IC engine fuel injection system - has high and low pressure stores, controlled valve, buffer and throttles to increase flow at each injection

摘要

The ic engine fuel injection system comprises a pump-fed high constant-pressure fuel storage unit connecting to the fuel chambers at the injector needle seats via synchronously controlled valves with downstream pressure relief lines containing throttles orifices. All lines lead to a low constant-pressure store with a fuel return line, and the chambers connect to a buffer chamber. Each fuel line contains a throttle upstream of the valve. The two throttles are such that, during each injection, the pressure increases from the low to the high storage pressure and, during each interval, again drops to the low pressure, so that the amount injected per unit time gradually increases during each injection.