttle body injection) specifications are available for the fuel supply system according to the vehicle type and emission regulations of the country where it is sold. 

D12 series engines (1.2 L) specifications 

D12A

• Found in:
• 1986-1988 Honda City GG (Japanese Market)
• Displacement: 1237 cc (75.5 cu in)
• Bore and Stroke: 72 mm x 76 mm (2.83 in x 2.99 in)
• Compression: 9,5:1
• Power: 76 PS (56 kW; 75 hp) at 6,500 rpm
• Torque: 10.0 kg⋅m (98 N⋅m; 72 lb⋅ft) at 4,000 rpm
• Valve mechanism: SOHC belt drive intake 2 exhaust 2
• Fuel Control: Single Carburettor

D12B1

• Found in:
• 1988-1990 Honda Civic (European Market)
• Displacement: 1,193 cc (72.8 cu in)
• Firing order 1-3-4-2
• Compression ratio 8,6:1
• Bore and Stroke: 75.0 mm × 67.5 mm (2.95 in × 2.66 in)
• Compression: 8,6:1
• Power: 74 PS (54 kW; 73 hp) at 6300 rpm
• Torque: 88 N⋅m (9.0 kg⋅m) at 3500 rpm
• Valvetrain: SOHC (4 valves per cylinder)
• Fuel Control: Single Carburettor PGM-CARB