Patent ID: 8683988

Claim:
A method of limiting a peak temperature of a combustion chamber in a plurality of interconnected engines, the method comprising: controlling the peak temperature of a combustion chamber in a first engine comprising in a first portion of a cycle of the first engine; injecting fuel directly into the combustion chamber during at least one of an intake stroke and a compression stroke of the first cycle; and igniting the fuel in the combustion chamber to cause combustion; monitoring a temperature of the combustion chamber resulting from the combustion; and in at least one of the first portion or a second portion of the cycle of the engine when the temperature reaches a predetermined value, injecting coolant directly into the combustion chamber during at least one of a power stroke and/or an exhaust stroke of the cycle; controlling the peak temperature of a combustion chamber in a second engine according to the steps recited for controlling the peak temperature of a combustion chamber in the first engine, wherein an exhaust stream from the first engine is a working fluid for the second engine such that the first engine is fluidically coupled to the second engine.