The cryogenic propulsion module comprises a main cryogenic thruster (10), two attitude-controlling secondary thrusters (21, 22), tanks (31, 32, 33, 34) for feeding cryogenic propellants, a device for intermittently pressurizing the tanks (31, 32, 33, 34), and a device for initiating firing of the main cryogenic thruster (10) in intermittent manner while the tanks (31, 32, 33, 34) are intermittently pressurized. The device for intermittently pressurizing a tank (31, 32, 33, 34) comprises a heat exchange circuit associated with a heat accumulator (61, 62) and a device (71, 72) for putting a predetermined quantity of a propellant into circulation in the heat exchanger circuit. The module also comprises a device for heating the heat accumulator (61, 62) in the periods between two consecutive firings.

O módulo criogênico da propulsão compreende um thruster criogênico principal (10), dois thrusters secundários atitude-controlando (21, 22), tanques (31, 32, 33, 34) para alimentar propulsores criogênicos, um dispositivo para intermitentemente pressurizar os tanques (31, 32, 33, 34), e um dispositivo para iniciar o acendimento do thruster criogênico principal (10) na maneira intermitente quando os tanques (31, 32, 33, 34) forem pressurizados intermitentemente. O dispositivo para intermitentemente pressurizar um tanque (31, 32, 33, 34) compreende um circuito da troca de calor associado com um acumulador do calor (61, 62) e um dispositivo (71, 72) para pôr uma quantidade predeterminada de um propulsor na circulação no circuito do cambista de calor. O módulo compreende também um dispositivo para aquecer o acumulador do calor (61, 62) nos períodos entre dois acendimentos consecutivos.

 
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