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Method and system enabling informed decision on stop-start engine in a congested traffic condition

IP.com Disclosure Number: IPCOM000253942D
Publication Date: 2018-May-16
Document File: 2 page(s) / 10K

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Method and System Enabling Informed Decision on Stop-Start Engine in a Congested Traffic Condition

Many cars have engine stop-start technology which stops the engine to reduce fuel consumption. Usually, the engine is stopped when a number of conditions are met, such as the car being stationary, not in gear, and the parking brake applied, and starts again when any of these conditions change.

When the amount of stop-start time is very small, the car engine ends up with frequent stop-start, which is unlikely to be efficient and causes unnecessary wear and tear to the car components and annoys the driver.

Prior art ‘Method and system for opportunistically automatically stopping an engine of a vehicle’ US9151263 [1] inhibits car engine being stopped at various road conditions, such as approaching roundabout, passing road sign etc.. In particular US9151263 proposes that if the car is travelling on a highway and the surrounding cars are moving the car engine is not stopped. If the surrounding cars are stationary the car engine can then be stopped. The downside of this prior art is, while the surrounding cars are stationary, the ones that are in front of them may be moving or started to move, which means that car would be moving very soon. Stopping the engine based on surrounding cars being stationary may not be reliable. A better solution is needed for cars with an unpredictable slow-moving traffic pattern which is often seen in a congested situation.

Another prior art ‘System and method for controlling vehicle engine running state at busy intersections for increased fuel consumption efficiency’ US20100125402 [2] aims at intersections that have timed traffic lights which broadcast the front car how long before the traffic will change and send start-engine or stop-engine signal to queued cars. This is a predicable situation so different from slow-moving traffic in a congested situation.

We propose a system that runs on car, which does the following: 1. when a car starts to move or about to move by detecting changes to the car’s

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