Which of the following is NOT one of the four common hydraulic assist pump designs?

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Multiple Choice

Which of the following is NOT one of the four common hydraulic assist pump designs?

Power steering and similar hydraulic assist systems rely on compact rotary pumps. The common designs you’ll encounter are roller, slipper, gear, and vane types. A piston-type pump, while used in other hydraulic applications, is a reciprocating design and isn’t grouped with these four in automotive practice. Rotary designs provide smooth, continuous flow at engine speeds and fit in tight spaces, whereas piston pumps tend to be larger and deliver pulsating flow. Therefore, piston is not one of the four common hydraulic assist pump designs.

Power steering and similar hydraulic assist systems rely on compact rotary pumps. The common designs you’ll encounter are roller, slipper, gear, and vane types. A piston-type pump, while used in other hydraulic applications, is a reciprocating design and isn’t grouped with these four in automotive practice. Rotary designs provide smooth, continuous flow at engine speeds and fit in tight spaces, whereas piston pumps tend to be larger and deliver pulsating flow. Therefore, piston is not one of the four common hydraulic assist pump designs.

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