Braking systemMechanical single-vane vacuum pump

Product benefits

f Low weight due to thermoplastic rotor

f High evacuation performance

f Noise-optimized design

f Very low CO₂ emissions through minimized friction loss

f Optimized, modular design

f Safety options for optimized cold start and for avoiding counter-rotation

f High quality level (Bosch Quality Award 2011)

Vehicle segments

Spigot

Cover

Oil inlet

Oldham coupling

Mounting fixation holes

Housing

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3

6

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5

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6

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Oil

Oil pan

Air and Oil

Pneumaticactuators

Braking system Mechanical single-vane vacuum pump

Robert Bosch GmbH | PO 10 60 50 | 70049 Stuttgart | Germany | www.bosch-mobility-solutions.de Printed in Germany 292000P1EA-2015-DS © Robert Bosch GmbH 2015. All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights.

Task In diesel and modern gasoline engines with low intake-manifold vacuum, the mechanical single-vane vacuum pump ensures the vacuum supply for the pneumatic operation of various components, e. g. brake booster, exhaust gas recirculation valve, swirl actuator, wastegate valve on the exhaust gas turboch-arger and central locking system.

Function Bosch’s mechanical single-vane pump al-lows a particularly efficient operation thanks to its optimized de-sign and its very light thermoplastic rotor. In addition, it reduces the noise at low idle speed enhancing driving comfort. Vacuum is generated in the pump housing by means of a rotating, eccentri-cally mounted single vane. This alternatingly creates a suction and a compression chamber, thus generating vacuum. The me-chanical single-vane vacuum pump offers a wide range of displa-cements and rotation speed for the optimum operating of various components.

Variants Depending on customer’s request, the me-chanical single-vane pump can be driven either by engine cams-haft or by crankshaft via pulley, gear or chain. It can also be com-bined with an oil and/or fuel pump (including high-pressure pump). As a result, it meets the highest installation space require-ments of modern engines.

−200 gWeight reduction through the use of thermoplastic rotor, resul-ting in more dynamic driving behavior and lower CO₂ emissions.

Technical characteristics

Direction of rotation

Right/left

Lubrication Engine oil

Drive Driven directly by engine camshaft or crankshaft via pulley, gear or chain

Optimized torque absorption leads to emission reduction compared to the average market level of new applications.

–0.6 g CO₂/km

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2

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Construction

Single-vane vacuum pump

Non-return valve

Brake booster

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