Fleet News

Toyota perks up petrol economy

TOYOTA has released details of a direct injection petrol engine which will beat a diesel engine's economy and a conventional petrol engine's performance. Conventional fuel-injected petrol engines fire petrol into the intake ports but Toyota's new 2.0 litre units inject it straight into the cylinders.

Pumping losses occur during the intake stroke. In conventional engines the throttle is nearly closed when the engine is under light load and that increases pumping loss. Pumping loss can be reduced by allowing large amounts of air into the cylinders which makes the mixture very lean. In other words the volume of injected fuel remains the same while the volume of intake air increases.

Mitsubishi is even further on with the concept and a direct injection petrol car is already on sale in Japan. The 1.8 litre engine will power a Carisma in 1997.

Leave a comment for your chance to win £20 of John Lewis vouchers.

Every issue of Fleet News the editor picks his favourite comment from the past two weeks – get involved for your chance to appear in print and win!

Login to comment

Comments

No comments have been made yet.

Compare costs of your company cars

Looking to acquire new vehicles? Check how much they'll cost to run with our Car Running Cost calculator.

What is your BIK car tax liability?

The Fleet News car tax calculator lets you work out tax costs for both employer and employee