Honda P engine


The Honda P engine is an inline three-cylinder gasoline engine first designed for use in Honda kei cars. The P engine was first used in the fourth generation Honda Life, as a successor to the Honda E07A engine. The P engine series was initially produced in only one displacement variant: 658 cc, either naturally aspirated or turbocharged. A turbocharged one-litre version, the P10A, has since been developed.

Design

The P-series engine was introduced in the fourth generation Honda Life in September, 2003. The engine uses a single overhead camshaft to drive two valves per cylinder. It also features the i-DSI spark ignition system, which utilizes two spark plugs per cylinder. The spark plugs fire sequentially, one after the other, in order to more completely burn the fuel charge for more power, lower fuel consumption and lower emissions. Fuel is delivered using Honda's PGM-FI electronic fuel injection system.
An unusual feature of this engine's design is that it does not have a separate exhaust manifold. Instead the exhaust gasses collect in the passages of the cylinder head itself and are fed directly into the catalytic converter. Honda claims this design helps to warm the catalyst quicker in order to more effectively filter out harmful emissions.
The larger P10A shares an bore spacing and most other basic dimensions with the 1.5-liter four-cylinder NA engine, increasing parts commonality and simplifying manufacture.

Variants

P07A