The instantaneous rate of fuel injection has been measured in a diesel combustion bomb. For this purpose two methods were used: a measurement based on the velocity of a pumping piston and a measurement based on the injection pressure, and an assigned discharge coefficient. The two methods are discussed in detail and yield nearly the same result.The boundary conditions are characterized by time and spatially resolving the wall temperature, the heat flux (radiative plus convective) and the normal component of the radiant heat flux. Thin film surface thermocouples and a two-color pyrometer are used for these measurements.A unique fuel injection system designed for single shot experiments has been designed and the details are presented. Results of exploratory experiments are presented to demonstrate the versatility of this system.