Engine operation parameter estimation method

Details Engine operation parameter estimation method Engine operation parameter estimation method

2005-04-19

2005-04-19

Argenbright, Tony M. (Department: 3747)

Internal-combustion engines

Charge forming device

Fuel injection system

C073S116070, C701S102000

Reexamination Certificate

active

06880532

ABSTRACT:
A direct injection engine is coupled to a vacuum brake booster wherein vacuum created from engine pumping is used to supplement driver braking force. The brake booster is coupled through a check valve to the engine intake manifold. A method is disclosed for estimating pressure in the brake booster based on operating conditions. A method is also disclosed for estimating operating parameters based on measured brake booster pressure. Further, a method is disclosed for diagnosing degradation, or monitoring, a brake booster pressure sensor based on operating conditions. In addition, a method is disclosed for diagnosing degradation in other vehicle and engine sensors based on measured brake booster pressure.

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