Patent ID: 7959237

Claim:
A braking device for a motor vehicle fitted with an air conditioning circuit (K) containing a cooling fluid, a compressor (K 1 ) and an expansion valve (K 2 ), including a first source of cooling fluid (F 1 ) selectively delivering a gaseous cooling fluid at a high pressure, a second source of cooling fluid (F 2 ) selectively delivering the gaseous cooling fluid at a low pressure that is lower than the high pressure, and a pneumatic brake booster (F 3 ) comprising a variable volume working chamber (F 30 ) and a control valve (F 31 ) selectively actuated by a first impulse and by a second impulse, the control valve being operable to connect the working chamber (F 30 ) to the first (F 1 ) source of cooling fluid in response to receipt of the first impulse and being operable to connect the working chamber (F 30 ) to the second (F 2 ) source of cooling fluid in response to receipt of the second impulse, characterized in that the first source of fluid (F 1 ) comprises a first portion (KC 1 ) of the air conditioning circuit (K) that is located downstream of the compressor (K 1 ) and is located upstream of the expansion valve (K 2 ) a direction of flow (X) of the cooling fluid in the air conditioning circuit (K).